Regulated nuclear entry of the C. elegans Pax-6 transcription factor

Yinhua Zhang, Henrique B. Ferreira, David Greenstein, Andrew Chisholm, Scott W. Emmons

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


It is shown that the C. elegans Pax-6 locus encodes two protein isoforms. One contains a Paired DNA binding domain as well as a homeodomain; the other consists only of the carboxy-terminal portion of the locus encoding the homeodomain. These two isoforms are expressed in a variety of postembryonic cell lineages. In one set of lineages, nuclear localization of a homeodomain-only form (MAB-18 isoform) appears to be under temporal and spatial control. Nuclear localization of MAlt-18 is correlated with the genetic requirement for mab-18 and with activation of a reporter gene driven by a mab-18 promoter. Reporter gene expression is dependent on mab-18 gene activity. It is hypothesized that a positive feedback loop is activated by regulated nuclear entry.

Original languageEnglish (US)
Pages (from-to)179-187
Number of pages9
JournalMechanisms of Development
Issue number1-2
StatePublished - 1998

Bibliographical note

Funding Information:
We thank members of the Emmons laboratory for their comments on the manuscript. This work was supported by grants from the NIH (GM39353) to S.W.E., the American Cancer Society (DB-149) to D.G., and the NIH (GM54657) to A.C. H.B.F. was a recipient of a Brazilian Research Council (CNPq) Postdoctoral Fellowship. D.G. is the recipient of a Junior Faculty Research Award of the American Cancer Society (JFRA-630). A.C. is an Alfred P. Sloan Research Fellow. S.W.E. is the Siegfried Ullmann Professor of Molecular Genetics.

Copyright 2007 Elsevier B.V., All rights reserved.


  • Caenorhabditis elegans
  • Homeodomain protein
  • Pax-6
  • mab-18
  • vab-3

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