The non-signaling complex formed by Activin A and ACVR1 is operant in vivo and is required to temper the degree of heterotopic ossification in the genetic disorder fibrodysplasia ossificans progressiva.
The requirement for WNT signaling in mesendoderm differentiation is temporally separate from that of ACTIVIN signaling and acts to switch the output of ACTIVIN/SMAD2 from pluripotency maintenance to mesendoderm patterning.
Metabolic activity of the methionine/S-adenosylmethionine cycle is sensed and transcriptionally regulated by a nuclear hormone receptor in Caenorhabditis elegans in order to maintain metabolic homeostasis in a tightly controlled regime.
Chronic engagement of Natural killer cell inhibitory receptors by MHC-I molecules maintains a high activity of the mTOR pathway allowing subsequent amplification of signaling through activating receptors upon acute stimulation.
Clarinet, a novel C. elegans active zone protein with homology to vertebrate Piccolo and Rim, uses its different isoforms for diverse functions, including synaptic vesicle clustering, vesicle release and synaptogenesis.