[English] 日本語
Yorodumi
- PDB-8etm: Human triacylglycerol synthesizing enzyme DGAT1 in complex with D... -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 8etm
TitleHuman triacylglycerol synthesizing enzyme DGAT1 in complex with DGAT1IN1 inhibitor
ComponentsDiacylglycerol O-acyltransferase 1
KeywordsTRANSFERASE/TRANSFERASE INHIBITOR / triglyceride biosynthesis / lipid storage / lipid metabolism / membrane protein / TRANSFERASE-TRANSFERASE INHIBITOR complex
Function / homology
Function and homology information


retinol O-fatty-acyltransferase / 2-acylglycerol O-acyltransferase activity / retinol O-fatty-acyltransferase activity / monoacylglycerol biosynthetic process / Triglyceride biosynthesis / diacylglycerol metabolic process / Acyl chain remodeling of DAG and TAG / long-chain fatty-acyl-CoA metabolic process / triglyceride biosynthetic process / diacylglycerol O-acyltransferase ...retinol O-fatty-acyltransferase / 2-acylglycerol O-acyltransferase activity / retinol O-fatty-acyltransferase activity / monoacylglycerol biosynthetic process / Triglyceride biosynthesis / diacylglycerol metabolic process / Acyl chain remodeling of DAG and TAG / long-chain fatty-acyl-CoA metabolic process / triglyceride biosynthetic process / diacylglycerol O-acyltransferase / diacylglycerol O-acyltransferase activity / very-low-density lipoprotein particle assembly / lipid storage / triglyceride metabolic process / acyltransferase activity / fatty acid homeostasis / specific granule membrane / Neutrophil degranulation / endoplasmic reticulum membrane / identical protein binding / membrane / plasma membrane
Similarity search - Function
Diacylglycerol O-acyltransferase 1 / Sterol O-acyltransferase, ACAT/DAG/ARE types / Membrane bound O-acyl transferase, MBOAT / MBOAT, membrane-bound O-acyltransferase family
Similarity search - Domain/homology
Chem-WTT / Diacylglycerol O-acyltransferase 1
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsSui, X. / Kun, W. / Walther, T. / Farese, R. / Liao, M.
Funding support United States, 2items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)1R01GM124348 United States
CitationJournal: Nat Commun / Year: 2023
Title: Mechanism of action for small-molecule inhibitors of triacylglycerol synthesis.
Authors: Xuewu Sui / Kun Wang / Kangkang Song / Chen Xu / Jiunn Song / Chia-Wei Lee / Maofu Liao / Robert V Farese / Tobias C Walther /
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 ...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.
History
DepositionOct 17, 2022Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jun 7, 2023Provider: repository / Type: Initial release
Revision 1.1Jun 19, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond

-
Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: Diacylglycerol O-acyltransferase 1
B: Diacylglycerol O-acyltransferase 1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)111,7814
Polymers110,6782
Non-polymers1,1032
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

-
Components

#1: Protein Diacylglycerol O-acyltransferase 1 / ACAT-related gene product 1 / Acyl-CoA retinol O-fatty-acyltransferase / Retinol O-fatty- ...ACAT-related gene product 1 / Acyl-CoA retinol O-fatty-acyltransferase / Retinol O-fatty-acyltransferase / Diglyceride acyltransferase


Mass: 55339.133 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: DGAT1, AGRP1, DGAT / Production host: Homo sapiens (human)
References: UniProt: O75907, diacylglycerol O-acyltransferase, retinol O-fatty-acyltransferase
#2: Chemical ChemComp-WTT / [(1S,4r)-4-{4-[(4S)-2-({[4-(trifluoromethoxy)phenyl]methyl}carbamoyl)imidazo[1,2-a]pyridin-6-yl]phenyl}cyclohexyl]acetic acid


Mass: 551.556 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C30H28F3N3O4 / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY

-
Experimental details

-
Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

-
Sample preparation

ComponentName: CryoEM density of human diacylglycerol O-acyltransferase 1 in complex with DGAT1IN1 inhibitor
Type: COMPLEX
Details: CryoEM density of human diacylglycerol O-acyltransferase 1 in complex with DGAT1IN1 inhibitor
Entity ID: #1 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human) / Plasmid: pFasBacMam
Buffer solutionpH: 7.5
SpecimenConc.: 5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: Protein sample was monodisperse.
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 90 %

-
Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 3500 nm / Nominal defocus min: 1500 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

-
Processing

SoftwareName: PHENIX / Version: 1.16_3549: / Classification: refinement
CTF correctionType: NONE
3D reconstructionResolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 14446 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0087022
ELECTRON MICROSCOPYf_angle_d0.7589562
ELECTRON MICROSCOPYf_dihedral_angle_d11.8724086
ELECTRON MICROSCOPYf_chiral_restr0.0441030
ELECTRON MICROSCOPYf_plane_restr0.0041224

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbjlvh1.pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more