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Leucyl aminopeptidase

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bovine lens LAP and PepA have been elucidated (Ref 1 and 2), however, the exact mechanism of tomato LAP-A is unknown at this time. A search of current literature does not indicate that new research is underway to determine the exact mechanism of LAP-A. Based on the biochemical similarities of the
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whose expression changes over time. The early genes amplify the wounding signal and can be detected 30 minutes to 2 hours after damage (Ryan 2000). Late gene expression can be seen 4–24 hours after wounding. Products of late-response genes act as deterrents to chewing-insect feeding, often by
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in wounded LapA-SI plants, and the LapA-SI plants were also more susceptible to tobacco hornworm feeding, relative to wildtype (WT) plants. In comparison, the wounded LapA-OX leaves exhibited heightened levels of late gene RNA accumulation, an increased resistance to herbivory, and extended
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LAP proteins are expressed in a variety of marine organisms as a method of coping with the osmotic threat high salinity poses to the cell. During bouts of high salinity, LAP begins the catalysis of proteins in order to release amino acids into the cell in an attempt to balance the high ion
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Sträter N, Lipscomb WN (November 1995). "Two-metal ion mechanism of bovine lens leucine aminopeptidase: active site solvent structure and binding mode of L-leucinal, a gem-diolate transition state analogue, by X-ray crystallography".
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expression of late wound-response genes. These data suggest that LAP-A functions in regulating both the intensity and the persistence of the late wound response. However, unwounded LapA-OX did not accumulate late gene
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have been much more well-studied and understood by researchers (Ref #6 Lipscomb 1990). Work within the past two decades has provided vital knowledge regarding the mechanisms of aminopeptidases. The mechanism of
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transcripts, suggesting that presence of LAP-A alone is not sufficient to induce late gene expression. LAP-A is the first plant aminopeptidase shown to have a regulatory role in signal transduction pathway.
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come together to form the 353kDa bioactive LAP-A hexamer. Structures of the bovine lens LAP protomer and the biologically active hexamer have been constructed can be found through Protein Data Bank (2J9A).
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in PepA and in bovine lens LAP have been found to be similar. Shown in the picture below is the proposed model for the active site of LAP-A in tomato based on the work of Strater
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by herbivores (Johnson et al. 1989; Ryan 2000; Orozco-Cardenas 2001). Please see the Picture 3 for a summary of the wound response in tomato.
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In this mechanism, the bicarbonate ion acts as a general base. For LAP-A, R1 could be the R group of leucine, methionine, or arginine.
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optima. At pH 8, the highest enzymatic activity is seen at 60 Â°C. PepA, bovine lens LAP and LAP-A are also known to form
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for their enzymatic activity Enzymes are active in the presence of Mn, Mg and Zn. These enzymes are also known to have high
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decreasing the nutritional value of the food ingested or interfering with insect gut function (Walling 2000). For example,
1681: 1596: 395: 2110: 1614: 1064: 2145: 516: 974:"Overexpression, purification and biochemical characterization of the wound-induced leucine aminopeptidase of tomato" 701:"Overexpression, purification and biochemical characterization of the wound-induced leucine aminopeptidase of tomato" 1980: 2096: 2083: 2070: 2057: 2044: 2031: 2018: 1797: 1713: 1636: 1606: 1588: 1541: 1506: 1434: 1421: 1990: 937:"Identification of residues critical for activity of the wound-induced leucine aminopeptidase (LAP-A) of tomato" 658:"Identification of residues critical for activity of the wound-induced leucine aminopeptidase (LAP-A) of tomato" 339:
residues. Two Zn+2 cations are also shown, along with a water and a bicarbonate ion that acts as a general base.
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Ryan CA (March 2000). "The systemin signaling pathway: differential activation of plant defensive genes".
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to have a regulatory role in the late wound response of tomato. Experiments were conducted using three
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Crystal structure of bovine leucyl aminopeptidase with co-ordinated zinc ions. Rendered from PDB
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is very similar. PepA, bovine lens LAP, and LAP-A preferentially cleave N-terminal leucine,
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LAPs between kingdoms, the mechanism of LAP-A may be similar to bovine lens LAP and PepA.
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Fowler JH, Narváez-Vásquez J, Aromdee DN, Pautot V, Holzer FM, Walling LL (April 2009).
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proteinase inhibitors (Pins) interfere with digestive proteases in the insect gut and
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Hilbish TJ (1985). "The Physiological Basis of Natural Selection at the Lap Locus".
1867: 1425: 1054: 1015: 787: 748: 394:. The Gu et al. from 1999 demonstrated that six 55kDA enzymatically inactive LAP-A 352: 1037: 1010: 770: 743: 105: 2091: 2026: 1862: 1671: 1618: 1554: 1514: 1373: 1211:
Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology
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Proceedings of the National Academy of Sciences of the United States of America
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Proceedings of the National Academy of Sciences of the United States of America
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Proceedings of the National Academy of Sciences of the United States of America
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Proceedings of the National Academy of Sciences of the United States of America
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pathways (Ref Walling 2000). This particular pathway is inhibited by
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Walling LL (June 2000). "The Myriad Plant Responses to Herbivores".
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Kraft M, Schleberger C, Weckesser J, Schulz GE (December 2006).
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Kraft M, Schleberger C, Weckesser J, Schulz GE (December 2006).
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Orozco-Cárdenas ML, Narváez-Vásquez J, Ryan CA (January 2001).
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Sträter N, Sun L, Kantrowitz ER, Lipscomb WN (September 1999).
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Sträter N, Sun L, Kantrowitz ER, Lipscomb WN (September 1999).
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The plant response in this octadecanoid pathway is similar to
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online database for peptidases and their inhibitors: Animal:
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In order to survive, plants must be able to respond to many
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residues. These enzymes are all metallopeptidases requiring
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Johnson R, Narvaez J, An G, Ryan C (December 1989).
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The wounding response pathway as studied in tomato.
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Identified LAPs include human LAP, 7: 1766:Amyloid precursor protein secretase 456:Background on plant immune response 1065:Journal of Plant Growth Regulation 14: 2118: 1751:Proteasome endopeptidase complex 993:10.1046/j.1432-1327.1999.00548.x 979:European Journal of Biochemistry 956:10.1046/j.1432-1327.2002.02795.x 942:European Journal of Biochemistry 935:Gu YQ, Walling LL (March 2002). 720:10.1046/j.1432-1327.1999.00548.x 706:European Journal of Biochemistry 677:10.1046/j.1432-1327.2002.02795.x 663:European Journal of Biochemistry 656:Gu YQ, Walling LL (March 2002). 315:-specific acidic LAP (LAP-A) in 1: 1615:Serine type carboxypeptidases 1597:Angiotensin-converting enzyme 1223:10.1016/S0167-4838(99)00269-1 1038:10.1016/j.febslet.2006.11.060 771:10.1016/j.febslet.2006.11.060 355:of the LAPs from these three 482:signal transduction pathways 351:. It is also known that the 2141:Genes on human chromosome 4 2172: 236:leucinamide aminopeptidase 1996:Michaelis–Menten kinetics 472:attack, piercing/sucking 157: 26: 1888:Diffusion-limited enzyme 1577:Tripeptidyl peptidase II 1368:Medical Subject Headings 877:10.1073/pnas.96.20.11151 624:10.1073/pnas.96.20.11151 228:L-leucine aminopeptidase 1746:Threonine endopeptidase 1572:Tripeptidyl peptidase I 1267:10.1073/pnas.86.24.9871 1130:10.1073/pnas.88.16.6916 1736:Aspartic acid protease 1560:Dipeptidyl peptidase-4 1313:10.1105/tpc.108.065029 521: 488:damage activating the 428: 340: 220:cytosol aminopeptidase 204:leucine aminopeptidase 193:Leucyl aminopeptidases 22:Leucine aminopeptidase 1981:Eadie–Hofstee diagram 1914:Allosteric regulation 1567:Tripeptidyl peptidase 1364:Leucyl+aminopeptidase 1078:10.1007/s003440000026 519: 440:Once thought of as a 426: 334: 1991:Lineweaver–Burk plot 1741:Metalloendopeptidase 1646:Metalloexopeptidases 1550:Dipeptidyl peptidase 543:Octadecanoid pathway 494:octadecanoid pathway 468:stresses, including 452:response in tomato. 321:Solanum lycopersicum 262:that preferentially 232:leucinaminopeptidase 1756:HslU—HslV peptidase 1700:Metalloexopeptidase 1258:1989PNAS...86.9871J 1121:1991PNAS...88.6916B 1029:2006FEBSL.580.6943K 920:10.1021/bi00045a021 868:1999PNAS...9611151S 762:2006FEBSL.580.6943K 615:1999PNAS...9611151S 507:polyphenol oxidases 444:necessary only for 436:Biological function 2146:Chemical pathology 1950:Enzyme superfamily 1883:Enzyme promiscuity 555:of tomato plants: 522: 429: 407:Historically, the 341: 252:aminopeptidase III 2106: 2105: 1815: 1814: 1764:Other/ungrouped: 1731:Cysteine protease 1708: 1707: 1626: 914:(45): 14792–800. 442:housekeeping gene 413:carboxypeptidases 248:aminopeptidase II 190: 189: 186: 185: 2163: 2123: 2122: 2114: 1986:Hanes–Woolf plot 1929:Enzyme activator 1924:Enzyme inhibitor 1898:Enzyme catalysis 1842: 1835: 1828: 1819: 1781:Beta-secretase 2 1776:Beta-secretase 1 1652:Carboxypeptidase 1648: 1624: 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2151:Tumor markers 2149: 2147: 2144: 2142: 2139: 2138: 2136: 2126: 2121: 2116: 2112: 2098: 2094: 2093: 2088: 2085: 2081: 2080: 2075: 2072: 2068: 2067: 2062: 2059: 2055: 2054: 2049: 2046: 2042: 2041: 2036: 2033: 2029: 2028: 2023: 2020: 2016: 2015: 2010: 2009: 2007: 2003: 1997: 1994: 1992: 1989: 1987: 1984: 1982: 1979: 1977: 1974: 1973: 1971: 1967: 1961: 1958: 1956: 1955:Enzyme family 1953: 1951: 1948: 1946: 1943: 1942: 1940: 1936: 1930: 1927: 1925: 1922: 1920: 1919:Cooperativity 1917: 1915: 1912: 1911: 1909: 1905: 1899: 1896: 1894: 1891: 1889: 1886: 1884: 1881: 1879: 1878:Oxyanion hole 1876: 1874: 1871: 1869: 1866: 1864: 1861: 1860: 1858: 1854: 1850: 1843: 1838: 1836: 1831: 1829: 1824: 1823: 1820: 1808: 1805: 1804: 1802: 1799: 1795: 1787: 1784: 1782: 1779: 1777: 1774: 1772: 1769: 1768: 1767: 1763: 1762: 1757: 1754: 1752: 1749: 1748: 1747: 1744: 1742: 1739: 1737: 1734: 1732: 1729: 1727: 1724: 1723: 1721: 1719: 1718:Endopeptidase 1715: 1711: 1701: 1698: 1697: 1695: 1691: 1683: 1680: 1678: 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393: 392: 388: 384: 380: 376: 373: 370: 366: 362: 358: 354: 350: 346: 338: 333: 326: 324: 322: 318: 314: 310: 309: 304: 300: 296: 292: 291:superkingdoms 288: 284: 280: 276: 273: 269: 265: 261: 257: 253: 249: 245: 241: 240:FTBL proteins 237: 233: 229: 225: 224:cathepsin III 221: 217: 213: 209: 205: 201: 198: 194: 182: 179: 175: 172: 169: 165: 160: 156: 153: 152: 148: 145: 143: 139: 136: 133: 131: 127: 122: 119: 116: 114: 110: 107: 104: 102: 98: 95: 92: 90: 86: 83: 80: 78: 74: 71: 68: 66: 62: 58: 54: 50: 46: 41: 36: 30: 25: 20: 2092:Translocases 2089: 2076: 2063: 2050: 2037: 2027:Transferases 2024: 2011: 1868:Binding site 1682:Glutamate II 1477: 1467: 1426:Exopeptidase 1304: 1298: 1249: 1243: 1214: 1210: 1167: 1161: 1112: 1106: 1069: 1063: 1020: 1016:FEBS Letters 1014: 983: 977: 946: 940: 911: 907:Biochemistry 905: 859: 853: 806: 802: 796: 753: 749:FEBS Letters 747: 737: 710: 704: 694: 667: 661: 651: 606: 600: 590: 576: 548: 546: 523: 459: 439: 430: 417:endoprotease 406: 403:Mechanism(s) 389: 353:biochemistry 348: 345:active sites 342: 320: 306: 302: 255: 251: 247: 243: 239: 235: 231: 227: 223: 219: 215: 211: 207: 203: 192: 191: 149: 56:Alt. symbols 1863:Active site 1619:Cathepsin A 1555:Cathepsin C 1515:Dipeptidase 1352:, Bacteria: 533:leukotriene 383:temperature 381:(pH 8) and 337:active site 313:solanaceous 216:peptidase S 171:Swiss-model 43:Identifiers 2135:Categories 2066:Isomerases 2040:Hydrolases 1907:Regulation 582:References 409:mechanisms 365:methionine 297:lens LAP, 279:N-terminus 268:hydrolysis 167:Structures 162:Search for 124:Other data 2156:EC 3.4.11 1945:EC number 1800:: Unknown 1478:Methionyl 1409:proteases 1405:Hydrolase 1356:, Plant:: 803:Evolution 561:inhibited 553:genotypes 526:mammalian 511:ingestion 478:herbivory 396:protomers 130:EC number 106:NM_015907 65:NCBI gene 1969:Kinetics 1893:Cofactor 1856:Activity 1473:Glutamyl 1463:Cystinyl 1458:Aspartyl 1331:19376935 1231:10708853 1202:11158538 1094:11842328 1086:11038228 1047:17157838 1002:10469136 965:11895433 896:10500145 831:28564261 780:17157838 729:10469136 686:11895433 643:10500145 557:wildtype 470:pathogen 387:hexamers 369:divalent 361:arginine 357:kingdoms 287:proteins 283:peptides 275:residues 264:catalyze 200:3.4.11.1 181:InterPro 135:3.4.11.1 2125:Biology 2079:Ligases 1849:Enzymes 1453:Arginyl 1448:Alanine 1358:M17.002 1354:M17.003 1350:M17.001 1322:2685619 1286:2602379 1254:Bibcode 1184:3871162 1149:1871107 1117:Bibcode 1055:6425967 1025:Bibcode 928:7578088 864:Bibcode 842:Sources 823:2408787 788:6425967 758:Bibcode 611:Bibcode 474:insects 466:abiotic 391:in vivo 375:cations 308:E. coli 299:porcine 277:at the 272:leucine 260:enzymes 177:Domains 113:UniProt 2111:Portal 2053:Lyases 1798:3.4.99 1714:3.4.21 1637:3.4.17 1607:3.4.16 1589:3.4.15 1542:3.4.14 1507:3.4.13 1468:Leucyl 1435:3.4.11 1422:3.4.11 1370:(MeSH) 1346:MEROPS 1329:  1319:  1284:  1277:298604 1274:  1229:  1200:  1193:102208 1190:  1182:  1147:  1137:  1092:  1084:  1053:  1045:  1000:  963:  926:  894:  884:  829:  821:  786:  778:  727:  684:  641:  631:  549:et al. 503:serine 486:tissue 462:biotic 450:immune 363:, and 335:LAP-A 317:tomato 295:bovine 258:) are 151:p15.33 147:Chr. 4 118:P28838 101:RefSeq 94:170250 48:Symbol 2005:Types 1716:-25: 1424:-19: 1180:JSTOR 1140:52204 1090:S2CID 1051:S2CID 887:18002 819:JSTOR 784:S2CID 634:18002 498:genes 372:metal 349:et al 301:LAP, 142:Locus 82:18449 70:51056 2097:list 2090:EC7 2084:list 2077:EC6 2071:list 2064:EC5 2058:list 2051:EC4 2045:list 2038:EC3 2032:list 2025:EC2 2019:list 2012:EC1 1415:3.4) 1344:The 1327:PMID 1282:PMID 1227:PMID 1215:1477 1198:PMID 1145:PMID 1082:PMID 1043:PMID 998:PMID 961:PMID 924:PMID 892:PMID 827:PMID 776:PMID 725:PMID 682:PMID 639:PMID 531:and 464:and 415:and 343:The 285:and 266:the 208:LAPs 89:OMIM 77:HGNC 59:PEPS 35:1BLL 1317:PMC 1309:doi 1272:PMC 1262:doi 1219:doi 1188:PMC 1172:doi 1135:PMC 1125:doi 1074:doi 1033:doi 1021:580 988:doi 984:263 951:doi 947:269 916:doi 882:PMC 872:doi 811:doi 766:doi 754:580 715:doi 711:263 672:doi 668:269 629:PMC 619:doi 566:RNA 411:of 323:). 281:of 270:of 51:LAP 2137:: 1662:A2 1625:DD 1617:: 1413:EC 1407:: 1325:. 1315:. 1305:21 1303:. 1297:. 1280:. 1270:. 1260:. 1250:86 1248:. 1242:. 1225:. 1213:. 1196:. 1186:. 1178:. 1168:13 1166:. 1160:. 1143:. 1133:. 1123:. 1113:88 1111:. 1105:. 1088:. 1080:. 1070:19 1068:. 1049:. 1041:. 1031:. 1019:. 1013:. 996:. 982:. 976:. 959:. 945:. 939:. 922:. 912:34 910:. 890:. 880:. 870:. 860:96 858:. 852:. 825:. 817:. 807:39 805:. 782:. 774:. 764:. 752:. 746:. 723:. 709:. 703:. 680:. 666:. 660:. 637:. 627:. 617:. 607:96 605:. 599:. 539:. 476:, 379:pH 254:, 250:, 246:, 242:, 238:, 234:, 230:, 226:, 222:, 218:, 214:, 210:, 206:, 202:, 197:EC 2113:: 2099:) 2095:( 2086:) 2082:( 2073:) 2069:( 2060:) 2056:( 2047:) 2043:( 2034:) 2030:( 2021:) 2017:( 1841:e 1834:t 1827:v 1677:E 1672:C 1667:B 1657:A 1530:3 1525:2 1520:1 1495:O 1488:2 1483:1 1411:( 1397:e 1390:t 1383:v 1360:. 1333:. 1311:: 1288:. 1264:: 1256:: 1233:. 1221:: 1204:. 1174:: 1151:. 1127:: 1119:: 1096:. 1076:: 1057:. 1035:: 1027:: 1004:. 990:: 967:. 953:: 930:. 918:: 898:. 874:: 866:: 833:. 813:: 790:. 768:: 760:: 731:. 717:: 688:. 674:: 645:. 621:: 613:: 319:( 305:( 195:( 37:.

Index


1BLL
NCBI gene
51056
HGNC
18449
OMIM
170250
RefSeq
NM_015907
UniProt
P28838
EC number
3.4.11.1
Locus
Chr. 4
p15.33
Swiss-model
InterPro
EC
3.4.11.1
enzymes
catalyze
hydrolysis
leucine
residues
N-terminus
peptides
proteins
superkingdoms

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