>gnl|CDD|73050 cd03291, ABCC_CFTR1, The CFTR subfamily domain 1. 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.. Length = 282

Score = 110 bits (275), Expect = 2e-24 Identities = 65/210 (30%), Positives = 111/210 (52%), Gaps = 17/210 (8%) Query: 357 DVFFSY--KQGHPVLSGINLCFKSGKMTALVGPSGSGKSTIINLLMRMYDPSSGSIEIDG 414 ++FFS G PVL INL + G+M A+ G +GSGK++++ L++ +PS G I+ G Sbjct: 39 NLFFSNLCLVGAPVLKNINLKIEKGEMLAITGSTGSGKTSLLMLILGELEPSEGKIKHSG 98 Query: 415 INIRDITFSSLRERISYVGQDVFLFSNTVRYNILIGRPMATEEEMIEIAKSANAHDFIMS 474 RIS+ Q ++ T++ NI+ G E + K+ + I Sbjct: 99 -------------RISFSSQFSWIMPGTIKENIIFGVSY-DEYRYKSVVKACQLEEDITK 144 Query: 475 LPQGYDTYVGENGSNLSGGQKQRIAIARAMLRDGHILVLDEATSALDTHTEN-LVRQALS 533 P+ +T +GE G LSGGQ+ RI++ARA+ +D + +LD LD TE + + Sbjct: 145 FPEKDNTVLGEGGITLSGGQRARISLARAVYKDADLYLLDSPFGYLDVFTEKEIFESCVC 204 Query: 534 RLMQGRTTIVIAHRISTIIEADHIIFIEDG 563 +LM +T I++ ++ + +AD I+ + +G Sbjct: 205 KLMANKTRILVTSKMEHLKKADKILILHEG 234

RPSBLAST alignment for GI: 254780917 and conserved domain: cd03291