Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
Human DNA topoisomerases II alpha and II beta can functionally substitute for yeast TOP2 in chromosome segregation and recombination. / Jensen, S; Redwood, C S; Jenkins, J R; Andersen, A H; Hickson, I D.
In: Molecular Genetics and Genomics, Vol. 252, No. 1-2, 27.08.1996, p. 79-86.Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
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TY - JOUR
T1 - Human DNA topoisomerases II alpha and II beta can functionally substitute for yeast TOP2 in chromosome segregation and recombination
AU - Jensen, S
AU - Redwood, C S
AU - Jenkins, J R
AU - Andersen, A H
AU - Hickson, I D
PY - 1996/8/27
Y1 - 1996/8/27
N2 - The ability of the human DNA topoisomerase II alpha and II beta isozymes to complement functional defects conferred by conditional top2 mutations in Saccharomyces cerevisiae has been investigated. At the restrictive temperature, top2 strains show multiple abnormalities, including an inability to complete mitotic and meiotic division owing to a defect in chromosome segregation, and hyper-recombination within the repetitive rDNA gene cluster. We show that the human topoisomerases II alpha and II beta can each support both vegetative growth and the production of viable spores in a top2-4 mutant at the restrictive temperature. Similarly, both human isozymes can rescue a strain carrying a top2 gene disruption, and suppress hyper-recombination within the rDNA gene cluster. We conclude that the human topoisomerase II alpha and II beta isozymes are functionally interchangeable with yeast topoisomerase II and suggest that any isozyme-specific roles in human cells are likely to be dependent upon factors other than inherent differences in catalytic ability between the alpha and beta isozymes.
AB - The ability of the human DNA topoisomerase II alpha and II beta isozymes to complement functional defects conferred by conditional top2 mutations in Saccharomyces cerevisiae has been investigated. At the restrictive temperature, top2 strains show multiple abnormalities, including an inability to complete mitotic and meiotic division owing to a defect in chromosome segregation, and hyper-recombination within the repetitive rDNA gene cluster. We show that the human topoisomerases II alpha and II beta can each support both vegetative growth and the production of viable spores in a top2-4 mutant at the restrictive temperature. Similarly, both human isozymes can rescue a strain carrying a top2 gene disruption, and suppress hyper-recombination within the rDNA gene cluster. We conclude that the human topoisomerase II alpha and II beta isozymes are functionally interchangeable with yeast topoisomerase II and suggest that any isozyme-specific roles in human cells are likely to be dependent upon factors other than inherent differences in catalytic ability between the alpha and beta isozymes.
KW - Antigens, Neoplasm
KW - DNA Topoisomerases, Type II
KW - DNA-Binding Proteins
KW - Gene Expression
KW - Genetic Complementation Test
KW - Humans
KW - Isoenzymes
KW - Meiosis
KW - Mutation
KW - Recombination, Genetic
KW - Saccharomyces cerevisiae
KW - Spores, Fungal
KW - Temperature
KW - Transformation, Genetic
KW - Journal Article
KW - Research Support, Non-U.S. Gov't
M3 - Journal article
C2 - 8804406
VL - 252
SP - 79
EP - 86
JO - Molecular Genetics and Genomics
JF - Molecular Genetics and Genomics
SN - 1617-4615
IS - 1-2
ER -