Genetic interaction of DED1 encoding a putative ATP-dependent RNA helicase with SRM1 encoding a mammalian RCC1 homolog in Saccharomyces cerevisiae.
The Saccharomyces cerevisiae temperature-sensitive mutants srm1-1, mtr1-2 and prp20-1 carry alleles of a gene encoding a homolog of mammalian RCC1. In order to identify a protein interacting with RCC1, a series of suppressors of the srm1-1 mutation were isolated as cold-sensitive mutants and one of the mutants, designated ded1-21, was found to be defective in the DED1 gene. The double mutant, srm1-1 ded1-21, could grow at 35 degrees C, but not at 37 degrees C. A revertant of srm1-1 ded1-21 that became able to grow at 37 degrees C acquired another mutation in the SRM1 gene, indicating the tight relationship between SRM1 and DED1. In all the rcc1- strains examined, the amount of mutated SRM1 proteins was reduced or not detectable at the nonpermissive temperature. While mutated SRM1 protein was stabilized in all of the rcc1- strains by the ded1-21 mutation, the ded1-21 mutation suppressed both srm1-1 and mtr1-2, but not the prp20-1 mutation, contrary to the previous finding that overproduction of the S. cerevisiae Ran homolog GSP1 suppresses prp20-1, but not srm1-1 or mtr1-2.
Hayashi
N
N
Department of Molecular Biology, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan.
Seino
H
H
Irie
K
K
Watanabe
M
M
Clark
K L
KL
Matsumoto
K
K
Nishimoto
T
T
D018797:Cell Cycle Proteins; D003001:Cloning, Molecular; D004268:DNA-Binding Proteins / Q000235:genetics* / Q000378:metabolism; D005656:Fungal Proteins / Q000235:genetics* / Q000378:metabolism; D005800:Genes, Fungal; D005808:Genes, Recessive; D016153:Genes, Suppressor; D020662:Guanine Nucleotide Exchange Factors; D009154:Mutation; D009687:Nuclear Proteins / Q000235:genetics* / Q000378:metabolism; D010641:Phenotype; D020365:RNA Helicases; D012316:RNA Nucleotidyltransferases / Q000235:genetics* / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000201:enzymology / Q000235:genetics* / Q000254:growth & development; D029701:Saccharomyces cerevisiae Proteins; D013696:Temperature
D018797:Cell Cycle Proteins; D004268:DNA-Binding Proteins; D005656:Fungal Proteins; D020662:Guanine Nucleotide Exchange Factors; D009687:Nuclear Proteins; C067050:SRM1 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins; D012316:RNA Nucleotidyltransferases; D020365:RNA Helicases