HHsearch alignment for GI: 254780263 and conserved domain: TIGR00490
>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=1.7e-37 Score=251.49 Aligned_cols=276 Identities=28% Similarity=0.418 Sum_probs=202.6
Q ss_pred EEEEEECCCCCHHHHHHHHHHHHH----HHHHCCCCCCCCHHHHHCCCEEEEEEEE----EECCCEEEEEEECCCCHHHH
Q ss_conf 999990468988789999998764----4420013126868698629206378999----82199089998478730246
Q gi|254780263|r 14 GLSTIGHVDHGKTTLTAAITKYYS----EEKKEYGDIDSAPEEKLRGITIATAHVS----YETDKRFYSHIDCPGHADYV 85 (392)
Q Consensus 14 ni~~iGhvd~GKSTL~~~L~~~~~----~~~~~~~~~D~~~~E~~rGiTi~~~~~~----~~~~~~~i~iiD~PGH~~f~ 85 (392)
T Consensus 21 niGi~ahidhGkttlsdnllaGaGmis~elaG~q~~ldfde~e~~rGiti~aanvsmvh~yeG~~ylinlidtPGhvdfG 100 (724)
T TIGR00490 21 NIGIVAHIDHGKTTLSDNLLAGAGMISEELAGEQLYLDFDEQEQERGITIDAANVSMVHEYEGNEYLINLIDTPGHVDFG 100 (724)
T ss_pred HEEEEEEECCCCCHHHHHHHHCCCHHHHHHCCCCEEECCCHHHHHCCCEEEEEEEEEEEEECCCCEEEEEECCCCCCCCC
T ss_conf 00037863177511223444213323454056410002441352377267641156765314750243331488621056
Q ss_pred HHHHHHHHCCCCEEEEECCCCCCCCCHHHHHHHHHHCCCCCEEEEECCCCCC------CC---HHHHHHCCCCCCEEEEE
Q ss_conf 7798774002331452012344332106778888631876023310023335------61---22211012321001110
Q gi|254780263|r 86 KNMITGATQADGAILVCAAEDGPKPQTREHILLARQIGISSIVVYMNKVDAV------DD---DELLDISEYEIRDLLKE 156 (392)
Q Consensus 86 ~~mi~g~~~~D~ailvVda~~G~~~QT~eh~~l~~~lgi~~iIv~iNKmD~v------~~---~~~~~~i~~~i~~~l~~ 156 (392)
T Consensus 101 Gdvtramra~dG~~vvv~aveG~mPqtetvlrqal~e~v~Pv-lf~nkvdrli~el~l~~~~lq~r~~k~i~~~n~li~~ 179 (724)
T TIGR00490 101 GDVTRAMRAVDGAIVVVCAVEGVMPQTETVLRQALKENVKPV-LFINKVDRLINELKLTPEELQERLIKIIAEVNKLIKK 179 (724)
T ss_pred CHHHHHHHHHCCEEEEEEECCCCCCCHHHHHHHHHHHCCCEE-EEEHHHHHHHHHHCCCHHHHHHHHHHHHHHHHHHHHH
T ss_conf 248888776476389995025657615789999987318706-7723478888862468889999999999999999974
Q ss_pred E---EEEEEE-------ECCCCEEEEEEECCCCCCCC---------------------CC---CCCHHHHHHCCCCCCC-
Q ss_conf 1---453221-------02331146764114445652---------------------12---3320344310252222-
Q gi|254780263|r 157 H---KYSDDT-------PIIRGSALCALQGTNKELGE---------------------DS---IHALMKAVDTHIPTPQ- 201 (392)
Q Consensus 157 ~---~~~~~~-------pii~~sa~~g~~~~n~~~~~---------------------~~---~~~Ll~~i~~~~~~p~- 201 (392)
T Consensus 180 m~P~~~~~~W~~~v~~Gs~afGsa~~nWa~~vP~~~~~Gi~f~~~~~~~~e~~~~ela~k~Pl~~v~l~mv~~hlPsP~e 259 (724)
T TIGR00490 180 MAPEEFKDKWKVRVEDGSVAFGSAYYNWAISVPIMKKTGITFKDIYKYIKEDKQKELAKKAPLHQVVLDMVIKHLPSPAE 259 (724)
T ss_pred CCCCCHHCCCEEEECCCCCHHHHHHHHHEEECCCCCCCCCCHHHHHHHHHCCHHHHHHHHCCHHHHHHHHHHHHCCCCHH
T ss_conf 17610000004765156410112221000204430013775999999863011455764065889999999974489622
Q ss_pred ------------------------CCCCCCCCEECCCCCCCCCCCCCEEEEEEECCCCCCCEEEEEECCCCCCCEEEECC
Q ss_conf ------------------------10000110000000135544543014874245348967999506874321254121
Q gi|254780263|r 202 ------------------------RSLDAPFLMHIEGSCGIEGRGTVVTGCIKRGRIKAGSDVEIIGMGGKKLKVKCTDV 257 (392)
Q Consensus 202 ------------------------~~~~~p~r~~I~~vf~i~g~G~Vv~GrV~sG~l~~Gd~i~i~p~~~~~~~~kv~si 257 (392)
T Consensus 260 ~q~~r~~~~W~Gd~~se~G~am~~~dP~GP~a~~~t~~~~~~~aG~~~~~r~y~G~i~~G~e~y~v~~~~k-~~~q~v~~ 338 (724)
T TIGR00490 260 AQKYRIPVIWKGDLNSEAGKAMLNCDPEGPLAVMITKIVVDKHAGEVAVGRLYSGAIKKGSEVYLVDRKAK-ARIQQVGV 338 (724)
T ss_pred HHHHHHHHHEECCCCCHHCCHHCCCCCCCCEEEEEEEEEEECCCCCEEEEEEECCEECCCCEEEEECCHHH-CCEEEEEE
T ss_conf 44401001010465400054210048998614455655660366816775553150036866898643000-21124667
Q ss_pred CCC--CCCCCCCCCCHHHHHHHCCCCCCEEECHHEEECCC
Q ss_conf 001--21144321001366641124543220211773267
Q gi|254780263|r 258 EMF--RKKLDEAIAGDNVGLLLRGVNRADVPRGRVVCAPG 295 (392)
Q Consensus 258 ~~~--~~~v~~a~aGd~v~l~Lkgi~~~di~rGdvl~~~~ 295 (392)
T Consensus 339 ymGP~r~~~d~~~aGni~a~~----G~k~a~aG~t~C~~~ 374 (724)
T TIGR00490 339 YMGPERVEVDEIPAGNIVAVV----GLKEAVAGETICSTD 374 (724)
T ss_pred EECCEECCCCCCCCCCEEEEE----ECCCCCCCCCCCCCH
T ss_conf 766702012422677568874----032111453002521