Table 1 Neurospora’s heterochromatin machinery

From: DNA methylation and the formation of heterochromatin in Neurospora crassa

Protein

Domain(s)

Mutant phenotype

Principal activity

RID

DMT

RIP defect

DMT and/or deaminase in ascogenous cells

DIM-5

HMT

No H3K9me3; no 5mCa

Trimethylation of H3K9

HP1

Chromo and Chromo-shadow

No 5mC

Adapter protein that binds H3K9me3 and recruits DIM-2 and DMM-1

DIM-2

DMT and 2 PXVXL-related

No 5mC

5mC in vegetative cells

DMM-1

JmjC; Cys-rich and 3 A:T-hooks

5mC patterns altered

?

DMM-2

Zn(II)2Cys6

5mC patterns altered

?

PP1

Serine/threonine phosphatase

H3K9me3 and 5mC deficits

H3S10p phosphatase

  1. Abbreviations: DMM, DNA methylation modifier; DMT, DNA methyltransferases; HMT, histone methyltransferase; HP1, heterochromatin protein 1; RID, RIP defective; RIP repeat-induced point mutation.
  2. a 5mC, 5-methylcytosine.