Basic Pancreatic Trypsin Inhibitor


Function

Basic Pancreatic Trypsin Inhibitor (BPTI) is a small protein which inhibits trypsin and related proteases. [1] For other trypsin inhibitors see Trypsin inhibitor.

Relevance

BPTI is used as drug called Aprotinin used to reduce bleeding during surgery.

Structural highlights

extends into the active site of trypsin and inhibits its proteolytic function. [2]

3D Structures of BPTI

BPTI 3D structures


Bovine BPTI (in salmon) complex with trypsin (magenta), sulfate and Ca+2 ion (green) (PDB code 3tgi)

Drag the structure with the mouse to rotate

ReferencesReferences

  1. Parkin S, Rupp B, Hope H. Structure of bovine pancreatic trypsin inhibitor at 125 K definition of carboxyl-terminal residues Gly57 and Ala58. Acta Crystallogr D Biol Crystallogr. 1996 Jan 1;52(Pt 1):18-29. PMID:15299722 doi:http://dx.doi.org/10.1107/S0907444995008675
  2. Pasternak A, Ringe D, Hedstrom L. Comparison of anionic and cationic trypsinogens: the anionic activation domain is more flexible in solution and differs in its mode of BPTI binding in the crystal structure. Protein Sci. 1999 Jan;8(1):253-8. PMID:10210204

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