| Type: | Conserved_site | Name: | Proteinase inhibitor I2, Kunitz, conserved site |
| Description: | The majority of the sequences having this domain belong to the MEROPS inhibitor family I2, clan IB; the Kunitz/bovine pancreatic trypsin inhibitor family, they inhibit proteases of the S1 family [] and are restricted to the metazoa with a single exception: Amsacta moorei entomopoxvirus. They are short (~50 residue) alpha/beta proteins with few secondary structures. The fold is constrainedby 3 disulphide bonds. The type example for this family is aprotinin (bovine pancreatic trypsin inhibitor) [] (or basic protease inhibitor), but the family includes numerous other members [, , , ], such as snake venom basic protease; mammalian inter-alpha-trypsininhibitors; trypstatin, a rodent mast cell inhibitor of trypsin; a domain found in an alternatively-spliced form of Alzheimer's amyloid beta-protein;domains at the C-termini of the alpha(1) and alpha(3) chains of type VII and type VI collagens; and tissue factor pathway inhibitor precursor.This entry represents a conserved site spanning a region starting after the third cysteine and ending with the fifth one. | Short Name: | Prtase_inh_Kunz-CS |
