2wmm

From Proteopedia

(Difference between revisions)

Revision as of 20:01, 19 September 2018

Crystal structure of the hinge domain of MukB

Structural highlights

2wmm is a 2 chain structure with sequence from Ecoli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	1qhl
Gene:	mukB, b0924, JW0907 (ECOLI)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[MUKB_ECOLI] Plays a central role in chromosome condensation, segregation and cell cycle progression. Functions as a homodimer, which is essential for chromosome partition. Involved in negative DNA supercoiling in vivo, and by this means organizes and compacts chromosomes. May achieve or facilitate chromosome segregation by condensation of DNA from both sides of a centrally located replisome during cell division. Stimulates both DNA relaxation and to a lesser extent decatenation activity of topoisomerase IV.^[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 structural maintenance of chromosomes (SMC) family proteins are commonly found in the multiprotein complexes involved in chromosome organization, including chromosome condensation and sister chromatid cohesion. These proteins are characterized by forming a V-shaped homo- or heterodimeric structure with two long coiled-coil arms having two ATPase head domains at the distal ends. The hinge domain, located in the middle of the coiled coil, forms the dimer interface. In addition to being the dimerization module, SMC hinges appear to play other roles, including the gateway function for DNA entry into the cohesin complex. Herein, we report the homodimeric structure of the hinge domain of Escherichia coli MukB, which forms a prokaryotic condensin complex with two non-SMC subunits, MukE and MukF. In contrast with SMC hinge of Thermotoga maritima which has a sizable central hole at the dimer interface, MukB hinge forms a constricted dimer interface lacking a hole. Under our assay conditions, MukB hinge does not interact with DNA in accordance with the absence of a notable positively charged surface patch. The function of MukB hinge appears to be limited to dimerization of two copies of MukB molecules. Proteins 2010. (c) 2009 Wiley-Liss, Inc.

Crystal structure of the MukB hinge domain with coiled-coil stretches and its functional implications.,Ku B, Lim JH, Shin HC, Shin SY, Oh BH Proteins. 2009 Nov 24. PMID:20034111^[3]

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

References

↑ Li Y, Stewart NK, Berger AJ, Vos S, Schoeffler AJ, Berger JM, Chait BT, Oakley MG. Escherichia coli condensin MukB stimulates topoisomerase IV activity by a direct physical interaction. Proc Natl Acad Sci U S A. 2010 Nov 2;107(44):18832-7. doi:, 10.1073/pnas.1008678107. Epub 2010 Oct 4. PMID:20921377 doi:http://dx.doi.org/10.1073/pnas.1008678107
↑ Sawitzke JA, Austin S. Suppression of chromosome segregation defects of Escherichia coli muk mutants by mutations in topoisomerase I. Proc Natl Acad Sci U S A. 2000 Feb 15;97(4):1671-6. PMID:10660686 doi:http://dx.doi.org/10.1073/pnas.030528397
↑ Ku B, Lim JH, Shin HC, Shin SY, Oh BH. Crystal structure of the MukB hinge domain with coiled-coil stretches and its functional implications. Proteins. 2009 Nov 24. PMID:20034111 doi:10.1002/prot.22664

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/2wmm"

@@ Line 3: / Line 3: @@
 <StructureSection load='2wmm' size='340' side='right' caption='[[2wmm]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2wmm]] is a 2 chain structure with 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=2WMM OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2WMM FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2wmm]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2WMM OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2WMM FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MLT:D-MALATE'>MLT</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1qhl|1qhl]]</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">mukB, b0924, JW0907 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</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=2wmm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2wmm OCA], [http://pdbe.org/2wmm PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2wmm RCSB], [http://www.ebi.ac.uk/pdbsum/2wmm PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2wmm ProSAT]</span></td></tr>
 </table>
@@ Line 14: / Line 15: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/wm/2wmm_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/wm/2wmm_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 33: / Line 34: @@
 __TOC__
 </StructureSection>
-[[Category: Escherichia coli]]
+[[Category: Ecoli]]
 [[Category: Ku, B]]
 [[Category: Oh, B H]]
@@ Line 40: / Line 41: @@
 [[Category: Cell division]]
 [[Category: Chromosome partition]]
+[[Category: Coiled coil]]
 [[Category: Condensin]]
+[[Category: Cytoplasm]]
 [[Category: Dna condensation]]
 [[Category: Dna-binding]]

2wmm

From Proteopedia

Revision as of 20:01, 19 September 2018

Crystal structure of the hinge domain of MukB

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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