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- W2022235648 abstract "Human tissue kallikrein, a trypsin-like serine protease involved in blood pressure regulation and inflammation processes, was expressed in a deglycosylated form at high levels in Pichia pastoris, purified, and crystallized. The crystal structure at 2.0 Å resolution is described and compared with that of porcine kallikrein and of other trypsin-like proteases. The active and S1 sites (nomenclature of Schechter I, Berger A, 1967, Biochem Biophys Res Commun 27:157-162) are similar to those of porcine kallikrein. Compared to trypsin, the S1 site is enlarged owing to the insertion of an additional residue, cis-Pro 219. The replacement Tyr 228 → Ala further enlarges the S1 pocket. However, the replacement of Gly 226 in trypsin with Ser in human tissue kallikrein restricts accessibility of substrates and inhibitors to Asp 189 at the base of the S1 pocket; there is a hydrogen bond between Oδ1Asp189 and Oγser226. These changes in the architecture of the S1 site perturb the binding of inhibitors or substrates from the modes determined or inferred for trypsin. The crystal structure gives insight into the structural differences responsible for changes in specificity in human tissue kallikrein compared with other trypsin-like proteases, and into the structural basis for the unusual specificity of human tissue kallikrein in cleaving both an Arg-Ser and a Met-Lys peptide bond in its natural protein substrate, kininogen. A Zn+2-dependent, small-molecule competitive inhibitor of kallikrein (Ki = 3.3 μM) has been identified and the bound structure modeled to guide drug design." @default.
- W2022235648 created "2016-06-24" @default.
- W2022235648 creator A5004721331 @default.
- W2022235648 creator A5015767377 @default.
- W2022235648 creator A5034270512 @default.
- W2022235648 creator A5085819729 @default.
- W2022235648 date "1998-04-01" @default.
- W2022235648 modified "2023-10-17" @default.
- W2022235648 title "Crystal structure of recombinant human tissue kallikrein at 2.0 Å resolution" @default.
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- W2022235648 doi "https://doi.org/10.1002/pro.5560070405" @default.
- W2022235648 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2143987" @default.
- W2022235648 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9568894" @default.
- W2022235648 hasPublicationYear "1998" @default.
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