>gnl|CDD|150993 pfam10412, TrwB_AAD_bind, Type IV secretion-system coupling protein DNA-binding domain. The plasmid conjugative coupling protein TrwB forms hexamers from six structurally very similar protomers. This hexamer contains a central channel running from the cytosolic pole (made up by the AADs) to the membrane pole ending at the transmembrane pore shaped by 12 transmembrane helices, rendering an overall mushroom-like structure. The TrwB_AAD (all-alpha domain) domain appears to be the DNA-binding domain of the structure. TrwB, a basic integral inner-membrane nucleoside-triphosphate-binding protein, is the structural prototype for the type IV secretion system coupling proteins, a family of proteins essential for macromolecular transport between cells and export. Length = 386

 Score = 43.7 bits (104), Expect = 2e-04
 Identities = 20/55 (36%), Positives = 30/55 (54%), Gaps = 5/55 (9%)

Query: 399 TISGESVIADLANMPHILVAGTTGSGKSVAINTMIMSLLYRLRPDECRMIMVDPK 453
           TI+G  +        HIL+ GTTG+GK+ A+  ++  +  R R D  R I+ DP 
Sbjct: 3   TIAGVPLPRRSETQ-HILIVGTTGTGKTQALRELLDQI--RARGD--RAIIYDPT 52