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© Research
Publication : EMBO reports

DYRK1A phoshorylates histone H3 to differentially regulate the binding of HP1 isoforms and antagonize HP1-mediated transcriptional repression

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in EMBO reports - 12 May 2014

Jang SM, Azebi S, Soubigou G, Muchardt C

Link to Pubmed [PMID] – 24820035

EMBO Rep. 2014 Jun;15(6):686-94

Heterochromatin protein 1 (HP1) proteins are chromatin-bound transcriptional regulators. While their chromodomain binds histone H3 methylated on lysine 9, their chromoshadow domain associates with the H3 histone fold in a region involved in chromatin remodeling. Here, we show that phosphorylation at histone H3 threonine 45 and serine 57 within this latter region differentially affects binding of the three mammalian HP1 isoforms HP1α, HP1β and HP1γ. Both phosphorylation events are dependent on the activity of the DYRK1A kinase that antagonizes HP1-mediated transcriptional repression and participates in abnormal activation of cytokine genes in Down’s syndrome-associated megakaryoblastic leukemia.

http://www.ncbi.nlm.nih.gov/pubmed/24820035