1dnl

<table><tr><td colspan='2'>[[1dnl]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DNL OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DNL FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FMN:FLAVIN+MONONUCLEOTIDE'>FMN</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr>

<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Pyridoxal_5'-phosphate_synthase Pyridoxal 5'-phosphate synthase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.4.3.5 1.4.3.5] </span></td></tr>

[[https://www.uniprot.org/uniprot/PDXH_ECOLI PDXH_ECOLI]] Catalyzes the oxidation of either pyridoxine 5'-phosphate (PNP) or pyridoxamine 5'-phosphate (PMP) into pyridoxal 5'-phosphate (PLP).[HAMAP-Rule:MF_01629]

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== Publication Abstract from PubMed ==

BACKGROUND: Escherichia coli pyridoxine 5'-phosphate oxidase (PNPOx) catalyzes the terminal step in the biosynthesis of pyridoxal 5'-phosphate (PLP), a cofactor used by many enzymes involved in amino acid metabolism. The enzyme oxidizes either the 4'-hydroxyl group of pyridoxine 5'-phosphate (PNP) or the 4'-primary amine of pyridoxamine 5'-phosphate (PMP) to an aldehyde. PNPOx is a homodimeric enzyme with one flavin mononucleotide (FMN) molecule non-covalently bound to each subunit. A high degree of sequence homology among the 15 known members of the PNPOx family suggests that all members of this group have similar three-dimensional folds. RESULTS: The crystal structure of PNPOx from E. coli has been determined to 1.8 A resolution. The monomeric subunit folds into an eight-stranded beta sheet surrounded by five alpha-helical structures. Two monomers related by a twofold axis interact extensively along one-half of each monomer to form the dimer. There are two clefts at the dimer interface that are symmetry-related and extend from the top to the bottom of the dimer. An FMN cofactor that makes interactions with both subunits is located in each of these two clefts. CONCLUSIONS: The structure is quite similar to the recently deposited 2.7 A structure of Saccharomyces cerevisiae PNPOx and also, remarkably, shares a common structural fold with the FMN-binding protein from Desulfovibrio vulgaris and a domain of chymotrypsin. This high-resolution E. coli PNPOx structure permits predictions to be made about residues involved in substrate binding and catalysis. These predictions provide testable hypotheses, which can be answered by making site-directed mutants.

X-ray structure of Escherichia coli pyridoxine 5'-phosphate oxidase complexed with FMN at 1.8 A resolution.,Safo MK, Mathews I, Musayev FN, di Salvo ML, Thiel DJ, Abraham DJ, Schirch V Structure. 2000 Jul 15;8(7):751-62. PMID:10903950<ref>PMID:10903950</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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== References ==

<references/>

[[Category: Ecoli]]

[[Category: Abraham, D J]]

[[Category: Mathews, I]]

[[Category: Musayev, F N]]

[[Category: Safo, M K]]

[[Category: Salvo, M L.di]]

[[Category: Schirch, V]]

[[Category: Thiel, D J]]

[[Category: Beta barrel]]

[[Category: Protein-fmn complex]]