1o7j
From Proteopedia
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==Overview== | ==Overview== | ||
| - | An X-ray structure of L-asparaginase from Erwinia chrysanthemi (ErA) has | + | An X-ray structure of L-asparaginase from Erwinia chrysanthemi (ErA) has been refined at 1 A resolution to an R factor of below 0.1, using data collected on a synchrotron source. With four molecules of the enzyme consisting of 327 amino acids each, this crystal contains one of the largest asymmetric units of a protein refined to date at atomic resolution. Previously, structures of ErA and of related enzymes from other bacterial sources have been refined at resolutions not exceeding 1.7 A; thus, the present structure represents a very significant improvement in the quality of the available models of these proteins and should provide a good basis for future studies of the conformational variability of proteins, identification of subtle conformational features and corroboration of the stereochemical libraries, amongst other things. L-Asparaginases, which are enzymes that catalyze the hydrolysis of L-asparagine to aspartic acid, have been used for over 30 y as therapeutic agents in the treatment of acute childhood lymphoblastic leukemia, although the details of the enzymatic reaction and substrate specificity have not yet been completely elucidated. This atomic resolution structure is a step in that direction. |
==About this Structure== | ==About this Structure== | ||
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[[Category: l-asparaginase]] | [[Category: l-asparaginase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:14:20 2008'' |
Revision as of 12:14, 21 February 2008
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ATOMIC RESOLUTION STRUCTURE OF ERWINIA CHRYSANTHEMI L-ASPARAGINASE
Overview
An X-ray structure of L-asparaginase from Erwinia chrysanthemi (ErA) has been refined at 1 A resolution to an R factor of below 0.1, using data collected on a synchrotron source. With four molecules of the enzyme consisting of 327 amino acids each, this crystal contains one of the largest asymmetric units of a protein refined to date at atomic resolution. Previously, structures of ErA and of related enzymes from other bacterial sources have been refined at resolutions not exceeding 1.7 A; thus, the present structure represents a very significant improvement in the quality of the available models of these proteins and should provide a good basis for future studies of the conformational variability of proteins, identification of subtle conformational features and corroboration of the stereochemical libraries, amongst other things. L-Asparaginases, which are enzymes that catalyze the hydrolysis of L-asparagine to aspartic acid, have been used for over 30 y as therapeutic agents in the treatment of acute childhood lymphoblastic leukemia, although the details of the enzymatic reaction and substrate specificity have not yet been completely elucidated. This atomic resolution structure is a step in that direction.
About this Structure
1O7J is a Single protein structure of sequence from Erwinia chrysanthemi with , and as ligands. Active as Asparaginase, with EC number 3.5.1.1 Known structural/functional Site: . Full crystallographic information is available from OCA.
Reference
Atomic resolution structure of Erwinia chrysanthemi L-asparaginase., Lubkowski J, Dauter M, Aghaiypour K, Wlodawer A, Dauter Z, Acta Crystallogr D Biol Crystallogr. 2003 Jan;59(Pt 1):84-92. Epub 2002, Dec 19. PMID:12499544
Page seeded by OCA on Thu Feb 21 14:14:20 2008
Categories: Asparaginase | Erwinia chrysanthemi | Single protein | Aghaiypour, K. | Dauter, M. | Dauter, Z. | Lubkowski, J. | Wlodawer, A. | EDO | GOL | SO4 | Atomic resolution | Hydrolase | L-asparaginase
