>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=611.33 Aligned_cols=467 Identities=31% Similarity=0.546 Sum_probs=411.1 Q ss_pred CCCCCCCEEEEECCCCCCHHHHHHHHHHHCCCCCCCCCCCCEECCCCHHHHHCCCEEEEEEEEEE--E--CCEEEEEECC Q ss_conf 68024314999854689877889999998396142322000003885779870960646799999--8--9979999728 Q gi|254780233|r 14 LGYMQIRNIAIIAHVDHGKTTLVDELLKQSGVFRDNQRVSERVMDCNDLEKERGITILAKVTSIV--W--NDVRINIVDT 89 (624) Q Consensus 14 ~~~~~IRNiaIiaHvDhGKTTL~d~LL~~sG~~~~~~~v~~~vmD~~~~EreRGITI~a~~~~~~--~--~~~~iNiiDT 89 (624) T Consensus 14 ~~~~~irniGi~ahidhGkttlsdnllaGaGmis~elaG~q~~ldfde~e~~rGiti~aanvsmvh~yeG~~ylinlidt 93 (724) T TIGR00490 14 YKPEFIRNIGIVAHIDHGKTTLSDNLLAGAGMISEELAGEQLYLDFDEQEQERGITIDAANVSMVHEYEGNEYLINLIDT 93 (724) T ss_pred HHHHHHHHEEEEEEECCCCCHHHHHHHHCCCHHHHHHCCCCEEECCCHHHHHCCCEEEEEEEEEEEEECCCCEEEEEECC T ss_conf 30122210003786317751122344421332345405641000244135237726764115676531475024333148 Q ss_pred CCCCCCHHHHHHHHHHHCEEEEEEECCCCCCHHHHHHHHHHHHCCCCEEEEEECCCCC-----------CCCHHHHHHHH Q ss_conf 9875407999999874217899997687886478999999997299789999754366-----------74025689999 Q gi|254780233|r 90 PGHADFGGEVERILCMVESVVVLVDAAEGPMPQTKFVVGKALKIGLRPIVVVNKVDRS-----------DARADEVINEV 158 (624) Q Consensus 90 PGH~DF~gEVer~l~~~DgaiLvVdA~eGv~~QT~~vl~~A~~~~l~~IvvINKiDr~-----------~a~~~~v~~ei 158 (624) T Consensus 94 PGhvdfGGdvtramra~dG~~vvv~aveG~mPqtetvlrqal~e~v~Pvlf~nkvdrli~el~l~~~~lq~r~~k~i~~~ 173 (724) T TIGR00490 94 PGHVDFGGDVTRAMRAVDGAIVVVCAVEGVMPQTETVLRQALKENVKPVLFINKVDRLINELKLTPEELQERLIKIIAEV 173 (724) T ss_pred CCCCCCCCHHHHHHHHHCCEEEEEEECCCCCCCHHHHHHHHHHHCCCEEEEEHHHHHHHHHHCCCHHHHHHHHHHHHHHH T ss_conf 86210562488887764763899950256576157899999873187067723478888862468889999999999999 Q ss_pred HHHHHHCCCCH----HHCC---HHHHHHHHHCCEECCCCCCCCCCCC------------------------HHHHHHHHC Q ss_conf 98886226730----1104---2668878865916467422334864------------------------135553210 Q gi|254780233|r 159 FDLFSALDATD----AQLD---FPILYGSGRFGWMSDSSDGSRDQGM------------------------VPLLNLIVD 207 (624) Q Consensus 159 ~dlf~~l~a~d----e~ld---~Pv~~~Sa~~G~~~~~~~~~~~~gl------------------------~~Lld~Ii~ 207 (624) T Consensus 174 n~li~~m~P~~~~~~W~~~v~~Gs~afGsa~~nWa~~vP~~~-~~Gi~f~~~~~~~~e~~~~ela~k~Pl~~v~l~mv~~ 252 (724) T TIGR00490 174 NKLIKKMAPEEFKDKWKVRVEDGSVAFGSAYYNWAISVPIMK-KTGITFKDIYKYIKEDKQKELAKKAPLHQVVLDMVIK 252 (724) T ss_pred HHHHHHCCCCCHHCCCEEEECCCCCHHHHHHHHHEEECCCCC-CCCCCHHHHHHHHHCCHHHHHHHHCCHHHHHHHHHHH T ss_conf 999974176100000047651564101122210002044300-1377599999986301145576406588999999997 Q ss_pred CCCCCC--------------------------CCCCHHHCCCCCCCCCCCCCEEEEEEECCCCCCCCCEEEEECCCCCCE Q ss_conf 245422--------------------------332000001111013677734999996078051598899960578501 Q gi|254780233|r 208 HVPPPV--------------------------ISEGEFKMIGTILEKDPFLGRIVTGRIHSGTIKSNQNIKALSPDGALV 261 (624) Q Consensus 208 ~iP~P~--------------------------~~e~pl~~~V~~i~~d~y~Gria~gRV~sGtlk~Gd~V~vl~~~g~~~ 261 (624) T Consensus 253 hlPsP~e~q~~r~~~~W~Gd~~se~G~am~~~dP~GP~a~~~t~~~~~~~aG~~~~~r~y~G~i~~G~e~y~v~~~---- 328 (724) T TIGR00490 253 HLPSPAEAQKYRIPVIWKGDLNSEAGKAMLNCDPEGPLAVMITKIVVDKHAGEVAVGRLYSGAIKKGSEVYLVDRK---- 328 (724) T ss_pred HCCCCHHHHHHHHHHHEECCCCCHHCCHHCCCCCCCCEEEEEEEEEEECCCCCEEEEEEECCEECCCCEEEEECCH---- T ss_conf 4489622444010010104654000542100489986144556556603668167755531500368668986430---- Q ss_pred EECCCCCEEEECCCCCCCCCCCCCCCCCCCCCCCCCCCCCEECCCCC-CCCCCCCC-CCCCCEEEEEECCCCCCCCCCCC Q ss_conf 21145530110366534441125455432222332101221105565-21123366-66542157861268655444432 Q gi|254780233|r 262 EVGRVSKILAFRGIDRQPIDEAHAGDIVSIAGLVKATVADTFCDPSI-DEPLKAQP-IDPPTVTMTFGVNDSPLAGTEGD 339 (624) Q Consensus 262 ~~~kV~~L~~~~G~~r~~v~ea~AGDIvaIaGl~~~~iGDTL~~~~~-p~~Lp~i~-i~~Ptis~~f~vn~sP~ag~eg~ 339 (624) T Consensus 329 ~k~~~q~v~~ymGP~r~~~d~~~aGni~a~~G~k~a~aG~t~C~~~~~~~~fe~~~h~sePv~t~a~eakn-------~~ 401 (724) T TIGR00490 329 AKARIQQVGVYMGPERVEVDEIPAGNIVAVVGLKEAVAGETICSTDKKIKPFEAIKHISEPVVTVAIEAKN-------TK 401 (724) T ss_pred HHCCEEEEEEEECCEECCCCCCCCCCEEEEEECCCCCCCCCCCCCHHHHHHHHHHHHCCCCEEEEEEECCC-------CC T ss_conf 00211246677667020124226775688740321114530025212321334323204753799971467-------54 Q ss_pred CHHHHHHHHHHHHHHCCCCEEEEEECCCCCEEEEEECCHHHHHHHHHHHHHC--CEEEECCCCEEEEEEE---------- Q ss_conf 1017889999999730283799998599975999963645688887412334--8033015744899820---------- Q gi|254780233|r 340 KVTSRMIRDRLFKEAEGNIALKIEESSSKDAFFVSGRGELQLAVLIETMRRE--GFELAVSRPRVVIKKE---------- 407 (624) Q Consensus 340 ~~ts~~l~~rL~ke~~~dvsL~ve~~~~~~~~~v~GrGeLHL~IliE~mRRE--G~E~~vs~P~V~~k~~---------- 407 (624) T Consensus 402 dl--Pklievlr~~~~edPt~~~~~neetGehl~sGmGelh~e~~~~~~~~~~~~~~~~~~~Pivv~retv~G~~~~ve~ 479 (724) T TIGR00490 402 DL--PKLIEVLRQVAKEDPTVKVEINEETGEHLISGMGELHLEIIVKKIREKDAGVEVETSEPIVVYRETVTGTSPVVEG 479 (724) T ss_pred CC--HHHHHHHHHHHCCCCEEEEEEECCCCCHHHHCCCHHHHHHHHHHHHHHHCCCEEEECCCEEEEECCCCCCCCCCCC T ss_conf 40--5899999974134972799970444512331222233455665664411230376448568971010476663257 Q ss_pred -------------------------------------------------------------------------------- Q ss_conf -------------------------------------------------------------------------------- Q gi|254780233|r 408 -------------------------------------------------------------------------------- 407 (624) Q Consensus 408 -------------------------------------------------------------------------------- 407 (624) T Consensus 480 ksPnkhn~~y~~~eP~~~~v~q~~~eG~~~~~~~~~k~~~~~~~~l~~aG~~~eea~~~~~~ye~n~~~~~t~Gi~~l~e 559 (724) T TIGR00490 480 KSPNKHNRFYIVVEPLEESVLQAFKEGKIKDVKVKKKLDDEIAKELIEAGLDKEEAKRVEEVYEGNLFINVTRGIQYLDE 559 (724) T ss_pred CCCCCCCEEEEEEECCHHHHHHHHHCCCCEEHHHHHHHHHHHHHHHHHCCCCHHHHHHHHHHHCCCEEEEHHHHHHHHHH T ss_conf 78722154789980633799988635850001344456789999998727886788899987405313422455788999 Q ss_pred --------------------------------------------------------------CCEECCEEEEEEEECCHH Q ss_conf --------------------------------------------------------------882604168888731323 Q gi|254780233|r 408 --------------------------------------------------------------GDSLLEPIEEVVIDVDEE 425 (624) Q Consensus 408 --------------------------------------------------------------dg~~lEPie~v~I~vp~e 425 (624) T Consensus 560 ~~el~~~Gf~~am~~GP~a~e~~~G~k~kl~d~~~heda~hrGPaq~~Pa~r~~i~~a~~~a~P~lleP~q~~~i~~Pqd 639 (724) T TIGR00490 560 VKELILEGFKEAMRNGPVAKEKVMGVKVKLVDAKLHEDAVHRGPAQVIPAVRKGIFAAMLQAEPVLLEPIQKVFINVPQD 639 (724) T ss_pred HHHHHHHHHHHHHHCCCCCCCCCCEEEEEEEEEEECHHHHCCCCHHHHHHHHHHHHHHHHHCCCCHHCCCEEEEEECCHH T ss_conf 99999998999974288421033405899863110022312470256588899999988505850213210013415514 Q ss_pred HHHHHHHHHHHCCCEECCCCCCCCCEEEEEEEECHHHHHHHHHHHHHHCCCCEEEEEEEECCCCCCCCCC Q ss_conf 3107899887435401042136898499999961335656889988532761678888705301357878 Q gi|254780233|r 426 HSGAVVQKMTLHKSEMIELRPSGTGRVRLVFLSPTRGLIGYQSQLMTDTRGTAIMNRLFHSYQPHKGEIG 495 (624) Q Consensus 426 y~G~Vi~~l~~RrG~i~~m~~~~~g~~~l~~~vP~r~l~g~~~~l~s~T~G~g~~~~~f~~Y~p~~g~i~ 495 (624) T Consensus 640 ~mG~~~rei~~rrGqi~~m~~eGd-m~~~~~~~Pv~emfGfaG~ir~at~G~~~Ws~e~aG~e~~P~~l~ 708 (724) T TIGR00490 640 FMGAATREIQNRRGQILEMKQEGD-MVTIKAKVPVAEMFGFAGAIRGATEGRCLWSTEFAGFEKVPRELQ 708 (724) T ss_pred HHHHHHHHHHCCCCCEEEEECCCC-EEEEEECCCHHHHHCCCCCCCCCCCCCEEEEECCCCHHHHHHHHH T ss_conf 556788765125751776404785-799972477577402100101235772466411011453259999

HHsearch alignment for GI: 254780233 and conserved domain: TIGR00490