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'''CRYSTAL STRUCTURE OF THE FIRST ACTIVE AUTOLYSATE FORM OF THE PORCINE ALPHA TRYPSIN''' | '''CRYSTAL STRUCTURE OF THE FIRST ACTIVE AUTOLYSATE FORM OF THE PORCINE ALPHA TRYPSIN''' | ||
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[[Category: Pattabhi, V.]] | [[Category: Pattabhi, V.]] | ||
[[Category: Sundaram, P V.]] | [[Category: Sundaram, P V.]] | ||
[[Category: | [[Category: Hydrolase]] | ||
[[Category: | [[Category: Serine protease]] | ||
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Revision as of 10:23, 2 May 2008
CRYSTAL STRUCTURE OF THE FIRST ACTIVE AUTOLYSATE FORM OF THE PORCINE ALPHA TRYPSIN
OverviewOverview
The first crystal structure of an active autolysate form of porcine alpha-trypsin (APT), a two-chain molecule obtained from the limited autolysis of porcine beta-trypsin at position Lys145-Ser146, has been determined. APT crystallizes in space group P2(1)2(1)2(1) with one protein molecule in the asymmetric unit. The structure was solved by molecular replacement followed by refinement using X-PLOR to an R factor of 0.200 and an R(free) of 0.285 for 8.0-1.8 A data with r.m.s deviations from ideal values of 0.01 A and 1.7 degrees for bond lengths and bond angles, respectively. Comparison with inactive autolysate porcine epsilon-trypsin (EPT) and porcine beta-trypsin in complex with bittergourd trypsin inhibitor (MCT) revealed a small but systematic directional chain shift around the active-site residues from APT to EPT to MCT.
About this StructureAbout this Structure
1AKS is a Protein complex structure of sequences from Sus scrofa. Full crystallographic information is available from OCA.
ReferenceReference
The first structure at 1.8 A resolution of an active autolysate form of porcine alpha-trysoin., Johnson A, Krishnaswamy S, Sundaram PV, Pattabhi V, Acta Crystallogr D Biol Crystallogr. 1997 May 1;53(Pt 3):311-5. PMID:15299934 Page seeded by OCA on Fri May 2 10:23:56 2008