Robuta

https://elifesciences.org/articles/47534/peer-reviews
The signaling ligand (p)ppGpp regulates the enzyme HPRT across species by binding to a novel class of conserved motif, yet its specificity is allosterically...
peer reviewevolutionppgpphprtregulation
https://www.rcsb.org/structure/1SMY
Structural basis for transcription regulation by alarmone ppGpp
transcription regulationrcsbpdbstructuralbasis