1hyu

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[[Image:1hyu.gif|left|200px]]
 
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==CRYSTAL STRUCTURE OF INTACT AHPF==
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The line below this paragraph, containing "STRUCTURE_1hyu", creates the "Structure Box" on the page.
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<StructureSection load='1hyu' size='340' side='right'caption='[[1hyu]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1hyu]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Salmonella_enterica_subsp._enterica_serovar_Typhimurium Salmonella enterica subsp. enterica serovar Typhimurium]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HYU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1HYU 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=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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{{STRUCTURE_1hyu| PDB=1hyu | SCENE= }}
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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=1hyu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hyu OCA], [https://pdbe.org/1hyu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1hyu RCSB], [https://www.ebi.ac.uk/pdbsum/1hyu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1hyu ProSAT]</span></td></tr>
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</table>
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'''CRYSTAL STRUCTURE OF INTACT AHPF'''
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== Function ==
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[https://www.uniprot.org/uniprot/AHPF_SALTY AHPF_SALTY] Serves to protect the cell against DNA damage by alkyl hydroperoxides. It can use either NADH or NADPH as electron donor for direct reduction of redox dyes or of alkyl hydroperoxides when combined with the AhpC protein.
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== Evolutionary Conservation ==
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==Overview==
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[[Image:Consurf_key_small.gif|200px|right]]
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AhpF, a homodimer of 57 kDa subunits, is a flavoenzyme which catalyzes the NADH-dependent reduction of redox-active disulfide bonds in the peroxidase AhpC, a member of the recently identified peroxiredoxin class of antioxidant enzymes. The structure of AhpF from Salmonella typhimurium at 2.0 A resolution, determined using multiwavelength anomalous dispersion, shows that the C-terminal portion of AhpF (residues 210-521) is structurally like Escherichia coli thioredoxin reductase. In addition, AhpF has an N-terminal domain (residues 1-196) formed from two contiguous thioredoxin folds, but containing just a single redox-active disulfide (Cys129-Cys132). A flexible linker (residues 197-209) connects the domains, consistent with experiments showing that the N-terminal domain acts as an appended substrate, first being reduced by the C-terminal portion of AhpF, and subsequently reducing AhpC. Modeling studies imply that an intrasubunit electron transfer accounts for the reduction of the N-terminal domain in dimeric AhpF. Furthermore, comparing the N-terminal domain with protein disulfide oxidoreductase from Pyrococcus furiosis, we describe a new class of protein disulfide oxidoreductases based on a novel mirror-image active site arrangement, with a distinct carboxylate (Glu86) being functionally equivalent to the key acid (Asp26) of E. coli thioredoxin. A final fortuitous result is that the N-terminal redox center is reduced and provides a high-resolution view of the thiol-thiolate hydrogen bond that has been predicted to stabilize the attacking thiolate in thioredoxin-like proteins.
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Check<jmol>
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<jmolCheckbox>
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==About this Structure==
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/hy/1hyu_consurf.spt"</scriptWhenChecked>
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1HYU is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Salmonella_typhimurium Salmonella typhimurium]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HYU OCA].
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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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==Reference==
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</jmolCheckbox>
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Structure of intact AhpF reveals a mirrored thioredoxin-like active site and implies large domain rotations during catalysis., Wood ZA, Poole LB, Karplus PA, Biochemistry. 2001 Apr 3;40(13):3900-11. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11300769 11300769]
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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=1hyu ConSurf].
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[[Category: Salmonella typhimurium]]
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<div style="clear:both"></div>
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[[Category: Single protein]]
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__TOC__
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[[Category: Karplus, P A.]]
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</StructureSection>
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[[Category: Poole, L B.]]
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[[Category: Large Structures]]
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[[Category: Wood, Z A.]]
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[[Category: Salmonella enterica subsp. enterica serovar Typhimurium]]
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[[Category: Nucleotide binding fold]]
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[[Category: Karplus PA]]
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[[Category: Thiol-thiolate hydrogen bond]]
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[[Category: Poole LB]]
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[[Category: Thioredoxin]]
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[[Category: Wood ZA]]
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[[Category: Thioredoxin reductase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 19:22:30 2008''
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Current revision

CRYSTAL STRUCTURE OF INTACT AHPF

PDB ID 1hyu

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