>gnl|CDD|133370 cd04170, EF-G_bact, Elongation factor G (EF-G) subfamily. Translocation is mediated by EF-G (also called translocase). The structure of EF-G closely resembles that of the complex between EF-Tu and tRNA. This is an example of molecular mimicry; a protein domain evolved so that it mimics the shape of a tRNA molecule. EF-G in the GTP form binds to the ribosome, primarily through the interaction of its EF-Tu-like domain with the 50S subunit. The binding of EF-G to the ribosome in this manner stimulates the GTPase activity of EF-G. On GTP hydrolysis, EF-G undergoes a conformational change that forces its arm deeper into the A site on the 30S subunit. To accommodate this domain, the peptidyl-tRNA in the A site moves to the P site, carrying the mRNA and the deacylated tRNA with it. The ribosome may be prepared for these rearrangements by the initial binding of EF-G as well. The dissociation of EF-G leaves the ribosome ready to accept the next aminoacyl-tRNA into the A site. This group contains only bacterial members. Length = 268

 Score = 39.1 bits (92), Expect = 0.002
 Identities = 39/149 (26%), Positives = 59/149 (39%), Gaps = 32/149 (21%)

Query: 4   TIAIVGAPNVGKSTLF----------NRL--VKKKMAVVGNHP-GITRDRLYGQAII--- 47
            IA+VG    GK+TL           +RL  V+    V    P  I R      ++    
Sbjct: 1   NIALVGHSGSGKTTLAEALLYATGAIDRLGSVEDGTTVSDYDPEEIKRKMSISTSVAPLE 60

Query: 48  -NGVIFNIVDTAGIAD--GKNCSIAKQMNDQTELAINEAHLILFLIDSKAGITPYDHAIT 104
             G   N++DT G AD  G           +T  A+  A   L ++ +++G+      + 
Sbjct: 61  WKGHKINLIDTPGYADFVG-----------ETRAALRAADAALVVVSAQSGVEVGTEKLW 109

Query: 105 SFLRKKNIPIIIVSNKMDTRIAQRNFYEI 133
            F  +  IP II  NKMD   A  +F + 
Sbjct: 110 EFADEAGIPRIIFINKMDRERA--DFDKT 136