1eb3

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{{STRUCTURE_1eb3| PDB=1eb3 | SCENE= }}
{{STRUCTURE_1eb3| PDB=1eb3 | SCENE= }}
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'''YEAST 5-AMINOLAEVULINIC ACID DEHYDRATASE 4,7-DIOXOSEBACIC ACID COMPLEX'''
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===YEAST 5-AMINOLAEVULINIC ACID DEHYDRATASE 4,7-DIOXOSEBACIC ACID COMPLEX===
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==Overview==
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The structures of 5-aminolaevulinic acid dehydratase complexed with two irreversible inhibitors (4-oxosebacic acid and 4,7-dioxosebacic acid) have been solved at high resolution. Both inhibitors bind by forming a Schiff base link with Lys 263 at the active site. Previous inhibitor binding studies have defined the interactions made by only one of the two substrate moieties (P-side substrate) which bind to the enzyme during catalysis. The structures reported here provide an improved definition of the interactions made by both of the substrate molecules (A- and P-side substrates). The most intriguing result is the novel finding that 4,7-dioxosebacic acid forms a second Schiff base with the enzyme involving Lys 210. It has been known for many years that P-side substrate forms a Schiff base (with Lys 263) but until now there has been no evidence that binding of A-side substrate involves formation of a Schiff base with the enzyme. A catalytic mechanism involving substrate linked to the enzyme through Schiff bases at both the A- and P-sites is proposed.
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(as it appears on PubMed at http://www.pubmed.gov), where 11513881 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11513881}}
==About this Structure==
==About this Structure==
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[[Category: Tetrapyrrole synthesis]]
[[Category: Tetrapyrrole synthesis]]
[[Category: Tim barrel]]
[[Category: Tim barrel]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 00:26:16 2008''

Revision as of 21:26, 30 June 2008

Image:1eb3.png

Template:STRUCTURE 1eb3

YEAST 5-AMINOLAEVULINIC ACID DEHYDRATASE 4,7-DIOXOSEBACIC ACID COMPLEX

Template:ABSTRACT PUBMED 11513881

About this Structure

1EB3 is a Single protein structure of sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA.

Reference

The X-ray structure of yeast 5-aminolaevulinic acid dehydratase complexed with two diacid inhibitors., Erskine PT, Coates L, Newbold R, Brindley AA, Stauffer F, Wood SP, Warren MJ, Cooper JB, Shoolingin-Jordan PM, Neier R, FEBS Lett. 2001 Aug 17;503(2-3):196-200. PMID:11513881

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