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Eukaryotic initiation factor 4F

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and the eIF4G scaffold, connecting the mRNA 5' terminus to a hub of other initiation factors and mRNA. The interaction of eIF4G•A is thought to guide the formation of a single-stranded RNA landing pad for the
2118: 68:. The mammalian eIF4F complex was first described in 1983, and has been a major area of study into the molecular mechanisms of cap-dependent translation initiation ever since. 1769: 100:
Structures of eIF4F components have been solved individually and as partial complexes by a variety of methods, but no complete structure of eIF4F is currently available.
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translation initiation; for instance, certain viral proteases cleave eIF4G to remove the eIF4E-binding region, thus inhibiting cap-dependent translation.
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In mammals, the eIF4E•G•A trimeric complex can be directly purified from cells, while only the two subunit eIF4E•G can be purified from yeast cells.
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Gross, John D.; Moerke, Nathan J.; von der Haar, Tobias; Lugovskoy, Alexey A.; Sachs, Alan B.; McCarthy, John E.G.; Wagner, Gerhard (2003).
331:. Phosphorylation of 4E-BPs by mTOR prevents their binding to eIF4E, freeing eIF4E to bind eIF4G and participate in translation initiation. 2570: 2565: 2560: 2555: 2545: 2525: 2520: 2510: 2500: 2480: 2475: 2470: 2460: 2455: 2450: 2445: 2435: 2425: 2420: 2415: 2410: 2187: 2380: 2375: 2365: 1248: 845: 825: 1173: 933: 299:
In addition to the major proteins encompassing the eIF4F trimer, the eIF4F complex functionally interacts with proteins including
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The eIF4F proteins interact with a number of different binding partners, and there are multiple genetic isoforms of
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Aitken CE, Lorsch JR (June 2012). "A mechanistic overview of translation initiation in eukaryotes".
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Low WK, Dang Y, Schneider-Poetsch T, Shi Z, Choi NS, Merrick WC, Romo D, Liu JO (December 2005).
444: 372:"Ribosome Loading onto the mRNA Cap Is Driven by Conformational Coupling between eIF4G and eIF4E" 1877: 1694: 1221: 1142: 747: 706: 649: 600: 559: 510: 436: 401: 393: 113: 669:"Rocaglates convert DEAD-box protein eIF4A into a sequence-selective translational repressor" 2751: 2741: 2736: 2726: 2716: 2696: 2681: 2676: 2671: 2656: 2651: 2646: 2631: 1779: 737: 696: 688: 639: 631: 590: 549: 541: 500: 490: 428: 383: 2621: 2601: 2596: 2586: 1276: 1266: 726:"Inhibition of eukaryotic translation initiation by the marine natural product pateamine A" 1119: 956: 802: 35: 684: 2835: 1839: 946: 918: 701: 668: 644: 619: 554: 529: 505: 478: 350: 116: 39: 23:
Solution structure of yeast eIF4E bound to the m7G cap and a eIF4G fragment (PDB 1RF8).
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in the human genome. In mammals, eIF4F is bridged to the 40S ribosomal subunit by
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initiation. The eIF4F complex is composed of three non-identical subunits: the
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or DAP5, also appears to perform a non-canonical translation function.
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translation initiation. Components of the complex are also involved in
579:"Circularization of mRNA by eukaryotic translation initiation factors" 432: 2756: 2746: 2731: 2721: 2711: 2706: 2701: 2691: 2686: 2666: 2661: 2641: 2636: 1813: 1786: 1774: 1647: 1603: 1598: 1581: 1576: 1564: 1559: 1554: 1487: 1438: 1433: 1428: 1423: 1418: 1403: 1398: 1386: 1362: 1357: 530:"Quantitative studies of mRNA recruitment to the eukaryotic ribosome" 324: 308: 275: 271: 241: 237: 233: 195: 191: 187: 2626: 2616: 2611: 2606: 2591: 2336: 2143: 1865: 1860: 1818: 1808: 1764: 1716: 1711: 1654: 1642: 1615: 1610: 1588: 1571: 1549: 1527: 1517: 1512: 1507: 1502: 1497: 1492: 1482: 1477: 1472: 1467: 1413: 1408: 1345: 1271: 860: 771: 320: 304: 300: 263: 225: 209: 205: 201: 179: 152: 151:, while budding yeast lacks this connection. Interactions between 148: 140: 136: 132: 109: 65: 61: 57: 1850: 1825: 1746: 1741: 1736: 1726: 1721: 1676: 1666: 1637: 1627: 1539: 1457: 1445: 1376: 1350: 1340: 1330: 144: 1162: 775: 830: 159:
are thought to mediate the circularization of mRNA particles.
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Wells SE, Hillner PE, Vale RD, Sachs AB (July 1998).
2777: 2579: 2358: 2349: 2157: 1894: 1885: 1876: 1838: 1755: 1702: 1693: 1663: 1624: 1536: 1454: 1373: 1327: 1318: 1285: 1257: 1229: 1220: 1213: 1135: 1044: 1009: 983: 974: 932: 906: 880: 871: 809: 280:"Scaffold" protein. Binds mRNA, eIF4A, eIF4E, and 296:Approximate molecular weight for human proteins. 1174: 787: 667:Iwasaki S, Floor SN, Ingolia NT (June 2016). 8: 16:Multiprotein complex used in gene expression 323:subunit of eIF4F is an important target of 2355: 1891: 1882: 1699: 1324: 1226: 1217: 1181: 1167: 1159: 980: 942:Precursor mRNA (pre-mRNA / hnRNA) 877: 794: 780: 772: 200:DEAD-box RNA helicase. Binds mRNA, eIF4G, 741: 700: 643: 594: 553: 504: 494: 472: 470: 468: 466: 464: 462: 460: 458: 421:Nature Structural & Molecular Biology 387: 161: 18: 2826: 362: 618:Cencic R, Pelletier J (January 2016). 76:eIF4F is important for recruiting the 962:Histone acetylation and deacetylation 7: 1027:Ribosome-nascent chain complex (RNC) 483:The Journal of Biological Chemistry 212:. Inhibited by the small molecules 64:, and the large "scaffold" protein 291: 246:Cap-binding protein. Binds eIF4G, 14: 2829: 307:. The unusual isoform of eIF4G, 1032:Post-translational modification 28:Eukaryotic initiation factor 4F 1: 636:10.1080/21690731.2015.1137381 596:10.1016/S1097-2765(00)80122-7 389:10.1016/s0092-8674(03)00975-9 329:eIF4E binding protein (4E-BP) 78:small ribosomal subunit (40S) 743:10.1016/j.molcel.2005.10.008 546:10.1016/j.biochi.2015.02.017 346:Eukaryotic initiation factor 477:Merrick WC (October 2015). 382:(6). Elsevier BV: 739–750. 2883: 60:, the cap-binding protein 2785:Aminoacyl tRNA synthetase 220:(RocA), and pateamine A. 122:43S preinitiation complex 2809:Kozak consensus sequence 1093:sequestration (P-bodies) 479:"eIF4F: a retrospective" 2805:Shine-Dalgarno sequence 1071:Gene regulatory network 528:Fraser CS (July 2015). 496:10.1074/jbc.R115.675280 1076:cis-regulatory element 341:Eukaryotic translation 327:signaling through the 124:(43S PIC) via eIF4A's 48:eukaryotic translation 44:messenger RNAs (mRNAs) 34:) is a heterotrimeric 24: 22: 2867:RNA-binding proteins 2852:Protein biosynthesis 1705:​Mitochondrial 1190:Protein biosynthesis 1098:alternative splicing 1088:Post-transcriptional 914:Transcription factor 1022:Transfer RNA (tRNA) 693:10.1038/nature17978 685:2016Natur.534..558I 1878:Ribosomal Proteins 1136:Influential people 1115:Post-translational 934:Post-transcription 25: 2862:Protein complexes 2817: 2816: 2773: 2772: 2769: 2768: 2765: 2764: 2345: 2344: 1834: 1833: 1758:​Eukaryotic 1695:Elongation factor 1689: 1688: 1685: 1684: 1222:Initiation factor 1156: 1155: 1040: 1039: 970: 969: 846:Special transfers 433:10.1038/nsmb.2303 288: 287: 2874: 2834: 2833: 2825: 2356: 1892: 1883: 1757: 1704: 1700: 1670: 1631: 1543: 1461: 1380: 1334: 1325: 1227: 1218: 1183: 1176: 1169: 1160: 981: 878: 796: 789: 782: 773: 756: 755: 745: 721: 715: 714: 704: 679:(7608): 558–61. 664: 658: 657: 647: 615: 609: 608: 598: 574: 568: 567: 557: 525: 519: 518: 508: 498: 474: 453: 452: 416: 410: 409: 391: 367: 295: 162: 84:of mRNAs during 2882: 2881: 2877: 2876: 2875: 2873: 2872: 2871: 2857:Gene expression 2842: 2841: 2840: 2828: 2820: 2818: 2813: 2761: 2575: 2341: 2153: 1872: 1830: 1751: 1681: 1664: 1659: 1625: 1620: 1537: 1532: 1455: 1450: 1374: 1369: 1328: 1314: 1281: 1253: 1209: 1187: 1157: 1152: 1131: 1066:Transcriptional 1036: 1005: 966: 957:Polyadenylation 928: 902: 867: 861:Protein→Protein 812: 805: 803:Gene expression 800: 760: 759: 723: 722: 718: 666: 665: 661: 630:(1): e1137381. 617: 616: 612: 576: 575: 571: 527: 526: 522: 489:(40): 24091–9. 476: 475: 456: 418: 417: 413: 369: 368: 364: 359: 337: 317: 290: 106: 98: 90:cap-independent 74: 38:that binds the 36:protein complex 17: 12: 11: 5: 2880: 2878: 2870: 2869: 2864: 2859: 2854: 2844: 2843: 2839: 2838: 2815: 2814: 2812: 2811: 2802: 2797: 2792: 2787: 2781: 2779: 2778:Other concepts 2775: 2774: 2771: 2770: 2767: 2766: 2763: 2762: 2760: 2759: 2754: 2749: 2744: 2739: 2734: 2729: 2724: 2719: 2714: 2709: 2704: 2699: 2694: 2689: 2684: 2679: 2674: 2669: 2664: 2659: 2654: 2649: 2644: 2639: 2634: 2629: 2624: 2619: 2614: 2609: 2604: 2599: 2594: 2589: 2583: 2581: 2577: 2576: 2574: 2573: 2568: 2563: 2558: 2553: 2548: 2543: 2538: 2533: 2528: 2523: 2518: 2513: 2508: 2503: 2498: 2493: 2488: 2483: 2478: 2473: 2468: 2463: 2458: 2453: 2448: 2443: 2438: 2433: 2428: 2423: 2418: 2413: 2408: 2403: 2398: 2393: 2388: 2383: 2378: 2373: 2368: 2362: 2360: 2353: 2347: 2346: 2343: 2342: 2340: 2339: 2334: 2329: 2324: 2319: 2314: 2309: 2304: 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908: 904: 903: 901: 900: 895: 890: 884: 882: 875: 869: 868: 866: 865: 864: 863: 858: 853: 843: 842: 841: 823: 817: 815: 807: 806: 801: 799: 798: 791: 784: 776: 770: 769: 767: 765: 763: 758: 757: 730:Molecular Cell 716: 659: 610: 583:Molecular Cell 569: 520: 454: 411: 361: 360: 358: 355: 354: 353: 348: 343: 336: 333: 316: 313: 286: 285: 278: 269: 266: 260: 259: 244: 231: 228: 222: 221: 198: 185: 182: 176: 175: 172: 169: 166: 105: 102: 97: 94: 73: 70: 15: 13: 10: 9: 6: 4: 3: 2: 2879: 2868: 2865: 2863: 2860: 2858: 2855: 2853: 2850: 2849: 2847: 2837: 2832: 2827: 2823: 2810: 2806: 2803: 2801: 2798: 2796: 2793: 2791: 2790:Reading frame 2788: 2786: 2783: 2782: 2780: 2776: 2758: 2755: 2753: 2750: 2748: 2745: 2743: 2740: 2738: 2735: 2733: 2730: 2728: 2725: 2723: 2720: 2718: 2715: 2713: 2710: 2708: 2705: 2703: 2700: 2698: 2695: 2693: 2690: 2688: 2685: 2683: 2680: 2678: 2675: 2673: 2670: 2668: 2665: 2663: 2660: 2658: 2655: 2653: 2650: 2648: 2645: 2643: 2640: 2638: 2635: 2633: 2630: 2628: 2625: 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1308: 1306: 1303: 1301: 1298: 1296: 1293: 1292: 1290: 1288: 1284: 1278: 1275: 1273: 1270: 1268: 1265: 1264: 1262: 1260: 1259:Mitochondrial 1256: 1250: 1247: 1245: 1242: 1240: 1237: 1236: 1234: 1232: 1228: 1225: 1223: 1219: 1216: 1212: 1207: 1203: 1199: 1195: 1191: 1184: 1179: 1177: 1172: 1170: 1165: 1164: 1161: 1149: 1148:Jacques Monod 1146: 1144: 1141: 1140: 1138: 1134: 1126: 1123: 1121: 1118: 1117: 1116: 1113: 1111: 1110:Translational 1108: 1104: 1101: 1099: 1096: 1094: 1091: 1090: 1089: 1086: 1084: 1081: 1077: 1074: 1072: 1069: 1068: 1067: 1064: 1060: 1057: 1056: 1055: 1052: 1051: 1049: 1047: 1043: 1033: 1030: 1028: 1025: 1023: 1020: 1018: 1015: 1014: 1012: 1008: 1002: 999: 997: 994: 992: 989: 988: 986: 982: 979: 977: 973: 963: 960: 958: 955: 953: 950: 948: 945: 943: 940: 939: 937: 935: 931: 925: 922: 920: 917: 915: 912: 911: 909: 905: 899: 896: 894: 891: 889: 886: 885: 883: 879: 876: 874: 873:Transcription 870: 862: 859: 857: 854: 852: 849: 848: 847: 844: 840: 836: 832: 829: 828: 827: 826:Central dogma 824: 822: 819: 818: 816: 814: 808: 804: 797: 792: 790: 785: 783: 778: 777: 774: 768: 766: 764: 762: 761: 753: 749: 744: 739: 736:(5): 709–22. 735: 731: 727: 720: 717: 712: 708: 703: 698: 694: 690: 686: 682: 678: 674: 670: 663: 660: 655: 651: 646: 641: 637: 633: 629: 625: 621: 614: 611: 606: 602: 597: 592: 589:(1): 135–40. 588: 584: 580: 573: 570: 565: 561: 556: 551: 547: 543: 539: 535: 531: 524: 521: 516: 512: 507: 502: 497: 492: 488: 484: 480: 473: 471: 469: 467: 465: 463: 461: 459: 455: 450: 446: 442: 438: 434: 430: 427:(6): 568–76. 426: 422: 415: 412: 407: 403: 399: 395: 390: 385: 381: 377: 373: 366: 363: 356: 352: 349: 347: 344: 342: 339: 338: 334: 332: 330: 326: 322: 314: 312: 310: 306: 302: 297: 294: 293: 283: 279: 277: 273: 270: 267: 265: 262: 261: 257: 253: 249: 245: 243: 239: 235: 232: 229: 227: 224: 223: 219: 218:rocaglamide A 215: 214:hippuristanol 211: 207: 203: 199: 197: 193: 189: 186: 183: 181: 178: 177: 174:Key Features 173: 170: 167: 164: 163: 160: 158: 154: 150: 146: 142: 138: 134: 129: 127: 123: 118: 115: 111: 103: 101: 95: 93: 91: 87: 86:cap-dependent 83: 79: 71: 69: 67: 63: 59: 56: 53: 49: 45: 41: 37: 33: 29: 21: 1857:Class 2/RF3 1665: 1626: 1538: 1456: 1375: 1329: 1125:irreversible 1010:Key elements 907:Key elements 821:Genetic code 811:Introduction 733: 729: 719: 676: 672: 662: 627: 623: 613: 586: 582: 572: 537: 533: 523: 486: 482: 424: 420: 414: 379: 375: 365: 318: 298: 292: 289: 130: 126:RNA helicase 107: 99: 75: 55:RNA helicase 31: 27: 26: 2795:Start codon 2580:28S subunit 2359:39S subunit 2159:40S subunit 1896:60S subunit 1887:Cytoplasmic 1351:SUI1 family 1194:translation 976:Translation 813:to genetics 624:Translation 46:to promote 2846:Categories 2800:Stop codon 2144:RRP15-like 1954:RPL10-like 1703:Bacterial/ 1320:Eukaryotic 1206:eukaryotic 1120:reversible 1083:lac operon 1059:imprinting 1054:Epigenetic 1046:Regulation 1001:Eukaryotic 947:5' capping 898:Eukaryotic 357:References 315:Regulation 128:activity. 112:binds the 1756:Archaeal/ 1231:Bacterial 1198:bacterial 991:Bacterial 888:Bacterial 540:: 58–71. 534:Biochimie 398:0092-8674 96:Structure 1847:Class 1 1287:Archaeal 1214:Proteins 1202:archaeal 1103:microRNA 1017:Ribosome 996:Archaeal 952:Splicing 924:Promoter 893:Archaeal 837: → 833: → 752:16337595 711:27309803 654:27335721 564:25742741 515:26324716 441:22664984 406:14675538 335:See also 171:Isoforms 168:MW (kDa) 104:Subunits 72:Function 52:DEAD-box 2836:Biology 2149:RSL24D1 1826:a/eEF-2 1765:a/eEF-1 856:RNA→DNA 851:RNA→RNA 839:Protein 702:4946961 681:Bibcode 645:4909409 605:9702200 555:4458453 506:4591800 449:9201095 165:Subunit 80:to the 2822:Portal 2317:RPS27A 2257:RPS15A 2196:RPS4Y2 2192:RPS4Y1 2186:RPS4 ( 2104:RPL37A 2094:RPL36A 2084:RPL35A 2044:RPL27A 2024:RPL23A 1999:RPL18A 1974:RPL13A 1949:RPL10A 1404:γ 1399:β 1392:kinase 1387:α 750:  709:  699:  673:Nature 652:  642:  603:  562:  552:  513:  503:  447:  439:  404:  396:  351:5' cap 309:eIF4G2 276:eIF4G3 272:eIF4G1 242:eIF4E3 238:eIF4E2 234:eIF4E1 208:, and 196:eIF4A3 192:eIF4A2 188:eIF4A1 139:, and 117:5' cap 82:5' cap 40:5' cap 2587:MRPS1 2366:MRPL1 2337:RACK1 2332:RPS30 2327:RPS29 2322:RPS28 2312:RPS27 2307:RPS26 2302:RPS25 2297:RPS24 2292:RPS23 2287:RPS21 2282:RPS20 2277:RPS19 2272:RPS18 2267:RPS17 2262:RPS16 2252:RPS15 2247:RPS14 2242:RPS13 2237:RPS12 2232:RPS11 2227:RPS10 2188:RPS4X 2182:RPS3A 2139:RPLP2 2134:RPLP1 2129:RPLP0 2124:RPL41 2119:RPL40 2114:RPL39 2109:RPL38 2099:RPL37 2089:RPL36 2079:RPL35 2074:RPL34 2069:RPL32 2064:RPL31 2059:RPL30 2054:RPL29 2049:RPL28 2039:RPL27 2034:RPL26 2029:RPL24 2019:RPL23 2014:RPL22 2009:RPL21 2004:RPL19 1994:RPL18 1989:RPL17 1984:RPL15 1979:RPL14 1969:RPL13 1964:RPL12 1959:RPL11 1944:RPL10 1929:RPL7A 1866:GSPT2 1861:GSPT1 1717:EF-Ts 1712:EF-Tu 1643:EIF5A 1446:eIF2D 1414:eIF2B 1409:eIF2A 1358:eIF1A 1277:MTIF3 1272:MTIF2 1267:MTIF1 984:Types 881:Types 445:S2CID 321:eIF4E 305:eIF4H 301:eIF4B 264:eIF4G 256:4EBP3 252:4EBP2 248:4EBP1 226:eIF4E 210:PDCD4 206:eIF4H 202:eIF4B 180:eIF4A 153:eIF4G 149:eIF4G 141:eIF4G 137:eIF4E 133:eIF4A 110:eIF4E 66:eIF4G 62:eIF4E 58:eIF4A 32:eIF4F 2222:RPS9 2217:RPS8 2212:RPS7 2207:RPS6 2202:RPS5 2177:RPS3 2172:RPS2 2167:RPSA 1939:RPL9 1934:RPL8 1924:RPL7 1919:RPL6 1914:RPL5 1909:RPL4 1904:RPL3 1851:eRF1 1747:GFM2 1742:GFM1 1737:TSFM 1732:EF-P 1727:EF-4 1722:EF-G 1677:EIF6 1667:eIF6 1638:EIF5 1628:eIF5 1540:eIF4 1458:eIF3 1377:eIF2 1341:eIF1 1331:eIF1 1310:aIF6 1305:aIF5 1300:aIF2 1295:aIF1 748:PMID 707:PMID 650:PMID 601:PMID 560:PMID 511:PMID 437:PMID 402:PMID 394:ISSN 376:Cell 325:mTOR 319:The 303:and 282:PABP 254:and 157:PABP 155:and 147:via 145:eIF3 1249:IF3 1244:IF2 1239:IF1 835:RNA 831:DNA 738:doi 697:PMC 689:doi 677:534 640:PMC 632:doi 591:doi 550:PMC 542:doi 538:114 501:PMC 491:doi 487:290 429:doi 384:doi 380:115 268:175 42:of 2848:: 2757:35 2752:34 2747:33 2742:32 2737:31 2732:30 2727:29 2722:28 2717:27 2712:26 2707:25 2702:24 2697:23 2692:22 2687:21 2682:20 2677:19 2672:18 2667:17 2662:16 2657:15 2652:14 2647:13 2642:12 2637:11 2632:10 2571:42 2566:41 2561:40 2556:39 2551:38 2546:37 2541:36 2536:35 2531:34 2526:33 2521:32 2516:31 2511:30 2506:29 2501:28 2496:27 2491:26 2486:25 2481:24 2476:23 2471:22 2466:21 2461:20 2456:19 2451:18 2446:17 2441:16 2436:15 2431:14 2426:13 2421:12 2416:11 2411:10 2194:, 2190:, 1802:P3 1797:P2 1792:P1 1770:A1 1655:5B 1572:E1 1204:, 1200:, 1192:: 746:. 734:20 732:. 728:. 705:. 695:. 687:. 675:. 671:. 648:. 638:. 626:. 622:. 599:. 585:. 581:. 558:. 548:. 536:. 532:. 509:. 499:. 485:. 481:. 457:^ 443:. 435:. 425:19 423:. 400:. 392:. 378:. 374:. 284:. 274:, 258:. 250:, 240:, 236:, 230:25 216:, 204:, 194:, 190:, 184:46 135:, 114:mG 2824:: 2807:/ 2627:9 2622:8 2617:7 2612:6 2607:5 2602:4 2597:3 2592:2 2406:9 2401:8 2396:7 2391:6 2386:5 2381:4 2376:3 2371:2 2198:) 1819:G 1814:E 1809:D 1787:B 1780:3 1775:2 1648:2 1616:H 1611:B 1604:3 1599:2 1594:1 1589:G 1582:3 1577:2 1565:3 1560:2 1555:1 1550:A 1528:M 1523:L 1518:K 1513:J 1508:I 1503:H 1498:G 1493:F 1488:E 1483:D 1478:C 1473:B 1468:A 1439:5 1434:4 1429:3 1424:2 1419:1 1363:Y 1346:B 1208:) 1196:( 1182:e 1175:t 1168:v 795:e 788:t 781:v 754:. 740:: 713:. 691:: 683:: 656:. 634:: 628:4 607:. 593:: 587:2 566:. 544:: 517:. 493:: 451:. 431:: 408:. 386:: 30:(

Index


protein complex
5' cap
messenger RNAs (mRNAs)
eukaryotic translation
DEAD-box
RNA helicase
eIF4A
eIF4E
eIF4G
small ribosomal subunit (40S)
5' cap
cap-dependent
cap-independent
eIF4E
mG
5' cap
43S preinitiation complex
RNA helicase
eIF4A
eIF4E
eIF4G
eIF3
eIF4G
eIF4G
PABP
eIF4A
eIF4A1
eIF4A2
eIF4A3

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