>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 =  127 bits (321), Expect = 1e-29
 Identities = 59/140 (42%), Positives = 81/140 (57%), Gaps = 2/140 (1%)

Query: 21  NIAIIAHVDHGKTTLVDELLKQSGVFRDNQRVSER--VMDCNDLEKERGITILAKVTSIV 78
           NI IIAH+D GKTT  + +L  +G       V      MD  + E+ERGITI +  T+  
Sbjct: 1   NIGIIAHIDAGKTTTTERILYYTGRIHKIGEVHGGGATMDFMEQERERGITIQSAATTCF 60

Query: 79  WNDVRINIVDTPGHADFGGEVERILCMVESVVVLVDAAEGPMPQTKFVVGKALKIGLRPI 138
           W D RINI+DTPGH DF  EVER L +++  V + DA  G  PQT+ V  +A +  +  I
Sbjct: 61  WKDHRINIIDTPGHVDFTIEVERSLRVLDGAVAVFDAVAGVEPQTETVWRQADRYNVPRI 120

Query: 139 VVVNKVDRSDARADEVINEV 158
             VNK+DR+ A    V+ ++
Sbjct: 121 AFVNKMDRTGADFFRVVEQI 140