2h3e
From Proteopedia
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'''Structure of wild-type E. coli Aspartate Transcarbamoylase in the presence of N-phosphonacetyl-L-isoasparagine at 2.3A resolution''' | '''Structure of wild-type E. coli Aspartate Transcarbamoylase in the presence of N-phosphonacetyl-L-isoasparagine at 2.3A resolution''' | ||
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[[Category: Tsuruta, H.]] | [[Category: Tsuruta, H.]] | ||
[[Category: Xia, J.]] | [[Category: Xia, J.]] | ||
- | [[Category: | + | [[Category: Cooperativity]] |
- | [[Category: | + | [[Category: X-ray crystallography]] |
- | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 05:49:15 2008'' | |
- | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + |
Revision as of 02:49, 4 May 2008
Structure of wild-type E. coli Aspartate Transcarbamoylase in the presence of N-phosphonacetyl-L-isoasparagine at 2.3A resolution
Overview
The synthesis of a new inhibitor, N-phosphonacetyl-L-isoasparagine (PALI), of Escherichia coli aspartate transcarbamoylase (ATCase) is reported, as well as structural studies of the enzyme.PALI complex. PALI was synthesized in 7 steps from beta-benzyl L-aspartate. The KD of PALI was 2 microM. Kinetics and small-angle X-ray scattering experiments showed that PALI can induce the cooperative transition of ATCase from the T to the R state. The X-ray structure of the enzyme.PALI complex showed 22 hydrogen-bonding interactions between the enzyme and PALI. The kinetic characterization and crystal structure of the ATCase.PALI complex also provides detailed information regarding the importance of the alpha-carboxylate for the binding of the substrate aspartate.
About this Structure
2H3E is a Protein complex structure of sequences from Escherichia coli. Full crystallographic information is available from OCA.
Reference
N-phosphonacetyl-L-isoasparagine a potent and specific inhibitor of Escherichia coli aspartate transcarbamoylase., Eldo J, Cardia JP, O'Day EM, Xia J, Tsuruta H, Kantrowitz ER, J Med Chem. 2006 Oct 5;49(20):5932-8. PMID:17004708 Page seeded by OCA on Sun May 4 05:49:15 2008