期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 114, 期 27, 页码 7160-7165出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1705154114
关键词
sigma-2 receptor; sigma receptors; TMEM97; cholesterol regulation; NPC1
资金
- NIMH PDSP [HHSN-271-2013-00017-C]
- NIH [1DP5OD021345]
- Vallee Scholars Program
- Harvard Brain Science Initiative Winthrop Fund
- Klingenstein-Simons Fellowship Program
- Robert A. Welch Foundation [F-0652]
- Alzheimer's Disease Research Program
- BrightFocus Foundation
- Dell Medical School's Texas Health Catalyst Program
- National Science Foundation Graduate Research Fellowship
The sigma(2) receptor is an enigmatic protein that has attracted significant attention because of its involvement in diseases as diverse as cancer and neurological disorders. Unlike virtually all other receptors of medical interest, it has eluded molecular cloning since its discovery, and the gene that codes for the receptor remains unknown, precluding the use of modern biological methods to study its function. Using a chemical biology approach, we purified the sigma(2) receptor from tissue, revealing its identity as TMEM97, an endoplasmic reticulum-resident transmembrane protein that regulates the sterol transporter NPC1. We show that TMEM97 possesses the full suite of molecular properties that define the sigma(2) receptor, and we identify Asp29 and Asp56 as essential for ligand recognition. Cloning the sigma(2) receptor resolves a longstanding mystery and will enable therapeutic targeting of this potential drug target.
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