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PROGRESS REPORT ON TWO GENES THAT INTERACT WITH LIN-12: SEL-9 AND SUP-17by: Wen C-H, I. S. Greenwald
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AbstractTwo sel-9 mutations were originally isolated as suppressors of a lin-12 hypomorphic allele (Sundaram and Greenwald, 1993), and we have isolated 6 additional alleles of sel-9 by a noncomplementation screen. We have examined the genetic interactions between sel-9 and lin-12 alleles. None of the alleles of sel-9 behave like sDf47, a deficiency of the locus(Hunter and Wood, 1992). These results indicate either that none of the sel-9 alleles are null alleles, or that the deficiency does not behave like a null allele (perhaps because it reduces the activity of another interacting gene). The complex genetics have made sel-9 difficult to clone, and we will present the status of our efforts at the meeting. sup-17 was identified by suppressors of lin-12(d) alleles (Ferguson and Horvitz, 1985; F. Tax, J. Thomas, E. Ferguson and H.R. Horvitz, 1997). We have been investigating interactions of sup-17 with lin-12 and glp-1 hypomorphs, and with other genes that interact with lin-12. We have also begun to try to isolate sup-17, beginning with a 180kb YAC clone that Mark Metzstein (personal communication) used to rescue sup-17 in the process of correlating the genetic and physical maps in the ces-1 region. We have used in vivo recombination in yeast to truncate this YAC clone, and have identified a 60 kb region that is able to rescue sup-17. We hope to have made additional progress towards cloning sup-17 by the meeting.
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