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==Crystal Structure of Schizosaccharomyces pombe Riboflavin Kinase Reveals a Novel ATP and Riboflavin Binding Fold==
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<StructureSection load='1n06' size='340' side='right'caption='[[1n06]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1n06]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Schizosaccharomyces_pombe Schizosaccharomyces pombe]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1N06 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1N06 FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene></td></tr>
{{STRUCTURE_1n06|  PDB=1n06  |  SCENE= }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1n06 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1n06 OCA], [https://pdbe.org/1n06 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1n06 RCSB], [https://www.ebi.ac.uk/pdbsum/1n06 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1n06 ProSAT]</span></td></tr>
 
</table>
'''Crystal Structure of Schizosaccharomyces pombe Riboflavin Kinase Reveals a Novel ATP and Riboflavin Binding Fold'''
== Function ==
 
[https://www.uniprot.org/uniprot/RIFK_SCHPO RIFK_SCHPO] Catalyzes the phosphorylation of riboflavin (vitamin B2) to form flavin mononucleotide (FMN) coenzyme.
 
== Evolutionary Conservation ==
==Overview==
[[Image:Consurf_key_small.gif|200px|right]]
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.
Check<jmol>
 
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==About this Structure==
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1N06 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Schizosaccharomyces_pombe Schizosaccharomyces pombe]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1N06 OCA].  
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    <text>to colour the structure by Evolutionary Conservation</text>
==Reference==
  </jmolCheckbox>
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:[http://www.ncbi.nlm.nih.gov/pubmed/12595258 12595258]
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1n06 ConSurf].
[[Category: Riboflavin kinase]]
<div style="clear:both"></div>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Schizosaccharomyces pombe]]
[[Category: Schizosaccharomyces pombe]]
[[Category: Single protein]]
[[Category: Bacher A]]
[[Category: Bacher, A.]]
[[Category: Bauer S]]
[[Category: Bauer, S.]]
[[Category: Fischer M]]
[[Category: Fischer, M.]]
[[Category: Huber R]]
[[Category: Huber, R.]]
[[Category: Kemter K]]
[[Category: Kemter, K.]]
[[Category: Steinbacher S]]
[[Category: Steinbacher, S.]]
[[Category: Flavin cofactor]]
[[Category: Kinase]]
[[Category: Metal binding]]
[[Category: Phosphoryl transferase]]
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