Pol kappa: A DNA polymerase required for sister chromatid cohesion.
Establishment of cohesion between sister chromatids is coupled to replication fork passage through an unknown mechanism. Here we report that TRF4, an evolutionarily conserved gene necessary for chromosome segregation, encodes a DNA polymerase with beta-polymerase-like properties. A double mutant in the redundant homologs, TRF4 and TRF5, is unable to complete S phase, whereas a trf4 single mutant completes a presumably defective S phase that results in a failure of cohesion between the replicated sister chromatids. This suggests that TRFs are a key link in the coordination between DNA replication and sister chromatid cohesion. Trf4 and Trf5 represent the fourth class of essential nuclear DNA polymerases (designated DNA polymerase kappa) in Saccharomyces cerevisiae and probably in all eukaryotes.
Department of Microbiology, University of Virginia, Box 441, Jordan Hall, 1300 Jefferson Park Avenue, Charlottesville, VA 22908, USA.
Z
Z
Wang
I B
IB
Castaño
A
A
De Las Peñas
C
C
Adams
M F
MF
Christman
D002842:Chromatids / Q000378:metabolism*; D002868:Chromosomal Proteins, Non-Histone / Q000235:genetics / Q000378:metabolism*; D017931:DNA Primers / Q000378:metabolism; D004261:DNA Replication; D004259:DNA-Directed DNA Polymerase / Q000235:genetics / Q000378:metabolism*; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005656:Fungal Proteins / Q000235:genetics / Q000378:metabolism; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D016297:Mutagenesis, Site-Directed; D009154:Mutation; D009687:Nuclear Proteins; D019384:Nucleic Acid Synthesis Inhibitors; D009838:Oligodeoxyribonucleotides / Q000378:metabolism; D011994:Recombinant Proteins / Q000378:metabolism; D016196:S Phase; D012441:Saccharomyces cerevisiae / Q000201:enzymology; D029701:Saccharomyces cerevisiae Proteins; D013698:Templates, Genetic
D002868:Chromosomal Proteins, Non-Histone; D017931:DNA Primers; D004791:Enzyme Inhibitors; D005656:Fungal Proteins; D009687:Nuclear Proteins; D019384:Nucleic Acid Synthesis Inhibitors; D009838:Oligodeoxyribonucleotides; D011994:Recombinant Proteins; D029701:Saccharomyces cerevisiae Proteins; D004259:DNA-Directed DNA Polymerase; C487545:PAP2 protein, S cerevisiae; C118146:TENT4A protein, human