>cd03289 ABCC_CFTR2 The CFTR subfamily domain 2. The cystic fibrosis transmembrane regulator (CFTR), the product of the gene mutated in patients with cystic fibrosis, has adapted the ABC transporter structural motif to form a tightly regulated anion channel at the apical surface of many epithelia. Use of the term assembly of a functional ion channel implies the coming together of subunits or at least smaller not-yet functional components of the active whole. In fact, on the basis of current knowledge only the CFTR polypeptide itself is required to form an ATP- and protein kinase A-dependent low-conductance chloride channel of the type present in the apical membrane of many epithelial cells. CFTR displays the typical organization (IM-ABC)2 and carries a characteristic hydrophilic R-domain that separates IM1-ABC1 from IM2-ABC2.

Probab=97.03 E-value=0.00089 Score=45.39 Aligned_cols=48 Identities=25% Similarity=0.364 Sum_probs=33.3 Q ss_pred EEEEECCCCCCHHHHHHHHHHHHHHCCC-----------------CCEEEEEECCCCCCHHHHHH Q ss_conf 9995278666733799999999973389-----------------86899950887588268876 Q gi|254780827|r 85 VVGITGSVAVGKSTFARILCILLQQISN-----------------FKVSLITTDGFLFPNAVLTA 132 (311) Q Consensus 85 IIGIAG~~asGKST~Ar~L~~lL~~~~~-----------------~~V~lis~DgF~~~n~~l~~ 132 (311) T Consensus 32 ~vaIvG~sGsGKSTLl~lL~gl~~~~G~I~idg~~i~~~~~~~~r~~i~~vpQ~~~lf~~Ti~eN 96 (275) T cd03289 32 RVGLLGRTGSGKSTLLSAFLRLLNTEGDIQIDGVSWNSVPLQKWRKAFGVIPQKVFIFSGTFRKN 96 (275) T ss_pred EEEEECCCCCCHHHHHHHHHHHCCCCCEEEECCEECCCCCHHHHHHHEEEECCCCCCCCCCHHHH T ss_conf 99999999997999999996035789539999880673689999763899665563267419997

HHsearch alignment for GI: 254780827 and conserved domain: cd03289