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- PDB-9mj9: Condensing wing of FASN with phosphopantetheine-modified partial ACP -

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Basic information

Entry
Database: PDB / ID: 9mj9
TitleCondensing wing of FASN with phosphopantetheine-modified partial ACP
Components(Fatty acid synthase) x 2
KeywordsTRANSFERASE / De novo fatty acid synthesis Fatty acid synthase / BIOSYNTHETIC PROTEIN
Function / homology
Function and homology information


fatty-acid synthase system / ether lipid biosynthetic process / Vitamin B5 (pantothenate) metabolism / neutrophil differentiation / fatty-acyl-CoA biosynthetic process / enoyl-[acyl-carrier-protein] reductase (NADPH, Re-specific) / glandular epithelial cell development / establishment of endothelial intestinal barrier / [acyl-carrier-protein] S-acetyltransferase / [acyl-carrier-protein] S-acetyltransferase activity ...fatty-acid synthase system / ether lipid biosynthetic process / Vitamin B5 (pantothenate) metabolism / neutrophil differentiation / fatty-acyl-CoA biosynthetic process / enoyl-[acyl-carrier-protein] reductase (NADPH, Re-specific) / glandular epithelial cell development / establishment of endothelial intestinal barrier / [acyl-carrier-protein] S-acetyltransferase / [acyl-carrier-protein] S-acetyltransferase activity / glycogen granule / Fatty acyl-CoA biosynthesis / oleoyl-[acyl-carrier-protein] hydrolase / fatty acyl-[ACP] hydrolase activity / modulation by host of viral process / ChREBP activates metabolic gene expression / [acyl-carrier-protein] S-malonyltransferase / 3-hydroxyacyl-[acyl-carrier-protein] dehydratase / enoyl-[acyl-carrier-protein] reductase (NADPH) activity / [acyl-carrier-protein] S-malonyltransferase activity / beta-ketoacyl-[acyl-carrier-protein] synthase I / (3R)-hydroxyacyl-[acyl-carrier-protein] dehydratase activity / NR1H2 & NR1H3 regulate gene expression linked to lipogenesis / mammary gland development / 3-oxoacyl-[acyl-carrier-protein] reductase / 3-oxoacyl-[acyl-carrier-protein] reductase (NADPH) activity / fatty acid synthase activity / monocyte differentiation / phosphopantetheine binding / 3-oxoacyl-[acyl-carrier-protein] synthase activity / cellular response to interleukin-4 / Activation of gene expression by SREBF (SREBP) / fatty acid metabolic process / fatty acid biosynthetic process / osteoblast differentiation / melanosome / cadherin binding / inflammatory response / Golgi apparatus / RNA binding / extracellular exosome / membrane / plasma membrane / cytosol / cytoplasm
Similarity search - Function
: / Fatty acid synthase, pseudo-KR domain / Methyltransferase type 12 / Methyltransferase domain / Thioesterase / Thioesterase domain / Polyketide synthase, dehydratase domain / PKS_DH / : / Polyketide synthase dehydratase domain ...: / Fatty acid synthase, pseudo-KR domain / Methyltransferase type 12 / Methyltransferase domain / Thioesterase / Thioesterase domain / Polyketide synthase, dehydratase domain / PKS_DH / : / Polyketide synthase dehydratase domain / Polyketide synthase, dehydratase domain superfamily / : / Polyketide and metazoan fatty acid synthase dehydratase (PKS/mFAS DH) domain profile. / Polyketide synthase, C-terminal extension / Ketoacyl-synthetase C-terminal extension / Polyketide synthase, ketoreductase domain / KR domain / Malonyl-CoA ACP transacylase, ACP-binding / : / Alcohol dehydrogenase-like, C-terminal / Acyl transferase / Acyl transferase domain / Acyl transferase domain in polyketide synthase (PKS) enzymes. / Zinc-binding dehydrogenase / Acyl transferase domain superfamily / Acyl transferase/acyl hydrolase/lysophospholipase / Polyketide synthase, enoylreductase domain / Enoylreductase / Polyketide synthase, phosphopantetheine-binding domain / Phosphopantetheine attachment site / PKS_KR / Beta-ketoacyl synthase, active site / Ketosynthase family 3 (KS3) active site signature. / Beta-ketoacyl synthase / Ketosynthase family 3 (KS3) domain profile. / Beta-ketoacyl synthase, N-terminal / Beta-ketoacyl synthase, C-terminal / Polyketide synthase, beta-ketoacyl synthase domain / Beta-ketoacyl synthase, N-terminal domain / Beta-ketoacyl synthase, C-terminal domain / GroES-like superfamily / Thiolase-like / Phosphopantetheine attachment site / Phosphopantetheine attachment site. / Phosphopantetheine attachment site / ACP-like superfamily / Carrier protein (CP) domain profile. / Phosphopantetheine binding ACP domain / Alpha/Beta hydrolase fold / NAD(P)-binding domain superfamily / S-adenosyl-L-methionine-dependent methyltransferase superfamily
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2 Å
AuthorsChoi, W. / Li, C. / Chen, Y. / Wang, Y. / Cheng, Y.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35GM140847 United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)U54AI170792 United States
CitationJournal: Nature / Year: 2025
Title: Structural dynamics of human fatty acid synthase in the condensing cycle.
Authors: Wooyoung Choi / Chengmin Li / Yifei Chen / YongQiang Wang / Yifan Cheng /
Abstract: Long-chain fatty acids are the building blocks of fat in human bodies. In mammals, fatty acid synthase (FASN) contains multiple enzymatic domains to catalyse all chemical reactions needed for de novo ...Long-chain fatty acids are the building blocks of fat in human bodies. In mammals, fatty acid synthase (FASN) contains multiple enzymatic domains to catalyse all chemical reactions needed for de novo fatty acid synthesis. Although the chemical reactions carried out by these enzymatic domains are well defined, how the dimeric FASN with an open architecture continuously catalyses such reactions to synthesize a complete fatty acid remains elusive. Here, using a strategy of tagging and purifying endogenous FASN in HEK293T cells for single-particle cryo-electron microscopy studies, we characterized the structural dynamics of endogenous human FASN. We captured conformational snapshots of various functional substates in the condensing cycle and developed a procedure to analyse the particle distribution landscape of FASN with different orientations between its condensing and modifying wings. Together, our findings reveal that FASN function does not require a large rotational motion between its two main functional domains during the condensing cycle, and that the catalytic reactions in the condensing cycle carried out by the two monomers are unsynchronized. Our data thus provide a new composite view of FASN dynamics during the fatty acid synthesis condensing cycle.
History
DepositionDec 14, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 26, 2025Provider: repository / Type: Initial release
Revision 1.1Mar 5, 2025Group: Database references / Category: citation / Item: _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.2May 21, 2025Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Fatty acid synthase
B: Fatty acid synthase
C: Fatty acid synthase


Theoretical massNumber of molelcules
Total (without water)187,2793
Polymers187,2793
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein Fatty acid synthase / Type I fatty acid synthase


Mass: 92515.781 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)
References: UniProt: P49327, fatty-acid synthase system, [acyl-carrier-protein] S-acetyltransferase, [acyl-carrier-protein] S-malonyltransferase, beta-ketoacyl-[acyl-carrier-protein] synthase I, 3- ...References: UniProt: P49327, fatty-acid synthase system, [acyl-carrier-protein] S-acetyltransferase, [acyl-carrier-protein] S-malonyltransferase, beta-ketoacyl-[acyl-carrier-protein] synthase I, 3-oxoacyl-[acyl-carrier-protein] reductase, 3-hydroxyacyl-[acyl-carrier-protein] dehydratase, enoyl-[acyl-carrier-protein] reductase (NADPH, Re-specific), oleoyl-[acyl-carrier-protein] hydrolase
#2: Protein/peptide Fatty acid synthase / Type I fatty acid synthase


Mass: 2247.484 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)
References: UniProt: P49327, fatty-acid synthase system, [acyl-carrier-protein] S-acetyltransferase, [acyl-carrier-protein] S-malonyltransferase, beta-ketoacyl-[acyl-carrier-protein] synthase I, 3- ...References: UniProt: P49327, fatty-acid synthase system, [acyl-carrier-protein] S-acetyltransferase, [acyl-carrier-protein] S-malonyltransferase, beta-ketoacyl-[acyl-carrier-protein] synthase I, 3-oxoacyl-[acyl-carrier-protein] reductase, 3-hydroxyacyl-[acyl-carrier-protein] dehydratase, enoyl-[acyl-carrier-protein] reductase (NADPH, Re-specific), oleoyl-[acyl-carrier-protein] hydrolase
Has ligand of interestY
Has protein modificationY

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Experimental details

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Experiment

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

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Sample preparation

ComponentName: Human endogenous FASN / Type: COMPLEX / Entity ID: all / Source: NATURAL
Source (natural)Organism: Homo sapiens (human)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1500 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 45.8 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 752729 / Symmetry type: POINT

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