1n05

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{{STRUCTURE_1n05| PDB=1n05 | SCENE= }}
{{STRUCTURE_1n05| PDB=1n05 | SCENE= }}
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'''Crystal Structure of Schizosaccharomyces pombe Riboflavin Kinase Reveals a Novel ATP and Riboflavin Binding Fold'''
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===Crystal Structure of Schizosaccharomyces pombe Riboflavin Kinase Reveals a Novel ATP and Riboflavin Binding Fold===
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==Overview==
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The essential redox cofactors riboflavin monophosphate (FMN) and flavin adenine dinucleotide (FAD) are synthesised from their precursor, riboflavin, in sequential reactions by the metal-dependent riboflavin kinase and FAD synthetase. Here, we describe the 1.6A crystal structure of the Schizosaccharomyces pombe riboflavin kinase. The enzyme represents a novel family of phosphoryl transferring enzymes. It is a monomer comprising a central beta-barrel clasped on one side by two C-terminal helices that display an L-like shape. The opposite side of the beta-barrel serves as a platform for substrate binding as demonstrated by complexes with ADP and FMN. Formation of the ATP-binding site requires significant rearrangements in a short alpha-helix as compared to the substrate free form. The diphosphate moiety of ADP is covered by the glycine-rich flap I formed from parts of this alpha-helix. In contrast, no significant changes are observed upon binding of riboflavin. The ribityl side-chain might be covered by a rather flexible flap II. The unusual metal-binding site involves, in addition to the ADP phosphates, only the strictly conserved Thr45. This may explain the preference for zinc observed in vitro.
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{{ABSTRACT_PUBMED_12595258}}
==About this Structure==
==About this Structure==
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[[Category: Metal binding]]
[[Category: Metal binding]]
[[Category: Phosphoryl transferase]]
[[Category: Phosphoryl transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 20:39:08 2008''

Revision as of 17:39, 28 July 2008

Image:1n05.png

Template:STRUCTURE 1n05

Crystal Structure of Schizosaccharomyces pombe Riboflavin Kinase Reveals a Novel ATP and Riboflavin Binding Fold

Template:ABSTRACT PUBMED 12595258

About this Structure

1N05 is a Single protein structure of sequence from Schizosaccharomyces pombe. Full crystallographic information is available from OCA.

Reference

Crystal structure of Schizosaccharomyces pombe riboflavin kinase reveals a novel ATP and riboflavin-binding fold., Bauer S, Kemter K, Bacher A, Huber R, Fischer M, Steinbacher S, J Mol Biol. 2003 Mar 7;326(5):1463-73. PMID:12595258

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