>TIGR00490 aEF-2 translation elongation factor aEF-2; InterPro: IPR004543 Translation elongation factors are responsible for two main processes during protein synthesis on the ribosome , , . EF1A (or EF-Tu) is responsible for the selection and binding of the cognate aminoacyl-tRNA to the A-site (acceptor site) of the ribosome. EF2 (or EF-G) is responsible for the translocation of the peptidyl-tRNA from the A-site to the P-site (peptidyl-tRNA site) of the ribosome, thereby freeing the A-site for the next aminoacyl-tRNA to bind. Elongation factors are responsible for achieving accuracy of translation and both EF1A and EF2 are remarkably conserved throughout evolution. Elongation factor EF2 (EF-G) is a G-protein. It brings about the translocation of peptidyl-tRNA and mRNA through a ratchet-like mechanism: the binding of GTP-EF2 to the ribosome causes a counter-clockwise rotation in the small ribosomal subunit; the hydrolysis of GTP to GDP by EF2 and the subsequent release of EF2 causes a clockwise rotation of the small subunit back to the starting position , . This twisting action destabilises tRNA-ribosome interactions, freeing the tRNA to translocate along the ribosome upon GTP-hydrolysis by EF2. EF2 binding also affects the entry and exit channel openings for the mRNA, widening it when bound to enable the mRNA to translocate along the ribosome. This entry represents archaeal EF2 proteins (also known as aEF2), which are more similar to eukaryotic EF2 than to bacterial EF2 (or EFG), both in sequence similarity and in sharing with eukaryotes the property of having a diphthamide (modified His) residue at a conserved position. The diphthamide can be ADP-ribosylated by diphtheria toxin in the presence of NAD. More information about these proteins can be found at Protein of the Month: Elongation Factors .; GO: 0003746 translation elongation factor activity, 0005525 GTP binding, 0006414 translational elongation, 0005737 cytoplasm.

Probab=100.00 E-value=0 Score=902.82 Aligned_cols=646 Identities=31% Similarity=0.482 Sum_probs=549.0 Q ss_pred CCHHHEEEEEEECCCCCCHHHHHHHHHHHCCCCCCCCEECCCCEECCCHHHHHHHCCCEEEEEEEEEECCCCCCCEEEEE Q ss_conf 67102527999868788977899999998087321422017956137808898708537640799996077787138999 Q gi|254780264|r 5 CKIEDSRNFGIMAHIDAGKTTTTERILYYAGKSHKIGEVHDGSATMDWMEQEQERGITITSASTTVFWPGRDGGQKKLTI 84 (701) Q Consensus 5 ~~~e~iRNv~iiaHvd~GKTTL~d~LL~~~g~i~~~g~v~~g~~~~D~~~~E~eRgITi~ss~~sl~~~~~~~~~~~iNl 84 (701) T Consensus 14 ~~~~~irniGi~ahidhGkttlsdnllaGaGmis~--elaG~q~~ldfde~e~~rGiti~aanvsmvh~y-eG~~ylinl 90 (724) T TIGR00490 14 YKPEFIRNIGIVAHIDHGKTTLSDNLLAGAGMISE--ELAGEQLYLDFDEQEQERGITIDAANVSMVHEY-EGNEYLINL 90 (724) T ss_pred HHHHHHHHEEEEEEECCCCCHHHHHHHHCCCHHHH--HHCCCCEEECCCHHHHHCCCEEEEEEEEEEEEE-CCCCEEEEE T ss_conf 30122210003786317751122344421332345--405641000244135237726764115676531-475024333 Q ss_pred EECCCCCCCHHHHHHHHHHHCEEEEEEECCCCCCHHHHHHHHHHHHCCCCEEEEECCCCCCCCCHHHHHHHHCCCCCC-- Q ss_conf 817987552899999998604569999558888834799999998739978999817676587555566641111026-- Q gi|254780264|r 85 IDTPGHVDFTMEVERSIRVTDGAIALLDSNAGVEPQTETVWRQADKYSVPRVIFCNKMDKMGADFYRSVEMISSRLGA-- 162 (701) Q Consensus 85 IDTPGH~DF~~Ev~~aL~~~DgailvVDa~eGv~~qT~~vlr~~~~~~lp~ilvINKiDr~~~d~~~~l~~i~~~l~~-- 162 (701) T Consensus 91 idtPGhvdfGGdvtramra~dG~~vvv~aveG~mPqtetvlrqal~e~v~Pvlf~nkvdrli~el~l~~~~lq~r~~k~i 170 (724) T TIGR00490 91 IDTPGHVDFGGDVTRAMRAVDGAIVVVCAVEGVMPQTETVLRQALKENVKPVLFINKVDRLINELKLTPEELQERLIKII 170 (724) T ss_pred ECCCCCCCCCCHHHHHHHHHCCEEEEEEECCCCCCCHHHHHHHHHHHCCCEEEEEHHHHHHHHHHCCCHHHHHHHHHHHH T ss_conf 14886210562488887764763899950256576157899999873187067723478888862468889999999999 Q ss_pred ---CCCEEC-CCCCCCCCCCEEEEEHHHHHHCCCCCCCCCCCEEEEECHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCC Q ss_conf ---833000-2345556653024422344311452226985138740043178899999988630023457899986327 Q gi|254780264|r 163 ---NPLVIQ-LPVGSESNFQGVIDLVEMKALLWKNEDLGSSWDVVEIPEDMKDSANSYRDKMIESIVELDDSAMDSYLQG 238 (701) Q Consensus 163 ---~~~~~~-~p~~~~~~~~g~id~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~lle~i~~~dd~~~~~~l~~ 238 (701) T Consensus 171 ~~~n~li~~m~P~~~~---~~W~~~v~~Gs~afGsa~~nWa~~v---P~~-~~~Gi~f~-~~~~------------~~~- 229 (724) T TIGR00490 171 AEVNKLIKKMAPEEFK---DKWKVRVEDGSVAFGSAYYNWAISV---PIM-KKTGITFK-DIYK------------YIK- 229 (724) T ss_pred HHHHHHHHHCCCCCHH---CCCEEEECCCCCHHHHHHHHHEEEC---CCC-CCCCCCHH-HHHH------------HHH- T ss_conf 9999999741761000---0004765156410112221000204---430-01377599-9999------------863- Q ss_pred CCCCHHHHHHHHCCEEECCEEEECCCCCEECCCCHHHHHHHHHHHCCCHHHEECCCCCCCCCCCC------CCCCCCCCC Q ss_conf 78998898730000031010032343100012210248898987178621300012222456752------101123456 Q gi|254780264|r 239 ESFSSDRIRSLIRLGTISVKFFPVLCGSSFKNKGVQPLLDAVVDYLPSPLDVRAIKGVDVKSNSE------IDVSAVDSS 312 (701) Q Consensus 239 ~~~~~~~l~~~l~~~~~~~~~~pv~~gsa~~~~Gv~~LLd~i~~~lPsP~~~~~~~~~~~~~~~~------~~~~~~~~~ 312 (701) T Consensus 230 ----e~~~~ela~k-------~Pl----------~~v~l~mv~~hlPsP~e~q~~r~~~~W~Gd~~se~G~am~~~dP~G 288 (724) T TIGR00490 230 ----EDKQKELAKK-------APL----------HQVVLDMVIKHLPSPAEAQKYRIPVIWKGDLNSEAGKAMLNCDPEG 288 (724) T ss_pred ----CCHHHHHHHH-------CCH----------HHHHHHHHHHHCCCCHHHHHHHHHHHEECCCCCHHCCHHCCCCCCC T ss_conf ----0114557640-------658----------8999999997448962244401001010465400054210048998 Q ss_pred CCCEECCCCCCCCCCCCEEHHHHHCCCCCCCCEEEEECCCCCCEEHHHHHHHCCCEEEEEECCCCCEEEECCCCCCCCCC Q ss_conf 54201033211654671000011013345683689832655411104532104744542003567326413874443211 Q gi|254780264|r 313 PLSMLAFKVMADSFVGSLTFCRIYSGKISKGDSLLNTVKGKKERVGRMLQMHSNSREDIDEAYCGDIIALAGLKETTTGD 392 (701) Q Consensus 313 pl~~~v~K~~~d~~~G~~a~~RV~SGtL~~gd~i~~~~~~~~~kV~~l~~~~g~~~~~v~~a~aGdIv~I~Gl~~~~~gd 392 (701) T Consensus 289 P~a~~~t~~~~~~~aG~~~~~r~y~G~i~~G~e~y~v~~~~k~~~q~v~~ymGP~r~~~d~~~aGni~a~~G~k~a~aG~ 368 (724) T TIGR00490 289 PLAVMITKIVVDKHAGEVAVGRLYSGAIKKGSEVYLVDRKAKARIQQVGVYMGPERVEVDEIPAGNIVAVVGLKEAVAGE 368 (724) T ss_pred CEEEEEEEEEEECCCCCEEEEEEECCEECCCCEEEEECCHHHCCEEEEEEEECCEECCCCCCCCCCEEEEEECCCCCCCC T ss_conf 61445565566036681677555315003686689864300021124667766702012422677568874032111453 Q ss_pred CCCCCCCC-CCCCCCC-CCCCEEEEEEEECCCCCCHHHHHHHHHHHCCCCCEEEEEECCCCEEEEEECCHHHHHHHHHHH Q ss_conf 01277884-1015663-665213577761564322025788885410274201445045754687606647899999998 Q gi|254780264|r 393 TLCDPSRP-IVLERMD-FPEPVIQIAIEPKSKGDQERMSLALSRLVAEDPSLRVSMDPNSGQTNLSGMGELHLEIIVDRM 470 (701) Q Consensus 393 Tl~~~~~~-~~~~~~~-~~~Pvv~vaIep~~~~d~~kL~~~L~~L~~~Dp~l~v~~~~etGE~il~g~GElhLev~l~~L 470 (701) T Consensus 369 t~C~~~~~~~~fe~~~h~sePv~t~a~eakn~~dlPklievlr~~~~edPt~~~~~neetGehl~sGmGelh~e~~~~~~ 448 (724) T TIGR00490 369 TICSTDKKIKPFEAIKHISEPVVTVAIEAKNTKDLPKLIEVLRQVAKEDPTVKVEINEETGEHLISGMGELHLEIIVKKI 448 (724) T ss_pred CCCCCHHHHHHHHHHHHCCCCEEEEEEECCCCCCCHHHHHHHHHHHCCCCEEEEEEECCCCCHHHHCCCHHHHHHHHHHH T ss_conf 00252123213343232047537999714675440589999997413497279997044451233122223345566566 Q ss_pred HHH-CCCCCEECCCCCCCCCCCCCCEEEEEEEECCCCCCCCCEEEEEEECCCCC--------C----------------- Q ss_conf 741-11332010541011014442103554321158987530278999702888--------8----------------- Q gi|254780264|r 471 LRE-FKVDANVGAPYVSYRESVTKSCVHDYIHKKQSGGAGQFAKVKIAFEPNPD--------G----------------- 524 (701) Q Consensus 471 ~~~-f~iei~vs~P~V~yrEti~~~~~~~~~~~~~~~~~~~~~~v~~~~eP~~~--------g----------------- 524 (701) T Consensus 449 ~~~~~~~~~~~~~Pivv~retv~G~~~~--ve~ksPnkhn---~~y~~~eP~~~~v~q~~~eG~~~~~~~~~k~~~~~~~ 523 (724) T TIGR00490 449 REKDAGVEVETSEPIVVYRETVTGTSPV--VEGKSPNKHN---RFYIVVEPLEESVLQAFKEGKIKDVKVKKKLDDEIAK 523 (724) T ss_pred HHHHCCCEEEECCCEEEEECCCCCCCCC--CCCCCCCCCC---EEEEEEECCHHHHHHHHHCCCCEEHHHHHHHHHHHHH T ss_conf 4411230376448568971010476663--2577872215---4789980633799988635850001344456789999 Q ss_pred -------------------CEEEECCEEECCEEHHHHHHHHHHHHHHHHHHCCCCCCEEEEEEEEEEEEEECCCCCCHH- Q ss_conf -------------------647981200267002433325677899999718822550331289999511168767603- Q gi|254780264|r 525 -------------------DDFVFESKIVGGAIPKEYIPGVRKGIESMLSSGPLAGFPMLGMKVTLLDGDYHDVDSSVL- 584 (701) Q Consensus 525 -------------------~~~~f~~~~~~~~~~~~~~~~v~~g~~~a~~~GpL~~epi~gv~v~l~d~~~~~~~s~~~- 584 (701) T Consensus 524 ~l~~aG~~~eea~~~~~~ye~n~~~~~t~Gi~~l~e~~el~~~Gf~~am~~GP~a~e~~~G~k~kl~d~~~heda~hrGP 603 (724) T TIGR00490 524 ELIEAGLDKEEAKRVEEVYEGNLFINVTRGIQYLDEVKELILEGFKEAMRNGPVAKEKVMGVKVKLVDAKLHEDAVHRGP 603 (724) T ss_pred HHHHCCCCHHHHHHHHHHHCCCEEEEHHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCEEEEEEEEEEECHHHHCCCC T ss_conf 99872788678889998740531342245578899999999998999974288421033405899863110022312470 Q ss_pred -HHHHHHHHHHHHHHHHCCCEEEEEEEEEEEEECHHHHHHHHHHHHHCCEEEEEEECCCCEEEEEEEEEHHHHCCHHHHH Q ss_conf -3799999999999984898898017899998385774579999972770797453589839999996043733847887 Q gi|254780264|r 585 -AFEIAARACFREAASKMGVQLLEPLMKVEVTVPAEYVGDVIGDLSSRRGQIQGQENRSVYVVIDAHVPLSCMFKYVDSL 663 (701) Q Consensus 585 -~~~~a~~~a~~~a~~~a~p~LlEPi~~~eI~~p~~~~g~v~~~L~~Rrg~i~~~~~~~~~~~i~a~iP~~e~~gf~~~L 663 (701) T Consensus 604 aq~~Pa~r~~i~~a~~~a~P~lleP~q~~~i~~Pqd~mG~~~rei~~rrGqi~~m~~eGdm~~~~~~~Pv~emfGfaG~i 683 (724) T TIGR00490 604 AQVIPAVRKGIFAAMLQAEPVLLEPIQKVFINVPQDFMGAATREIQNRRGQILEMKQEGDMVTIKAKVPVAEMFGFAGAI 683 (724) T ss_pred HHHHHHHHHHHHHHHHHCCCCHHCCCEEEEEECCHHHHHHHHHHHHCCCCCEEEEECCCCEEEEEECCCHHHHHCCCCCC T ss_conf 25658889999998850585021321001341551455678876512575177640478579997247757740210010 Q ss_pred HHHHCCEEEEEEEECCEEECCHHHHHHHHHHHHHHCC Q ss_conf 8630863798999629040885599999999732026 Q gi|254780264|r 664 RSMSQGRGQYTMIFDHYAPVPAHVSKEIQEKYSVVKS 700 (701) Q Consensus 664 R~~T~G~a~~~~~F~~~~~vp~~~~~~~~~~~~~~~~ 700 (701) T Consensus 684 r~at~G~~~Ws~e~aG~e~~P~~l~~~~~~~~r~rkG 720 (724) T TIGR00490 684 RGATEGRCLWSTEFAGFEKVPRELQEELVKEVRKRKG 720 (724) T ss_pred CCCCCCCEEEEECCCCHHHHHHHHHHHHHHHHHHCCC T ss_conf 1235772466411011453259999999999985048

HHsearch alignment for GI: 254780264 and conserved domain: TIGR00490