Genetics, Vol 139, 1701-1709, Copyright © 1995

INVESTIGATIONS

A Genetic Analysis of the 63E-64A Genomic Region of Drosophila melanogaster: Identification of Mutations in a Replication Factor C Subunit

S. D. Harrison, N. Solomon and G. M. Rubin
Howard Hughes Medical Institute and Department of Molecular and Cellular Biology, University of California, Berkeley, California 94720-3200

We have performed and F(2) genetic screen to identify lethal mutations within the 63E-64A genomic region. We have isolated 122 mutations in 20 different complementation groups. Of these groups, 16 are represented by multiple alleles. We have also established that the Rop and Ras2 genes are located within the 63E-64A genomic domain at 64A10,11. We have sequenced 10.2 kb of DNA surrounding this gene pair and find that in addition to Rop and Ras2 there is another gene located within this DNA sequence. The gene product, which we have named Rfc40, shows 68% identity to the 40-kDa subunit of replication factor C. We find that the members of one complementation group (13 alleles) derived from our screen correspond to mutations in the Rop gene, whereas the members of another (five alleles) correspond to mutations in the Rfc40 gene. In addition we have isolated 11 new mutant alleles of the disembodied gene.

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