PMID- 16951149 OWN - NLM STAT- MEDLINE DCOM- 20071126 LR - 20201209 IS - 1538-7445 (Electronic) IS - 0008-5472 (Linking) VI - 66 IP - 17 DP - 2006 Sep 1 TI - Multiple endocrine neoplasia type 1 interacts with forkhead transcription factor CHES1 in DNA damage response. PG - 8397-403 AB - Multiple endocrine neoplasia type 1 (MEN1) is a cancer susceptibility syndrome affecting several endocrine tissues. Investigations of the biochemical function of the MEN1 protein, menin, have suggested a role as a transcriptional comodulator. The mechanism by which MEN1 inactivation leads to tumor formation is not fully understood. MEN1 was implicated to function in both regulation of cell proliferation and maintenance of genomic integrity. Here, we investigate the mechanism by which MEN1 affects DNA damage response. We found that Drosophila larval tissue and mouse embryonic fibroblasts mutant for the MEN1 homologue were deficient for a DNA damage-activated S-phase checkpoint. The forkhead transcription factor CHES1 (FOXN3) was identified as an interacting protein by a genetic screen, and overexpression of CHES1 restored both cell cycle arrest and viability of MEN1 mutant flies after ionizing radiation exposure. We showed a biochemical interaction between human menin and CHES1 and showed that the COOH terminus of menin, which is frequently mutated in MEN1 patients, is necessary for this interaction. Our data indicate that menin is involved in the activation of S-phase arrest in response to ionizing radiation. CHES1 is a component of a transcriptional repressor complex, that includes mSin3a, histone deacetylase (HDAC) 1, and HDAC2, and it interacts with menin in an S-phase checkpoint pathway related to DNA damage response. FAU - Busygina, Valeria AU - Busygina V AD - Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA. FAU - Kottemann, Molly C AU - Kottemann MC FAU - Scott, Kenneth L AU - Scott KL FAU - Plon, Sharon E AU - Plon SE FAU - Bale, Allen E AU - Bale AE LA - eng GR - R01-GM57426/GM/NIGMS NIH HHS/United States GR - R01-GM66079/GM/NIGMS NIH HHS/United States GR - T32-GM008753/GM/NIGMS NIH HHS/United States GR - T32-GM08307/GM/NIGMS NIH HHS/United States GR - T32-HD07149-29/HD/NICHD NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, U.S. Gov't, Non-P.H.S. PL - United States TA - Cancer Res JT - Cancer research JID - 2984705R RN - 0 (Cell Cycle Proteins) RN - 0 (DNA, Neoplasm) RN - 0 (Drosophila Proteins) RN - 0 (FOXN3 protein, human) RN - 0 (Forkhead Transcription Factors) RN - 0 (MEN1 protein, human) RN - 0 (Mnn1 protein, Drosophila) RN - 0 (Proto-Oncogene Proteins) RN - 0 (Recombinant Proteins) RN - 0 (Repressor Proteins) SB - IM EIN - Cancer Res. 2006 Dec 15;66(24):12039 MH - Animals MH - Cell Cycle Proteins/*genetics/metabolism MH - Cell Division MH - Cell Line MH - *DNA Damage MH - DNA, Neoplasm/*genetics MH - Drosophila Proteins/genetics MH - Drosophila melanogaster/genetics MH - Forkhead Transcription Factors MH - G2 Phase MH - Humans MH - Larva MH - Multiple Endocrine Neoplasia Type 1/*genetics/pathology MH - Proto-Oncogene Proteins/*genetics/metabolism MH - Recombinant Proteins/metabolism MH - Repressor Proteins/*genetics/metabolism MH - Transfection EDAT- 2006/09/05 09:00 MHDA- 2007/12/06 09:00 CRDT- 2006/09/05 09:00 PHST- 2006/09/05 09:00 [pubmed] PHST- 2007/12/06 09:00 [medline] PHST- 2006/09/05 09:00 [entrez] AID - 66/17/8397 [pii] AID - 10.1158/0008-5472.CAN-06-0061 [doi] PST - ppublish SO - Cancer Res. 2006 Sep 1;66(17):8397-403. doi: 10.1158/0008-5472.CAN-06-0061.