Kazal-type serine protease inhibitor domain; Usually indicative of serine protease inhibitors. However, kazal-like domains are also seen in the extracellular part of agrins, which are not known to be protease inhibitors. Kazal domains often occur in tandem arrays. Small alpha+beta fold containing three disulphides. Alignment also includes a single domain from transporters in the OATP/PGT family.

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                 ....*....|....*....|....*....|....*....|...
gi 6981578    37 MGCPRIYDPVCGTNGITYPSECSLCFENRKFGTSIHIQRRGTC 79
Cdd:pfam00050  7 GACPRIYDPVCGTDGKTYSNECLFCAENGKRGTNLHKVHDGEC 49

Kazal-type serine protease inhibitor domain; Usually indicative of serine protease inhibitors. However, kazal-like domains are also seen in the extracellular part of agrins, which are not known to be protease inhibitors. Kazal domains often occur in tandem arrays. Small alpha+beta fold containing three disulphides. Alignment also includes a single domain from transporters in the OATP/PGT family.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|...
gi 6981578    37 MGCPRIYDPVCGTNGITYPSECSLCFENRKFGTSIHIQRRGTC 79
Cdd:pfam00050  7 GACPRIYDPVCGTDGKTYSNECLFCAENGKRGTNLHKVHDGEC 49

Kazal type serine protease inhibitors and follistatin-like domains. Kazal inhibitors inhibit serine proteases, such as, trypsin, chyomotrypsin, avian ovomucoids, and elastases. The inhibitory domain has one reactive site peptide bond, which serves the cognate enzyme as substrate. The reactive site peptide bond is a combining loop which has an identical conformation in all Kazal inhibitors and in all enzyme/inhibitor complexes. These Kazal domains (small hydrophobic core of alpha/beta structure with 3 to 4 disulfide bonds) often occur in tandem arrays. Similar domains are also present in follistatin (FS) and follistatin-like family members, which play an important role in tissue specific regulation. The FS domain consists of an N-terminal beta hairpin (FOLN/EGF-like domain) and a Kazal-like domain and has five disulfide bonds. Although the Kazal-like FS substructure is similar to Kazal proteinase inhibitors, no FS domain has yet been shown to be a proteinase inhibitor. Follistatin-like family members include SPARC, also known as, BM-40 or osteonectin, the Gallus gallus Flik protein, as well as, agrin which has a long array of FS domains. The kazal-type inhibitor domain has also been detected in an extracellular loop region of solute carrier 21 (SLC21) family members (organic anion transporters) , which may regulate the specificity of anion uptake. The distant homolog, Ascidian trypsin inhibitor, is included in this CD.

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               ....*....|....*....|....*....|....*....|.
gi 6981578  39 CPRIYDPVCGTNGITYPSECSLCFENRKFGTSIHIQRRGTC 79
Cdd:cd00104  1 CPKEYDPVCGSDGKTYSNECHLGCAACRSGRSITVAHNGPC 41

Solute carrier organic anion transporter 1A subfamily of the Major Facilitator Superfamily of transporters; The Solute carrier organic anion transporter 1A (SLCO1A), also called Organic anion-transporting polypeptide 1A (OATP1A), subfamily is composed of one human member OATP1A2 (encoded by SLCO1A2) and several rodent proteins encoded by the Slco1a1, Slco1a3, Slco1a4, Slco1a5, and Slco1a6 genes. OATP1A2, also known as human OATP-A or OATP1, shows a broad spectrum of substrates including endogenous compounds (such as bile acids, steroid hormones and their conjugates, thyroid hormones) and various drugs (such as fexofenadine, ouabain and the cyanobacterial toxin microcystin). It is expressed in the brain, kidney, intestine, liver, lung, testes, and the eye (ciliary body). The SLCO1A/OATP1A subfamily belongs to the Solute carrier organic anion transporter [SLCO, also called organic anion transporting polypeptides (OATPs) or Solute carrier family 21] family of the Major Facilitator Superfamily (MFS) of transporters. MFS proteins are thought to function through a single substrate binding site, alternating-access mechanism involving a rocker-switch type of movement.

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gi 6981578   39 CP-RIYDPVCGTNGITYPSEC 58
Cdd:cd17458 431 CPlKVWDPVCGNNGLTYVSAC 451