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New page: left|200px<br /><applet load="1hw2" size="450" color="white" frame="true" align="right" spinBox="true" caption="1hw2, resolution 3.25Å" /> '''FADR-DNA COMPLEX: TR...
 
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[[Image:1hw2.gif|left|200px]]<br /><applet load="1hw2" size="450" color="white" frame="true" align="right" spinBox="true"
caption="1hw2, resolution 3.25&Aring;" />
'''FADR-DNA COMPLEX: TRANSCRIPTIONAL CONTROL OF FATTY ACID METABOLISM IN ECHERICHIA COLI'''<br />


==Overview==
==FADR-DNA COMPLEX: TRANSCRIPTIONAL CONTROL OF FATTY ACID METABOLISM IN ECHERICHIA COLI==
In Escherichia coli, the expression of fatty acid metabolic genes is, controlled by the transcription factor, FadR. The affinity of FadR for DNA, is controlled by long chain acyl-CoA molecules, which bind to the protein, and modulate gene expression. The crystal structure of FadR reveals a two, domain dimeric molecule where the N-terminal domains bind DNA, and the, C-terminal domains bind acyl-CoA. The DNA binding domain has a, winged-helix motif, and the C-terminal domain resembles the sensor domain, of the Tet repressor. The FadR.DNA complex reveals how the protein, interacts with DNA and specifically recognizes a palindromic sequence., Structural and functional similarities to the Tet repressor and the BmrR, transcription factors suggest how the binding of the acyl-CoA effector, molecule to the C-terminal domain may affect the DNA binding affinity of, the N-terminal domain. We suggest that the binding of acyl-CoA disrupts a, buried network of charged and polar residues in the C-terminal domain, and, the resulting conformational change is transmitted to the N-terminal, domain via a domain-spanning alpha-helix.
<StructureSection load='1hw2' size='340' side='right'caption='[[1hw2]], [[Resolution|resolution]] 3.25&Aring;' scene=''>
 
== Structural highlights ==
==About this Structure==
<table><tr><td colspan='2'>[[1hw2]] is a 4 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=1HW2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1HW2 FirstGlance]. <br>
1HW2 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] with MG as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1HW2 OCA].  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.25&#8491;</td></tr>
 
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
==Reference==
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1hw2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hw2 OCA], [https://pdbe.org/1hw2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1hw2 RCSB], [https://www.ebi.ac.uk/pdbsum/1hw2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1hw2 ProSAT]</span></td></tr>
The FadR.DNA complex. Transcriptional control of fatty acid metabolism in Escherichia coli., Xu Y, Heath RJ, Li Z, Rock CO, White SW, J Biol Chem. 2001 May 18;276(20):17373-9. Epub 2001 Feb 13. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11279025 11279025]
</table>
== Function ==
[https://www.uniprot.org/uniprot/FADR_ECOLI FADR_ECOLI] Multifunctional regulator of fatty acid metabolism. Represses transcription of at least eight genes required for fatty acid transport and beta-oxidation including fadA, fadB, fadD, fadL and fadE. Activates transcription of at least three genes required for unsaturated fatty acid biosynthesis: fabA, fabB and iclR, the gene encoding the transcriptional regulator of the aceBAK operon encoding the glyoxylate shunt enzymes. Binding of FadR is specifically inhibited by long chain fatty acyl-CoA compounds.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/hw/1hw2_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=1hw2 ConSurf].
<div style="clear:both"></div>
__TOC__
</StructureSection>
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Heath, R.J.]]
[[Category: Heath RJ]]
[[Category: Li, Z.]]
[[Category: Li Z]]
[[Category: Rock, C.O.]]
[[Category: Rock CO]]
[[Category: White, S.W.]]
[[Category: White SW]]
[[Category: Xu, Y.]]
[[Category: Xu Y]]
[[Category: MG]]
[[Category: helix bundle]]
[[Category: helix-turn-helix]]
[[Category: protein-dna complex]]
 
''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 16:51:47 2007''

Latest revision as of 07:30, 7 February 2024

FADR-DNA COMPLEX: TRANSCRIPTIONAL CONTROL OF FATTY ACID METABOLISM IN ECHERICHIA COLI

1hw2, resolution 3.25Å

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