Mitotic phosphorylation of histone H3 at threonine 3

Hara Polioudaki, Yolanda Markaki, Niki Kourmouli, George Dialynas, Panayiotis A Theodoropoulos, Prim B Singh, Spyros D Georgatos

Research output: Contribution to journalArticlepeer-review

80 Citations (Scopus)


Nuclear envelope-peripheral heterochromatin fractions contain multiple histone kinase activities. In vitro assays and amino-terminal sequencing show that one of these activities co-isolates with heterochromatin protein 1 (HP1) and phosphorylates histone H3 at threonine 3. Antibodies recognizing this post-translational modification reveal that in vivo phosphorylation at threonine 3 commences at early prophase in the vicinity of the nuclear envelope, spreads to pericentromeric chromatin during prometaphase and is fully reversed by late anaphase. This spatio-temporal pattern is distinct from H3 phosphorylation at serine 10, which also occurs during cell division, suggesting segregation of differentially phosphorylated chromatin to different regions of mitotic chromosomes.

Original languageEnglish
Pages (from-to)39-44
Number of pages6
JournalFEBS Letters
Issue number1-3
Publication statusPublished - Feb 27 2004


  • Amino Acid Sequence
  • Animals
  • Blotting, Western
  • Cell Fractionation
  • Cell Nucleus
  • Erythrocyte Membrane
  • Erythrocytes
  • Glutathione Transferase
  • Heterochromatin
  • Histones
  • Mitosis
  • Nuclear Envelope
  • Phosphorylation
  • Protein Processing, Post-Translational
  • Recombinant Fusion Proteins
  • Threonine
  • Turkeys
  • Comparative Study
  • Journal Article
  • Research Support, Non-U.S. Gov't

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