Complex Proteins Associated with Set1, also known as COMPASS, is a conserved protein complex playing a major role as a H3K4me3methylase in eukaryotes.[1] Since it was first identified in 2001,[2] other members of the COMPASS family of methylases with different functions have been discovered, in particular in humans.[1]
The COMPASS complex, or similar protein complexes, have been identified in species ranging from single-celled fungi to humans.[3] They play an important regulatory role in many essential biological processes including DNA repair, the progression of the cell cycle, and transcription through the methylenation of histone lysines.[3]
The COMPASS complex is an example of a trithorax-group protein.[1] The MLL1/SET domain associated with the COMPASS complex have crystal structure.[3] The gene Cps50 coordinates the construction of COMPASS.[4]