A PP2A regulatory subunit positively regulates Ras-mediated signaling during Caenorhabditis elegans vulval induction.

Abstract:

:We describe evidence that a regulatory B subunit of protein phosphatase 2A (PP2A) positively regulates an RTK-Ras-MAP kinase signaling cascade during Caenorhabditis elegans vulval induction. Although reduction of sur-6 PP2A-B function causes few vulval induction defects in an otherwise wild-type background, sur-6 PP2A-B mutations suppress the Multivulva phenotype of an activated ras mutation and enhance the Vulvaless phenotype of mutations in lin-45 raf, sur-8, or mpk-1. Double mutant analysis suggests that sur-6 PP2A-B acts downstream or in parallel to ras, but likely upstream of raf, and functions with ksr-1 in a common pathway to positively regulate Ras signaling.

journal_name

Genes Dev

journal_title

Genes & development

authors

Sieburth DS,Sundaram M,Howard RM,Han M

doi

10.1101/gad.13.19.2562

subject

Has Abstract

pub_date

1999-10-01 00:00:00

pages

2562-9

issue

19

eissn

0890-9369

issn

1549-5477

journal_volume

13

pub_type

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