>gnl|CDD|48466 cd00782, MutL_Trans, MutL_Trans: transducer domain, having a ribosomal S5 domain 2-like fold, conserved in the C-terminal domain of DNA mismatch repair (MutL/MLH1/PMS2) family. This transducer domain is homologous to the second domain of the DNA gyrase B subunit, which is known to be important in nucleotide hydrolysis and the transduction of structural signals from ATP-binding site to the DNA breakage/reunion regions of the enzymes. Included in this group are proteins similar to human MLH1, hPMS2, hPMS1, hMLH3 and E. coli MutL, MLH1 forms heterodimers with PMS2, PMS1 and MLH3. These three complexes have distinct functions in meiosis. hMLH1-hPMS2 also participates in the repair of all DNA mismatch repair (MMR) substrates. Roles for hMLH1-hPMS1 or hMLH1-hMLH3 in MMR have not been established. Cells lacking either hMLH1 or hPMS2 have a strong mutator phenotype and display microsatellite instability (MSI). Mutation in hMLH1 causes predisposition to HNPCC, Muir-Torre syndrome and Turcot syndrome (HNPCC variant). Mutation in hPMS2 causes predisposition to HPNCC and Turcot syndrome. Mutation in hMLH1 accounts for a large fraction of HNPCC families. There is no convincing evidence to support hPMS1 having a role in HNPCC predisposition. It has been suggested that hMLH3 may be a low risk gene for colorectal cancer; however there is little evidence to support it having a role in classical HNPCC. It has been suggested that during initiation of DNA mismatch repair in E. coli, the mismatch recognition protein MutS recruits MutL in the presence of ATP. The MutS(ATP)-MutL ternary complex formed, then recruits the latent endonuclease MutH.. Length = 122

 Score =  126 bits (317), Expect = 2e-29
 Identities = 46/120 (38%), Positives = 73/120 (60%)

Query: 207 ERISQVIGEDFINNAVELNEKSNEITLQGYTGIPTFNRGNANQFYVFINGRTVQDKFILS 266
           +RI+QV G++   N +E+  +S +  + GY   P F R + ++ ++F+NGR V+DK +  
Sbjct: 3   DRIAQVYGKEVAKNLIEVELESGDFRISGYISKPDFGRSSKDRQFLFVNGRPVRDKLLSK 62

Query: 267 TIRTAYAETIPLGRYPVVVLLLEIDPRQVDVNVHPAKSYIRFRNPTIIRNFIIQSIQKAI 326
            I  AY   +P GRYPV VL LE+ P  VDVNVHP K  +RF +   +   I ++++ A+
Sbjct: 63  AINEAYRSYLPKGRYPVFVLNLELPPELVDVNVHPTKREVRFSDEEEVLELIREALRSAL 122