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1c7o

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{{STRUCTURE_1c7o| PDB=1c7o | SCENE= }}
{{STRUCTURE_1c7o| PDB=1c7o | SCENE= }}
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'''CRYSTAL STRUCTURE OF CYSTALYSIN FROM TREPONEMA DENTICOLA CONTAINS A PYRIDOXAL 5'-PHOSPHATE-L-AMINOETHOXYVINYLGLYCINE COMPLEX'''
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===CRYSTAL STRUCTURE OF CYSTALYSIN FROM TREPONEMA DENTICOLA CONTAINS A PYRIDOXAL 5'-PHOSPHATE-L-AMINOETHOXYVINYLGLYCINE COMPLEX===
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==Overview==
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Cystalysin is a C(beta)-S(gamma) lyase from the oral pathogen Treponema denticola catabolyzing L-cysteine to produce pyruvate, ammonia and H(2)S. With its ability to induce cell lysis, cystalysin represents a new class of pyridoxal 5'-phosphate (PLP)-dependent virulence factors. The crystal structure of cystalysin was solved at 1.9 A resolution and revealed a folding and quaternary arrangement similar to aminotransferases. Based on the active site architecture, a detailed catalytic mechanism is proposed for the catabolism of S-containing amino acid substrates yielding H(2)S and cysteine persulfide. Since no homologies were observed with known haemolysins the cytotoxicity of cystalysin is attributed to this chemical reaction. Analysis of the cystalysin-L-aminoethoxyvinylglycine (AVG) complex revealed a 'dead end' ketimine PLP derivative, resulting in a total loss of enzyme activity. Cystalysin represents an essential factor of adult periodontitis, therefore the structure of the cystalysin-AVG complex may provide the chemical basis for rational drug design.
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{{ABSTRACT_PUBMED_10880431}}
==About this Structure==
==About this Structure==
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[[Category: Aminotransferase]]
[[Category: Aminotransferase]]
[[Category: Transferase]]
[[Category: Transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 12:25:38 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 20:19:37 2008''

Revision as of 17:19, 30 June 2008

Image:1c7o.png

Template:STRUCTURE 1c7o

CRYSTAL STRUCTURE OF CYSTALYSIN FROM TREPONEMA DENTICOLA CONTAINS A PYRIDOXAL 5'-PHOSPHATE-L-AMINOETHOXYVINYLGLYCINE COMPLEX

Template:ABSTRACT PUBMED 10880431

About this Structure

1C7O is a Single protein structure of sequence from Treponema denticola. Full crystallographic information is available from OCA.

Reference

Crystal structure of cystalysin from Treponema denticola: a pyridoxal 5'-phosphate-dependent protein acting as a haemolytic enzyme., Krupka HI, Huber R, Holt SC, Clausen T, EMBO J. 2000 Jul 3;19(13):3168-78. PMID:10880431

Page seeded by OCA on Mon Jun 30 20:19:37 2008

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