8VM7 | pdb_00008vm7

Deposited: 2024-01-13 Released: 2025-02-26
Deposition Author(s): Schultz, K., Marmorstein, R.
Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

Experimental Data Snapshot

Starting Models: in silico, experimental
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wwPDB Validation 3D Report Full Report

This is version 1.2 of the entry. See complete history.

(2025) Nature 641: 520-528

PubMed: 39979457 Search on PubMed Search on PubMed Central
DOI: https://doi.org/10.1038/s41586-025-08587-x
Primary Citation Related Structures:
8VF7, 8VG4, 8VLE, 8VLO, 8VLP, 8VM0, 8VM5, 8VM6, 8VM7, 8VMC, 8VMD

PubMed Abstract:
The mammalian fatty acid synthase (FASN) enzyme is a dynamic multienzyme that belongs to the megasynthase family. In mammals, a single gene encodes six catalytically active domains and a flexibly tethered acyl carrier protein (ACP) domain that shuttles intermediates between active sites for fatty acid biosynthesis ¹. FASN is an essential enzyme in mammalian development through the role that fatty acids have in membrane formation, energy storage, cell signalling and protein modifications. Thus, FASN is a promising target for treatment of a large variety of diseases including cancer, metabolic dysfunction-associated fatty liver disease, and viral and parasite infections ^2,3. The multi-faceted mechanism of FASN and the dynamic nature of the protein, in particular of the ACP, have made it challenging to understand at the molecular level. Here we report cryo-electron microscopy structures of human FASN in a multitude of conformational states with NADPH and NADP ⁺ plus acetoacetyl-CoA present, including structures with the ACP stalled at the dehydratase (DH) and enoyl-reductase (ER) domains. We show that FASN activity in vitro and de novo lipogenesis in cells is inhibited by mutations at the ACP-DH and ACP-ER interfaces. Together, these studies provide new molecular insights into the dynamic nature of FASN and the ACP shuttling mechanism, with implications for developing improved FASN-targeted therapeutics.

Organizational Affiliation

Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. kollin.schultz@pennmedicine.upenn.edu.

Macromolecule Content

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Fatty acid synthase	A, B	2,553	Homo sapiens	Mutation(s): 0 Gene Names: FASN, FAS EC: 2.3.1.85 (PDB Primary Data), 2.3.1.38 (PDB Primary Data), 2.3.1.39 (PDB Primary Data), 2.3.1.41 (PDB Primary Data), 1.1.1.100 (PDB Primary Data), 4.2.1.59 (PDB Primary Data), 1.3.1.39 (PDB Primary Data), 3.1.2.14 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P49327 (Homo sapiens) Explore P49327 Go to UniProtKB: P49327
PHAROS: P49327 GTEx: ENSG00000169710
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P49327
Sequence Annotations Expand
Reference Sequence

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
NDP (Subject of Investigation/LOI) Query on NDP Download:Ideal Coordinates CCD File SDF format, chain C [auth A] SDF format, chain D [auth A] SDF format, chain E [auth B] SDF format, chain F [auth B] MOL2 format, chain C [auth A] MOL2 format, chain D [auth A] MOL2 format, chain E [auth B] MOL2 format, chain F [auth B] mmCIF format, chain C [auth A] mmCIF format, chain D [auth A] mmCIF format, chain E [auth B] mmCIF format, chain F [auth B]	C [auth A], D [auth A], E [auth B], F [auth B]	NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE C₂₁ H₃₀ N₇ O₁₇ P₃ ACFIXJIJDZMPPO-NNYOXOHSSA-N		Interactions Focus chain C [auth A] Focus chain D [auth A] Focus chain E [auth B] Focus chain F [auth B] Interactions & Density Focus chain C [auth A] Focus chain D [auth A] Focus chain E [auth B] Focus chain F [auth B]