Isolation of Drosophila cyclin D, a protein expressed in the morphogenetic furrow before entry into S phase.

Abstract:

:During Drosophila development, nuclear and cell divisions are coordinated in response to developmental signals. In yeast and mammalian cells, signals that control cell division regulate the activity of cyclin-dependent kinases (Cdks) through proteins such as cyclins that interact with the Cdks. Here we describe two Drosophila cyclins identified from a set of Cdk-interacting proteins. One, cyclin J, is of a distinctive sequence type; its exclusive maternal expression pattern suggests that it may regulate oogenesis or the early nuclear divisions of embryogenesis. The other belongs to the D class of cyclins, previously identified in mammalian cells. We show that Drosophila cyclin D is expressed in early embryos and in imaginal disc cells in a pattern that anticipates cell divisions. Expression in the developing eye disc at the anterior edge of the morphogenetic furrow suggests that cyclin D acts early, prior to cyclin E, in inducing G1-arrested cells to enter S phase. Our results also suggest that, although cyclin D may be necessary, its expression alone is not sufficient to initiate the events leading to S phase.

authors

Finley RL Jr,Thomas BJ,Zipursky SL,Brent R

doi

10.1073/pnas.93.7.3011

subject

Has Abstract

pub_date

1996-04-02 00:00:00

pages

3011-5

issue

7

eissn

0027-8424

issn

1091-6490

journal_volume

93

pub_type

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