Knowledge (XXG)

Nef (protein)

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309:(IL-2). Since IL-2 is known to activate the growth, proliferation, and differentiation of T-cells to become effector T-cells; this is a self-serving effect that creates a new population of cells which HIV-1 is able to infect. Self-activation of the infected cell by IL-2 also stimulates the cell to become an effector cell and initiate the machinery which HIV-1 relies upon for its own proliferation. 37: 240:, which function to manipulate the host's cellular machinery and thus allow infection, survival or replication of the pathogen. Nef stands for "Negative Factor" and although it is often considered indispensable for HIV-1 replication, in infected hosts the viral protein markedly elevates viral titers. 372:
The Sydney blood bank cohort (SBBC) were a group of eight patients who were asymptomatic many years after initial infection by transfusion from an infected blood donor. Later analyses showed that the virus strain was a Nef-deleted variant.
280:, Nef creates a narrow TCR response which likely optimizes HIV-1 viral production and generates a susceptible population of cells to further infect. Nef retargets kinase-active Lck away from the plasma membrane to early and recycling 260:
remodeling, and signal transduction. Since the activation state of the infected cell plays an important role in the success rate of HIV-1 infection, it is important that resting T-cells be primed to respond to
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takes place in intracellular compartments including the Golgi apparatus. Nef induced enrichment of active Lck in these compartments results in an increase of localized RAS activity and enhanced activation of
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such as HIV-1 have acquired proteins such as Nef which perform a wide array of functions including the identification of CTLA-4 before it reaches the PM and tagging it for degradation. Nef is also known to
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El-Far M, Isabelle C, Chomont N, Bourbonnière M, Fonseca S, Ancuta P, Peretz Y, Chouikh Y, Halwani R, Schwartz O, Madrenas J, Freeman GJ, Routy JP, Haddad EK, Sékaly RP (January 2013).
288:(TGN). RE/TGN associated Lck sub-populations in Nef expressing cells are in the catalytically active conformation and thus signaling competent. While TCR signaling takes place at the 1204: 1199: 2626: 542:
Laguette N, Bregnard C, Benichou S, Basmaciogullari S (June 2010). "Human immunodeficiency virus (HIV) type-1, HIV-2 and simian immunodeficiency virus Nef proteins".
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Daniel MD, Kirchhoff F, Czajak SC, Sehgal PK, Desrosiers RC (December 1992). "Protective effects of a live attenuated SIV vaccine with a deletion in the nef gene".
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Learmont JC, Geczy AF, Mills J, Ashton LJ, Raynes-Greenow CH, Garsia RJ, Dyer WB, McIntyre L, Oelrichs RB, Rhodes DI, Deacon NJ, Sullivan JS (June 1999).
1784: 1779: 1774: 1769: 1731: 1726: 2106: 1764: 1759: 1235: 1230: 1225: 949: 687:"Immunologic and virologic status after 14 to 18 years of infection with an attenuated strain of HIV-1. A report from the Sydney Blood Bank Cohort" 256:
infection. Viral expression of Nef induces numerous changes within the infected cell including the modulation of protein cell surface expression,
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To further evade the host immune response, Nef down-regulates the cell surface and total expression of the negative immune modulator
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Muthumani K, Choo AY, Hwang DS, Premkumar A, Dayes NS, Harris C, Green DR, Wadsworth SA, Siekierka JJ, Weiner DB (September 2005).
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Cytoskeletal remodeling is thought to reduce TCR signaling during early infection and is also modulated to some degree by Nef.
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which activates T-cells, CTLA-4 is essentially an “off-switch” which would inhibit the viral production if it were activated.
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remodeling is generally modulated by the actin severing factor cofilin. Nef is able to associate with the cellular kinase
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activation and the establishment of a persistent state of infection, two basic attributes of
2268: 1874: 1611: 1606: 1601: 1596: 1591: 1586: 1565: 882: 872: 831: 790: 782: 743: 698: 657: 647: 598: 590: 551: 514: 504: 266: 861:"HIV-1 Nef Binds the DOCK2–ELMO1 Complex to Activate Rac and Inhibit Lymphocyte Chemotaxis" 385:-deleted virus vaccine has not been tried in humans although it was successfully tested in 160: 2498: 1955: 1945: 1698: 289: 262: 229: 739: 643: 2572: 2455: 2000: 1825: 1720: 1326: 1246: 913: 795: 770: 662: 627: 603: 578: 519: 492: 386: 122: 887: 860: 2615: 2172: 1633: 1270: 987: 962: 958: 771:"HIV-1 Nef-induced FasL induction and bystander killing requires p38 MAPK activation" 330: 306: 293: 102: 851: 78: 2241: 2193: 2145: 2097: 2018: 1803: 1639: 1316: 1125: 992: 966: 342: 338: 325: 257: 213: 156: 927: 594: 441: 134: 877: 652: 269:, but is not sufficient to cause activation in the absence of exogenous stimuli. 90: 2581: 2124: 1444: 1407: 703: 686: 786: 2463: 2395: 1992: 1798: 1629: 1625: 555: 302: 2509: 2504: 2445: 2439: 1683: 1560: 1550: 1538: 1311: 975: 836:
10.1002/(SICI)1099-1654(199904/06)9:2<111::AID-RMV245>3.0.CO;2-P
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Piguet V, Trono D (1999). "The Nef protein of primate lentiviruses".
313: 297: 249: 188: 1922: 1912: 1907: 1897: 1892: 1887: 1882: 1489: 1484: 1479: 493:"HIV-1 Nef: a multifaceted modulator of T cell receptor signaling" 353: 21: 208:(Negative Regulatory Factor) is a small 27-35 kDa myristoylated 2474: 2305: 1917: 1902: 1331: 1067: 357: 321: 265:(TCR) stimuli. HIV-1 Nef lowers the threshold for activation of 150: 73: 931: 36: 2535: 2531: 2514: 1660: 1511: 277: 273: 253: 217: 248:
The expression of Nef early in the viral life cycle ensures
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Janardhan A, Swigut T, Hill B, et al. (January 2004).
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Nef localizes primarily to the 26: 2251:Respiratory syncytial virus G protein 360:which phosphorylates and inactivates 7: 30:Negative factor, (F-Protein) or Nef 14: 2155:Mumps hemagglutinin-neuraminidase 1517:Hepatitis B virus DNA polymerase 497:Cell Communication and Signaling 473:. California Lutheran University 419:"Biology of the HIV Nef protein" 1348:(non-enveloped circular ds-DNA) 417:Das SR, Jameel S (April 2005). 236:-expressed proteins, known as 218:Human Immunodeficiency Viruses 1: 2368:Vesiculovirus matrix proteins 316:by targeting the protein for 222:Simian Immunodeficiency Virus 145:Available protein structures: 878:10.1371/journal.pbio.0020006 653:10.1371/journal.pone.0054295 320:degradation. In contrast to 2405:Structure and genome of HIV 1462:(circular partially ds-DNA) 704:10.1056/NEJM199906033402203 595:10.1093/embo-reports/kve141 2643: 1038:Herpesvirus glycoprotein B 787:10.1182/blood-2005-03-0932 228:but also partially to the 18:Nucleotide exchange factor 15: 1033:HHV capsid portal protein 556:10.1016/j.mam.2010.05.003 140: 34: 399:HIV structure and genome 292:(PM), activation of the 232:(PM) and is one of many 16:Not to be confused with 2028:Influenza hemagglutinin 748:10.1126/science.1470917 510:10.1186/1478-811X-10-39 2590:Gag-onc fusion protein 305:and the production of 220:(HIV-1 and HIV-2) and 2560:murine leukemia virus 2451:Reverse transcriptase 2331:Indiana vesiculovirus 2203:Measles hemagglutinin 368:Clinical significance 1291:Early 35 kDa protein 284:(RE) as well as the 54:​ coordinates. 740:1992Sci...258.1938D 644:2013PLoSO...854295E 467:"HIV-1 Nef Protein" 286:Trans-Golgi network 212:encoded by primate 2555:Rous sarcoma virus 916:. MedPageToday.com 426:Indian J. Med. Res 2609: 2608: 2605: 2604: 2601: 2600: 2597: 2596: 2544: 2543: 2390: 2389: 2386: 2385: 2382: 2381: 2378: 2377: 2325: 2324: 2321: 2320: 2263: 2262: 2259: 2258: 2215: 2214: 2211: 2210: 2167: 2166: 2163: 2162: 2119: 2118: 2115: 2114: 2071: 2070: 2046: 2045: 1935: 1934: 1931: 1930: 1793: 1792: 1673: 1672: 1669: 1668: 1620: 1619: 1533: 1532: 1529: 1528: 1525: 1524: 1453: 1452: 1440: 1439: 1390: 1389: 1303: 1302: 1299: 1298: 1265: 1264: 1163: 1162: 1159: 1158: 1120: 1119: 1086: 1085: 1046: 1045: 734:(5090): 1938–41. 238:virulence factors 203: 202: 199: 198: 194:structure summary 2634: 2578: 2569: 2410: 2401: 2348: 2336: 2286: 2274: 2269:Zaire ebolavirus 2238: 2226: 2190: 2178: 2142: 2130: 2094: 2082: 1973: 1961: 1952: 1875:3C-like protease 1810: 1705: 1690: 1646: 1572: 1566:Duplornaviricota 1557: 1544: 1466: 1404: 1364: 1352: 1323: 1276: 1185: 1176: 1131: 1097: 1020: 1008: 999: 981: 952: 945: 938: 929: 924: 922: 921: 900: 890: 880: 855: 809: 808: 798: 766: 760: 759: 723: 717: 716: 706: 682: 676: 675: 665: 655: 623: 617: 616: 606: 574: 568: 567: 544:Mol. Aspects Med 539: 533: 532: 522: 512: 488: 482: 481: 479: 478: 462: 456: 455: 453: 452: 446: 440:. Archived from 423: 414: 216:. These include 142: 53: 39: 27: 2642: 2641: 2637: 2636: 2635: 2633: 2632: 2631: 2612: 2611: 2610: 2593: 2540: 2499:transactivators 2481: 2374: 2317: 2255: 2207: 2159: 2111: 2067: 2042: 2013: 1956:Influenza virus 1946:Negarnaviricota 1943: 1941: 1927: 1853: 1801: 1789: 1738: 1699:Kitrinoviricota 1696: 1681: 1679: 1665: 1637: 1616: 1563: 1548: 1521: 1495: 1461: 1449: 1436: 1386: 1347: 1329: 1315: 1309: 1295: 1261: 1240: 1209: 1171: 1170:(Duplodnaviria, 1169: 1168:circular ds-DNA 1155: 1116: 1082: 1042: 991: 985: 970: 956: 919: 917: 912:Michael Smith. 911: 908: 903: 858: 824:Rev. Med. Virol 821: 817: 815:Further reading 812: 768: 767: 763: 725: 724: 720: 697:(22): 1715–22. 691:N. Engl. J. Med 684: 683: 679: 625: 624: 620: 576: 575: 571: 541: 540: 536: 490: 489: 485: 476: 474: 464: 463: 459: 450: 448: 444: 421: 416: 415: 411: 407: 395: 387:Rhesus macaques 379: 370: 333:and inactivate 290:plasma membrane 267:CD4 lymphocytes 263:T-cell receptor 246: 230:Plasma membrane 118:OPM superfamily 55: 45: 25: 12: 11: 5: 2640: 2638: 2630: 2629: 2624: 2614: 2613: 2607: 2606: 2603: 2602: 2599: 2598: 2595: 2594: 2592: 2587: 2585: 2575: 2573:Fusion protein 2566: 2565: 2564: 2563: 2562: 2557: 2546: 2545: 2542: 2541: 2539: 2538: 2529: 2524: 2519: 2518: 2517: 2512: 2507: 2494: 2492: 2483: 2482: 2480: 2479: 2478: 2477: 2472: 2460: 2459: 2458: 2456:HIV-1 protease 2453: 2448: 2436: 2435: 2434: 2421: 2419: 2407: 2398: 2392: 2391: 2388: 2387: 2384: 2383: 2380: 2379: 2376: 2375: 2373: 2372: 2371: 2370: 2362:matrix protein 2357: 2355: 2345: 2333: 2327: 2326: 2323: 2322: 2319: 2318: 2316: 2315: 2314: 2313: 2308: 2300:matrix protein 2295: 2293: 2283: 2271: 2265: 2264: 2261: 2260: 2257: 2256: 2254: 2253: 2247: 2245: 2235: 2223: 2217: 2216: 2213: 2212: 2209: 2208: 2206: 2205: 2199: 2197: 2187: 2175: 2169: 2168: 2165: 2164: 2161: 2160: 2158: 2157: 2151: 2149: 2139: 2127: 2121: 2120: 2117: 2116: 2113: 2112: 2110: 2109: 2103: 2101: 2091: 2079: 2073: 2072: 2069: 2068: 2066: 2065: 2059: 2057: 2048: 2047: 2044: 2043: 2041: 2040: 2035: 2030: 2024: 2022: 2015: 2014: 2012: 2011: 2010: 2009: 2001:viral envelope 1997: 1996: 1995: 1987:matrix protein 1982: 1980: 1970: 1958: 1949: 1942:negative-sense 1937: 1936: 1933: 1932: 1929: 1928: 1926: 1925: 1920: 1915: 1910: 1905: 1900: 1895: 1890: 1885: 1880: 1879: 1878: 1866: 1864: 1855: 1854: 1852: 1851: 1846: 1845: 1844: 1839: 1834: 1826:viral envelope 1821: 1819: 1807: 1795: 1794: 1791: 1790: 1788: 1787: 1782: 1777: 1772: 1767: 1762: 1757: 1751: 1749: 1740: 1739: 1737: 1736: 1735: 1734: 1729: 1721:viral envelope 1716: 1714: 1702: 1687: 1680:positive-sense 1675: 1674: 1671: 1670: 1667: 1666: 1664: 1663: 1657: 1655: 1643: 1622: 1621: 1618: 1617: 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906:External links 904: 902: 901: 856: 818: 816: 813: 811: 810: 781:(6): 2059–68. 761: 718: 677: 618: 569: 534: 483: 457: 408: 406: 403: 402: 401: 394: 391: 378: 375: 369: 366: 341:member of the 245: 242: 201: 200: 197: 196: 191: 185: 184: 171: 165: 164: 154: 147: 146: 138: 137: 132: 126: 125: 120: 114: 113: 100: 94: 93: 88: 82: 81: 76: 70: 69: 66: 62: 61: 57: 56: 40: 32: 31: 13: 10: 9: 6: 4: 3: 2: 2639: 2628: 2625: 2623: 2620: 2619: 2617: 2591: 2588: 2586: 2583: 2579: 2576: 2574: 2570: 2567: 2561: 2558: 2556: 2553: 2552: 2551: 2550: 2547: 2537: 2533: 2530: 2528: 2525: 2523: 2520: 2516: 2513: 2511: 2508: 2506: 2503: 2502: 2501: 2500: 2496: 2495: 2493: 2491: 2489: 2484: 2476: 2473: 2471: 2468: 2467: 2466: 2465: 2461: 2457: 2454: 2452: 2449: 2447: 2444: 2443: 2442: 2441: 2437: 2433: 2430: 2429: 2428: 2427: 2423: 2422: 2420: 2418: 2416: 2411: 2408: 2406: 2402: 2399: 2397: 2393: 2369: 2366: 2365: 2364: 2363: 2359: 2358: 2356: 2353: 2349: 2346: 2344: 2342: 2337: 2334: 2332: 2328: 2312: 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565: 561: 557: 553: 550:(5): 418–33. 549: 545: 538: 535: 530: 526: 521: 516: 511: 506: 502: 498: 494: 487: 484: 472: 468: 461: 458: 447:on 2017-08-10 443: 439: 435: 432:(4): 315–32. 431: 427: 420: 413: 410: 404: 400: 397: 396: 392: 390: 388: 384: 376: 374: 367: 365: 363: 359: 355: 350: 348: 344: 340: 336: 332: 331:phosphorylate 327: 323: 319: 315: 310: 308: 307:Interleukin-2 304: 299: 295: 291: 287: 283: 279: 275: 270: 268: 264: 259: 255: 251: 243: 241: 239: 235: 231: 227: 223: 219: 215: 211: 207: 195: 192: 190: 186: 183: 179: 175: 172: 170: 166: 162: 158: 155: 152: 148: 143: 139: 136: 133: 131: 127: 124: 121: 119: 115: 112: 108: 104: 101: 99: 95: 92: 89: 87: 83: 80: 77: 75: 71: 67: 63: 58: 52: 48: 43: 38: 33: 28: 23: 19: 2521: 2497: 2486: 2462: 2438: 2424: 2413: 2360: 2339: 2298: 2277: 2242:glycoprotein 2229: 2194:glycoprotein 2181: 2146:glycoprotein 2133: 2098:glycoprotein 2085: 2051: 2019:glycoprotein 1999: 1985: 1964: 1858: 1849:Nucleocapsid 1824: 1813: 1804:Pisuviricota 1743: 1719: 1708: 1649: 1640:Pisuviricota 1575: 1500: 1469: 1395: 1355: 1317:Monodnaviria 1279: 1245: 1214: 1188: 1180:Epstein–Barr 1134: 1126:Adenoviridae 1100: 1051: 1011: 993:Varidnaviria 918:. Retrieved 868: 864: 827: 823: 778: 774: 764: 731: 727: 721: 694: 690: 680: 635: 631: 621: 589:(7): 580–5. 586: 583:EMBO Reports 582: 572: 547: 543: 537: 500: 496: 486: 475:. Retrieved 470: 460: 449:. Retrieved 442:the original 429: 425: 412: 382: 380: 371: 351: 343:Bcl-2 family 339:proapoptotic 326:Lentiviruses 311: 271: 258:cytoskeletal 247: 214:lentiviruses 205: 204: 2582:oncoprotein 1694:Hepatitis C 1459:Hepatitis B 1445:Agnoprotein 1408:oncoprotein 1382:VP2 and VP3 130:OPM protein 60:Identifiers 2616:Categories 2007:M2 protein 1993:M1 protein 1799:SARS-CoV-2 920:2008-09-26 477:2008-08-06 451:2008-08-07 405:References 303:Erk kinase 157:structures 2549:Multiple 2446:Integrase 1684:Riboviria 1561:Rotavirus 1551:Riboviria 1312:Riboviria 871:(1): e6. 865:PLOS Biol 503:(1): 39. 347:apoptosis 318:lysosomal 282:endosomes 226:cytoplasm 91:IPR001558 68:F-protein 2622:HIV/AIDS 1842:Membrane 1837:Envelope 1431:SV40 Tag 1092:Vaccinia 897:14737186 852:25108310 844:10386338 805:15928037 713:10352163 672:23372701 632:PLOS ONE 613:11463741 564:20594957 529:23227982 438:15817946 393:See also 244:Function 234:pathogen 174:RCSB PDB 86:InterPro 2173:Measles 1626:Rhinov. 1073:ICP34.5 796:1895138 756:1470917 736:Bibcode 728:Science 663:3553160 640:Bibcode 604:1083955 520:3534016 377:Vaccine 362:cofilin 210:protein 79:PF00469 2352:capsid 2290:capsid 2038:HA-tag 1977:capsid 1940:ss-RNA 1870:ORF1ab 1678:ss-RNA 1638:etc. ( 1547:ds-RNA 1368:capsid 1236:EBNA-3 1231:EBNA-2 1226:EBNA-1 1024:capsid 895:  888:314466 885:  850:  842:  803:  793:  754:  711:  670:  660:  611:  601:  562:  527:  517:  436:  314:CTLA-4 298:GTPase 250:T-cell 189:PDBsum 163:  153:  111:SUPFAM 65:Symbol 2488:VRAPs 2470:gp120 2125:Mumps 1923:ORF9b 1913:ORF7b 1908:ORF7a 1898:ORF3d 1893:ORF3c 1888:ORF3b 1883:ORF3a 1877:(NS5) 1832:Spike 1634:Hep A 1630:Polio 1490:HBeAg 1485:HBcAg 1480:HBsAg 1344:HaPyV 1340:MCPyV 1308:other 1247:ncRNA 1205:LMP-2 1200:LMP-1 1078:ICP47 1063:vmw65 963:early 848:S2CID 775:Blood 445:(PDF) 422:(PDF) 354:Actin 107:SCOPe 98:SCOP2 22:S100B 2475:gp41 2415:VSPs 2341:VSPs 2311:VP24 2306:VP40 2279:VSPs 2231:VSPs 2183:VSPs 2135:VSPs 2087:VSPs 2053:VNPs 1966:VSPs 1918:ORF8 1903:ORF6 1860:VNPs 1815:VSPs 1785:NS5B 1780:NS5A 1775:NS4B 1770:NS4A 1745:VNPs 1710:VSPs 1651:VNPs 1612:NSP6 1607:NSP5 1602:NSP4 1597:NSP3 1592:NSP2 1587:NSP1 1577:VNPs 1502:VNPs 1471:VSPs 1427:LTag 1422:MTag 1417:STag 1397:VNPs 1357:VSPs 1336:MPyV 1332:SV40 1281:VNPs 1257:EBER 1216:VNPs 1190:VSPs 1136:VNPs 1112:B13R 1102:VNPs 1068:ICP8 1053:VNPs 1013:VSPs 967:late 965:and 893:PMID 840:PMID 801:PMID 752:PMID 709:PMID 668:PMID 609:PMID 560:PMID 525:PMID 434:PMID 358:PAK2 337:, a 322:CD28 276:and 182:PDBj 178:PDBe 161:ECOD 151:Pfam 135:2nef 103:1avv 74:Pfam 51:2NEF 2536:Vpx 2534:or 2532:Vpu 2527:Vif 2522:Nef 2515:Vpr 2510:Rev 2505:Tat 2464:env 2440:pol 2432:p24 2426:gag 2221:RSV 2063:NS1 1765:NS3 1760:NS2 1661:VPg 1539:RNA 1512:HBx 1377:VP1 1151:E1B 1146:E1A 976:DNA 883:PMC 873:doi 832:doi 791:PMC 783:doi 779:106 744:doi 732:258 699:doi 695:340 658:PMC 648:doi 599:PMC 591:doi 552:doi 515:PMC 505:doi 430:121 383:Nef 335:Bad 294:Ras 278:Lck 274:CD4 254:HIV 206:Nef 169:PDB 123:269 47:PDB 42:NMR 20:or 2618:: 2396:RT 1755:P7 1732:E2 1727:E1 1632:, 1628:, 1342:, 1338:, 1334:, 891:. 881:. 867:. 863:. 846:. 838:. 826:. 799:. 789:. 777:. 773:. 750:. 742:. 730:. 707:. 693:. 689:. 666:. 656:. 646:. 634:. 630:. 607:. 597:. 585:. 581:. 558:. 548:31 546:. 523:. 513:. 501:10 499:. 495:. 469:. 428:. 424:. 389:. 381:A 349:. 180:; 176:; 159:/ 109:/ 105:/ 49:: 2584:: 2490:: 2417:: 2354:: 2343:: 2292:: 2281:: 2244:: 2233:: 2196:: 2185:: 2148:: 2137:: 2100:: 2089:: 2055:: 2021:: 1979:: 1968:: 1948:) 1944:( 1862:: 1817:: 1806:) 1802:( 1747:: 1712:: 1701:) 1697:( 1686:) 1682:( 1653:: 1642:) 1636:, 1579:: 1568:) 1564:( 1553:) 1549:( 1504:: 1473:: 1433:) 1429:( 1410:: 1399:: 1370:: 1359:: 1346:) 1330:( 1319:) 1314:, 1310:( 1283:: 1249:: 1218:: 1192:: 1138:: 1104:: 1055:: 1026:: 1015:: 995:) 990:, 986:( 969:) 961:( 951:e 944:t 937:v 923:. 899:. 875:: 869:2 854:. 834:: 828:9 807:. 785:: 758:. 746:: 738:: 715:. 701:: 674:. 650:: 642:: 636:8 615:. 593:: 587:2 566:. 554:: 531:. 507:: 480:. 454:. 296:- 24:.

Index

Nucleotide exchange factor
S100B

NMR
PDB
2NEF
Pfam
PF00469
InterPro
IPR001558
SCOP2
1avv
SCOPe
SUPFAM
OPM superfamily
269
OPM protein
2nef
Pfam
structures
ECOD
PDB
RCSB PDB
PDBe
PDBj
PDBsum
structure summary
protein
lentiviruses
Human Immunodeficiency Viruses

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