2i05: Difference between revisions

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[[Image:2i05.gif|left|200px]]


{{Structure
==Escherichia Coli Replication Terminator Protein (Tus) Complexed With TerA DNA==
|PDB= 2i05 |SIZE=350|CAPTION= <scene name='initialview01'>2i05</scene>, resolution 2.60&Aring;
<StructureSection load='2i05' size='340' side='right'caption='[[2i05]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
|SITE=  
== Structural highlights ==
|LIGAND= <scene name='pdbligand=IOD:IODIDE ION'>IOD</scene>
<table><tr><td colspan='2'>[[2i05]] is a 3 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=2I05 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2I05 FirstGlance]. <br>
|ACTIVITY=  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.6&#8491;</td></tr>
|GENE= tus ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli])
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IOD:IODIDE+ION'>IOD</scene></td></tr>
}}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2i05 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2i05 OCA], [https://pdbe.org/2i05 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2i05 RCSB], [https://www.ebi.ac.uk/pdbsum/2i05 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2i05 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/TUS_ECOLI TUS_ECOLI] Trans-acting protein required for termination of DNA replication. Binds to DNA replication terminator sequences (terA to terF) to prevent the passage of replication forks. The termination efficiency will be affected by the affinity of this protein for the terminator sequence.
== 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/i0/2i05_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=2i05 ConSurf].
<div style="clear:both"></div>


'''Escherichia Coli Replication Terminator Protein (Tus) Complexed With TerA DNA'''
==See Also==
 
*[[Replication Termination Protein|Replication Termination Protein]]
 
__TOC__
==Overview==
</StructureSection>
During chromosome synthesis in Escherichia coli, replication forks are blocked by Tus bound Ter sites on approach from one direction but not the other. To study the basis of this polarity, we measured the rates of dissociation of Tus from forked TerB oligonucleotides, such as would be produced by the replicative DnaB helicase at both the fork-blocking (nonpermissive) and permissive ends of the Ter site. Strand separation of a few nucleotides at the permissive end was sufficient to force rapid dissociation of Tus to allow fork progression. In contrast, strand separation extending to and including the strictly conserved G-C(6) base pair at the nonpermissive end led to formation of a stable locked complex. Lock formation specifically requires the cytosine residue, C(6). The crystal structure of the locked complex showed that C(6) moves 14 A from its normal position to bind in a cytosine-specific pocket on the surface of Tus.
 
==About this Structure==
2I05 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=2I05 OCA].
 
==Reference==
A molecular mousetrap determines polarity of termination of DNA replication in E. coli., Mulcair MD, Schaeffer PM, Oakley AJ, Cross HF, Neylon C, Hill TM, Dixon NE, Cell. 2006 Jun 30;125(7):1309-19. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16814717 16814717]
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Dixon, N E.]]
[[Category: Dixon NE]]
[[Category: Mulcair, M D.]]
[[Category: Mulcair MD]]
[[Category: Oakley, A J.]]
[[Category: Oakley AJ]]
[[Category: Schaeffer, P M.]]
[[Category: Schaeffer PM]]
[[Category: IOD]]
[[Category: protein-dna complex]]
[[Category: replication/dna complex]]
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 17:23:47 2008''

Latest revision as of 11:52, 25 October 2023

Escherichia Coli Replication Terminator Protein (Tus) Complexed With TerA DNAEscherichia Coli Replication Terminator Protein (Tus) Complexed With TerA DNA

Structural highlights

2i05 is a 3 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.6Å
Ligands:
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

TUS_ECOLI Trans-acting protein required for termination of DNA replication. Binds to DNA replication terminator sequences (terA to terF) to prevent the passage of replication forks. The termination efficiency will be affected by the affinity of this protein for the terminator sequence.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

2i05, resolution 2.60Å

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