A laterally acquired galactose oxidase-like gene is required for aerial development during osmotic stress in Streptomyces coelicolor.

ABSTRACT: Phylogenetic reconstruction revealed that most Actinobacterial orthologs of S. coelicolor SCO2837, encoding a metal-dependent galactose oxidase-like protein, are found within Streptomyces and were probably acquired by horizontal gene transfer from fungi. Disruption of SCO2837 (glxA) caused a conditional bld phenotype that could not be reversed by extracellular complementation. Studies aimed at characterising the regulation of expression of glxA showed that it is not a target for other bld genes. We provide evidence that glxA is required for osmotic adaptation, although independently from the known osmotic stress response element SigB. glxA has been predicted to be part of an operon with the transcription unit comprising the upstream cslA gene and glxA. However, both phenotypic and expressi

SUBMITTER: Liman R 

PROVIDER: S-EPMC3543389 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature