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Human Asf1 and CAF‐1 interact and synergize in a repair‐coupled nucleosome assembly pathway
Author(s) -
Mello Jill A,
Silljé Herman H W,
Roche Danièle M J,
Kirschner Doris B,
Nigg Erich A,
Almouzni Geneviève
Publication year - 2002
Publication title -
embo reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.584
H-Index - 184
eISSN - 1469-3178
pISSN - 1469-221X
DOI - 10.1093/embo-reports/kvf068
Subject(s) - chromatin , nucleosome , microbiology and biotechnology , dna repair , histone , dna , nucleotide excision repair , biology , chaperone (clinical) , dna damage , saccharomyces cerevisiae , genetics , chemistry , gene , medicine , pathology
The efficient assembly of newly replicated and repaired DNA into chromatin is essential for proper genome function. Based on genetic studies in Saccharomyces cerevisiae , the histone chaperone anti‐silencing function 1 (Asf1) has been implicated in the DNA repair response. Here, the human homologs are shown to function synergistically with human CAF‐1 to assemble nucleosomes during nucleotide excision repair in vitro . Furthermore, we demonstrate that hAsf1 proteins can interact directly with the p60 subunit of hCAF‐1. In contrast to hCAF‐1 p60, the nuclear hAsf1 proteins are not significantly associated with chromatin in cells before or after the induction of DNA damage, nor specifically recruited to damaged DNA during repair in a bead‐linked DNA assay. A model is proposed in which the synergism between hAsf1 and CAF‐1 for nucleosome formation during DNA repair is achieved through a transient physical interaction allowing histone delivery from Asf1 to CAF‐1.