1HPT image
Entry Detail
PDB ID:
1HPT
Keywords:
SERINE PROTEASE INHIBITOR
Title:
THREE-DIMENSIONAL STRUCTURE OF A RECOMBINANT VARIANT OF HUMAN PANCREATIC SECRETORY TRYPSIN INHIBITOR (KAZAL TYPE)
Biological Source:
Source Organism:
Homo sapiens
PDB Version:
Deposition Date:
1992-03-27
Release Date:
1993-10-31
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.30 Å
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 43
1HPT validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:PANCREATIC SECRETORY TRYPSIN INHIBITOR (KAZAL TYPE) VARIANT 3
Chain IDs:A
Chain Length:56
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P00995 Pfam ID:PF00050
Primary Citation
Three-dimensional structure of a recombinant variant of human pancreatic secretory trypsin inhibitor (Kazal type).
J.Mol.Biol. 225 1095 1103 (1992)
PMID: 1613792 DOI: 10.1016/0022-2836(92)90107-U

Abstact

A modified version of the human pancreatic trypsin inhibitor (PSTI), generated in a protein-design project, has been crystallized in spacegroup P4(3) with lattice constants a = 40.15 A, c = 33.91 A. The structure has been solved by molecular replacement. Refinement of the structure by simulated annealing and conventional restrained least-squares yielded for 8.0 to 2.3 A data a final R-value of 19.1%. Differences to the known structures of porcine PSTI complexed with trypsinogen and modified human PSTI complexed with chymotrypsinogen occur at the flexible N-terminal part of the molecule. These differences are influenced by crystal packing, as are low temperature factors for the binding loop. The geometry of the binding loop is similar to the complexed structures.

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Primary Citation of related structures
1HPT