>cd06289 PBP1_MalI_like Ligand-binding domain of MalI, a transcription regulator of the maltose system of Escherichia coli and its close homologs from other bacteria. This group includes the ligand-binding domain of MalI, a transcription regulator of the maltose system of Escherichia coli and its close homologs from other bacteria. They are members of the LacI-GalR family of repressor proteins which are composed of two functional domains: an N-terminal HTH (helix-turn-helix) domain, which is responsible for the DNA-binding specificity, and a C-terminal ligand-binding domain, which is homologous to the sugar-binding domain of ABC-type transport systems that contain the type I periplasmic binding protein-like fold. As also observed in the periplasmic binding proteins, the C-terminal domain of the bacterial transcription repressor undergoes a conformational change upon ligand binding which in turn changes the DNA binding affinity of the repressor.

Probab=93.39 E-value=0.75 Score=26.33 Aligned_cols=125 Identities=16% Similarity=0.106 Sum_probs=52.1 Q ss_pred CEEEEEEECHHHHHHHHHHHHHHHHHHHCCCCEEEEE-HHHHHHHHHHHHHHHHHHHCCCCCCEEEEEEEEECCCCCHHH Q ss_conf 7179998031289999999999999998799555553-001442269999998633113785356654120006652467 Q gi|254780346|r 6 PHVLIIEARFYENLSAMLFEGCVNVLHSRAVQWSSIV-TPGVLEIPAAVSMVMNAKTRSVTYDGIIVLGVVMRGKTAHCD 84 (149) Q Consensus 6 ~kI~IV~s~~~~~i~~~ll~ga~~~l~~~~~~~~~i~-VPGa~EiP~a~~~~~~~~~~~~~~D~vIaLG~VIkGeT~H~e 84 (149) T Consensus 118 ~~i~~i~~~~~~~~~~~R~~Gf~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~l~~~~~~~aii~~----------~D 187 (268) T cd06289 118 RRIAFIGGLEDSSTRRERLAGYRAALAEAGLPFDSELVVEGPPSRQGGAEAVAQLLDLPPRPTAIVCF----------ND 187 (268) T ss_pred CEEEEECCCCCCCHHHHHHHHHHHHHHHCCCCCCCCEEECCCCCHHHHHHHHHHHHHCCCCCCEECCC----------CH T ss_conf 70999528988706999999999999976998664345316886556999999998469998620357----------68 Q ss_pred HHHHHHHHHHHHHHHHCCCCCEEEEECCCCHHHHHHHH------CCCCCCCHHHHHHHHHHHHH Q ss_conf 89999999999999743997056542558899999950------65657456999999999999 Q gi|254780346|r 85 VIAHAVTRGLVDLSINGSLPIGNGIVVVDSEQQAFDRV------SPSHLDRGGCAARSALAMIE 142 (149) Q Consensus 85 ~I~~~v~~gl~~lsl~~~~PI~~gILt~~n~~QA~~R~------~~~~~nkG~eaa~Aal~mi~ 142 (149) T Consensus 188 ~~A~g~l~~l~~~gi--~vp~disiigfd~~~~~~~~~p~ltti~~~~~~~g~~a~~~l~~~i~ 249 (268) T cd06289 188 LVAFGAMSGLRRAGL--TPGRDIAVVGFDDVAEAALATPALTTVSTDPREIGRRAAELLLRRIA 249 (268) T ss_pred HHHHHHHHHHHHCCC--CCCCCEEEEEECCHHHHHHCCCCEEEEEECHHHHHHHHHHHHHHHHC T ss_conf 999999999998499--99985499995787899722897169984999999999999999976

HHsearch alignment for GI: 254780346 and conserved domain: cd06289