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Porin (protein)

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with both types of porins have been found. They exhibit similar transport functions but have a more limited variety of porins, compared to the distribution found in gram-negative bacteria. Gram-positive bacteria lack outer membranes, so these porin channels are instead bound to specific lipids within
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molecules of various sizes and charges across the membrane. For survival, certain required nutrients and substrates must be transported into the cells. Likewise, toxins and wastes must be transported out to avoid toxic accumulation. Additionally, porins can regulate permeability and prevent lysis by
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Several parameters have been used to describe the structure of a porin protein. They include the tilting angle (α), shear number (S), strand number (n), and barrel radius (R). The tilting angle refers to the angle relative to the membrane. The shear number (S) is the number of amino acid residues
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Archaea also contain ion channels that have originated from general porins. The channels are found in the cell envelope and help facilitate solute transfer. They have similar characteristics as bacterial and mitochondrial porins, indicating physiological overlaps over all three domains of life.
600:, the inner membrane is the major permeability barrier. The outer membrane is more permeable to hydrophilic substances, due to the presence of porins. Porins have threshold sizes of transportable molecules that depend on the type of bacteria and porin. Generally, only substances less than 600 592:
Two types of porins exist to transport different materials– general and selective. General porins have no substrate specificities, though some exhibit slight preferences for anions or cations. Selective porins are smaller than general porins, and have specificities for chemical species. These
636:, through which eukaryotic organelles arose from gram-negative bacteria. However, eukaryotic porins exhibit the same limited diversity as gram-positive porins, and also display a greater voltage-dependent role during metabolism. 671:
in the porin gene. The mutations may lead to a loss of porins, resulting in the antibiotics having a lower permeability or being completely excluded from transport. These changes have contributed to the global emergence of
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porin. Depending on the size of the porin, the interior of the protein may either be filled with water, have up to two β strands folded back into the interior, or contain a "stopper" segment composed of β strands.
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found in each β strands. Strand number (n) is the amount of β strands in the porin, and barrel radius (R) refers to the radius of the opening of the porin. These parameters are related via the following formulas:
374:(β barrel). The amino acid composition of the porin β strands are unique in that polar and nonpolar residues alternate along them. This means that the nonpolar residues face outward so as to interact with the 392:
The β barrels that make up a porin are composed of as few as eight β strands to as many as twenty-two β strands. The individual strands are joined together by loops and turns. The majority of porins are
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Using these formulas, the structure of a porin can be determined by knowing only a few of the available parameters. While the structure of many porins have been determined using
712:β-strands (β-TMS). These include the GBP, SP and RPP porin families. While PSF I includes 47 families, PSF II-V each contain only 2 families. While PSF I derives members from 2995: 2247: 2180: 569:
Porins are water-filled pores and channels found in the membranes of bacteria and eukaryotes. Porin-like channels have also been discovered in archaea. Note that the term "
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Benz R (1989). "Porins from Mitochondrial and Bacterial Outer Membranes: Structural and Functional Aspects". In Azzi A, Nałęz KA, Nałęcz MJ, Wojtczak L (eds.).
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Yen MR, Peabody CR, Partovi SM, Zhai Y, Tseng YH, Saier MH (May 2002). "Protein-translocating outer membrane porins of Gram-negative bacteria".
632:. The organelles contain general porins that are structurally and functionally similar to bacterial ones. These similarities have supported the 3196: 2294: 1566: 1391: 1215: 141: 3248: 2429: 413:
in the outer membrane, meaning that three identical porin subunits associate together to form a porin super-structure with three channels.
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This superfamily includes protein that comprise pores in multicomponent protein translocases as follows: 3.A.8 - ; 1.B.69 - ; 3.D.9 -
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Novikova OD, Solovyeva TF (2009). "Nonspecific Porins of the Outer Membrane of Gram-Negative Bacteria: Structure and Functions".
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between each monomer in the homotrimer ensure that they do not dissociate, and remain together in the outer membrane.
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channel. The specific amino acids in the channel determine the specificity of the porin to different molecules.
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Faller M, Niederweis M, Schulz GE (February 2004). "The structure of a mycobacterial outer-membrane channel".
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specificities are determined by the threshold sizes of the porins, and the amino acid residues lining them.
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1.B.34 - The Corynebacterial Porin A (PorA) Family 1.B.59 - The Outer Membrane Porin, PorH (PorH) Family
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Galdiero S, Falanga A, Cantisani M, Tarallo R, Della Pepa ME, D'Oriano V, Galdiero M (December 2012).
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primarily one family of eukaryotic mitochondrial porins, PSF II and V porins are derived from
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The discovery of porins has been attributed to Hiroshi Nikaido, nicknamed "the porinologist."
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of porins. Porin superfamily I includes 47 families of porins with a range of numbers of
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Schulz GE (2004). "Chapter 2: The Structures of General Porins". In Benz R (ed.).
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that lead to bacterial degradation. Therapeutic treatments, like vaccinations and
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Schirmer T (1998). "General and specific porins from bacterial outer membranes".
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However, due to selective pressure, bacteria can develop resistance through
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Porins are also found in eukaryotes, specifically in the outer membranes of
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1.B.42 - The Outer Membrane Lipopolysaccharide Export Porin (LPS-EP) Family
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that are specific to different types of molecules. They are present in the
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1.B.78 - The DUF3374 Electron Transport-associated Porin (ETPorin) Family
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1.B.33 Outer membrane protein insertion porin (Bam complex) (OmpIP) family
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Rath P, Saurel O, Tropis M, Daffé M, Demange P, Milon A (November 2013).
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1.B.58 - Nocardial Hetero-oligomeric Cell Wall Channel (NfpA/B) Family
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Nucleoside-specific channel-forming outer membrane porin (Tsx) family
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1.B.57 - The Legionella Major-Outer Membrane Protein (LM-OMP) Family
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1.B.47 - The Plastid Outer Envelope Porin of 37 kDa (OEP37) Family
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1.B.30 - The Plastid Outer Envelope Porin of 16 kDa (OEP16) Family
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1.B.28 - The Plastid Outer Envelope Porin of 24 kDa (OEP24) Family
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1.B.72 - The Protochlamydial Outer Membrane Porin (PomS/T) Family
573:" refers to unrelated proteins that facilitate transport through 3689: 3684: 3679: 3669: 3664: 3659: 3649: 3644: 3639: 3634: 3629: 3624: 3619: 3604: 3599: 3594: 3589: 3584: 3579: 3518: 3513: 3508: 3503: 3498: 3404: 3392: 3387: 3382: 3313: 3266: 3230: 3225: 3220: 3215: 2942: 2760: 2318: 1655: 1645: 914:
1.B.71 - The Proteobacterial/Verrucomicrobial Porin (PVP) Family
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Bacterial and eukaryotic porins: structure, function, mechanism
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1.B.61 - The Delta-Proteobacterial Porin (Delta-Porin) Family
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1.B.68 - The Putative Beta Barrel Porin-5 (BBP5) Superfamily
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Porins were first discovered in gram-negative bacteria, but
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Porin Superfamily V (Corynebacterial PorA/PorH Superfamily)
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Porin Superfamily IV (Tim17/OEP16/PxMPL (TOP) Superfamily)
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1.B.22 Outer bacterial membrane secretin (secretin) family
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1.B.69 - The Peroxysomal Membrane Porin 4 (PxMP4) Family
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1.B.55 - The Poly Acetyl Glucosamine Porin (PgaA) Family
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Porins are primarily involved in passively transporting
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1.B.67 - The Putative Beta Barrel Porin-4 (BBP4) Family
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1.B.66 - The Putative Beta-Barrel Porin-2 (BBP2) Family
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1.B.32 Fusobacterial outer membrane porin (FomP) family
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1.B.11 Outer membrane fimbrial usher porin (FUP) family
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1.B.73 - The Capsule Biogenesis/Assembly (CBA) Family
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1.B.16 Short chain amide and urea porin (SAP) family
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Berlin, Heidelberg: Springer. pp. 199–214. 1334:Biochimica et Biophysica Acta (BBA) - Biomembranes 1060:Biochimica et Biophysica Acta (BBA) - Biomembranes 904:1.B.62 - The Putative Bacterial Porin (PBP) Family 542: 481: 814:1.B.19 Glucose-selective OprB porin (OprB) family 912:1.B.70 - The Outer Membrane Channel (OMC) Family 589:limiting the entry of detergents into the cell. 1283: 1281: 1279: 1277: 1275: 1238:Besnard M, Martinac B, Ghazi A (January 1997). 858:Oligogalacturonate-specific porin (KdgM) family 1233: 1231: 1229: 1227: 1152: 1150: 1148: 1146: 1144: 1142: 543:{\displaystyle \tan(\alpha )={\frac {Sa}{nb}}} 1560: 900:1.B.60 - The Omp50 Porin (Omp50 Porin) Family 811:Outer membrane auxiliary (OMA) protein family 8: 1369: 1367: 1365: 1363: 874:1.B.44 - The Probable Protein Translocating 768:Mitochondrial and plastid porin (MPP) family 704:, there are five evolutionarily independent 401:porins have been discovered, as well as an 3729: 3716: 2914: 2901: 2163: 2147: 1951: 1935: 1608: 1592: 1567: 1553: 1545: 1327: 1325: 1323: 1321: 1319: 1054:Tamm LK, Hong H, Liang B (November 2004). 209: 1522: 1473: 1432: 1376:Anion Carriers of Mitochondrial Membranes 1255: 1182: 1071: 1005:at the U.S. National Library of Medicine 816:1.B.20 Two-partner secretion (TPS) family 773:FadL outer membrane protein (FadL) family 520: 500: 447: 433: 350:(β strands) which are linked together by 845:major outer membrane porin (MomP) family 825:1.B.23 Cyanobacterial porin (CBP) family 733:1.B.2 - The Chlamydial Porin (CP) Family 1210:. Weinheim: Wiley-VCH. pp. 26–29. 995: 924:Porin Superfamily II (MspA Superfamily) 557:, the alternative method of sequencing 837:1.B.26 Cyclodextrin porin (CDP) family 370:and form a cylindrical tube, called a 366:on the other. The β strands lie in an 61: 1163:Current Protein & Peptide Science 7: 800:1.B.15 Raffinose porin (RafY) family 797:Outer membrane receptor (OMR) family 2933:Calcium-activated chloride channels 1244:The Journal of Biological Chemistry 863:Bacterial porin, OmpW (OmpW) family 299:, porins are large enough to allow 2003:Amiloride-sensitive cation channel 806:Outer membrane factor (OMF) family 25: 960:Mitochondrial Protein Translocase 834:Outer membrane porin (Opr) family 648:Many porins are targets for host 287:and act as a pore, through which 1475:10.1046/j.1365-2958.2003.03662.x 1425:10.1128/JB.187.24.8232-8236.2005 70: 3526:Voltage-dependent anion channel 1619:Inositol trisphosphate receptor 1456:Niederweis M (September 2003). 980:Voltage-dependent anion channel 3548:General bacterial porin family 730:General bacterial porin family 660:, are used to supplement this 514: 508: 473: 467: 1: 1524:10.1016/j.febslet.2013.09.032 1346:10.1016/s0005-2736(02)00359-0 1021:Journal of Structural Biology 604:in size can diffuse through. 213:Available protein structures: 1384:10.1007/978-3-642-74539-3_16 1073:10.1016/j.bbamem.2004.06.011 757:OmpA-OmpF porin (OOP) family 1407:Klebba PE (December 2005). 297:membrane transport proteins 27:Group of transport proteins 3819: 2967:Chloride Channel Accessory 1576:Membrane transport protein 1175:10.2174/138920312804871120 561:may also be used instead. 419:dipole-dipole interactions 334:(outer plastid membrane). 332:outer chloroplast membrane 3773: 3728: 3715: 2913: 2900: 2162: 2146: 1962:Epithelial sodium channel 1950: 1934: 1607: 1591: 1302:10.1134/S1990747809010024 559:protein primary structure 326:), the outer membrane of 322:(mycolic acid-containing 208: 69: 1879:Cation channels of sperm 1007:Medical Subject Headings 884:P44 (A-P44) Porin Family 876:Porphyromonas gingivalis 820:OmpG porin (OmpG) family 764:PorCa porin (RPP) family 744:Brucella-Rhizobium porin 3803:Outer membrane proteins 1413:Journal of Bacteriology 1290:Biologicheskie Membrany 1117:10.1126/science.1094114 753:OprP Porin (POP) Family 342:Porins are composed of 46:gram-negative bacterium 3798:Transmembrane proteins 1462:Molecular Microbiology 1033:10.1006/jsbi.1997.3946 890:/Invasin (Int/Inv) or 872:Porin P1 (CPP1) Family 853:Corynebacterial porins 714:gram-negative bacteria 614:gram-positive bacteria 598:gram-negative bacteria 544: 483: 346:(β sheets) made up of 313:gram-negative bacteria 59: 41:Salmonella typhimurium 1955:Constitutively active 1257:10.1074/jbc.272.2.992 937:Porin Superfamily III 791:Alginate export porin 676:, and an increase in 674:antibiotic resistance 644:Antibiotic resistance 555:X-ray crystallography 545: 484: 33: 842:Campylobacter jejuni 634:Endosymbiotic theory 499: 432: 368:antiparallel fashion 303:, i.e., they act as 38:specific porin from 3722:By gating mechanism 1109:2004Sci...303.1189F 930:Mycobacterial porin 878:Porin (PorT) Family 829:Mycobacterial porin 724:Porin Superfamily I 65:Gram-negative porin 3249:TRP cation channel 3147:CNG cation channel 2430:Tandem pore domain 1641:Ryanodine receptor 1409:"The porinologist" 654:signaling pathways 540: 479: 60: 3785: 3784: 3769: 3768: 3765: 3764: 3757:Stretch-activated 3734:Ion channel class 3711: 3710: 3707: 3706: 2896: 2895: 2892: 2891: 2168:Calcium-activated 2156:Potassium channel 2142: 2141: 2138: 2137: 1930: 1929: 1926: 1925: 1393:978-3-642-74541-6 1217:978-3-527-30775-3 1103:(5661): 1189–92. 892:Autotransporter-3 785:Autotransporter-1 538: 477: 354:(β turns) on the 301:passive diffusion 285:cellular membrane 271: 270: 267: 266: 262:structure summary 87:Porin_08134891516 16:(Redirected from 3810: 3730: 3717: 2925:Chloride channel 2915: 2902: 2295:Inward-rectifier 2164: 2148: 1952: 1936: 1906:Two-pore channel 1609: 1593: 1569: 1562: 1555: 1546: 1537: 1536: 1526: 1502: 1496: 1495: 1477: 1453: 1447: 1446: 1436: 1404: 1398: 1397: 1371: 1358: 1357: 1329: 1314: 1313: 1285: 1270: 1269: 1259: 1235: 1222: 1221: 1203: 1197: 1196: 1186: 1154: 1137: 1136: 1092: 1086: 1085: 1075: 1051: 1045: 1044: 1016: 1010: 1000: 579:nuclear envelope 549: 547: 546: 541: 539: 537: 529: 521: 488: 486: 485: 480: 478: 476: 456: 448: 415:Hydrogen bonding 409:All porins form 397:; however, some 210: 74: 62: 57: 21: 3818: 3817: 3813: 3812: 3811: 3809: 3808: 3807: 3788: 3787: 3786: 3781: 3761: 3724: 3703: 3552: 3451: 3441: 3237: 3135: 3111: 2909: 2888: 2802: 2679: 2536: 2519: 2424: 2388: 2358: 2314: 2306: 2289: 2243: 2158: 2134: 2107: 2046: 2029: 1988: 1946: 1922: 1805: 1777: 1764: 1751: 1731: 1718: 1683: 1662: 1603: 1601:Calcium channel 1587: 1573: 1542: 1540: 1517:(22): 3687–91. 1504: 1503: 1499: 1455: 1454: 1450: 1406: 1405: 1401: 1394: 1373: 1372: 1361: 1331: 1330: 1317: 1287: 1286: 1273: 1237: 1236: 1225: 1218: 1205: 1204: 1200: 1156: 1155: 1140: 1094: 1093: 1089: 1066:(1–2): 250–63. 1053: 1052: 1048: 1018: 1017: 1013: 1001: 997: 993: 976: 968: 957: 955: 949: 942: 939: 932: 926: 919: 917: 915: 913: 911: 909: 907: 905: 903: 901: 899: 897: 895: 885: 879: 873: 867: 865: 860: 855: 850: 848: 846: 838: 836: 831: 826: 824: 822: 817: 815: 813: 808: 803: 801: 799: 794: 788: 782: 780: 775: 770: 765: 759: 754: 748: 740: 734: 732: 726: 698: 690: 678:mortality rates 662:immune response 652:, resulting in 646: 610: 567: 530: 522: 497: 496: 457: 449: 430: 429: 340: 295:. Unlike other 174:OPM superfamily 49: 28: 23: 22: 15: 12: 11: 5: 3816: 3814: 3806: 3805: 3800: 3790: 3789: 3783: 3782: 3774: 3771: 3770: 3767: 3766: 3763: 3762: 3760: 3759: 3754: 3749: 3744: 3738: 3736: 3726: 3725: 3720: 3713: 3712: 3709: 3708: 3705: 3704: 3702: 3701: 3696: 3695: 3694: 3693: 3692: 3687: 3682: 3674: 3673: 3672: 3667: 3662: 3654: 3653: 3652: 3647: 3642: 3637: 3632: 3627: 3622: 3614: 3613: 3612: 3607: 3602: 3597: 3592: 3587: 3582: 3568: 3566: 3554: 3553: 3551: 3550: 3545: 3544: 3543: 3538: 3533: 3523: 3522: 3521: 3516: 3511: 3506: 3501: 3496: 3491: 3486: 3481: 3476: 3465: 3463: 3449: 3443: 3442: 3440: 3439: 3438: 3437: 3432: 3427: 3422: 3417: 3412: 3402: 3401: 3400: 3395: 3385: 3380: 3379: 3378: 3373: 3368: 3358: 3357: 3356: 3351: 3346: 3341: 3336: 3331: 3326: 3321: 3311: 3310: 3309: 3304: 3299: 3294: 3289: 3284: 3279: 3274: 3264: 3253: 3251: 3239: 3238: 3236: 3235: 3234: 3233: 3228: 3223: 3218: 3213: 3201: 3200: 3199: 3194: 3189: 3179: 3178: 3177: 3172: 3167: 3162: 3151: 3149: 3137: 3136: 3134: 3133: 3127: 3125: 3123:Proton channel 3113: 3112: 3110: 3109: 3108: 3107: 3102: 3092: 3091: 3090: 3085: 3080: 3075: 3070: 3065: 3060: 3050: 3049: 3048: 3043: 3038: 3033: 3028: 3023: 3018: 3013: 3008: 2998: 2993: 2992: 2991: 2990: 2989: 2984: 2979: 2974: 2964: 2963: 2962: 2957: 2947: 2946: 2945: 2929: 2927: 2911: 2910: 2905: 2898: 2897: 2894: 2893: 2890: 2889: 2887: 2886: 2881: 2880: 2879: 2874: 2869: 2859: 2854: 2849: 2848: 2847: 2842: 2837: 2832: 2822: 2821: 2820: 2815: 2810: 2800: 2795: 2794: 2793: 2792: 2787: 2782: 2775: 2774: 2773: 2768: 2763: 2756: 2755: 2754: 2749: 2742: 2741: 2740: 2735: 2730: 2723: 2722: 2721: 2716: 2709: 2708: 2707: 2702: 2697: 2692: 2687: 2677: 2672: 2671: 2670: 2669: 2664: 2659: 2654: 2647: 2646: 2645: 2638: 2637: 2636: 2631: 2626: 2619: 2618: 2617: 2612: 2607: 2602: 2595: 2594: 2593: 2588: 2581: 2580: 2579: 2574: 2569: 2564: 2559: 2554: 2549: 2544: 2534: 2529: 2527: 2521: 2520: 2518: 2517: 2516: 2515: 2510: 2505: 2500: 2495: 2490: 2485: 2480: 2475: 2470: 2465: 2460: 2455: 2450: 2445: 2434: 2432: 2426: 2425: 2423: 2422: 2421: 2420: 2415: 2410: 2405: 2400: 2395: 2386: 2382: 2381: 2380: 2375: 2370: 2365: 2356: 2348: 2347: 2346: 2341: 2336: 2331: 2326: 2321: 2312: 2308: 2304: 2299: 2297: 2291: 2290: 2288: 2287: 2286: 2285: 2280: 2275: 2270: 2265: 2260: 2255: 2250: 2241: 2237: 2236: 2235: 2227: 2226: 2225: 2220: 2215: 2205: 2204: 2203: 2198: 2193: 2188: 2183: 2172: 2170: 2160: 2159: 2151: 2144: 2143: 2140: 2139: 2136: 2135: 2133: 2132: 2131: 2130: 2125: 2120: 2115: 2105: 2101: 2100: 2099: 2094: 2089: 2084: 2079: 2074: 2069: 2064: 2059: 2054: 2044: 2039: 2037: 2031: 2030: 2028: 2027: 2026: 2025: 2020: 2015: 2010: 1999: 1997: 1990: 1989: 1987: 1986: 1985: 1984: 1979: 1974: 1969: 1958: 1956: 1948: 1947: 1944:Sodium channel 1939: 1932: 1931: 1928: 1927: 1924: 1923: 1921: 1920: 1919: 1918: 1913: 1903: 1902: 1901: 1896: 1891: 1886: 1875: 1874: 1873: 1872: 1867: 1862: 1857: 1847: 1846: 1845: 1840: 1835: 1830: 1820: 1819: 1818: 1813: 1803: 1798: 1797: 1796: 1795: 1790: 1785: 1775: 1767: 1762: 1754: 1749: 1741: 1740: 1739: 1729: 1721: 1716: 1708: 1707: 1706: 1701: 1696: 1691: 1681: 1672: 1670: 1664: 1663: 1661: 1660: 1659: 1658: 1653: 1648: 1638: 1637: 1636: 1631: 1626: 1615: 1613: 1605: 1604: 1596: 1589: 1588: 1574: 1572: 1571: 1564: 1557: 1549: 1539: 1538: 1497: 1468:(5): 1167–77. 1448: 1419:(24): 8232–6. 1399: 1392: 1359: 1315: 1271: 1223: 1216: 1198: 1138: 1087: 1046: 1011: 994: 992: 989: 988: 987: 982: 975: 972: 967: 964: 948: 945: 938: 935: 925: 922: 725: 722: 718:Actinomycetota 710:trans-membrane 697: 696:Classification 694: 689: 686: 645: 642: 609: 606: 566: 565:Cellular roles 563: 551: 550: 536: 533: 528: 525: 519: 516: 513: 510: 507: 504: 490: 489: 475: 472: 469: 466: 463: 460: 455: 452: 446: 443: 440: 437: 383:outer membrane 358:side and long 339: 336: 309:outer membrane 269: 268: 265: 264: 259: 253: 252: 239: 233: 232: 222: 215: 214: 206: 205: 200: 194: 193: 188: 182: 181: 176: 170: 169: 164: 158: 157: 144: 138: 137: 132: 126: 125: 120: 114: 113: 108: 101: 100: 95: 89: 88: 85: 81: 80: 76: 75: 67: 66: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 3815: 3804: 3801: 3799: 3796: 3795: 3793: 3780: 3779: 3772: 3758: 3755: 3753: 3752:Voltage-gated 3750: 3748: 3745: 3743: 3740: 3739: 3737: 3735: 3731: 3727: 3723: 3718: 3714: 3700: 3697: 3691: 3688: 3686: 3683: 3681: 3678: 3677: 3675: 3671: 3668: 3666: 3663: 3661: 3658: 3657: 3655: 3651: 3648: 3646: 3643: 3641: 3638: 3636: 3633: 3631: 3628: 3626: 3623: 3621: 3618: 3617: 3615: 3611: 3608: 3606: 3603: 3601: 3598: 3596: 3593: 3591: 3588: 3586: 3583: 3581: 3578: 3577: 3575: 3574: 3573: 3570: 3569: 3567: 3565: 3562: 3560: 3555: 3549: 3546: 3542: 3539: 3537: 3534: 3532: 3529: 3528: 3527: 3524: 3520: 3517: 3515: 3512: 3510: 3507: 3505: 3502: 3500: 3497: 3495: 3492: 3490: 3487: 3485: 3482: 3480: 3477: 3475: 3472: 3471: 3470: 3467: 3466: 3464: 3462: 3459: 3457: 3453: 3444: 3436: 3433: 3431: 3428: 3426: 3423: 3421: 3418: 3416: 3413: 3411: 3408: 3407: 3406: 3403: 3399: 3396: 3394: 3391: 3390: 3389: 3386: 3384: 3381: 3377: 3374: 3372: 3369: 3367: 3364: 3363: 3362: 3359: 3355: 3352: 3350: 3347: 3345: 3342: 3340: 3337: 3335: 3332: 3330: 3327: 3325: 3322: 3320: 3317: 3316: 3315: 3312: 3308: 3305: 3303: 3300: 3298: 3295: 3293: 3290: 3288: 3285: 3283: 3280: 3278: 3275: 3273: 3270: 3269: 3268: 3265: 3262: 3258: 3255: 3254: 3252: 3250: 3247: 3245: 3240: 3232: 3229: 3227: 3224: 3222: 3219: 3217: 3214: 3212: 3209: 3208: 3207: 3206: 3202: 3198: 3195: 3193: 3190: 3188: 3185: 3184: 3183: 3180: 3176: 3173: 3171: 3168: 3166: 3163: 3161: 3158: 3157: 3156: 3153: 3152: 3150: 3148: 3145: 3143: 3138: 3132: 3129: 3128: 3126: 3124: 3121: 3119: 3114: 3106: 3103: 3101: 3098: 3097: 3096: 3093: 3089: 3086: 3084: 3081: 3079: 3076: 3074: 3071: 3069: 3066: 3064: 3061: 3059: 3056: 3055: 3054: 3051: 3047: 3044: 3042: 3039: 3037: 3034: 3032: 3029: 3027: 3024: 3022: 3019: 3017: 3014: 3012: 3009: 3007: 3004: 3003: 3002: 2999: 2997: 2994: 2988: 2985: 2983: 2980: 2978: 2975: 2973: 2970: 2969: 2968: 2965: 2961: 2958: 2956: 2953: 2952: 2951: 2948: 2944: 2941: 2940: 2939: 2936: 2935: 2934: 2931: 2930: 2928: 2926: 2923: 2921: 2916: 2912: 2908: 2907:Miscellaneous 2903: 2899: 2885: 2884:Shaker (gene) 2882: 2878: 2875: 2873: 2870: 2868: 2865: 2864: 2863: 2860: 2858: 2857:minK/ISK-like 2855: 2853: 2850: 2846: 2843: 2841: 2838: 2836: 2833: 2831: 2828: 2827: 2826: 2823: 2819: 2816: 2814: 2811: 2809: 2806: 2805: 2804: 2797: 2796: 2791: 2788: 2786: 2783: 2781: 2778: 2777: 2776: 2772: 2769: 2767: 2764: 2762: 2759: 2758: 2757: 2753: 2750: 2748: 2745: 2744: 2743: 2739: 2736: 2734: 2731: 2729: 2726: 2725: 2724: 2720: 2717: 2715: 2712: 2711: 2710: 2706: 2703: 2701: 2698: 2696: 2693: 2691: 2688: 2686: 2683: 2682: 2681: 2674: 2673: 2668: 2665: 2663: 2660: 2658: 2655: 2653: 2650: 2649: 2648: 2644: 2641: 2640: 2639: 2635: 2632: 2630: 2627: 2625: 2622: 2621: 2620: 2616: 2613: 2611: 2608: 2606: 2603: 2601: 2598: 2597: 2596: 2592: 2589: 2587: 2584: 2583: 2582: 2578: 2575: 2573: 2570: 2568: 2565: 2563: 2560: 2558: 2555: 2553: 2550: 2548: 2545: 2543: 2540: 2539: 2538: 2531: 2530: 2528: 2526: 2525:Voltage-gated 2522: 2514: 2511: 2509: 2506: 2504: 2501: 2499: 2496: 2494: 2491: 2489: 2486: 2484: 2481: 2479: 2476: 2474: 2471: 2469: 2466: 2464: 2461: 2459: 2456: 2454: 2451: 2449: 2446: 2444: 2441: 2440: 2439: 2436: 2435: 2433: 2431: 2427: 2419: 2416: 2414: 2411: 2409: 2406: 2404: 2401: 2399: 2396: 2394: 2391: 2390: 2389: 2383: 2379: 2376: 2374: 2371: 2369: 2366: 2364: 2361: 2360: 2359: 2352: 2349: 2345: 2342: 2340: 2337: 2335: 2332: 2330: 2327: 2325: 2322: 2320: 2317: 2316: 2315: 2309: 2307: 2301: 2300: 2298: 2296: 2292: 2284: 2281: 2279: 2276: 2274: 2271: 2269: 2266: 2264: 2261: 2259: 2256: 2254: 2251: 2249: 2246: 2245: 2244: 2238: 2234: 2231: 2230: 2228: 2224: 2221: 2219: 2216: 2214: 2211: 2210: 2209: 2206: 2202: 2199: 2197: 2194: 2192: 2189: 2187: 2184: 2182: 2179: 2178: 2177: 2174: 2173: 2171: 2169: 2165: 2161: 2157: 2154: 2149: 2145: 2129: 2126: 2124: 2121: 2119: 2116: 2114: 2111: 2110: 2109: 2102: 2098: 2095: 2093: 2090: 2088: 2085: 2083: 2080: 2078: 2075: 2073: 2070: 2068: 2065: 2063: 2060: 2058: 2055: 2053: 2050: 2049: 2048: 2041: 2040: 2038: 2036: 2035:Voltage-gated 2032: 2024: 2021: 2019: 2016: 2014: 2011: 2009: 2006: 2005: 2004: 2001: 2000: 1998: 1995: 1991: 1983: 1980: 1978: 1975: 1973: 1970: 1968: 1965: 1964: 1963: 1960: 1959: 1957: 1953: 1949: 1945: 1942: 1937: 1933: 1917: 1914: 1912: 1909: 1908: 1907: 1904: 1900: 1897: 1895: 1892: 1890: 1887: 1885: 1882: 1881: 1880: 1877: 1876: 1871: 1868: 1866: 1863: 1861: 1858: 1856: 1853: 1852: 1851: 1848: 1844: 1841: 1839: 1836: 1834: 1831: 1829: 1826: 1825: 1824: 1821: 1817: 1814: 1812: 1809: 1808: 1807: 1800: 1799: 1794: 1791: 1789: 1786: 1784: 1781: 1780: 1779: 1771: 1768: 1766: 1758: 1755: 1753: 1745: 1742: 1738: 1735: 1734: 1733: 1725: 1722: 1720: 1712: 1709: 1705: 1702: 1700: 1697: 1695: 1692: 1690: 1687: 1686: 1685: 1677: 1674: 1673: 1671: 1669: 1668:Voltage-gated 1665: 1657: 1654: 1652: 1649: 1647: 1644: 1643: 1642: 1639: 1635: 1632: 1630: 1627: 1625: 1622: 1621: 1620: 1617: 1616: 1614: 1610: 1606: 1602: 1599: 1594: 1590: 1585: 1581: 1577: 1570: 1565: 1563: 1558: 1556: 1551: 1550: 1547: 1543: 1534: 1530: 1525: 1520: 1516: 1512: 1508: 1501: 1498: 1493: 1489: 1485: 1481: 1476: 1471: 1467: 1463: 1459: 1452: 1449: 1444: 1440: 1435: 1430: 1426: 1422: 1418: 1414: 1410: 1403: 1400: 1395: 1389: 1385: 1381: 1377: 1370: 1368: 1366: 1364: 1360: 1355: 1351: 1347: 1343: 1340:(1–2): 6–31. 1339: 1335: 1328: 1326: 1324: 1322: 1320: 1316: 1311: 1307: 1303: 1299: 1295: 1291: 1284: 1282: 1280: 1278: 1276: 1272: 1267: 1263: 1258: 1253: 1249: 1245: 1241: 1234: 1232: 1230: 1228: 1224: 1219: 1213: 1209: 1202: 1199: 1194: 1190: 1185: 1180: 1176: 1172: 1169:(8): 843–54. 1168: 1164: 1160: 1153: 1151: 1149: 1147: 1145: 1143: 1139: 1134: 1130: 1126: 1122: 1118: 1114: 1110: 1106: 1102: 1098: 1091: 1088: 1083: 1079: 1074: 1069: 1065: 1061: 1057: 1050: 1047: 1042: 1038: 1034: 1030: 1026: 1022: 1015: 1012: 1008: 1004: 999: 996: 990: 986: 983: 981: 978: 977: 973: 971: 965: 963: 962:(MPT) Family 961: 952: 946: 944: 936: 934: 931: 923: 921: 893: 889: 883: 880:1.B.49 - The 877: 871: 868:1.B.43 - The 864: 859: 854: 844: 843: 835: 830: 821: 812: 807: 798: 792: 787:(AT-1) family 786: 779: 774: 769: 763: 758: 752: 746: 745: 738: 731: 723: 721: 719: 715: 711: 707: 706:superfamilies 703: 700:According to 695: 693: 687: 685: 683: 679: 675: 670: 665: 663: 659: 655: 651: 643: 641: 637: 635: 631: 627: 622: 620: 615: 607: 605: 603: 599: 594: 590: 587: 582: 580: 576: 575:nuclear pores 572: 564: 562: 560: 556: 534: 531: 526: 523: 517: 511: 505: 502: 495: 494: 493: 470: 464: 461: 458: 453: 450: 444: 441: 438: 435: 428: 427: 426: 422: 420: 416: 412: 407: 404: 400: 396: 390: 388: 384: 380: 377: 373: 369: 365: 361: 357: 353: 349: 345: 337: 335: 333: 329: 325: 324:actinomycetes 321: 318: 317:gram-positive 314: 310: 306: 302: 298: 294: 290: 286: 283:that cross a 282: 279: 275: 263: 260: 258: 254: 251: 247: 243: 240: 238: 234: 230: 226: 223: 220: 216: 211: 207: 204: 201: 199: 195: 192: 189: 187: 183: 180: 177: 175: 171: 168: 165: 163: 159: 156: 152: 148: 145: 143: 139: 136: 133: 131: 127: 124: 121: 119: 115: 112: 109: 106: 102: 99: 96: 94: 90: 86: 82: 77: 73: 68: 63: 56: 52: 47: 43: 42: 37: 32: 19: 3775: 3742:Ligand-gated 3733: 3721: 3564:Gap junction 3557: 3460: 3446: 3242: 3203: 3181: 3154: 3140: 3116: 3094: 3052: 3000: 2966: 2949: 2937: 2918: 2906: 2861: 2824: 2798: 2675: 2532: 2437: 2384: 2354: 2310: 2239: 2152: 2103: 2042: 1940: 1849: 1822: 1801: 1773: 1760: 1747: 1727: 1714: 1679: 1612:Ligand-gated 1597: 1580:ion channels 1541: 1514: 1511:FEBS Letters 1510: 1500: 1465: 1461: 1451: 1416: 1412: 1402: 1375: 1337: 1333: 1293: 1289: 1250:(2): 992–5. 1247: 1243: 1207: 1201: 1166: 1162: 1100: 1096: 1090: 1063: 1059: 1049: 1027:(2): 101–9. 1024: 1020: 1014: 998: 969: 958:3.A.8 - The 953: 950: 940: 927: 881: 875: 869: 840: 793:(AEP) family 761: 750: 749:1.B.5 - The 747:(BRP) Family 742: 741:1.B.4 - The 735:1.B.3 - The 728:1.B.1 - The 727: 699: 691: 666: 650:immune cells 647: 638: 630:chloroplasts 626:mitochondria 623: 611: 595: 591: 583: 568: 552: 491: 423: 408: 391: 348:beta strands 341: 328:mitochondria 320:mycobacteria 273: 272: 39: 3747:Light-gated 2229:IK channel 1296:(1): 3–15. 762:Rhodobacter 751:Pseudomonas 739:(SP) Family 737:Sugar porin 658:antibiotics 586:hydrophilic 571:nucleoporin 411:homotrimers 372:beta barrel 364:amino acids 356:cytoplasmic 344:beta sheets 278:beta barrel 186:OPM protein 79:Identifiers 3792:Categories 2950:Bestrophin 2208:SK channel 2176:BK channel 1850:γ-subunits 1823:β-subunits 1806:δ-subunits 991:References 682:infections 619:cell walls 352:beta turns 330:, and the 225:structures 3778:disorders 3776:see also 3559:Cytoplasm 3469:Aquaporin 2938:Anoctamin 2761:11.1/hERG 985:Aquaporin 928:1.B.24 - 886:1.B.54 - 882:Anaplasma 688:Discovery 669:mutations 608:Diversity 512:α 506:⁡ 471:α 465:⁡ 439:π 403:octameric 338:Structure 315:and some 289:molecules 135:PDOC00498 123:IPR001702 3572:Connexin 2852:minK/ISK 1533:24100136 1492:24683050 1484:12940978 1443:16321927 1354:11988218 1310:34974997 1193:23305369 1133:30437731 1125:14976314 1082:15519319 974:See also 870:Coxiella 755:1.B.6 - 395:monomers 376:nonpolar 305:channels 281:proteins 242:RCSB PDB 118:InterPro 58:​ 3699:Innexin 3456:solutes 1434:1317029 1266:8995393 1184:3706956 1105:Bibcode 1097:Science 1041:9615433 894:family 888:Intimin 861:1.B.39 856:1.B.35 851:1.B.34 839:1.B.31 832:1.B.25 827:1.B.24 818:1.B.21 809:1.B.18 804:1.B.17 795:1.B.14 789:1.B.13 783:1.B.12 776:1.B.10 602:daltons 577:in the 399:dimeric 387:aqueous 293:diffuse 203:cd01345 130:PROSITE 98:PF00267 36:sucrose 1996:-gated 1994:Proton 1770:T-type 1757:R-type 1744:Q-type 1724:P-type 1711:N-type 1676:L-type 1531:  1490:  1482:  1441:  1431:  1390:  1352:  1308:  1264:  1214:  1191:  1181:  1131:  1123:  1080:  1039:  1009:(MeSH) 1003:Porins 771:1.B.9 766:1.B.8 760:1.B.7 379:lipids 274:Porins 257:PDBsum 231:  221:  155:SUPFAM 111:CL0193 84:Symbol 18:Porins 3610:GJA10 3461:Porin 3361:TRPML 3131:HVCN1 2825:KCNIP 2680:α7-12 1584:TC 1A 1488:S2CID 1306:S2CID 1129:S2CID 680:from 492:and, 360:loops 167:1.B.1 151:SCOPe 142:SCOP2 3690:GJD4 3685:GJD3 3680:GJD2 3670:GJC3 3665:GJC2 3660:GJC1 3650:GJB7 3645:GJB6 3640:GJB5 3635:GJB4 3630:GJB3 3625:GJB2 3620:GJB1 3605:GJA9 3600:GJA8 3595:GJA5 3590:GJA4 3585:GJA3 3580:GJA1 3405:TRPV 3388:TRPP 3383:TRPN 3314:TRPM 3267:TRPC 3257:TRPA 3095:CLNS 3053:CLIC 3001:CLCN 2996:CFTR 2943:ANO1 2862:MiRP 2790:12.3 2785:12.2 2780:12.1 2771:11.3 2766:11.2 2752:10.2 2747:10.1 2537:α1-6 2351:GIRK 1765:α2.3 1752:α2.1 1719:α2.2 1529:PMID 1480:PMID 1439:PMID 1388:ISBN 1350:PMID 1338:1562 1262:PMID 1212:ISBN 1189:PMID 1121:PMID 1078:PMID 1064:1666 1037:PMID 702:TCDB 628:and 617:the 417:and 291:can 276:are 250:PDBj 246:PDBe 229:ECOD 219:Pfam 191:1pho 162:TCDB 147:1mpf 107:clan 105:Pfam 93:Pfam 55:1A0S 44:, a 3454:(+ 3292:4AP 3205:HCN 2738:9.3 2733:9.2 2728:9.1 2719:8.2 2714:8.1 2705:7.5 2700:7.4 2695:7.3 2690:7.2 2685:7.1 2667:6.4 2662:6.3 2657:6.2 2652:6.1 2643:5.1 2634:4.3 2629:4.2 2624:4.1 2615:3.4 2610:3.3 2605:3.2 2600:3.1 2591:2.2 2586:2.1 2577:1.8 2572:1.7 2567:1.6 2562:1.5 2557:1.4 2552:1.3 2547:1.2 2542:1.1 2438:K2P 2418:7.1 2413:6.2 2408:6.1 2403:5.1 2398:4.2 2393:4.1 2378:3.4 2373:3.3 2368:3.2 2363:3.1 2344:2.6 2339:2.4 2334:2.3 2329:2.2 2324:2.1 2319:1.1 2305:ATP 2283:5.1 2278:4.2 2273:4.1 2268:3.1 2263:2.3 2258:2.2 2253:2.1 2248:1.1 2233:IK1 2223:SK3 2218:SK2 2213:SK1 2092:1.9 2087:1.8 2082:1.7 2077:1.6 2072:1.5 2067:1.4 2062:1.3 2057:1.2 2052:1.1 1941:Na: 1793:3.3 1788:3.2 1783:3.1 1737:2.1 1704:1.4 1699:1.3 1694:1.2 1689:1.1 1598:Ca: 1519:doi 1515:587 1470:doi 1429:PMC 1421:doi 1417:187 1380:doi 1342:doi 1298:doi 1252:doi 1248:272 1179:PMC 1171:doi 1113:doi 1101:303 1068:doi 1029:doi 1025:121 596:In 503:tan 462:cos 381:of 362:of 311:of 237:PDB 198:CDD 51:PDB 3794:: 3676:D 3656:C 3616:B 3576:A 3458:): 3211:FC 3105:1B 3100:1A 3088:L1 3046:KB 3041:KA 2920:Cl 2513:18 2508:17 2503:16 2498:15 2493:13 2488:12 2483:10 2387:ir 2357:ir 2313:ir 2242:Ca 2201:β4 2196:β3 2191:β2 2186:β1 2181:α1 2153:K: 2104:Na 2097:7A 2043:Na 1870:γ4 1865:γ3 1860:γ2 1855:γ1 1843:β4 1838:β3 1833:β2 1828:β1 1774:Ca 1761:Ca 1748:Ca 1728:Ca 1715:Ca 1680:Ca 1578:: 1527:. 1513:. 1509:. 1486:. 1478:. 1466:49 1464:. 1460:. 1437:. 1427:. 1415:. 1411:. 1386:. 1362:^ 1348:. 1336:. 1318:^ 1304:. 1292:. 1274:^ 1260:. 1246:. 1242:. 1226:^ 1187:. 1177:. 1167:13 1165:. 1161:. 1141:^ 1127:. 1119:. 1111:. 1099:. 1076:. 1062:. 1058:. 1035:. 1023:. 684:. 621:. 581:. 248:; 244:; 227:/ 179:31 153:/ 149:/ 53:: 48:. 34:A 3561:: 3541:3 3536:2 3531:1 3519:9 3514:8 3509:7 3504:6 3499:5 3494:4 3489:3 3484:2 3479:1 3474:0 3452:O 3450:2 3448:H 3435:6 3430:5 3425:4 3420:3 3415:2 3410:1 3398:2 3393:1 3376:3 3371:2 3366:1 3354:8 3349:7 3344:6 3339:5 3334:4 3329:3 3324:2 3319:1 3307:7 3302:6 3297:5 3287:4 3282:3 3277:2 3272:1 3263:) 3261:1 3259:( 3246:: 3244:M 3231:4 3226:3 3221:2 3216:1 3197:3 3192:2 3187:1 3182:β 3175:4 3170:3 3165:2 3160:1 3155:α 3144:: 3142:M 3120:: 3118:H 3083:6 3078:5 3073:4 3068:3 3063:2 3058:1 3036:7 3031:6 3026:5 3021:4 3016:3 3011:2 3006:1 2987:4 2982:3 2977:2 2972:1 2960:2 2955:1 2922:: 2877:3 2872:2 2867:1 2845:4 2840:3 2835:2 2830:1 2818:3 2813:2 2808:1 2803:β 2801:v 2799:K 2678:v 2676:K 2535:v 2533:K 2478:9 2473:7 2468:6 2463:5 2458:4 2453:3 2448:2 2443:1 2385:K 2355:K 2353:/ 2311:K 2303:K 2240:K 2128:4 2123:3 2118:2 2113:1 2108:β 2106:v 2047:α 2045:v 2023:4 2018:3 2013:2 2008:1 1982:δ 1977:γ 1972:β 1967:α 1916:2 1911:1 1899:4 1894:3 1889:2 1884:1 1816:2 1811:1 1804:2 1802:α 1778:α 1776:v 1772:/ 1763:v 1759:/ 1750:v 1746:/ 1732:α 1730:v 1726:/ 1717:v 1713:/ 1684:α 1682:v 1678:/ 1656:3 1651:2 1646:1 1634:3 1629:2 1624:1 1586:) 1582:( 1568:e 1561:t 1554:v 1535:. 1521:: 1494:. 1472:: 1445:. 1423:: 1396:. 1382:: 1356:. 1344:: 1312:. 1300:: 1294:3 1268:. 1254:: 1220:. 1195:. 1173:: 1135:. 1115:: 1107:: 1084:. 1070:: 1043:. 1031:: 535:b 532:n 527:a 524:S 518:= 515:) 509:( 474:) 468:( 459:2 454:b 451:n 445:= 442:R 436:2 20:)

Index

Porins

sucrose
Salmonella typhimurium
gram-negative bacterium
PDB
1A0S

Pfam
PF00267
Pfam
CL0193
InterPro
IPR001702
PROSITE
PDOC00498
SCOP2
1mpf
SCOPe
SUPFAM
TCDB
1.B.1
OPM superfamily
31
OPM protein
1pho
CDD
cd01345
Pfam
structures

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