Premium
Temporary complementation of temperature‐sensitive mutants of the cell cycle by transfection with a wild‐type or a mutant cDNA of ADP/ATP translocase
Author(s) -
Alder Hansjuerg,
Chang ChungDer,
Chen SingTsung,
Beck Ingrid,
Chang ChenYeh,
Baserga Renato
Publication year - 1989
Publication title -
journal of cellular physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.529
H-Index - 174
eISSN - 1097-4652
pISSN - 0021-9541
DOI - 10.1002/jcp.1041410114
Subject(s) - mutant , complementation , biology , complementary dna , microbiology and biotechnology , transfection , translocase , clone (java method) , cell fusion , mutation , gene , cell , biochemistry , chromosomal translocation
A number of cell‐cycle‐specific temperature‐sensitive (ts) mutants have been isolated from animal cells, especially Syrian hamster cells. These ts mutants, like cell cycle ts mutants of yeast, can be complemented by specific genes, some of which have been molecularly cloned. We have isolated a cDNA clone that complements TK − ts13 cells, but only temporarily. This clone, called B1, differs from a previously isolated clone (Sekiguchi et al.: EMBO Journal 7 : 1683–1687, 1988) that specifically complements ts13 cells. In addition, B1 also complemented temporarily three other ts mutants of the cell cycle, tsAF8, ts694, and ts550C cells. These mutants have different mutations since, in cell fusion experiments, they complement each other. Sequencing of the B1 cDNA clone revealed that it was a mutant of human ADP/ATP translocase in which some human sequences at the 5′ end have been replaced by SV40 sequences. The wild‐type translocase was less effective but could still increase the survival time of cell cycle ts mutants at the restrictive temperature. Using the polymerase chain reaction, it was possible to demonstrate that the B1 plasmid is expressed in TK − ts13 cells undergoing temporary complementation.