Mutagen Sensitivity and Suppression of Position-effect Variegation Result from Mutations in Mus209, the Drosophila Gene Encoding PCNA

Overview

Journal EMBO J

Specialties Biotechnology
Molecular Biology

Date 1994 Mar 15

PMID 7907981

Citations 43

Authors

D S Henderson

S S Banga

T A Grigliatti

J B Boyd

Affiliations

Soon will be listed here.

Abstract

The mus209B1 mutant of Drosophila melanogaster exhibits a complex pleiotropy of temperature-sensitive (ts) lethality, hypersensitivity to DNA-damaging agents such as ionizing radiation and methyl methanesulfonate, suppression of position-effect variegation (PEV), and female sterility. Our discovery that mus209 encodes proliferating cell nuclear antigen (PCNA), which is an indispensable component of the DNA replication apparatus, suggests that alterations to chromosome replication may underlie that pleiotropy. Nine lethal mutations, three of them ts, genetically define the Pcna locus. Temperature shift studies reveal that the vital function of PCNA is required throughout virtually all stages of fly development, and that maternally encoded PCNA is essential for embryogenesis. All three ts mutants strongly suppress PEV, which suggests a role for PCNA in chromatin assembly or modification.

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