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Genetic Evidence for Functional Interactions Between Actin Noncomplementing (Anc) Gene Products and Actin Cytoskeletal Proteins in Saccharomyces cerevisiae

Genetic Evidence for Functional Interactions Between Actin Noncomplementing (Anc) Gene Products and Actin Cytoskeletal Proteins in Saccharomyces cerevisiae DBN. Vinh, M. D. Welch, A. K. Corsi, K. F. Wertman and D. G. Drubin Department of Molecular and Cell Biology, University of California, Berkeley, California 94720 We describe here genetic interactions between mutant alleles of Actin-NonComplementing (ANC) genes and actin (ACT1) or actin-binding protein (SAC6, ABP1, TPM1) genes. The anc mutations were found to exhibit allele-specific noncomplementing interactions with different act1 mutations. In addition, mutant alleles of four ANC genes (ANC1, ANC2, ANC3 and ANC4) were tested for interactions with null alleles of actin-binding protein genes. An anc1 mutant allele failed to complement null alleles of the SAC6 and TPM1 genes that encode yeast fimbrin and tropomyosin, respectively. Also, synthetic lethality between anc3 and sac6 mutations, and between anc4 and tpm1 mutations was observed. Taken together, the above results strongly suggest that the ANC gene products contribute to diverse aspects of actin function. Finally, we report the results of tests of two models previously proposed to explain extragenic noncomplementation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Genetics Genetics Society of America

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