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2jxr

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{{STRUCTURE_2jxr| PDB=2jxr | SCENE= }}
{{STRUCTURE_2jxr| PDB=2jxr | SCENE= }}
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'''STRUCTURE OF YEAST PROTEINASE A'''
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===STRUCTURE OF YEAST PROTEINASE A===
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==Overview==
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The crystal structures of glycosylated native proteinase A, an aspartic proteinase found in the vacuole of Saccharomyces cerevisiae, and its complex with a difluorostatone-containing tripeptide have been determined by molecular replacement to 3.5 A and 2.4 A resolutions, respectively. Superposition of the bound and native forms gave an r.m.s. difference of 0.6 A largely reflecting the poor resolution of the native crystal structure. The secondary and tertiary structures are highly similar to those found in porcine pepsin and lysosomal cathepsin D; superposition of the structure of proteinase A bound to the difluorostatone inhibitor on those of pepsin and cathepsin D gave pairwise r.m.s. differences for C(alpha) atoms of 1.36 A and 0.88 A. Most differences occur in loop regions. Comparison of the structure of the proteinase A-difluorostatone complex with that of endothiapepsin bound with the same inhibitor shows that the conformation and hydrogen bond interactions of the inhibitor in the active site are very similar, even though the enzymes have only 27% sequence identity. Electron density for the crystal structure of the proteinase A complex reveals five residues of the oligosaccharide structure attached to Asn67: Man-(1 --&gt; 2)-alpha-Man-(1 --&gt; 3)-beta-Man-(1 --&gt; 4)-beta-GlcNAc-(1 --&gt; 4)-beta-GlcNAc-Asn-67. The first three residues of the oligosaccharide cover the same region of the protein surface as those of the oligosaccharide attached to the equivalent position in cathepsin D. The second carbohydrate attachment site is disordered beyond the first carbohydrate residue in both enzymes.
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(as it appears on PubMed at http://www.pubmed.gov), where 9135120 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9135120}}
==About this Structure==
==About this Structure==
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[[Category: Signal]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 09:23:04 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 16:27:54 2008''

Revision as of 13:27, 27 July 2008

Image:2jxr.png

Template:STRUCTURE 2jxr

STRUCTURE OF YEAST PROTEINASE A

Template:ABSTRACT PUBMED 9135120

About this Structure

2JXR is a Single protein structure of sequence from Saccharomyces cerevisiae. This structure supersedes the now removed PDB entry 1jxr. Full crystallographic information is available from OCA.

Reference

The three-dimensional structure at 2.4 A resolution of glycosylated proteinase A from the lysosome-like vacuole of Saccharomyces cerevisiae., Aguilar CF, Cronin NB, Badasso M, Dreyer T, Newman MP, Cooper JB, Hoover DJ, Wood SP, Johnson MS, Blundell TL, J Mol Biol. 1997 Apr 11;267(4):899-915. PMID:9135120

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