Greater phenotypic variation is exposed by mutations in a gene regulatory system compared to mutations in its constitutive components, namely the transcription factor and the promoter, alone.
The molecular mechanism of switching between phosphotransferase- and phosphatase-competent states in histidine-kinases has been uncovered, through direct crystallographic observation of bona fide complexes between a histidine-kinase and its response regulator from Bacillus subtilise.
A protein within the nuclear membrane, MAN1, controls the expression of the circadian clock gene, BMAL1, in an example of cross-talk between two major gene regulatory pathways.
Complementary effects of FBF-1 and FBF-2 on germline stem cell dynamics result from their distinct cooperation with mRNA deadenylase resulting in the opposite effects on the shared target mRNAs.