PMID- 17050672 OWN - NLM STAT- MEDLINE DCOM- 20070212 LR - 20190816 IS - 1541-7786 (Print) IS - 1541-7786 (Linking) VI - 4 IP - 10 DP - 2006 Oct TI - Phosphorylation of the menin tumor suppressor protein on serine 543 and serine 583. PG - 793-801 AB - Multiple endocrine neoplasia type 1 (MEN-1) is a heritable syndrome typified by tumors in multiple endocrine organs, including the pituitary, parathyroids, and pancreatic islets. MEN-1 is attributable to mutations in the MEN1 tumor-suppressor gene that encodes the menin protein. Recent studies have implicated menin in transcriptional regulation and in covalent histone modification; however, little is known about modifications of the menin protein. Here, we report that menin is subject to phosphorylation on serine residues, including Ser543 and Ser583. Phosphorylation-defective mutants of either or both of these residues retain the associated histone methyltransferase activity of menin, as well as binding to the trithorax complex members Ash2L, Rbbp5, and MLL2 and to RNA polymerase II. Chromatin immunoprecipitation experiments reveal that binding of menin to the Hoxc8 locus is not affected by phosphorylation on Ser543 or Ser583. FAU - MacConaill, Laura E AU - MacConaill LE AD - Department of Medical Oncology, Dana-Farber Cancer Institute, 44 Binney St., Boston, MA 02115, USA. FAU - Hughes, Christina M AU - Hughes CM FAU - Rozenblatt-Rosen, Orit AU - Rozenblatt-Rosen O FAU - Nannepaga, Suraj AU - Nannepaga S FAU - Meyerson, Matthew AU - Meyerson M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Mol Cancer Res JT - Molecular cancer research : MCR JID - 101150042 RN - 0 (DNA-Binding Proteins) RN - 0 (Homeodomain Proteins) RN - 0 (KMT2D protein, human) RN - 0 (MEN1 protein, human) RN - 0 (Neoplasm Proteins) RN - 0 (Protein Isoforms) RN - 0 (Proto-Oncogene Proteins) RN - 0 (Tumor Suppressor Proteins) RN - 452VLY9402 (Serine) RN - EC 2.1.1.- (Histone Methyltransferases) RN - EC 2.1.1.- (Protein Methyltransferases) RN - EC 2.1.1.43 (Histone-Lysine N-Methyltransferase) SB - IM MH - Cell Differentiation MH - Cells, Cultured MH - Chromatin Immunoprecipitation MH - DNA Damage MH - DNA-Binding Proteins/*metabolism MH - HL-60 Cells MH - Histone Methyltransferases MH - Histone-Lysine N-Methyltransferase/*metabolism MH - Homeodomain Proteins/metabolism MH - Humans MH - Neoplasm Proteins/*metabolism MH - Phosphorylation MH - Protein Binding MH - Protein Isoforms MH - Protein Methyltransferases MH - Proto-Oncogene Proteins/*metabolism MH - *Serine MH - Transfection MH - Tumor Suppressor Proteins/*metabolism EDAT- 2006/10/20 09:00 MHDA- 2007/02/13 09:00 CRDT- 2006/10/20 09:00 PHST- 2006/10/20 09:00 [pubmed] PHST- 2007/02/13 09:00 [medline] PHST- 2006/10/20 09:00 [entrez] AID - 4/10/793 [pii] AID - 10.1158/1541-7786.MCR-06-0123 [doi] PST - ppublish SO - Mol Cancer Res. 2006 Oct;4(10):793-801. doi: 10.1158/1541-7786.MCR-06-0123.