1o7l

From Proteopedia

(Difference between revisions)

Revision as of 10:05, 1 November 2017

Molybdate-activated form of ModE from Escherichia coli

Structural highlights

1o7l is a 4 chain structure with sequence from "bacillus_coli"_migula_1895 "bacillus coli" migula 1895. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Related:	1b9m, 1b9n, 1h9r, 1h9s
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[MODE_ECOLI] The ModE-Mo complex acts as a repressor of the modABC operon, involved in the transport of molybdate. Upon binding molybdate, the conformation of the protein changes, promoting dimerization of ModE-Mo. The protein dimer is then competent to bind a DNA region, upstream of the modABC operon, which contains an 8-base inverted repeat 5'-TAACGTTA-3' flanked by two CAT boxes. Acts also as an enhancer of the expression of genes coding for molybdoenzymes, both directly and indirectly. ModE also interacts with tungstate.

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

ModE is a bacterial transcriptional regulator that orchestrates many aspects of molybdenum metabolism by binding to specific DNA sequences in a molybdate-dependent fashion. We present the crystal structure of Escherichia coli ModE in complex with molybdate, which was determined at 2.75A from a merohedrally twinned crystal (twin fraction approximately 0.30) with space group P4(3). We now have structures of ModE in both its "switched on" (ligand-bound) and "switched off" (apo) states. Comparison with the apo structure shows that ligand binding leads to extensive conformational changes not only in the molybdate-binding domain, but also in the DNA-binding domain. The most obvious difference is the loss of the pronounced asymmetry between the two chains of the ModE dimer, which had been a characteristic property of the apo structure. Another major change concerns the relative orientation of the two DNA-interacting winged helix-turn-helix motifs. Manual docking of an idealized DNA structure suggests that this conformational change should improve DNA binding of the activated molybdate-bound ModE.

Crystal structure of activated ModE reveals conformational changes involving both oxyanion and DNA-binding domains.,Schuttelkopf AW, Boxer DH, Hunter WN J Mol Biol. 2003 Feb 21;326(3):761-7. PMID:12581638^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Schuttelkopf AW, Boxer DH, Hunter WN. Crystal structure of activated ModE reveals conformational changes involving both oxyanion and DNA-binding domains. J Mol Biol. 2003 Feb 21;326(3):761-7. PMID:12581638

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1o7l"

@@ Line 1: / Line 1: @@
-==MOLYBDATE-ACTIVATED FORM OF MODE FROM ESCHERICHIA COLI==
+==Molybdate-activated form of ModE from Escherichia coli==
 <StructureSection load='1o7l' size='340' side='right' caption='[[1o7l]], [[Resolution|resolution]] 2.75&Aring;' scene=''>
 == Structural highlights ==
@@ Line 5: / Line 6: @@
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MOO:MOLYBDATE+ION'>MOO</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1b9m|1b9m]], [[1b9n|1b9n]], [[1h9r|1h9r]], [[1h9s|1h9s]]</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=1o7l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1o7l OCA], [http://pdbe.org/1o7l PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1o7l RCSB], [http://www.ebi.ac.uk/pdbsum/1o7l PDBsum]</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=1o7l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1o7l OCA], [http://pdbe.org/1o7l PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1o7l RCSB], [http://www.ebi.ac.uk/pdbsum/1o7l PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1o7l ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 17: / Line 18: @@
     <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/chain_selection.php?pdb_ID=2ata ConSurf].
+</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=1o7l ConSurf].
 <div style="clear:both"></div>
 <div style="background-color:#fffaf0;">

1o7l

From Proteopedia

Revision as of 10:05, 1 November 2017

Molybdate-activated form of ModE from Escherichia coli

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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