Abstract
ABSTRACT In C. elegans, germline mitosis depends on induction by the somatic distal tip cell (DTC) and on activity of the glp-1 gene. Using antibodies to GLP-1 protein, we have examined GLP-1 on western blots and by immunocytochemistry. GLP-1 is tightly associated with membranes of mitotic germline cells, supporting its identification as an integral membrane protein. Furthermore, GLP-1 is localized within the germ line to the mitotic region, consistent with the model that GLP-1 acts as a membrane receptor for the distal tip cell signal. Unexpectedly, GLP-1 and the zone of mitosis extend further than the DTC processes. We present three models by which the DTC may influence GLP-1 activity and thereby determine the zone of mitosis. The spatial restriction of GLP-1 appears to be controlled at the translational level in hermaphrodites. We suggest that down-regulation of GLP-1 may be required to effect the transition from mitosis into meiosis.
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Dates
Type | When |
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Created | 4 years, 4 months ago (April 25, 2021, 9:32 p.m.) |
Deposited | 8 months, 1 week ago (Dec. 17, 2024, 6:42 p.m.) |
Indexed | 6 days, 17 hours ago (Aug. 19, 2025, 5:56 a.m.) |
Issued | 30 years, 10 months ago (Oct. 1, 1994) |
Published | 30 years, 10 months ago (Oct. 1, 1994) |
Published Online | 30 years, 10 months ago (Oct. 1, 1994) |
Published Print | 30 years, 10 months ago (Oct. 1, 1994) |