Purification and characterization of CAF-I, a human cell factor required for chromatin assembly during DNA replication in vitro - PubMed (original) (raw)
Purification and characterization of CAF-I, a human cell factor required for chromatin assembly during DNA replication in vitro
S Smith et al. Cell. 1989.
Abstract
The purification and characterization of a replication-dependent chromatin assembly factor (CAF-I) from the nuclei of human cells is described. CAF-I is a multisubunit protein that, when added to a crude cytosol replication extract, promotes chromatin assembly on replicating SV40 DNA. Chromatin assembly by CAF-I requires and is coupled with DNA replication. The minichromosomes assembled de novo by CAF-I consist of correctly spaced nucleosomes containing the four core histones H2A, H2B, H3, and H4, which are supplied in a soluble form by the cytosol replication extract. Thus, by several criteria, the CAF-I-dependent chromatin assembly reaction described herein reflects the process of chromatin formation during DNA replication in vivo.
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