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| | ==Crystal structure of DNA polymerase III sliding clamp== | | ==Crystal structure of DNA polymerase III sliding clamp== |
| - | <StructureSection load='3p16' size='340' side='right' caption='[[3p16]], [[Resolution|resolution]] 2.89Å' scene=''> | + | <StructureSection load='3p16' size='340' side='right'caption='[[3p16]], [[Resolution|resolution]] 2.89Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3p16]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Myctu Myctu]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3P16 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3P16 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3p16]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Myctu Myctu]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3P16 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3P16 FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">dnaN, Rv0002, MT0002, MTV029.02, MTCY10H4.0 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83332 MYCTU])</td></tr> | + | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">dnaN, Rv0002, MT0002, MTV029.02, MTCY10H4.0 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83332 MYCTU])</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] </span></td></tr> | + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] </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=3p16 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3p16 OCA], [http://pdbe.org/3p16 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3p16 RCSB], [http://www.ebi.ac.uk/pdbsum/3p16 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3p16 ProSAT]</span></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=3p16 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3p16 OCA], [https://pdbe.org/3p16 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3p16 RCSB], [https://www.ebi.ac.uk/pdbsum/3p16 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3p16 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/DPO3B_MYCTU DPO3B_MYCTU]] DNA polymerase III is a complex, multichain enzyme responsible for most of the replicative synthesis in bacteria. This DNA polymerase also exhibits 3' to 5' exonuclease activity. The beta chain is required for initiation of replication once it is clamped onto DNA, it slides freely (bidirectional and ATP-independent) along duplex DNA (By similarity). | + | [[https://www.uniprot.org/uniprot/DPO3B_MYCTU DPO3B_MYCTU]] DNA polymerase III is a complex, multichain enzyme responsible for most of the replicative synthesis in bacteria. This DNA polymerase also exhibits 3' to 5' exonuclease activity. The beta chain is required for initiation of replication once it is clamped onto DNA, it slides freely (bidirectional and ATP-independent) along duplex DNA (By similarity). |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </div> | | </div> |
| | <div class="pdbe-citations 3p16" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 3p16" style="background-color:#fffaf0;"></div> |
| - | | |
| - | ==See Also== | |
| - | *[[DNA polymerase|DNA polymerase]] | |
| | == References == | | == References == |
| | <references/> | | <references/> |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: DNA-directed DNA polymerase]] | | [[Category: DNA-directed DNA polymerase]] |
| | + | [[Category: Large Structures]] |
| | [[Category: Myctu]] | | [[Category: Myctu]] |
| | [[Category: Bi, L J]] | | [[Category: Bi, L J]] |
| Structural highlights
3p16 is a 6 chain structure with sequence from Myctu. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Gene: | dnaN, Rv0002, MT0002, MTV029.02, MTCY10H4.0 (MYCTU) |
| Activity: | DNA-directed DNA polymerase, with EC number 2.7.7.7 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
[DPO3B_MYCTU] DNA polymerase III is a complex, multichain enzyme responsible for most of the replicative synthesis in bacteria. This DNA polymerase also exhibits 3' to 5' exonuclease activity. The beta chain is required for initiation of replication once it is clamped onto DNA, it slides freely (bidirectional and ATP-independent) along duplex DNA (By similarity).
Publication Abstract from PubMed
The sliding clamp is a key component of DNA polymerase III (Pol III) required for genome replication. It is known to function with diverse DNA repair proteins and cell cycle-control proteins, making it a potential drug target. To extend our understanding of the structure/function relationship of the sliding clamp, we solved the crystal structure of the sliding clamp from Mycobacterium tuberculosis (M. tuberculosis), a human pathogen that causes most cases of tuberculosis (TB). The sliding clamp from M. tuberculosis forms a ring-shaped head-to-tail dimer with three domains per subunit. Each domain contains two alpha helices in the inner ring that lie against two beta sheets in the outer ring. Previous studies have indicated that many Escherichia coli clamp-binding proteins have a conserved LF sequence, which is critical for binding to the hydrophobic region of the sliding clamp. Here, we analyzed the binding affinities of the M. tuberculosis sliding clamp and peptides derived from the alpha and delta subunits of Pol III, which indicated that the LF motif also plays an important role in the binding of the alpha and delta subunits to the sliding clamp of M. tuberculosis.
Crystal structure of DNA polymerase III beta sliding clamp from Mycobacterium tuberculosis.,Gui WJ, Lin SQ, Chen YY, Zhang XE, Bi LJ, Jiang T Biochem Biophys Res Commun. 2011 Feb 11;405(2):272-7. Epub 2011 Jan 8. PMID:21219854[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Gui WJ, Lin SQ, Chen YY, Zhang XE, Bi LJ, Jiang T. Crystal structure of DNA polymerase III beta sliding clamp from Mycobacterium tuberculosis. Biochem Biophys Res Commun. 2011 Feb 11;405(2):272-7. Epub 2011 Jan 8. PMID:21219854 doi:10.1016/j.bbrc.2011.01.027
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