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Pectinesterase

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plants. Pectinesterase isoforms are encoded by a family of genes, some of which are constitutively expressed throughout the plant, whereas others are differentially expressed in specific tissues and at different developmental stages. Isoforms of pectinesterase differ in various biochemical parameters
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Pectinesterase is thought to be secreted to the apoplasm with highly methylated pectin although at some point along this secretory pathway the N-terminal pro-peptide is cleaved off. Currently, the role of the pro-region is unknown although it has been hypothesised that it may act as an intramolecular
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Recently, particular attention has been devoted to molecular studies of pectinesterase leading to the characterisation of several related isoforms in various higher plant species. Some of these pectinesterases were shown to be ubiquitously expressed, whereas others are specifically expressed during
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interactions. Pectinesterases can however display acidic isoelectric points as detected in soluble fractions of plant tissues. Until recently, it was generally assumed that plant pectinesterases remove methyl esters in a progressive block-wise fashion, giving rise to long contiguous stretches of
397:, methylesterified in the medial Golgi and substituted with side chains in the trans Golgi cisternae. Pectin biochemistry can be rather complicated but put simply, the pectin backbone comprises 3 types of polymer: homogalacturonan (HGA); rhamnogalacturonan I (RGI); rhamnogalacturonan II (RGII). 29: 743:
Prokaryotic and eukaryotic pectinesterases share a few regions of sequence similarity. The crystal structure of pectinesterase from Erwinia chrysanthemi revealed a beta-helix structure similar to that found in pectinolytic enzymes, though it is different from most structures of esterases. The
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Homogalacturonan is highly methyl-esterified when exported into cell walls and is subsequently de-esterified by the action of pectinesterase and other pectic enzymes. Pectinesterase catalyses the de-esterification of methyl-esterified D-galactosiduronic acid units in pectic compounds yielding
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fruit ripening, germination of the pollen grain, or stem elongation. Such data suggests that pectinesterases are encoded by a family of genes that are differentially regulated in cell type in response to specific developmental or environmental cues.
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Pectinesterase action on the components of the plant cell wall can produce two diametrically opposite effects. The first being a contribution to the stiffening of the cell wall by producing blocks of unesterified
308:. Pectin is one of the main components of the plant cell wall. In plants, pectinesterase plays an important role in cell wall metabolism during fruit ripening. In plant bacterial pathogens such as 320:, pectinesterase is involved in maceration and soft-rotting of plant tissue. Plant pectinesterases are regulated by pectinesterase inhibitors, which are ineffective against microbial enzymes. 920:
Pickersgill RW, Smith D, Jenkins J, Mayans O, Worboys K (2001). "Three-dimensional structure of Erwinia chrysanthemi pectin methylesterase reveals a novel esterase active site".
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catalytic region is highly conserved and constitutes the mature enzyme. The first three-dimensional structure solved for a plant pectinesterase was for an isoform from
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Spatial and temporal regulation of pectinesterase activity during plant development is based on a large family of isoforms. Recently, the systematic sequencing of the
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can influence numerous physiological processes. In plants, pectinesterase plays a role in the modulation of cell wall mechanical stability during
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The N-terminal pro-peptides of pectinesterase are variable in size and sequence and show a low level of amino acid identity. Alternatively the
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putative catalytic residues are in a similar location to those of the active site and substrate-binding cleft of pectate lyase.
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Giovane A, Tsernoglou D, Camardella L, Di Matteo A, Raiola A, Bonivento D, De Lorenzo G, Cervone F, Bellincampi D (2005).
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Most of the purified plant pectinesterases have neutral or alkaline isoelectric points and are bound to the cell wall via
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movement protein and it has been shown that this interaction is required for cell-to-cell translocation of the virus.
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such as relative molecular mass, isoelectric point, optimum pH, substrate affinity, ion-requirement and location.
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domain and a pectin binding cleft. Similarly several pectinesterase structures have been elucidated in fungi and
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chaperone, ensuring correct folding or deactivating activity until PE insertion in the cell wall is complete.
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that facilitate plant cell wall modification and subsequent breakdown. It catalyzes the following reaction:
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that are annotated as pectinesterases, most of which are encoded as large pre-proproteins. The signal
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yield and root development. Pectinesterase has also been shown to play a role in a plants response to
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in the mature protein, although at least one site is present in the amino-terminal extension region.
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forming a pectate gel. The other being that proton release may stimulate the activity of cell wall
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Johansson K, El-Ahmad M, Friemann R, Jörnvall H, Markovic O, Eklund H (March 2002).
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Fries, M.; Ihrig, J.; Brocklehurst, K.; Shevchik, V. E.; Pickersgill, R. W. (2007).
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may exhibit both mechanisms and that such mechanisms are driven by alterations in
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possessing a signal sequence and a large amino-terminal extension of around 22
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sites and it is thought that these sites also play a role in targeting.
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substrates for depolymerising enzymes, particularly acidic pectins and
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Recent studies have shown that the manipulation of pectinesterase
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of the cell wall resulting in alterations in cell wall integrity.
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un-esterified GalA residues in homogalacturonan domains of
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and share most of the structural motifs seen in plants.
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pre-region is required for targeting the enzyme to the
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PE proteins are synthesised as pre-proteins of 540–580
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is involved in host cell receptor recognition for the
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and consists of about 25 amino acid residues. These
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It is found in all higher plants as well as in some
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They are polymerised in the cis 389:form approximately 35% of the dry weight of 466:genome has led to the identification of 66 1829: 1815: 1807: 1600: 1546: 1532: 991: 977: 969: 580: 192: 27: 961:at the U.S. National Library of Medicine 886: 835: 786: 2104: 1184:Ubiquitin carboxy-terminal hydrolase L1 753: 249:) is a ubiquitous cell-wall-associated 522: 18: 1764:either deoxy- or ribo-     378:contributing to cell wall loosening. 7: 1345:Protein serine/threonine phosphatase 1446:Cyclic nucleotide phosphodiesterase 1440:Clostridium perfringens alpha toxin 1241:Tartrate-resistant acid phosphatase 1289:Pyruvate dehydrogenase phosphatase 437:Molecular biology and biochemistry 14: 1189:4-hydroxybenzoyl-CoA thioesterase 433:is usually much lower than this. 2107: 314:and in fungal pathogens such as 37:in complex with hexasaccharide. 1507:N-acetylglucosamine-6-sulfatase 1395:Sphingomyelin phosphodiesterase 1316:Inositol-phosphate phosphatase 1179:Palmitoyl protein thioesterase 370:groups that can interact with 245:(EC 3.1.1.11; systematic name 1: 1679:RNA-induced silencing complex 888:10.1016/S0014-5793(02)02372-4 584:Available protein structures: 292:Pectinesterase catalyses the 1783:Serratia marcescens nuclease 1350:Dual-specificity phosphatase 1340:Protein tyrosine phosphatase 1260:Fructose 1,6-bisphosphatase 33:Pectin methylesterase from 2146: 1985:Michaelis–Menten kinetics 1497:Galactosamine-6 sulfatase 1053:6-phosphogluconolactonase 579: 526:Pectinesterase, catalytic 191: 26: 1877:Diffusion-limited enzyme 1245:Purple acid phosphatases 963:Medical Subject Headings 779:10.1038/sj.emboj.7601816 482:regions contain several 382:Esterification of pectin 1670:Microprocessor complex 1309:Beta-propeller phytase 934:10.1006/jmbi.2000.4324 828:10.1105/tpc.104.028886 253:that presents several 247:pectin pectylhydrolase 1970:Eadie–Hofstee diagram 1903:Allosteric regulation 1605:Endodeoxyribonuclease 1502:Iduronate-2-sulfatase 1255:Glucose 6-phosphatase 1041:Butyrylcholinesterase 476:endoplasmic reticulum 1980:Lineweaver–Burk plot 1788:Micrococcal nuclease 1623:Deoxyribonuclease IV 1618:Deoxyribonuclease II 1551:Exodeoxyribonuclease 1211:Alkaline phosphatase 1036:Acetylcholinesterase 463:Arabidopsis thaliana 360:tobacco mosaic virus 1643:UvrABC endonuclease 1613:Deoxyribonuclease I 1336:Protein phosphatase 1272:Protein phosphatase 1070:Bile salt-dependent 1058:PAF acetylhydrolase 468:open reading frames 451:consensus sequences 344:, stem elongation, 1939:Enzyme superfamily 1872:Enzyme promiscuity 1776:Mung bean nuclease 1635:Restriction enzyme 1628:Restriction enzyme 539:Pectinesterase_cat 311:Erwinia carotovora 273:methanol + pectate 2095: 2094: 1804: 1803: 1800: 1799: 1796: 1795: 1585: 1584: 1577:Oligonucleotidase 1522:deoxyribonuclease 1490:Steroid sulfatase 1365:Phosphodiesterase 1094:Hormone-sensitive 773:(17): 3879–3887. 711: 710: 707: 706: 633:structure summary 508:isoelectric point 355:Nicotiana tabacum 317:Aspergillus niger 294:de-esterification 240: 239: 236: 235: 139:metabolic pathway 2137: 2112: 2111: 2103: 1975:Hanes–Woolf plot 1918:Enzyme activator 1913:Enzyme inhibitor 1887:Enzyme catalysis 1831: 1824: 1817: 1808: 1653:Endoribonuclease 1639: 1633: 1601: 1547: 1533: 1233:Acid phosphatase 1114:Monoacylglycerol 1024:ester hydrolases 993: 986: 979: 970: 946: 945: 917: 907: 901: 900: 890: 866: 856: 850: 849: 839: 807: 801: 800: 790: 767:The EMBO Journal 758: 702: 696: 690: 684: 678: 672: 666: 660: 654: 648: 581: 523: 504:molecular weight 193: 45: 35:Dickeya dadantii 31: 19: 16:Class of enzymes 2145: 2144: 2140: 2139: 2138: 2136: 2135: 2134: 2120: 2119: 2118: 2106: 2098: 2096: 2091: 2003:Oxidoreductases 1989: 1965:Enzyme kinetics 1953: 1949:List of enzymes 1922: 1891: 1862:Catalytic triad 1840: 1835: 1805: 1792: 1759: 1647: 1637: 1631: 1594: 1581: 1569:Exoribonuclease 1563: 1540: 1524: 1520: 1511: 1485:Arylsulfatase L 1480:Arylsulfatase B 1475:Arylsulfatase A 1450: 1363: 1354: 1193: 1161: 1023: 1011: 997: 955: 950: 949: 919: 909: 908: 904: 868: 858: 857: 853: 809: 808: 804: 760: 759: 755: 750: 732:family CE-8, a 698: 692: 686: 680: 674: 668: 662: 656: 650: 644: 521: 500: 455:N-glycosylation 439: 384: 326: 268: 46: 41: 17: 12: 11: 5: 2143: 2141: 2133: 2132: 2122: 2121: 2117: 2116: 2093: 2092: 2090: 2089: 2076: 2063: 2050: 2037: 2024: 2011: 1997: 1995: 1991: 1990: 1988: 1987: 1982: 1977: 1972: 1967: 1961: 1959: 1955: 1954: 1952: 1951: 1946: 1941: 1936: 1930: 1928: 1927:Classification 1924: 1923: 1921: 1920: 1915: 1910: 1905: 1899: 1897: 1893: 1892: 1890: 1889: 1884: 1879: 1874: 1869: 1864: 1859: 1854: 1848: 1846: 1842: 1841: 1836: 1834: 1833: 1826: 1819: 1811: 1802: 1801: 1798: 1797: 1794: 1793: 1791: 1790: 1785: 1780: 1779: 1778: 1767: 1765: 1761: 1760: 1758: 1757: 1752: 1751: 1750: 1745: 1740: 1735: 1725: 1720: 1715: 1710: 1709: 1708: 1703: 1698: 1693: 1683: 1682: 1681: 1672: 1657: 1655: 1649: 1648: 1646: 1645: 1640: 1625: 1620: 1615: 1609: 1607: 1598: 1587: 1586: 1583: 1582: 1580: 1579: 1573: 1571: 1565: 1564: 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604: 603: 593: 586: 585: 577: 576: 571: 565: 564: 559: 553: 552: 547: 541: 540: 537: 533: 532: 528: 527: 520: 517: 512:dicotyledonous 499: 498:Plant isoforms 496: 438: 435: 383: 380: 334:fruit ripening 325: 322: 275: 274: 266: 243:Pectinesterase 238: 237: 234: 233: 228: 222: 221: 216: 210: 209: 204: 198: 197: 189: 188: 179: 173: 172: 161: 154: 153: 148: 142: 141: 136: 130: 129: 124: 118: 117: 112: 106: 105: 100: 94: 93: 88: 82: 81: 77: 76: 71: 65: 64: 59: 53: 52: 48: 47: 32: 24: 23: 22:pectinesterase 15: 13: 10: 9: 6: 4: 3: 2: 2142: 2131: 2128: 2127: 2125: 2115: 2110: 2105: 2101: 2087: 2083: 2082: 2077: 2074: 2070: 2069: 2064: 2061: 2057: 2056: 2051: 2048: 2044: 2043: 2038: 2035: 2031: 2030: 2025: 2022: 2018: 2017: 2012: 2009: 2005: 2004: 1999: 1998: 1996: 1992: 1986: 1983: 1981: 1978: 1976: 1973: 1971: 1968: 1966: 1963: 1962: 1960: 1956: 1950: 1947: 1945: 1944:Enzyme family 1942: 1940: 1937: 1935: 1932: 1931: 1929: 1925: 1919: 1916: 1914: 1911: 1909: 1908:Cooperativity 1906: 1904: 1901: 1900: 1898: 1894: 1888: 1885: 1883: 1880: 1878: 1875: 1873: 1870: 1868: 1867:Oxyanion hole 1865: 1863: 1860: 1858: 1855: 1853: 1850: 1849: 1847: 1843: 1839: 1832: 1827: 1825: 1820: 1818: 1813: 1812: 1809: 1789: 1786: 1784: 1781: 1777: 1774: 1773: 1772: 1769: 1768: 1766: 1762: 1756: 1753: 1749: 1746: 1744: 1741: 1739: 1736: 1734: 1731: 1730: 1729: 1726: 1724: 1721: 1719: 1716: 1714: 1711: 1707: 1704: 1702: 1699: 1697: 1694: 1692: 1689: 1688: 1687: 1684: 1680: 1676: 1673: 1671: 1667: 1664: 1663: 1662: 1659: 1658: 1656: 1654: 1650: 1644: 1641: 1636: 1629: 1626: 1624: 1621: 1619: 1616: 1614: 1611: 1610: 1608: 1606: 1602: 1599: 1597: 1592: 1588: 1578: 1575: 1574: 1572: 1570: 1566: 1560: 1557: 1556: 1554: 1552: 1548: 1545: 1543: 1538: 1534: 1531: 1528: 1523: 1518: 1514: 1508: 1505: 1503: 1500: 1498: 1495: 1491: 1488: 1486: 1483: 1481: 1478: 1476: 1473: 1472: 1471: 1470: 1469:arylsulfatase 1466: 1465: 1463: 1461: 1457: 1453: 1447: 1444: 1441: 1437: 1434: 1432: 1429: 1427: 1423: 1420: 1418: 1415: 1413: 1410: 1408: 1405: 1401: 1398: 1397: 1396: 1393: 1389: 1386: 1384: 1381: 1380: 1379: 1378:Phospholipase 1376: 1374: 1371: 1370: 1368: 1366: 1361: 1357: 1351: 1348: 1346: 1343: 1341: 1337: 1334: 1330: 1326: 1322: 1319: 1318: 1317: 1314: 1310: 1307: 1306: 1305: 1302: 1300: 1297: 1295: 1292: 1290: 1287: 1285: 1282: 1278: 1275: 1274: 1273: 1270: 1266: 1263: 1262: 1261: 1258: 1256: 1253: 1251: 1248: 1246: 1242: 1238: 1234: 1231: 1227: 1224: 1222: 1219: 1217: 1214: 1213: 1212: 1209: 1208: 1206: 1204: 1200: 1196: 1190: 1187: 1185: 1182: 1180: 1177: 1176: 1174: 1172: 1168: 1164: 1158: 1155: 1153: 1150: 1149: 1144: 1141: 1139: 1136: 1134: 1131: 1130: 1129: 1128:Phospholipase 1126: 1125: 1120: 1117: 1115: 1112: 1110: 1107: 1105: 1102: 1100: 1097: 1095: 1092: 1090: 1087: 1085: 1082: 1080: 1076: 1073: 1071: 1068: 1067: 1066: 1063: 1062: 1059: 1056: 1054: 1051: 1049: 1046: 1042: 1039: 1037: 1034: 1033: 1032: 1029: 1028: 1026: 1022: 1018: 1014: 1009: 1005: 1001: 994: 989: 987: 982: 980: 975: 974: 971: 964: 960: 957: 956: 952: 943: 939: 935: 931: 927: 923: 916: 912: 906: 903: 898: 894: 889: 884: 880: 876: 872: 865: 861: 855: 852: 847: 843: 838: 833: 829: 825: 821: 817: 813: 806: 803: 798: 794: 789: 784: 780: 776: 772: 768: 764: 757: 754: 747: 745: 741: 739: 735: 734:transmembrane 731: 728: 724: 723:Daucus carota 720: 716: 701: 695: 689: 683: 677: 671: 665: 659: 653: 647: 643: 641: 637: 634: 631: 629: 625: 622: 618: 614: 611: 609: 605: 601: 597: 594: 591: 587: 582: 578: 575: 572: 570: 566: 563: 560: 558: 554: 551: 548: 546: 542: 538: 534: 529: 524: 518: 516: 513: 509: 505: 497: 495: 491: 487: 485: 484:glycosylation 481: 477: 473: 469: 465: 464: 458: 456: 452: 448: 444: 436: 434: 432: 428: 424: 420: 416: 411: 410:electrostatic 406: 404: 398: 396: 392: 388: 381: 379: 377: 373: 369: 363: 361: 357: 356: 351: 347: 343: 339: 335: 331: 323: 321: 319: 318: 313: 312: 307: 303: 299: 295: 290: 288: 284: 280: 272: 264: 260: 259: 258: 256: 252: 248: 244: 232: 229: 227: 223: 220: 217: 215: 211: 208: 205: 203: 199: 194: 190: 187: 183: 180: 178: 177:Gene Ontology 174: 171: 168: 165: 162: 159: 155: 152: 149: 147: 143: 140: 137: 135: 131: 128: 125: 123: 119: 116: 115:NiceZyme view 113: 111: 107: 104: 101: 99: 95: 92: 89: 87: 83: 78: 75: 72: 70: 66: 63: 60: 58: 54: 49: 44: 40: 36: 30: 25: 20: 2081:Translocases 2078: 2065: 2052: 2039: 2026: 2016:Transferases 2013: 2000: 1857:Binding site 1638:}} 1632:{{ 1596:Endonuclease 1527:ribonuclease 1467: 1250:Nucleotidase 1171:Thioesterase 1047: 925: 922:J. Mol. Biol 921: 905: 878: 874: 854: 819: 815: 805: 770: 766: 756: 742: 737: 727:carbohydrate 722: 712: 501: 492: 488: 461: 459: 440: 407: 399: 385: 372:calcium ions 364: 353: 327: 315: 309: 291: 276: 270: 262: 246: 242: 241: 103:BRENDA entry 34: 1852:Active site 1771:Nuclease S1 1542:Exonuclease 1436:Lecithinase 1265:Calcineurin 1203:Phosphatase 1109:Lipoprotein 1099:Endothelial 531:Identifiers 443:amino acids 338:pollen tube 91:IntEnz view 51:Identifiers 2055:Isomerases 2029:Hydrolases 1896:Regulation 1084:Pancreatic 1021:Carboxylic 816:Plant Cell 748:References 715:C-terminal 596:structures 480:N-terminal 376:hydrolases 342:abscission 330:expression 160:structures 127:KEGG entry 74:9025-98-3 1934:EC number 1661:RNase III 1519:(includes 1460:Sulfatase 1373:Autotaxin 1237:Prostatic 1089:Lysosomal 1004:esterases 1000:Hydrolase 918:​; 875:FEBS Lett 867:​; 697:​, 691:​, 685:​, 679:​, 673:​, 667:​, 661:​, 649:​, 574:PDOC00413 562:IPR000070 519:Structure 261:pectin + 80:Databases 2130:EC 3.1.1 2124:Category 1958:Kinetics 1882:Cofactor 1845:Activity 1755:RNase T1 1517:Nuclease 1152:Cutinase 942:11162105 897:11943159 846:15722470 797:17717531 730:esterase 655:​ 613:RCSB PDB 557:InterPro 431:bacteria 419:isoforms 403:methanol 368:carboxyl 350:pathogen 340:growth, 324:Function 306:methanol 279:bacteria 255:isoforms 231:proteins 219:articles 207:articles 164:RCSB PDB 62:3.1.1.11 2114:Biology 2068:Ligases 1838:Enzymes 1728:RNase E 1723:RNase Z 1718:RNase A 1713:RNase P 1686:RNase H 1304:Phytase 1104:Hepatic 1079:Lingual 1075:Gastric 837:1069703 788:2000356 703:​ 569:PROSITE 550:PF01095 472:peptide 387:Pectins 302:pectate 186:QuickGO 151:profile 134:MetaCyc 69:CAS no. 2100:Portal 2042:Lyases 1666:Drosha 1591:3.1.21 1559:RecBCD 1537:3.1.11 1157:PETase 1065:Lipase 965:(MeSH) 940:  895:  844:  834:  795:  785:  738:E.coli 719:carrot 628:PDBsum 602:  592:  536:Symbol 415:pectin 298:pectin 251:enzyme 214:PubMed 196:Search 182:AmiGO 170:PDBsum 110:ExPASy 98:BRENDA 86:IntEnz 57:EC no. 1994:Types 1675:Dicer 1630:;see 1456:3.1.6 1426:PDE4B 1422:PDE4A 1360:3.1.4 1329:IMPA3 1325:IMPA2 1321:IMPA1 1199:3.1.3 1167:3.1.2 1017:3.1.1 427:fungi 395:Golgi 391:dicot 346:tuber 300:into 283:fungi 146:PRIAM 2086:list 2079:EC7 2073:list 2066:EC6 2060:list 2053:EC5 2047:list 2040:EC4 2034:list 2027:EC3 2021:list 2014:EC2 2008:list 2001:EC1 1593:-31: 1539:-16: 1525:and 1431:PDE5 1417:PDE3 1412:PDE2 1407:PDE1 1299:PTEN 1284:OCRL 1277:PP2A 1226:ALPP 1221:ALPL 1216:ALPI 1010:3.1) 938:PMID 915:1QJV 893:PMID 864:1GQ8 842:PMID 793:PMID 700:2ntq 694:2ntp 688:2ntb 682:2nt9 676:2nt6 670:2nst 664:2nsp 658:1xg2 652:1qjv 646:1gq8 621:PDBj 617:PDBe 600:ECOD 590:Pfam 545:Pfam 453:for 429:and 304:and 281:and 269:O = 226:NCBI 167:PDBe 122:KEGG 43:2ntb 1748:4/5 930:doi 926:305 911:PDB 883:doi 879:514 860:PDB 832:PMC 824:doi 783:PMC 775:doi 640:PDB 608:PDB 447:kDa 296:of 202:PMC 158:PDB 39:PDB 2126:: 1706:2C 1701:2B 1696:2A 1677:: 1668:: 1458:: 1338:: 1327:, 1323:, 1239:)/ 1201:: 1169:: 1138:A2 1133:A1 1019:: 1008:EC 1002:: 936:. 924:. 913:: 891:. 877:. 873:. 862:: 840:. 830:. 820:17 818:. 814:. 791:. 781:. 771:26 769:. 765:. 619:; 615:; 598:/ 506:, 423:pH 405:. 287:pH 184:/ 2102:: 2088:) 2084:( 2075:) 2071:( 2062:) 2058:( 2049:) 2045:( 2036:) 2032:( 2023:) 2019:( 2010:) 2006:( 1830:e 1823:t 1816:v 1743:3 1738:2 1733:1 1691:1 1529:) 1442:) 1438:( 1424:/ 1400:1 1388:D 1383:C 1362:: 1243:/ 1235:( 1143:B 1077:/ 1006:( 992:e 985:t 978:v 944:. 932:: 899:. 885:: 848:. 826:: 799:. 777:: 721:( 271:n 267:2 265:H 263:n

Index


PDB
2ntb
EC no.
3.1.1.11
CAS no.
9025-98-3
IntEnz
IntEnz view
BRENDA
BRENDA entry
ExPASy
NiceZyme view
KEGG
KEGG entry
MetaCyc
metabolic pathway
PRIAM
profile
PDB
RCSB PDB
PDBe
PDBsum
Gene Ontology
AmiGO
QuickGO
PMC
articles
PubMed
articles

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