PMID- 20154675 OWN - NLM STAT- MEDLINE DCOM- 20100415 LR - 20230411 IS - 1546-1718 (Electronic) IS - 1061-4036 (Print) IS - 1061-4036 (Linking) VI - 42 IP - 3 DP - 2010 Mar TI - Germline mutations in TMEM127 confer susceptibility to pheochromocytoma. PG - 229-33 LID - 10.1038/ng.533 [doi] AB - Pheochromocytomas, which are catecholamine-secreting tumors of neural crest origin, are frequently hereditary. However, the molecular basis of the majority of these tumors is unknown. We identified the transmembrane-encoding gene TMEM127 on chromosome 2q11 as a new pheochromocytoma susceptibility gene. In a cohort of 103 samples, we detected truncating germline TMEM127 mutations in approximately 30% of familial tumors and about 3% of sporadic-appearing pheochromocytomas without a known genetic cause. The wild-type allele was consistently deleted in tumor DNA, suggesting a classic mechanism of tumor suppressor gene inactivation. Pheochromocytomas with mutations in TMEM127 are transcriptionally related to tumors bearing NF1 mutations and, similarly, show hyperphosphorylation of mammalian target of rapamycin (mTOR) effector proteins. Accordingly, in vitro gain-of-function and loss-of-function analyses indicate that TMEM127 is a negative regulator of mTOR. TMEM127 dynamically associates with the endomembrane system and colocalizes with perinuclear (activated) mTOR, suggesting a subcompartmental-specific effect. Our studies identify TMEM127 as a tumor suppressor gene and validate the power of hereditary tumors to elucidate cancer pathogenesis. FAU - Qin, Yuejuan AU - Qin Y AD - Departments of Medicine, San Antonio, Texas, USA. FAU - Yao, Li AU - Yao L FAU - King, Elizabeth E AU - King EE FAU - Buddavarapu, Kalyan AU - Buddavarapu K FAU - Lenci, Romina E AU - Lenci RE FAU - Chocron, E Sandra AU - Chocron ES FAU - Lechleiter, James D AU - Lechleiter JD FAU - Sass, Meghan AU - Sass M FAU - Aronin, Neil AU - Aronin N FAU - Schiavi, Francesca AU - Schiavi F FAU - Boaretto, Francesca AU - Boaretto F FAU - Opocher, Giuseppe AU - Opocher G FAU - Toledo, Rodrigo A AU - Toledo RA FAU - Toledo, Sergio P A AU - Toledo SP FAU - Stiles, Charles AU - Stiles C FAU - Aguiar, Ricardo C T AU - Aguiar RC FAU - Dahia, Patricia L M AU - Dahia PL LA - eng SI - GEO/GSE19987 GR - P30 CA54174/CA/NCI NIH HHS/United States GR - P30 CA054174-17/CA/NCI NIH HHS/United States GR - P01 AG019316/AG/NIA NIH HHS/United States GR - UL1 RR025767-02/RR/NCRR NIH HHS/United States GR - UL1 TR000149/TR/NCATS NIH HHS/United States GR - P30 CA054174/CA/NCI NIH HHS/United States GR - NIH-P30 CA54174/CA/NCI NIH HHS/United States GR - P01AG19316/AG/NIA NIH HHS/United States GR - UL1 RR025767/RR/NCRR NIH HHS/United States GR - P30 AG013319/AG/NIA NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20100214 PL - United States TA - Nat Genet JT - Nature genetics JID - 9216904 RN - 0 (Membrane Proteins) RN - 0 (TMEM127 protein, human) SB - IM MH - Adrenal Gland Neoplasms/*genetics MH - Adult MH - Aged MH - Cells, Cultured MH - Cohort Studies MH - DNA Mutational Analysis MH - Family MH - Genetic Predisposition to Disease MH - *Germ-Line Mutation/physiology MH - Humans MH - Membrane Proteins/*genetics MH - Middle Aged MH - Pheochromocytoma/*genetics MH - Polymorphism, Single Nucleotide/physiology PMC - PMC2998199 MID - NIHMS172048 EDAT- 2010/02/16 06:00 MHDA- 2010/04/16 06:00 PMCR- 2010/12/07 CRDT- 2010/02/16 06:00 PHST- 2009/10/01 00:00 [received] PHST- 2010/01/20 00:00 [accepted] PHST- 2010/02/16 06:00 [entrez] PHST- 2010/02/16 06:00 [pubmed] PHST- 2010/04/16 06:00 [medline] PHST- 2010/12/07 00:00 [pmc-release] AID - ng.533 [pii] AID - 10.1038/ng.533 [doi] PST - ppublish SO - Nat Genet. 2010 Mar;42(3):229-33. doi: 10.1038/ng.533. Epub 2010 Feb 14.