>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 = 71.4 bits (176), Expect = 1e-12
 Identities = 37/136 (27%), Positives = 60/136 (44%), Gaps = 20/136 (14%)

Query: 386 VTIMGHVDHGKTSLLDAI--------RKADVAKG---------EIG-GITQHIGAYQVAY 427
           + ++GH   GKT+L +A+        R   V  G         EI   ++       + +
Sbjct: 2   IALVGHSGSGKTTLAEALLYATGAIDRLGSVEDGTTVSDYDPEEIKRKMSISTSVAPLEW 61

Query: 428 QGKNITFLDTPGHAAFYEMRARGA-RVTDIAVLVLAADEEIMPQAIESINHAKAADVSII 486
           +G  I  +DTPG+A F     R A R  D A++V++A   +     +    A  A +  I
Sbjct: 62  KGHKINLIDTPGYADFVG-ETRAALRAADAALVVVSAQSGVEVGTEKLWEFADEAGIPRI 120

Query: 487 VAINKIDKLGADPQKV 502
           + INK+D+  AD  K 
Sbjct: 121 IFINKMDRERADFDKT 136