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1dfo

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[[Image:1dfo.gif|left|200px]]
 
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{{Structure
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==CRYSTAL STRUCTURE AT 2.4 ANGSTROM RESOLUTION OF E. COLI SERINE HYDROXYMETHYLTRANSFERASE IN COMPLEX WITH GLYCINE AND 5-FORMYL TETRAHYDROFOLATE==
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|PDB= 1dfo |SIZE=350|CAPTION= <scene name='initialview01'>1dfo</scene>, resolution 2.40&Aring;
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<StructureSection load='1dfo' size='340' side='right'caption='[[1dfo]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=FFO:5-FORMYL-6-HYDROFOLIC+ACID'>FFO</scene>, <scene name='pdbligand=PLG:N-GLYCINE-[3-HYDROXY-2-METHYL-5-PHOSPHONOOXYMETHYL-PYRIDIN-4-YL-METHANE]'>PLG</scene>
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<table><tr><td colspan='2'>[[1dfo]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DFO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DFO FirstGlance]. <br>
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Glycine_hydroxymethyltransferase Glycine hydroxymethyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.2.1 2.1.2.1] </span>
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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]] 2.4&#8491;</td></tr>
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|GENE=
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FFO:N-[4-({[(6S)-2-AMINO-5-FORMYL-4-OXO-3,4,5,6,7,8-HEXAHYDROPTERIDIN-6-YL]METHYL}AMINO)BENZOYL]-L-GLUTAMIC+ACID'>FFO</scene>, <scene name='pdbligand=PLG:N-GLYCINE-[3-HYDROXY-2-METHYL-5-PHOSPHONOOXYMETHYL-PYRIDIN-4-YL-METHANE]'>PLG</scene></td></tr>
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|DOMAIN=
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1dfo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dfo OCA], [https://pdbe.org/1dfo PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1dfo RCSB], [https://www.ebi.ac.uk/pdbsum/1dfo PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1dfo ProSAT]</span></td></tr>
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|RELATEDENTRY=
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</table>
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1dfo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dfo OCA], [http://www.ebi.ac.uk/pdbsum/1dfo PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1dfo RCSB]</span>
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== Function ==
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}}
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[https://www.uniprot.org/uniprot/GLYA_ECOLI GLYA_ECOLI] Catalyzes the reversible interconversion of serine and glycine with tetrahydrofolate (THF) serving as the one-carbon carrier. This reaction serves as the major source of one-carbon groups required for the biosynthesis of purines, thymidylate, methionine, and other important biomolecules. Also exhibits THF-independent aldolase activity toward beta-hydroxyamino acids, producing glycine and aldehydes, via a retro-aldol mechanism. Thus, is able to catalyze the cleavage of allothreonine and 3-phenylserine. Also catalyzes the irreversible conversion of 5,10-methenyltetrahydrofolate to 5-formyltetrahydrofolate.<ref>PMID:6190704</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/df/1dfo_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=1dfo ConSurf].
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<div style="clear:both"></div>
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'''CRYSTAL STRUCTURE AT 2.4 ANGSTROM RESOLUTION OF E. COLI SERINE HYDROXYMETHYLTRANSFERASE IN COMPLEX WITH GLYCINE AND 5-FORMYL TETRAHYDROFOLATE'''
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==See Also==
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*[[Serine hydroxymethyltransferase 3D structures|Serine hydroxymethyltransferase 3D structures]]
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== References ==
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==Overview==
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<references/>
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Serine hydroxymethyltransferase (EC 2.1.2.1), a member of the alpha-class of pyridoxal phosphate enzymes, catalyzes the reversible interconversion of serine and glycine, changing the chemical bonding at the C(alpha)-C(beta) bond of the serine side-chain mediated by the pyridoxal phosphate cofactor. Scission of the C(alpha)-C(beta) bond of serine substrate produces a glycine product and most likely formaldehyde, which reacts without dissociation with tetrahydropteroylglutamate cofactor. Crystal structures of the human and rabbit cytosolic serine hydroxymethyltransferases (SHMT) confirmed their close similarity in tertiary and dimeric subunit structure to each other and to aspartate aminotransferase, the archetypal alpha-class pyridoxal 5'-phosphate enzyme. We describe here the structure at 2.4 A resolution of Escherichia coli serine hydroxymethyltransferase in ternary complex with glycine and 5-formyl tetrahydropteroylglutamate, refined to an R-factor value of 17.4 % and R(free) value of 19.6 %. This structure reveals the interactions of both cofactors and glycine substrate with the enzyme. Comparison with the E. coli aspartate aminotransferase structure shows the distinctions in sequence and structure which define the folate cofactor binding site in serine hydroxymethyltransferase and the differences in orientation of the amino terminal arm, the evolution of which was necessary for elaboration of the folate binding site. Comparison with the unliganded rabbit cytosolic serine hydroxymethyltransferase structure identifies changes in the conformation of the enzyme, similar to those observed in aspartate aminotransferase, that probably accompany the binding of substrate. The tetrameric quaternary structure of liganded E. coli serine hydroxymethyltransferase also differs in symmetry and relative disposition of the functional tight dimers from that of the unliganded eukaryotic enzymes. SHMT tetramers have surface charge distributions which suggest distinctions in folate binding between eukaryotic and E. coli enzymes. The structure of the E. coli ternary complex provides the basis for a thorough investigation of its mechanism through characterization and structure determination of site mutants.
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__TOC__
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</StructureSection>
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==About this Structure==
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1DFO is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DFO OCA].
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==Reference==
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Crystal structure at 2.4 A resolution of E. coli serine hydroxymethyltransferase in complex with glycine substrate and 5-formyl tetrahydrofolate., Scarsdale JN, Radaev S, Kazanina G, Schirch V, Wright HT, J Mol Biol. 2000 Feb 11;296(1):155-68. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10656824 10656824]
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[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Glycine hydroxymethyltransferase]]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Kazanina G]]
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[[Category: Kazanina, G.]]
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[[Category: Radaev S]]
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[[Category: Radaev, S.]]
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[[Category: Scarsdale JN]]
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[[Category: Scarsdale, J N.]]
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[[Category: Schirch V]]
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[[Category: Schirch, V.]]
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[[Category: Wright HT]]
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[[Category: Wright, H T.]]
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[[Category: (aat)-like fold]]
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[[Category: alpha plp aspartate]]
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[[Category: amino transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 19:40:43 2008''
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Current revision

CRYSTAL STRUCTURE AT 2.4 ANGSTROM RESOLUTION OF E. COLI SERINE HYDROXYMETHYLTRANSFERASE IN COMPLEX WITH GLYCINE AND 5-FORMYL TETRAHYDROFOLATE

PDB ID 1dfo

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