Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
, 117 (1), 267-76

Intercellular Signaling Is Required for Developmental Gene Expression in Myxococcus Xanthus

Intercellular Signaling Is Required for Developmental Gene Expression in Myxococcus Xanthus

A Kuspa et al. Dev Biol.

Abstract

Certain developmental mutants of Myxococcus xanthus can be complemented (extracellularly) by wild-type cells. Insertions of Tn5 lac (a transposon which couples beta-galactosidase expression to exogenous promoters) into developmentally regulated genes were used to investigate extracellular complementation of the A group mutations. A- mutations reduced developmental beta-galactosidase expression from 18 of 21 Tn5 lac insertions tested and that expression was restored to A- Tn5 lac cells by adding wild-type cells. The earliest A-dependent Tn5 lac normally expresses beta-galactosidase at 1.5 hr of development indicating a developmental block at 1-2 hr in A- mutants. A substance which can rescue the expression of this early Tn5 lac is released by wild-type (A+) but not by A- cells. This substance appears in a cell-free wash of wild-type cells or in starvation buffer conditioned by wild-type cells 1-2 hr after development is initiated. The conditioned starvation buffer also restores normal morphological development to an A- mutant.

Similar articles

See all similar articles

Cited by 95 articles

See all "Cited by" articles

Publication types

LinkOut - more resources

Feedback