facultative heterochromatin formation
The compaction of chromatin into a conformation that is refractory to transcription but that can be converted to euchromatin and allow transcription in specific contexts. These can be temporal (e.g., developmental states or specific cell-cycle stages), spatial (e.g., nuclear localization changes from the center to the periphery or vice versa due to exogenous factors/signals), or parental/heritable (e.g., monoallelic gene expression). In metazoa, this involves the methylation of histone H3K27, and in certain cases methylation of H3K9. On the other hand, in unicellular eukaryotes, only methylation of H3K9 is involved and H3K27 is not methylated.
GO:0031507
heterochromatin formation
is_a
fHC assembly
exact
facultative heterochromatin assembly
exact
SPBC1105.04c SPBC16C6.10 SPAC56F8.09 SPBC146.09c SPAC1783.04c SPCC622.16c SPAC824.04 SPBC16D10.07c SPAC1006.03c SPBC30D10.10c SPBC25D12.02c SPBC800.03 SPAC3G9.04 SPAC7D4.14c SPBP35G2.10 SPAC23E2.02 SPBC1685.08 SPAC17H9.02 SPCC24B10.07 SPCC132.02 SPAC19G12.17 SPCC736.12c SPBC428.08c SPAC1B3.17 SPCC306.04c SPBC2D10.17 SPBC216.07c SPBC20F10.05