TEL1, an S. cerevisiae homolog of the human gene mutated in ataxia telangiectasia, is functionally related to the yeast checkpoint gene MEC1

Dwight M. Morrow*, Danilo A. Tagle, Yosef Shiloh, Francis S. Collins, Philip Hieter

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Patients with the genetic disorder ataxia telangiectasia (AT) have mutations in the AT mutated (ATM) gene, which is homologous to TELI and the checkpoint gene MEC1. A tel1 deletion mutant, unlike a mec1 deletion, is viable and does not exhibit increased sensitivity to DNA-damaging agents. However, increased dosage of TEL1 rescues sensitivity of a mec1 mutant, mec1-1, to DNA-damaging agents and rescues viability of a mec1 disruption. mecl-1 tel1Δl double mutants are synergistically sensitive to DNA-damaging agents, including radiomimetic drugs. These data indicate that TEL l and MEC1 are functionally related and that functions of the ATM gene are apparently divided between at least two S. cerevisiae homologs.

Original languageEnglish
Pages (from-to)831-840
Number of pages10
JournalCell
Volume82
Issue number5
DOIs
StatePublished - 8 Sep 1995

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