The heterochronic gene lin-29 encodes a zinc finger protein that controls a terminal differentiation event in Caenorhabditis elegans

A. E. Rougvie, V. Ambros

Research output: Contribution to journalArticlepeer-review

104 Scopus citations

Abstract

A hierarchy of heterochronic genes, lin-4, lin-14, lin-28 and lin-29, temporally restricts terminal differentiation of Caenorhabditis elegans hypodermal seam cells to the final molt. This terminal differentiation event involves cell cycle exit, cell fusion and the differential regulation of genes expressed in the larval versus adult hypodermis. lin-29 is the most downstream gene in the developmental timing pathway and thus it is the most direct known regulator of these diverse processes. We show that lin-29 encodes a protein with five zinc fingers of the (Cys)2-(His)2 class and thus likely controls these processes by regulating transcription in a stage-specific manner. Consistent with this role, a lin-29 fusion protein binds in vitro to the 5' regulatory sequences necessary in vivo for expression of col-19, a collagen gene expressed in the adult hypodermis. lin-29 mRNA is detected in the first larval stage and increases in abundance through subsequent larval stages until the final molt, when lin-29 activity is required for terminal differentiation.

Original languageEnglish (US)
Pages (from-to)2491-2500
Number of pages10
JournalDevelopment
Volume121
Issue number8
StatePublished - 1995

Keywords

  • Caenorhabditis elegans
  • Heterochronic gene
  • Terminal differentiation
  • Transcription
  • Zinc finger
  • lin-29

Fingerprint Dive into the research topics of 'The heterochronic gene lin-29 encodes a zinc finger protein that controls a terminal differentiation event in Caenorhabditis elegans'. Together they form a unique fingerprint.

Cite this