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| | <StructureSection load='2a13' size='340' side='right'caption='[[2a13]], [[Resolution|resolution]] 1.32Å' scene=''> | | <StructureSection load='2a13' size='340' side='right'caption='[[2a13]], [[Resolution|resolution]] 1.32Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2a13]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Arath Arath]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2A13 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2A13 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2a13]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2A13 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2A13 FirstGlance]. <br> |
| - | </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> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.32Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">AT1G79260 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=3702 ARATH])</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></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=2a13 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2a13 OCA], [https://pdbe.org/2a13 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2a13 RCSB], [https://www.ebi.ac.uk/pdbsum/2a13 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2a13 ProSAT], [https://www.topsan.org/Proteins/CESG/2a13 TOPSAN]</span></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=2a13 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2a13 OCA], [https://pdbe.org/2a13 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2a13 RCSB], [https://www.ebi.ac.uk/pdbsum/2a13 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2a13 ProSAT], [https://www.topsan.org/Proteins/CESG/2a13 TOPSAN]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/Y1926_ARATH Y1926_ARATH]] May play a role in the intracellular transport of hydrophobic ligands (Potential).
| + | [https://www.uniprot.org/uniprot/NB_ARATH NB_ARATH] Heme-binding protein able to scavenge peroxynitrite and to protect free L-tyrosine against peroxynitrite-mediated nitration, by acting as a peroxynitrite isomerase that converts peroxynitrite to nitrate. Therefore, this protein likely plays a role in peroxynitrite sensing and in the detoxification of reactive nitrogen and oxygen species (RNS and ROS, respectively) (PubMed:32295384). Is able to bind nitric oxide (NO) in vitro, but may act as a sensor of peroxynitrite levels in vivo (PubMed:32295384, PubMed:19938152).<ref>PMID:19938152</ref> <ref>PMID:32295384</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Arath]] | + | [[Category: Arabidopsis thaliana]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Allard, S T.M]] | + | [[Category: Allard STM]] |
| - | [[Category: Bingman, C A]] | + | [[Category: Bingman CA]] |
| - | [[Category: Bitto, E]] | + | [[Category: Bitto E]] |
| - | [[Category: Structural genomic]]
| + | [[Category: McCoy JG]] |
| - | [[Category: McCoy, J G]] | + | [[Category: Phillips Jr GN]] |
| - | [[Category: Phillips, G N]] | + | [[Category: Wesenberg GE]] |
| - | [[Category: Wesenberg, G E]] | + | |
| - | [[Category: At1g79260]]
| + | |
| - | [[Category: Cesg]]
| + | |
| - | [[Category: PSI, Protein structure initiative]]
| + | |
| - | [[Category: Unknown function]]
| + | |
| Structural highlights
Function
NB_ARATH Heme-binding protein able to scavenge peroxynitrite and to protect free L-tyrosine against peroxynitrite-mediated nitration, by acting as a peroxynitrite isomerase that converts peroxynitrite to nitrate. Therefore, this protein likely plays a role in peroxynitrite sensing and in the detoxification of reactive nitrogen and oxygen species (RNS and ROS, respectively) (PubMed:32295384). Is able to bind nitric oxide (NO) in vitro, but may act as a sensor of peroxynitrite levels in vivo (PubMed:32295384, PubMed:19938152).[1] [2]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The protein from Arabidopsis thaliana gene locus At1g79260.1 is comprised of 166-residues and is of previously unknown function. Initial structural studies by the Center for Eukaryotic Structural Genomics (CESG) suggested that this protein might bind heme, and consequently, the crystal structures of apo and heme-bound forms were solved to near atomic resolution of 1.32 A and 1.36 A, respectively. The rate of hemin loss from the protein was measured to be 3.6 x 10(-5) s(-1), demonstrating that it binds heme specifically and with high affinity. The protein forms a compact 10-stranded beta-barrel that is structurally similar to the lipocalins and fatty acid binding proteins (FABPs). One group of lipocalins, the nitrophorins (NP), are heme proteins involved in nitric oxide (NO) transport and show both sequence and structural similarity to the protein from At1g79260.1 and two human homologues, all of which contain a proximal histidine capable of coordinating a heme iron. Rapid-mixing and laser photolysis techniques were used to determine the rate constants for carbon monoxide (CO) binding to the ferrous form of the protein (k'(CO) = 0.23 microM(-1) s(-1), k(CO) = 0.050 s(-1)) and NO binding to the ferric form (k'(NO) = 1.2 microM(-1) s(-1), k(NO) = 73 s(-1)). Based on both structural and functional similarity to the nitrophorins, we have named the protein nitrobindin and hypothesized that it plays a role in NO transport. However, one of the two human homologs of nitrobindin contains a THAP domain, implying a possible role in apoptosis. Proteins 2010. (c) 2009 Wiley-Liss, Inc.
The structure and NO binding properties of the nitrophorin-like heme-binding protein from Arabidopsis thaliana gene locus At1g79260.1.,Bianchetti CM, Blouin GC, Bitto E, Olson JS, Phillips GN Jr Proteins. 2010 Mar;78(4):917-31. PMID:19938152[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Bianchetti CM, Blouin GC, Bitto E, Olson JS, Phillips GN Jr. The structure and NO binding properties of the nitrophorin-like heme-binding protein from Arabidopsis thaliana gene locus At1g79260.1. Proteins. 2010 Mar;78(4):917-31. PMID:19938152 doi:10.1002/prot.22617
- ↑ De Simone G, di Masi A, Vita GM, Polticelli F, Pesce A, Nardini M, Bolognesi M, Ciaccio C, Coletta M, Turilli ES, Fasano M, Tognaccini L, Smulevich G, Abbruzzetti S, Viappiani C, Bruno S, Ascenzi P. Mycobacterial and human nitrobindins: structure and function. Antioxid Redox Signal. 2020 Apr 16. doi: 10.1089/ars.2019.7874. PMID:32295384 doi:http://dx.doi.org/10.1089/ars.2019.7874
- ↑ Bianchetti CM, Blouin GC, Bitto E, Olson JS, Phillips GN Jr. The structure and NO binding properties of the nitrophorin-like heme-binding protein from Arabidopsis thaliana gene locus At1g79260.1. Proteins. 2010 Mar;78(4):917-31. PMID:19938152 doi:10.1002/prot.22617
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