1tva
From Proteopedia
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|PDB= 1tva |SIZE=350|CAPTION= <scene name='initialview01'>1tva</scene>, resolution 2.60Å | |PDB= 1tva |SIZE=350|CAPTION= <scene name='initialview01'>1tva</scene>, resolution 2.60Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand= | + | |LIGAND= <scene name='pdbligand=DA:2'-DEOXYADENOSINE-5'-MONOPHOSPHATE'>DA</scene>, <scene name='pdbligand=DC:2'-DEOXYCYTIDINE-5'-MONOPHOSPHATE'>DC</scene>, <scene name='pdbligand=DG:2'-DEOXYGUANOSINE-5'-MONOPHOSPHATE'>DG</scene>, <scene name='pdbligand=DT:THYMIDINE-5'-MONOPHOSPHATE'>DT</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene> |
| - | |ACTIVITY= [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] | + | |ACTIVITY= <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> |
|GENE= POLB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | |GENE= POLB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1bpz|1BPZ]], [[1tv9|1TV9]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1tva FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tva OCA], [http://www.ebi.ac.uk/pdbsum/1tva PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1tva RCSB]</span> | ||
}} | }} | ||
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[[Category: Krahn, J M.]] | [[Category: Krahn, J M.]] | ||
[[Category: Wilson, S H.]] | [[Category: Wilson, S H.]] | ||
| - | [[Category: MG]] | ||
| - | [[Category: NA]] | ||
| - | [[Category: PO4]] | ||
[[Category: base excision repair]] | [[Category: base excision repair]] | ||
[[Category: dna mismatch]] | [[Category: dna mismatch]] | ||
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[[Category: nucleotidyltransferase]] | [[Category: nucleotidyltransferase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 00:01:38 2008'' |
Revision as of 21:01, 30 March 2008
| |||||||
| , resolution 2.60Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , , , , , | ||||||
| Gene: | POLB (Homo sapiens) | ||||||
| Activity: | DNA-directed DNA polymerase, with EC number 2.7.7.7 | ||||||
| Related: | 1BPZ, 1TV9
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
HUMAN DNA POLYMERASE BETA COMPLEXED WITH NICKED DNA CONTAINING A MISMATCHED TEMPLATE THYMIDINE AND INCOMING CYTIDINE
Overview
DNA polymerases generally select the correct nucleotide from a pool of structurally similar molecules to preserve Watson-Crick base-pairing rules. We report the structure of DNA polymerase beta with DNA mismatches situated in the polymerase active site. This was achieved by using nicked product DNA that traps the mispair (template-primer, A-C or T-C) in the nascent base pair binding pocket. The structure of each mispair complex indicates that the bases do not form hydrogen bonds with one another, but form a staggered arrangement where the bases of the mispair partially overlap. This prevents closure/opening of the N subdomain that is believed to be required for catalytic cycling. The partially open conformation of the N subdomain results in distinct hydrogen bonding networks that are unique for each mispair. These structures define diverse molecular aspects of misinsertion that are consistent with the induced-fit model for substrate specificity.
About this Structure
1TVA is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Structural insights into DNA polymerase beta deterrents for misincorporation support an induced-fit mechanism for fidelity., Krahn JM, Beard WA, Wilson SH, Structure. 2004 Oct;12(10):1823-32. PMID:15458631
Page seeded by OCA on Mon Mar 31 00:01:38 2008
