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1ryr
From Proteopedia
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| - | [[Image:1ryr.gif|left|200px]] | + | [[Image:1ryr.gif|left|200px]] |
| - | + | ||
| - | '''REPLICATION OF A CIS-SYN THYMINE DIMER AT ATOMIC RESOLUTION''' | + | {{Structure |
| + | |PDB= 1ryr |SIZE=350|CAPTION= <scene name='initialview01'>1ryr</scene>, resolution 2.28Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene> and <scene name='pdbligand=ATP:ADENOSINE-5'-TRIPHOSPHATE'>ATP</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] | ||
| + | |GENE= DPO4 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2287 Sulfolobus solfataricus]) | ||
| + | }} | ||
| + | |||
| + | '''REPLICATION OF A CIS-SYN THYMINE DIMER AT ATOMIC RESOLUTION''' | ||
| + | |||
==Overview== | ==Overview== | ||
| Line 7: | Line 16: | ||
==About this Structure== | ==About this Structure== | ||
| - | 1RYR is a [ | + | 1RYR is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Sulfolobus_solfataricus Sulfolobus solfataricus]. This structure supersedes the now removed PDB entry 1PM0. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RYR OCA]. |
==Reference== | ==Reference== | ||
| - | Replication of a cis-syn thymine dimer at atomic resolution., Ling H, Boudsocq F, Plosky BS, Woodgate R, Yang W, Nature. 2003 Aug 28;424(6952):1083-7. Epub 2003 Aug 6. PMID:[http:// | + | Replication of a cis-syn thymine dimer at atomic resolution., Ling H, Boudsocq F, Plosky BS, Woodgate R, Yang W, Nature. 2003 Aug 28;424(6952):1083-7. Epub 2003 Aug 6. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12904819 12904819] |
[[Category: DNA-directed DNA polymerase]] | [[Category: DNA-directed DNA polymerase]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
| Line 25: | Line 34: | ||
[[Category: tt-dimer]] | [[Category: tt-dimer]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 13:58:04 2008'' |
Revision as of 11:58, 20 March 2008
| |||||||
| , resolution 2.28Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | and | ||||||
| Gene: | DPO4 (Sulfolobus solfataricus) | ||||||
| Activity: | DNA-directed DNA polymerase, with EC number 2.7.7.7 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
REPLICATION OF A CIS-SYN THYMINE DIMER AT ATOMIC RESOLUTION
Overview
Ultraviolet light damages DNA by catalysing covalent bond formation between adjacent pyrimidines, generating cis-syn cyclobutane pyrimidine dimers (CPDs) as the most common lesion. CPDs block DNA replication by high-fidelity DNA polymerases, but they can be efficiently bypassed by the Y-family DNA polymerase pol eta. Mutations in POLH encoding pol eta are implicated in nearly 20% of xeroderma pigmentosum, a human disease characterized by extreme sensitivity to sunlight and predisposition to skin cancer. Here we have determined two crystal structures of Dpo4, an archaeal pol eta homologue, complexed with CPD-containing DNA, where the 3' and 5' thymine of the CPD separately serves as a templating base. The 3' thymine of the CPD forms a Watson-Crick base pair with the incoming dideoxyATP, but the 5' thymine forms a Hoogsteen base pair with the dideoxyATP in syn conformation. Dpo4 retains a similar tertiary structure, but each unusual DNA structure is individually fitted into the active site for catalysis. A model of the pol eta-CPD complex built from the crystal structures of Saccharomyces cerevisiae apo-pol eta and the Dpo4-CPD complex suggests unique features that allow pol eta to efficiently bypass CPDs.
About this Structure
1RYR is a Single protein structure of sequence from Sulfolobus solfataricus. This structure supersedes the now removed PDB entry 1PM0. Full crystallographic information is available from OCA.
Reference
Replication of a cis-syn thymine dimer at atomic resolution., Ling H, Boudsocq F, Plosky BS, Woodgate R, Yang W, Nature. 2003 Aug 28;424(6952):1083-7. Epub 2003 Aug 6. PMID:12904819
Page seeded by OCA on Thu Mar 20 13:58:04 2008
