>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=90.26  E-value=0.52  Score=26.00  Aligned_cols=41  Identities=24%  Similarity=0.216  Sum_probs=23.4

Q ss_pred             CCCCEEEEEECCCCCCCCHHHHHHHHHHHHCCCCCCEEEEEC
Q ss_conf             464318999613110010012357888752143342256311
Q gi|254780601|r  146 ISHLKAVVLDEADEMLDLGFRDDIEFILDSSPKKRRMLMFSA  187 (573)
Q Consensus       146 l~~v~~lVlDEaD~ml~~gf~~~i~~i~~~~p~~~q~~l~SA  187 (573)
T Consensus       154 l~~p~IllLDEpTs~LD~~te~~i~~~l~~~~~~~-TvI~it  194 (275)
T cd03289         154 LSKAKILLLDEPSAHLDPITYQVIRKTLKQAFADC-TVILSE  194 (275)
T ss_pred             HCCCCEEEEECCCCCCCHHHHHHHHHHHHHHCCCC-EEEEEE
T ss_conf             51999899979766899999999999999972999-899994