DPB4/YDR121W Summary Help

Standard Name DPB4 1
Systematic Name YDR121W
Feature Type ORF, Verified
Description Subunit of DNA pol epsilon and of ISW2 chromatin accessibility complex; involved in both chromosomal DNA replication and inheritance of telomeric silencing; stabilizes the interaction of Pol epsilon with primer-template DNA, positively affecting the processivity of the polymerase and exonuclease activities of Pol epsilon; interacts with extranucleosomal DNA and acts as anchor point for ISW2 complex that retains its position on DNA during nucleosome mobilization (1, 2, 3, 4, 5, 6)
Name Description DNA Polymerase B (II) subunit
Chromosomal Location
ChrIV:693585 to 694175 | ORF Map | GBrowse
Gbrowse
Gene Ontology Annotations All DPB4 GO evidence and references
  View Computational GO annotations for DPB4
Molecular Function
Manually curated
Biological Process
Manually curated
Cellular Component
Manually curated
Classical genetics
null
Large-scale survey
null
Resources
190 total interaction(s) for 93 unique genes/features.
Physical Interactions
  • Affinity Capture-MS: 42
  • Affinity Capture-RNA: 1
  • Affinity Capture-Western: 13
  • Co-fractionation: 1
  • Co-purification: 4
  • Reconstituted Complex: 4
  • Two-hybrid: 5

Genetic Interactions
  • Dosage Rescue: 1
  • Negative Genetic: 65
  • Phenotypic Enhancement: 20
  • Phenotypic Suppression: 11
  • Positive Genetic: 6
  • Synthetic Growth Defect: 11
  • Synthetic Lethality: 4
  • Synthetic Rescue: 2

Resources
Expression Summary
histogram
Resources
Localization
Phosphorylation PhosphoGRID | PhosphoPep Database
Structure
Homologs
sequence information
ChrIV:693585 to 694175 | ORF Map | GBrowse
SGD ORF map
Last Update Coordinates: 2011-02-03 | Sequence: 1996-07-31
Subfeature details
Relative
Coordinates
Chromosomal
Coordinates
Most Recent Updates
Coordinates Sequence
CDS 1..591 693585..694175 2011-02-03 1996-07-31
Retrieve sequences
Analyze Sequence
S288C only
S288C vs. other species
S288C vs. other strains
Resources
External Links All Associated Seq | E.C. | Entrez Gene | Entrez RefSeq Protein | MIPS | Search all NCBI (Entrez) | UniProtKB
Primary SGDIDS000002528
References cited on this page View Complete Literature Guide for DPB4
1) Ohya T, et al.  (2000) Structure and function of the fourth subunit (Dpb4p) of DNA polymerase epsilon in Saccharomyces cerevisiae. Nucleic Acids Res 28(20):3846-52
2) Dua R, et al.  (2000) Subunit interactions within the Saccharomyces cerevisiae DNA polymerase epsilon (pol epsilon ) complex. Demonstration of a dimeric pol epsilon. J Biol Chem 275(37):28816-25
3) Li Y, et al.  (2000) Identification and cloning of two histone fold motif-containing subunits of HeLa DNA polymerase epsilon. J Biol Chem 275(30):23247-52
4) Iida T and Araki H  (2004) Noncompetitive counteractions of DNA polymerase epsilon and ISW2/yCHRAC for epigenetic inheritance of telomere position effect in Saccharomyces cerevisiae. Mol Cell Biol 24(1):217-27
5) Dang W, et al.  (2007) The Dpb4 Subunit of ISW2 Is Anchored to Extranucleosomal DNA. J Biol Chem 282(27):19418-25
6) Aksenova A, et al.  (2010) Mismatch Repair-Independent Increase in Spontaneous Mutagenesis in Yeast Lacking Non-Essential Subunits of DNA Polymerase epsilon. PLoS Genet 6(11):e1001209