>gnl|CDD|133286 cd01886, EF-G, 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 both eukaryotic and bacterial members. Length = 270

 Score = 55.6 bits (135), Expect = 2e-08
 Identities = 43/130 (33%), Positives = 63/130 (48%), Gaps = 19/130 (14%)

Query: 18  IGHVDHGKTTLTAAITKYYSEEKKEYGDI-------DSAPEEKLRGITIATAHVSYE-TD 69
           I H+D GKTT T  I  YY+    + G++       D   +E+ RGITI +A  +    D
Sbjct: 5   IAHIDAGKTTTTERIL-YYTGRIHKIGEVHGGGATMDFMEQERERGITIQSAATTCFWKD 63

Query: 70  KRFYSHIDCPGHADYVKNMITGATQADGAILVCAAEDGPKPQT----REHILLARQIGIS 125
            R  + ID PGH D+   +       DGA+ V  A  G +PQT    R+    A +  + 
Sbjct: 64  HRI-NIIDTPGHVDFTIEVERSLRVLDGAVAVFDAVAGVEPQTETVWRQ----ADRYNVP 118

Query: 126 SIVVYMNKVD 135
            I  ++NK+D
Sbjct: 119 RI-AFVNKMD 127