4id3: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
[[ | ==Crystal Structure of the BRCT domain of S. Cerevisiae Rev1== | ||
<StructureSection load='4id3' size='340' side='right' caption='[[4id3]], [[Resolution|resolution]] 1.97Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[4id3]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_s288c Saccharomyces cerevisiae s288c]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ID3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4ID3 FirstGlance]. <br> | |||
</td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">REV1, YOR346W, O6339 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Saccharomyces cerevisiae S288c])</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=4id3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4id3 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4id3 RCSB], [http://www.ebi.ac.uk/pdbsum/4id3 PDBsum]</span></td></tr> | |||
</table> | |||
== Function == | |||
[[http://www.uniprot.org/uniprot/REV1_YEAST REV1_YEAST]] Deoxycytidyl transferase involved in DNA repair. Transfers a dCMP residue from dCTP to the 3'-end of a DNA primer in a template-dependent reaction. May assist in the first step in the bypass of abasic lesions by the insertion of a nucleotide opposite the lesion. Required for normal induction of mutations by physical and chemical agents. Involved in mitochondrial DNA mutagenesis.<ref>PMID:8751446</ref> <ref>PMID:11316789</ref> <ref>PMID:16452144</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Translesion synthesis (TLS) is a pathway in which specialized, low-fidelity DNA polymerases are used to overcome replication blocks caused by DNA damage. The use of this pathway often results in somatic mutations that can drive carcinogenesis. Rev1 is a TLS polymerase found in all eukaryotes that plays a pivotal role in mediating DNA damage-induced mutagenesis. It possesses a BRCA1 C-terminal (BRCT) domain that is required for its function. The rev1-1 allele encodes a mutant form of Rev1 with a G193R substitution in this domain, which reduces the level of DNA damage-induced mutagenesis. Despite its clear importance in mutagenic TLS, the role of the BRCT domain is unknown. Here, we report the X-ray crystal structure of the yeast Rev1 BRCT domain and show that substitutions in residues constituting its phosphate-binding pocket do not affect mutagenic TLS. This suggests that the role of the Rev1 BRCT domain is not to recognize phosphate groups on protein binding partners or on DNA. We also found that residue G193 is located in a conserved turn region of the BRCT domain, and our in vivo and in vitro studies suggest that the G193R substitution may disrupt Rev1 function by destabilizing the fold of the BRCT domain. | |||
Structure and Functional Analysis of the BRCT Domain of Translesion Synthesis DNA Polymerase Rev1.,Pryor JM, Gakhar L, Washington MT Biochemistry. 2012 Dec 20. PMID:23240687<ref>PMID:23240687</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
== References == | |||
<references/> | |||
== | __TOC__ | ||
</StructureSection> | |||
[[Category: Saccharomyces cerevisiae s288c]] | [[Category: Saccharomyces cerevisiae s288c]] | ||
[[Category: Gakhar, L]] | [[Category: Gakhar, L]] | ||
[[Category: Pryor, J M | [[Category: Pryor, J M]] | ||
[[Category: Washington, M T | [[Category: Washington, M T]] | ||
[[Category: Brct domain]] | [[Category: Brct domain]] | ||
[[Category: Protein binding]] | [[Category: Protein binding]] | ||
Revision as of 01:26, 26 December 2014
Crystal Structure of the BRCT domain of S. Cerevisiae Rev1Crystal Structure of the BRCT domain of S. Cerevisiae Rev1
Structural highlights
Function[REV1_YEAST] Deoxycytidyl transferase involved in DNA repair. Transfers a dCMP residue from dCTP to the 3'-end of a DNA primer in a template-dependent reaction. May assist in the first step in the bypass of abasic lesions by the insertion of a nucleotide opposite the lesion. Required for normal induction of mutations by physical and chemical agents. Involved in mitochondrial DNA mutagenesis.[1] [2] [3] Publication Abstract from PubMedTranslesion synthesis (TLS) is a pathway in which specialized, low-fidelity DNA polymerases are used to overcome replication blocks caused by DNA damage. The use of this pathway often results in somatic mutations that can drive carcinogenesis. Rev1 is a TLS polymerase found in all eukaryotes that plays a pivotal role in mediating DNA damage-induced mutagenesis. It possesses a BRCA1 C-terminal (BRCT) domain that is required for its function. The rev1-1 allele encodes a mutant form of Rev1 with a G193R substitution in this domain, which reduces the level of DNA damage-induced mutagenesis. Despite its clear importance in mutagenic TLS, the role of the BRCT domain is unknown. Here, we report the X-ray crystal structure of the yeast Rev1 BRCT domain and show that substitutions in residues constituting its phosphate-binding pocket do not affect mutagenic TLS. This suggests that the role of the Rev1 BRCT domain is not to recognize phosphate groups on protein binding partners or on DNA. We also found that residue G193 is located in a conserved turn region of the BRCT domain, and our in vivo and in vitro studies suggest that the G193R substitution may disrupt Rev1 function by destabilizing the fold of the BRCT domain. Structure and Functional Analysis of the BRCT Domain of Translesion Synthesis DNA Polymerase Rev1.,Pryor JM, Gakhar L, Washington MT Biochemistry. 2012 Dec 20. PMID:23240687[4] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
|
| ||||||||||||||||