1flv

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(New page: 200px<br /><applet load="1flv" size="450" color="white" frame="true" align="right" spinBox="true" caption="1flv, resolution 2.0&Aring;" /> '''STRUCTURE OF THE OXID...)
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[[Image:1flv.gif|left|200px]]<br /><applet load="1flv" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1flv, resolution 2.0&Aring;" />
 
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'''STRUCTURE OF THE OXIDIZED LONG CHAIN FLAVODOXIN FROM ANABAENA 7120 AT 2 ANGSTROMS RESOLUTION'''<br />
 
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==Overview==
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==STRUCTURE OF THE OXIDIZED LONG CHAIN FLAVODOXIN FROM ANABAENA 7120 AT 2 ANGSTROMS RESOLUTION==
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The structure of the long-chain flavodoxin from the photosynthetic, cyanobacterium Anabaena 7120 has been determined at 2 A resolution by the, molecular replacement method using the atomic coordinates of the, long-chain flavodoxin from Anacystis nidulans. The structure of a third, long-chain flavodoxin from Chondrus crispus has recently been reported., Crystals of oxidized A. 7120 flavodoxin belong to the monoclinic space, group P2(1) with a = 48.0, b = 32.0, c = 51.6 A, and beta = 92 degrees, and one molecule in the asymmetric unit. The 2 A intensity data were, collected with oscillation films at the CHESS synchrotron source and, processed to yield 9,795 independent intensities with Rmerg of 0.07. Of, these, 8,493 reflections had I &gt; 2 sigma and were used in the analysis., The model obtained by molecular replacement was initially refined by, simulated annealing using the XPLOR program. Repeated refitting into omit, maps and several rounds of conjugate gradient refinement led to an R-value, of 0.185 for a model containing atoms for protein residues 2-169, flavin, mononucleotide (FMN), and 104 solvent molecules. The FMN shows many, interactions with the protein with the isoalloxazine ring, ribityl sugar, and the 5'-phosphate. The flavin ring has its pyrimidine end buried into, the protein, and the functional dimethyl benzene edge is accessible to, solvent. The FMN interactions in all three long-chain structures are, similar except for the O4' of the ribityl chain, which interacts with the, hydroxyl group of Thr 88 side chain in A. 7120, while with a water, molecule in the other two. The phosphate group interacts with the atoms of, the 9-15 loop as well as with NE1 of Trp 57. The N5 atom of flavin, interacts with the amide NH of Ile 59 in A. 7120, whereas in A. nidulans, it interacts with the amide NH of Val 59 in a similar manner. In C., crispus flavodoxin, N5 forms a hydrogen bond with the side chain hydroxyl, group of the equivalent Thr 58. The hydrogen bond distances to the, backbone NH groups in the first two flavodoxins are 3.6 A and 3.5 A, respectively, whereas in the third flavodoxin the distance is 3.1 A, close, to the normal value. Even though the hydrogen bond distances are long in, the first two cases, still they might have significant energy because, their microenvironment in the protein is not accessible to, solvent.(ABSTRACT TRUNCATED AT 400 WORDS)
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<StructureSection load='1flv' size='340' side='right'caption='[[1flv]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1flv]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Nostoc_sp._PCC_7120_=_FACHB-418 Nostoc sp. PCC 7120 = FACHB-418]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FLV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1FLV 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=FMN:FLAVIN+MONONUCLEOTIDE'>FMN</scene></td></tr>
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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=1flv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1flv OCA], [https://pdbe.org/1flv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1flv RCSB], [https://www.ebi.ac.uk/pdbsum/1flv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1flv ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/FLAV_NOSS1 FLAV_NOSS1] Low-potential electron donor to a number of redox enzymes.
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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/fl/1flv_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=1flv ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1FLV is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Anabaena_sp. Anabaena sp.] with FMN as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1FLV OCA].
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*[[Flavodoxin 3D structures|Flavodoxin 3D structures]]
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__TOC__
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==Reference==
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</StructureSection>
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Structure of the oxidized long-chain flavodoxin from Anabaena 7120 at 2 A resolution., Rao ST, Shaffie F, Yu C, Satyshur KA, Stockman BJ, Markley JL, Sundarlingam M, Protein Sci. 1992 Nov;1(11):1413-27. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=1303762 1303762]
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[[Category: Large Structures]]
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[[Category: Anabaena sp.]]
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[[Category: Nostoc sp. PCC 7120 = FACHB-418]]
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[[Category: Single protein]]
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[[Category: Rao ST]]
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[[Category: Rao, S.T.]]
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[[Category: Sundaralingam M]]
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[[Category: Sundaralingam, M.]]
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[[Category: FMN]]
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[[Category: electron transport]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 15:01:36 2007''
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Current revision

STRUCTURE OF THE OXIDIZED LONG CHAIN FLAVODOXIN FROM ANABAENA 7120 AT 2 ANGSTROMS RESOLUTION

PDB ID 1flv

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