Sequence Help

HMR Sequence

Sequences and genome annotation information for Reference Strain S288C and a select set of Alternative References.

Feature Type
silent mating type cassette array
Mating-type cassette - right; unexpressed complete copy of the mating-type genes, silenced by the Sir2 histone deacetylase and its associated SIR1, SIR3 and SIR4 proteins; mating-type switching involves replacement of the Ya or Yalpha sequences present at the MAT locus with either the a or alpha genes located at one of the HM loci in a process stimulated by the HO endonuclease; sequence replacement occurs by gene conversion, leaving the donor unaltered 1 2