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| | <StructureSection load='4r5f' size='340' side='right'caption='[[4r5f]], [[Resolution|resolution]] 1.90Å' scene=''> | | <StructureSection load='4r5f' size='340' side='right'caption='[[4r5f]], [[Resolution|resolution]] 1.90Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4r5f]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Arcfu Arcfu]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4R5F OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4R5F FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4r5f]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Archaeoglobus_fulgidus_DSM_4304 Archaeoglobus fulgidus DSM 4304]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4R5F OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4R5F FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=PG4:TETRAETHYLENE+GLYCOL'>PG4</scene>, <scene name='pdbligand=PMP:4-DEOXY-4-AMINOPYRIDOXAL-5-PHOSPHATE'>PMP</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4hvk|4hvk]], [[4eb5|4eb5]], [[4eb7|4eb7]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=PG4:TETRAETHYLENE+GLYCOL'>PG4</scene>, <scene name='pdbligand=PMP:4-DEOXY-4-AMINOPYRIDOXAL-5-PHOSPHATE'>PMP</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">iscS2, AF_0564 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=224325 ARCFU])</td></tr>
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4r5f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4r5f OCA], [https://pdbe.org/4r5f PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4r5f RCSB], [https://www.ebi.ac.uk/pdbsum/4r5f PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4r5f ProSAT]</span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Cysteine_desulfurase Cysteine desulfurase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.8.1.7 2.8.1.7] </span></td></tr>
| + | |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4r5f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4r5f OCA], [http://pdbe.org/4r5f PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4r5f RCSB], [http://www.ebi.ac.uk/pdbsum/4r5f PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4r5f ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/ISCS2_ARCFU ISCS2_ARCFU]] Catalyzes the removal of elemental sulfur from cysteine to produce alanine (By similarity). | + | [https://www.uniprot.org/uniprot/ISCS2_ARCFU ISCS2_ARCFU] Catalyzes the removal of elemental sulfur from cysteine to produce alanine (By similarity). |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | ==See Also== | | ==See Also== |
| - | *[[Cysteine desulfurase|Cysteine desulfurase]] | + | *[[Cysteine desulfurase 3D structures|Cysteine desulfurase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Arcfu]] | + | [[Category: Archaeoglobus fulgidus DSM 4304]] |
| - | [[Category: Cysteine desulfurase]]
| + | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Fontecilla-Camps, J C]] | + | [[Category: Fontecilla-Camps JC]] |
| - | [[Category: Nicolet, Y]] | + | [[Category: Nicolet Y]] |
| - | [[Category: Pagnier, A]] | + | [[Category: Pagnier A]] |
| - | [[Category: Metal binding protein]]
| + | |
| Structural highlights
4r5f is a 1 chain structure with sequence from Archaeoglobus fulgidus DSM 4304. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Method: | X-ray diffraction, Resolution 1.9Å |
| Ligands: | , , , , |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
ISCS2_ARCFU Catalyzes the removal of elemental sulfur from cysteine to produce alanine (By similarity).
Publication Abstract from PubMed
Iron sulfur ([Fe-S]) clusters are essential prosthetic groups involved in fundamental cell processes such as gene expression regulation, electron transfer and Lewis acid base chemistry. Central components of their biogenesis are pyridoxal-5'-phosphate (PLP) dependent l-cysteine desulfurases, which provide the necessary S atoms for [Fe-S] cluster assembly. The archaeon Archaeoglobus fulgidus (Af) has two ORFs, which although annotated as l-cysteine desulfurases of the ISC type (IscS), lack the essential Lys residue (K199 in Af) that forms a Schiff base with PLP. We have previously determined the structure of an Af(IscU-D35A-IscS)2 complex heterologously expressed in Escherichia coli and found it to contain a [Fe2S2] cluster. In order to understand the origin of sulfide in that structure we have performed a series of functional tests using wild type and mutated forms of AfIscS. In addition, we have determined the crystal structure of an AfIscS-D199K mutant. From these studies we conclude that: i) AfIscS has no desulfurase activity; ii) in our in vitro [Fe2S2] cluster assembly experiments, sulfide ions are non-enzymatically generated by a mixture of iron, l-cysteine and PLP and iii) the physiological role of AfIscS may be to provide a cysteine ligand to the nascent cluster as observed in the [Fe2S2]-Af(IscU-D35A-IscS)2 complex. This article is part of a Special Issue entitled: Fe/S proteins: Analysis, structure, function, biogenesis and diseases.
IscS from Archaeoglobus fulgidus has no desulfurase activity but may provide a cysteine ligand for [FeS] cluster assembly.,Pagnier A, Nicolet Y, Fontecilla-Camps JC Biochim Biophys Acta. 2014 Oct 28. pii: S0167-4889(14)00374-7. doi:, 10.1016/j.bbamcr.2014.10.015. PMID:25447670[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Pagnier A, Nicolet Y, Fontecilla-Camps JC. IscS from Archaeoglobus fulgidus has no desulfurase activity but may provide a cysteine ligand for [FeS] cluster assembly. Biochim Biophys Acta. 2014 Oct 28. pii: S0167-4889(14)00374-7. doi:, 10.1016/j.bbamcr.2014.10.015. PMID:25447670 doi:http://dx.doi.org/10.1016/j.bbamcr.2014.10.015
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