12as

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==About this Structure==
==About this Structure==
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12AS is a [[http://en.wikipedia.org/wiki/Single_protein Single protein]] structure of sequence from [[http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]] with ASN and AMP as [[http://en.wikipedia.org/wiki/ligands ligands]]. Active as [[http://en.wikipedia.org/wiki/Ligase Ligase]], with EC number [[http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.3.1.1 6.3.1.1]]. Structure known Active Sites: NU1 and NU2. Full crystallographic information is available from [[http://ispc.weizmann.ac.il/oca-bin/ocashort?id=12AS OCA]].
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12AS is a [[http://en.wikipedia.org/wiki/Single_protein Single protein]] structure of sequence from [[http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]] with ASN and AMP as [[http://en.wikipedia.org/wiki/ligands ligands]]. Active as [[http://en.wikipedia.org/wiki/Aspartate--ammonia_ligase Aspartate--ammonia ligase]], with EC number [[http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.3.1.1 6.3.1.1]]. Structure known Active Sites: NU1 and NU2. Full crystallographic information is available from [[http://ispc.weizmann.ac.il/oca-bin/ocashort?id=12AS OCA]].
==Reference==
==Reference==
Crystal structure of asparagine synthetase reveals a close evolutionary relationship to class II aminoacyl-tRNA synthetase., Nakatsu T, Kato H, Oda J, Nat Struct Biol. 1998 Jan;5(1):15-9. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=9437423 9437423]
Crystal structure of asparagine synthetase reveals a close evolutionary relationship to class II aminoacyl-tRNA synthetase., Nakatsu T, Kato H, Oda J, Nat Struct Biol. 1998 Jan;5(1):15-9. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=9437423 9437423]
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[[Category: Aspartate--ammonia ligase]]
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
[[Category: Single protein]]
[[Category: Single protein]]
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[[Category: nitrogen fixation]]
[[Category: nitrogen fixation]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Oct 30 08:26:36 2007''
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Oct 30 10:20:20 2007''

Revision as of 08:15, 30 October 2007


12as, resolution 2.2Å

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ASPARAGINE SYNTHETASE MUTANT C51A, C315A COMPLEXED WITH L-ASPARAGINE AND AMP

Overview

The crystal structure of E. coli asparagine synthetase has been determined, by X-ray diffraction analysis at 2.5 A resolution. The overall structure, of the enzyme is remarkably similar to that of the catalytic domain of, yeast aspartyl-tRNA synthetase despite low sequence similarity. These, enzymes have a common reaction mechanism that implies the formation of an, aminoacyl-adenylate intermediate. The active site architecture and most of, the catalytic residues are also conserved in both enzymes. These proteins, have probably evolved from a common ancestor even though their sequence, similarities are small. The functional and structural similarities of both, enzymes suggest that new enzymatic activities would generally follow the, recruitment of a protein catalyzing a similar chemical ... [(full description)]

About this Structure

12AS is a [Single protein] structure of sequence from [Escherichia coli] with ASN and AMP as [ligands]. Active as [Aspartate--ammonia ligase], with EC number [6.3.1.1]. Structure known Active Sites: NU1 and NU2. Full crystallographic information is available from [OCA].

Reference

Crystal structure of asparagine synthetase reveals a close evolutionary relationship to class II aminoacyl-tRNA synthetase., Nakatsu T, Kato H, Oda J, Nat Struct Biol. 1998 Jan;5(1):15-9. PMID:9437423

Page seeded by OCA on Tue Oct 30 10:20:20 2007

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