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1ecx

From Proteopedia

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[[Image:1ecx.gif|left|200px]]
 
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{{Structure
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==NIFS-LIKE PROTEIN==
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|PDB= 1ecx |SIZE=350|CAPTION= <scene name='initialview01'>1ecx</scene>, resolution 2.70&Aring;
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<StructureSection load='1ecx' size='340' side='right'caption='[[1ecx]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=PLP:PYRIDOXAL-5'-PHOSPHATE'>PLP</scene> and <scene name='pdbligand=CYS:CYSTEINE'>CYS</scene>
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<table><tr><td colspan='2'>[[1ecx]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermotoga_maritima Thermotoga maritima]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ECX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1ECX FirstGlance]. <br>
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|ACTIVITY=
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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]] 2.7&#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=CYS:CYSTEINE'>CYS</scene>, <scene name='pdbligand=PLP:PYRIDOXAL-5-PHOSPHATE'>PLP</scene></td></tr>
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}}
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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=1ecx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ecx OCA], [https://pdbe.org/1ecx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ecx RCSB], [https://www.ebi.ac.uk/pdbsum/1ecx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ecx ProSAT]</span></td></tr>
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</table>
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'''NIFS-LIKE PROTEIN'''
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== Function ==
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[https://www.uniprot.org/uniprot/Q9X218_THEMA Q9X218_THEMA]
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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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NifS-like proteins are ubiquitous, homodimeric, proteins which belong to the alpha-family of pyridoxal-5'-phoshate dependent enzymes. They are proposed to donate elementary sulphur, generated from cysteine, via a cysteinepersulphide intermediate during iron sulphur cluster biosynthesis, an important albeit not well understood process. Here, we report on the crystal structure of a NifS-like protein from the hyperthermophilic bacterium Thermotoga maritima (tmNifS) at 2.0 A resolution. The tmNifS is structured into two domains, the larger bearing the pyridoxal-5'-phosphate-binding active site, the smaller hosting the active site cysteine in the middle of a highly flexible loop, 12 amino acid residues in length. Once charged with sulphur the loop could possibly deliver S(0) directly to regions far remote from the protein. Based on the three-dimensional structures of the native as well as the substrate complexed form and on spectrophotometric results, a mechanism of sulphur activation is proposed. The His99, which stacks on top of the pyridoxal-5'-phosphate co-factor, is assigned a crucial role during the catalytic cycle by acting as an acid-base catalyst and is believed to have a pK(a) value depending on the co-factor redox state.
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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/ec/1ecx_consurf.spt"</scriptWhenChecked>
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1ECX is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Thermotoga_maritima Thermotoga maritima]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ECX 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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Crystal structure of a NifS-like protein from Thermotoga maritima: implications for iron sulphur cluster assembly., Kaiser JT, Clausen T, Bourenkow GP, Bartunik HD, Steinbacher S, Huber R, J Mol Biol. 2000 Mar 24;297(2):451-64. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10715213 10715213]
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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=1ecx ConSurf].
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[[Category: Single protein]]
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<div style="clear:both"></div>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Thermotoga maritima]]
[[Category: Thermotoga maritima]]
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[[Category: Bartunik, H D.]]
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[[Category: Bartunik H-D]]
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[[Category: Bourenkow, G P.]]
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[[Category: Bourenkow GP]]
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[[Category: Clausen, T C.]]
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[[Category: Clausen TC]]
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[[Category: Huber, R.]]
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[[Category: Huber R]]
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[[Category: Kaiser, J T.]]
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[[Category: Kaiser JT]]
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[[Category: Steinbacher, S.]]
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[[Category: Steinbacher S]]
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[[Category: CYS]]
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[[Category: PLP]]
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[[Category: c-s beta lyase]]
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[[Category: iron-sulfur-cluster synthesis]]
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[[Category: plp-dependent enzyme]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 10:53:50 2008''
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Current revision

NIFS-LIKE PROTEIN

PDB ID 1ecx

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