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3bl6

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{{STRUCTURE_3bl6| PDB=3bl6 | SCENE= }}
{{STRUCTURE_3bl6| PDB=3bl6 | SCENE= }}
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'''Crystal structure of Staphylococcus aureus 5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase in complex with formycin A'''
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===Crystal structure of Staphylococcus aureus 5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase in complex with formycin A===
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==Overview==
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5'-Methylthioadenosine/S-adenosylhomocysteine nucleosidase (MTAN) catalyzes the irreversible cleavage of the glycosidic bond in 5'-methylthioadenosine (MTA) and S-adenosylhomocysteine (SAH) and plays a key role in four metabolic processes: biological methylation, polyamine biosynthesis, methionine recycling and bacterial quorum sensing. The absence of the nucleosidase in mammalian species has implicated this enzyme as a target for antimicrobial drug design. MTAN from the pathogenic bacterium Staphylococcus aureus (SaMTAN) has been kinetically characterized and its structure has been determined in complex with the transition-state analogue formycin A (FMA) at 1.7 A resolution. A comparison of the SaMTAN-FMA complex with available Escherichia coli MTAN structures shows strong conservation of the overall structure and in particular of the active site. The presence of an extra water molecule, which forms a hydrogen bond to the O4' atom of formycin A in the active site of SaMTAN, produces electron withdrawal from the ribosyl group and may explain the lower catalytic efficiency that SaMTAN exhibits when metabolizing MTA and SAH relative to the E. coli enzyme. The implications of this structure for broad-based antibiotic design are discussed.
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(as it appears on PubMed at http://www.pubmed.gov), where 18453700 is the PubMed ID number.
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{{ABSTRACT_PUBMED_18453700}}
==About this Structure==
==About this Structure==
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[[Category: Mtan]]
[[Category: Mtan]]
[[Category: Nucleosidase]]
[[Category: Nucleosidase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 23:33:40 2008''

Revision as of 20:33, 27 July 2008

Image:3bl6.png

Template:STRUCTURE 3bl6

Crystal structure of Staphylococcus aureus 5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase in complex with formycin A

Template:ABSTRACT PUBMED 18453700

About this Structure

3BL6 is a Single protein structure of sequence from Staphylococcus aureus. Full crystallographic information is available from OCA.

Reference

Structure of Staphylococcus aureus 5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase., Siu KK, Lee JE, Smith GD, Horvatin-Mrakovcic C, Howell PL, Acta Crystallogr Sect F Struct Biol Cryst Commun. 2008 May 1;64(Pt, 5):343-50. Epub 2008 Apr 30. PMID:18453700

Page seeded by OCA on Sun Jul 27 23:33:40 2008

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