3fis

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[[Image:3fis.gif|left|200px]]
 
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==THE MOLECULAR STRUCTURE OF WILD-TYPE AND A MUTANT FIS PROTEIN: RELATIONSHIP BETWEEN MUTATIONAL CHANGES AND RECOMBINATIONAL ENHANCER FUNCTION OR DNA BINDING==
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The line below this paragraph, containing "STRUCTURE_3fis", creates the "Structure Box" on the page.
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<StructureSection load='3fis' size='340' side='right'caption='[[3fis]], [[Resolution|resolution]] 2.30&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'>[[3fis]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3FIS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3FIS 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]] 2.3&#8491;</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=3fis FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3fis OCA], [https://pdbe.org/3fis PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3fis RCSB], [https://www.ebi.ac.uk/pdbsum/3fis PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3fis ProSAT]</span></td></tr>
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{{STRUCTURE_3fis| PDB=3fis | SCENE= }}
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/FIS_ECOLI FIS_ECOLI] Activates ribosomal RNA transcription, as well other genes. Plays a direct role in upstream activation of rRNA promoters. Binds to a recombinational enhancer sequence that is required to stimulate hin-mediated DNA inversion. Prevents initiation of DNA replication from oriC.<ref>PMID:2209559</ref> <ref>PMID:8836178</ref>
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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/fi/3fis_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=3fis ConSurf].
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<div style="clear:both"></div>
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'''THE MOLECULAR STRUCTURE OF WILD-TYPE AND A MUTANT FIS PROTEIN: RELATIONSHIP BETWEEN MUTATIONAL CHANGES AND RECOMBINATIONAL ENHANCER FUNCTION OR DNA BINDING'''
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==See Also==
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*[[FIS protein|FIS protein]]
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== References ==
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==Overview==
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<references/>
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The 98-amino acid Fis protein from Escherichia coli functions in a variety of reactions, including promotion of Hin-mediated site-specific DNA inversion when bound to an enhancer sequence. It is unique among site-specific DNA-binding proteins in that it binds to a large number of different DNA sequences, for which a consensus sequence is difficult to establish. X-ray crystal structure analyses have been carried out at 2.3 A resolution for wild-type Fis and for an Arg-89----Cys mutant that does not stimulate DNA inversion. Each monomer of the Fis dimer has four alpha-helices, A-D; the first 19 residues are disordered in the crystal. The end of each C helix is hydrogen bonded to the beginning of helix B' from the opposite subunit in what effectively is one long continuous, although bent, helix. The four helices, C, B', C', and B, together define a platform through the center of the Fis molecule: helices A and A' are believed to be involved with Hin recombinase on one side, and helices D and D' interact with DNA lying on the other side of the platform. Helices C and D of each subunit comprise a helix-turn-helix (HTH) DNA-binding element. The spacing of these two HTH elements in the dimer, 25 A, is too short to allow insertion into adjacent major grooves of a straight B-DNA helix. However, bending the DNA at discrete points, to an overall radius of curvature of 62 A, allows efficient docking of a B-DNA helix with the Fis molecule. The proposed complex explains the experimentally observed patterns of methylation protection and DNase I cleavage hypersensitivity. The x-ray structure accounts for the effects of mutations in the Fis sequence. Those that affect DNA inversion but not DNA binding are located within the N-terminal disordered region and helix A. This inversion activation domain is physically separated in the Fis molecule from the HTH elements and may specify a region of contact with the Hin recombinase. In contrast, mutations that affect HTH helices C and D, or interactions of these with helix B, have the additional effect of decreasing or eliminating binding to DNA.
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__TOC__
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</StructureSection>
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==About this Structure==
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3FIS is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3FIS OCA].
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==Reference==
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The molecular structure of wild-type and a mutant Fis protein: relationship between mutational changes and recombinational enhancer function or DNA binding., Yuan HS, Finkel SE, Feng JA, Kaczor-Grzeskowiak M, Johnson RC, Dickerson RE, Proc Natl Acad Sci U S A. 1991 Nov 1;88(21):9558-62. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/1946369 1946369]
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[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Dickerson, R E.]]
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[[Category: Dickerson RE]]
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[[Category: Feng, J-A.]]
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[[Category: Feng J-A]]
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[[Category: Finkel, S E.]]
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[[Category: Finkel SE]]
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[[Category: Johnson, R C.]]
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[[Category: Johnson RC]]
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[[Category: Yuan, H S.]]
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[[Category: Yuan HS]]
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[[Category: Dna-binding protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 22:01:46 2008''
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Current revision

THE MOLECULAR STRUCTURE OF WILD-TYPE AND A MUTANT FIS PROTEIN: RELATIONSHIP BETWEEN MUTATIONAL CHANGES AND RECOMBINATIONAL ENHANCER FUNCTION OR DNA BINDING

PDB ID 3fis

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