1r64

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{{STRUCTURE_1r64| PDB=1r64 | SCENE= }}
{{STRUCTURE_1r64| PDB=1r64 | SCENE= }}
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'''The 2.2 A crystal structure of Kex2 protease in complex with Ac-Arg-Glu-Lys-boroArg peptidyl boronic acid inhibitor'''
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===The 2.2 A crystal structure of Kex2 protease in complex with Ac-Arg-Glu-Lys-boroArg peptidyl boronic acid inhibitor===
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==Overview==
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Kex2 is the yeast prototype of a large family of serine proteases that are highly specific for cleavage of their peptide substrates C-terminal to paired basic sites. This paper reports the 2.2 A resolution crystal structure of ssKex2 in complex with an Ac-Arg-Glu-Lys-Arg peptidyl boronic acid inhibitor (R = 19.7, R(free) = 23.4). By comparison of this structure with the structure of the mammalian homologue furin [Henrich, S., et al. (2003) Nat. Struct. Biol. 10, 520-526], we suggest a structural basis for the differences in substrate recognition at the P(2) and P(4) positions between Kex2 and furin and provide a structural rationale for the lack of P(6) recognition in Kex2. In addition, several monovalent cation binding sites are identified, and a mechanism of activation of Kex2 by potassium ion is proposed.
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{{ABSTRACT_PUBMED_14992578}}
==About this Structure==
==About this Structure==
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[[Category: Protein convertase]]
[[Category: Protein convertase]]
[[Category: Subtilisin]]
[[Category: Subtilisin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 07:07:45 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 10:56:51 2008''

Revision as of 07:56, 29 July 2008

Image:1r64.png

Template:STRUCTURE 1r64

The 2.2 A crystal structure of Kex2 protease in complex with Ac-Arg-Glu-Lys-boroArg peptidyl boronic acid inhibitor

Template:ABSTRACT PUBMED 14992578

About this Structure

1R64 is a Single protein structure of sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA.

Reference

Structural basis for differences in substrate selectivity in Kex2 and furin protein convertases., Holyoak T, Kettner CA, Petsko GA, Fuller RS, Ringe D, Biochemistry. 2004 Mar 9;43(9):2412-21. PMID:14992578

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