>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 = 70.7 bits (174), Expect = 7e-13
 Identities = 40/130 (30%), Positives = 61/130 (46%), Gaps = 9/130 (6%)

Query: 18  IGHVDHGKTTLTAAITKYYSEEKKEYGDI-------DSAPEEKLRGITIATAHVSYETDK 70
           +GH   GKTTL  A+  Y +      G +       D  PEE  R ++I+T+    E   
Sbjct: 5   VGHSGSGKTTLAEALL-YATGAIDRLGSVEDGTTVSDYDPEEIKRKMSISTSVAPLEWKG 63

Query: 71  RFYSHIDCPGHADYVKNMITGATQADGAILVCAAEDGPKPQTREHILLARQIGISSIVVY 130
              + ID PG+AD+V         AD A++V +A+ G +  T +    A + GI  I+  
Sbjct: 64  HKINLIDTPGYADFVGETRAALRAADAALVVVSAQSGVEVGTEKLWEFADEAGIPRIIF- 122

Query: 131 MNKVDAVDDD 140
           +NK+D    D
Sbjct: 123 INKMDRERAD 132