The shape of human squalene epoxidase expands the arsenal against cancer.

TitleThe shape of human squalene epoxidase expands the arsenal against cancer.
Publication TypeJournal Article
Year of Publication2019
AuthorsBrown, AJ, Chua, NKiat, Yan, N
JournalNat Commun
Volume10
Issue1
Pagination888
Date Published2019 02 21
ISSN2041-1723
KeywordsBiosynthetic Pathways, Catalytic Domain, Cell Line, Tumor, Cholesterol, Crystallography, X-Ray, Drug Screening Assays, Antitumor, Enzyme Inhibitors, Humans, Models, Molecular, Neoplasms, Protein Conformation, Squalene Monooxygenase
Abstract

Squalene epoxidase (also known as squalene monooxygenase, EC 1.14.99.7) is a key rate-limiting enzyme in cholesterol biosynthesis. Anil Padyana and colleagues report the long awaited structure of human squalene epoxidase (SQLE). They solved the crystal structure of the catalytic domain of human SQLE alone and in complex with two similar pharmacological inhibitors and elucidate their mechanism of action. SQLE is the target of fungicides and of increasing interest in human health and disease, particularly as a new anti-cancer target. Indeed, in a companion paper, Christopher Mahoney and colleagues performed an inhibitor screen with cancer cell lines and identified SQLE as an unique vulnerability in a subset of neuroendocrine tumours, where SQLE inhibition caused a toxic accumulation of the substrate squalene. The SQLE structure will facilitate the development of improved inhibitors. Here, we comment on these two studies in the wider context of the field and discuss possible future directions.

DOI10.1038/s41467-019-08866-y
Alternate JournalNat Commun
PubMed ID30792392
PubMed Central IDPMC6384927