8ETM

Human triacylglycerol synthesizing enzyme DGAT1 in complex with DGAT1IN1 inhibitor


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Mechanism of action for small-molecule inhibitors of triacylglycerol synthesis.

Sui, X.Wang, K.Song, K.Xu, C.Song, J.Lee, C.W.Liao, M.Farese Jr., R.V.Walther, T.C.

(2023) Nat Commun 14: 3100-3100

  • DOI: https://doi.org/10.1038/s41467-023-38934-3
  • Primary Citation of Related Structures:  
    8ESM, 8ETM

  • PubMed Abstract: 

    Inhibitors of triacylglycerol (TG) synthesis have been developed to treat metabolism-related diseases, but we know little about their mechanisms of action. Here, we report cryo-EM structures of the TG-synthesis enzyme acyl-CoA:diacylglycerol acyltransferase 1 (DGAT1), a membrane bound O-acyltransferase (MBOAT), in complex with two different inhibitors, T863 and DGAT1IN1. Each inhibitor binds DGAT1's fatty acyl-CoA substrate binding tunnel that opens to the cytoplasmic side of the ER. T863 blocks access to the tunnel entrance, whereas DGAT1IN1 extends further into the enzyme, with an amide group interacting with more deeply buried catalytic residues. A survey of DGAT1 inhibitors revealed that this amide group may serve as a common pharmacophore for inhibition of MBOATs. The inhibitors were minimally active against the related MBOAT acyl-CoA:cholesterol acyltransferase 1 (ACAT1), yet a single-residue mutation sensitized ACAT1 for inhibition. Collectively, our studies provide a structural foundation for developing DGAT1 and other MBOAT inhibitors.


  • Organizational Affiliation

    Department of Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, MA, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Diacylglycerol O-acyltransferase 1
A, B
488Homo sapiensMutation(s): 0 
Gene Names: DGAT1AGRP1DGAT
EC: 2.3.1.20 (PDB Primary Data), 2.3.1.76 (PDB Primary Data)
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for O75907 (Homo sapiens)
Explore O75907 
Go to UniProtKB:  O75907
PHAROS:  O75907
GTEx:  ENSG00000185000 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO75907
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
WTT (Subject of Investigation/LOI)
Query on WTT

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
[(1S,4r)-4-{4-[(4S)-2-({[4-(trifluoromethoxy)phenyl]methyl}carbamoyl)imidazo[1,2-a]pyridin-6-yl]phenyl}cyclohexyl]acetic acid
C30 H28 F3 N3 O4
KFGSQOIWOCDWAS-XUTJKUGGSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Howard Hughes Medical Institute (HHMI)United States--
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States1R01GM124348

Revision History  (Full details and data files)

  • Version 1.0: 2023-06-07
    Type: Initial release
  • Version 1.1: 2024-06-19
    Changes: Data collection