Abstract
division abnormally delayed (dally) encodes an integral membrane proteoglycan of the glypican family that affects a number of patterning events during both embryonic and larval development. Earlier studies demonstrated that Dally regulates cellular responses to Wingless (Wg) and Decapentaplegic (Dpp) in a tissue-specific manner, consistent with its proposed role as a growth factor co-receptor. dally mutants also display cell cycle progression defects in specific sets of dividing cells in the developing optic lobe and retina. The affected cells in the retina and lamina show delays in completion of the G2-M segment of the cell cycle. We have investigated the molecular basis of dally-mediated cell division defects by examining the genetic interactions between dally and known cell cycle regulators. Reductions in cyclin A but not cyclin B or string expression, suppress dally cell division defects in the optic lobe. cycA mutations also dominantly rescue many dally adult morphological defects including lethality, phenotypes that are unaffected by reducing cycB function. dally mutants show abnormal Cyclin A expression in the dividing cells affected, with appreciable levels of Cyclin A remaining in late prophase and metaphase, stages where Cyclin A is normally absent. Given that Dally is known to regulate the activity of secreted growth factors our findings suggest that extracellular cues influence the degradation of Cyclin A in a manner that controls cell cycle progression and ultimately, cell division patterning.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 123-130 |
| Number of pages | 8 |
| Journal | Journal of Cell Science |
| Volume | 115 |
| Issue number | 1 |
| State | Published - Feb 9 2002 |
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All Science Journal Classification (ASJC) codes
- Cell Biology
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dally, a Drosophila member of the glypican family of integral membrane proteoglycans, affects cell cycle progression and morphogenesis via a cyclin A-mediated process. / Nakato, Hiroshi; Fox, Bethany; Selleck, Scott Brian.
In: Journal of Cell Science, Vol. 115, No. 1, 09.02.2002, p. 123-130.Research output: Contribution to journal › Article
TY - JOUR
T1 - dally, a Drosophila member of the glypican family of integral membrane proteoglycans, affects cell cycle progression and morphogenesis via a cyclin A-mediated process
AU - Nakato, Hiroshi
AU - Fox, Bethany
AU - Selleck, Scott Brian
PY - 2002/2/9
Y1 - 2002/2/9
N2 - division abnormally delayed (dally) encodes an integral membrane proteoglycan of the glypican family that affects a number of patterning events during both embryonic and larval development. Earlier studies demonstrated that Dally regulates cellular responses to Wingless (Wg) and Decapentaplegic (Dpp) in a tissue-specific manner, consistent with its proposed role as a growth factor co-receptor. dally mutants also display cell cycle progression defects in specific sets of dividing cells in the developing optic lobe and retina. The affected cells in the retina and lamina show delays in completion of the G2-M segment of the cell cycle. We have investigated the molecular basis of dally-mediated cell division defects by examining the genetic interactions between dally and known cell cycle regulators. Reductions in cyclin A but not cyclin B or string expression, suppress dally cell division defects in the optic lobe. cycA mutations also dominantly rescue many dally adult morphological defects including lethality, phenotypes that are unaffected by reducing cycB function. dally mutants show abnormal Cyclin A expression in the dividing cells affected, with appreciable levels of Cyclin A remaining in late prophase and metaphase, stages where Cyclin A is normally absent. Given that Dally is known to regulate the activity of secreted growth factors our findings suggest that extracellular cues influence the degradation of Cyclin A in a manner that controls cell cycle progression and ultimately, cell division patterning.
AB - division abnormally delayed (dally) encodes an integral membrane proteoglycan of the glypican family that affects a number of patterning events during both embryonic and larval development. Earlier studies demonstrated that Dally regulates cellular responses to Wingless (Wg) and Decapentaplegic (Dpp) in a tissue-specific manner, consistent with its proposed role as a growth factor co-receptor. dally mutants also display cell cycle progression defects in specific sets of dividing cells in the developing optic lobe and retina. The affected cells in the retina and lamina show delays in completion of the G2-M segment of the cell cycle. We have investigated the molecular basis of dally-mediated cell division defects by examining the genetic interactions between dally and known cell cycle regulators. Reductions in cyclin A but not cyclin B or string expression, suppress dally cell division defects in the optic lobe. cycA mutations also dominantly rescue many dally adult morphological defects including lethality, phenotypes that are unaffected by reducing cycB function. dally mutants show abnormal Cyclin A expression in the dividing cells affected, with appreciable levels of Cyclin A remaining in late prophase and metaphase, stages where Cyclin A is normally absent. Given that Dally is known to regulate the activity of secreted growth factors our findings suggest that extracellular cues influence the degradation of Cyclin A in a manner that controls cell cycle progression and ultimately, cell division patterning.
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M3 - Article
VL - 115
SP - 123
EP - 130
JO - Journal of Cell Science
JF - Journal of Cell Science
SN - 0021-9533
IS - 1
ER -