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- PDB-6ct0: Atomic Structure of the E2 Inner Core of Human Pyruvate Dehydroge... -

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Entry
Database: PDB / ID: 6ct0
TitleAtomic Structure of the E2 Inner Core of Human Pyruvate Dehydrogenase Complex
ComponentsDihydrolipoyllysine-residue acetyltransferase component of pyruvate dehydrogenase complex, mitochondrialDihydrolipoyl transacetylase
KeywordsOXIDOREDUCTASE / Pyruvate Dehydrogenase Complex / E2 / Inner Core
Function / homology
Function and homology information


dihydrolipoyllysine-residue acetyltransferase / dihydrolipoyllysine-residue acetyltransferase activity / acetyl-CoA biosynthetic process from pyruvate / pyruvate dehydrogenase complex / : / Pyruvate metabolism / Glyoxylate metabolism and glycine degradation / Regulation of pyruvate dehydrogenase (PDH) complex / Signaling by Retinoic Acid / tricarboxylic acid cycle ...dihydrolipoyllysine-residue acetyltransferase / dihydrolipoyllysine-residue acetyltransferase activity / acetyl-CoA biosynthetic process from pyruvate / pyruvate dehydrogenase complex / : / Pyruvate metabolism / Glyoxylate metabolism and glycine degradation / Regulation of pyruvate dehydrogenase (PDH) complex / Signaling by Retinoic Acid / tricarboxylic acid cycle / glucose metabolic process / mitochondrial matrix / intracellular membrane-bounded organelle / mitochondrion / identical protein binding
Similarity search - Function
Dihydrolipoyllysine-residue acetyltransferase component of pyruvate dehydrogenase complex / Dihydrolipoamide acetyltransferase/Pyruvate dehydrogenase protein X component / Peripheral subunit-binding domain / e3 binding domain / Peripheral subunit-binding (PSBD) domain profile. / E3-binding domain superfamily / 2-oxo acid dehydrogenase, lipoyl-binding site / 2-oxo acid dehydrogenases acyltransferase component lipoyl binding site. / 2-oxoacid dehydrogenase acyltransferase, catalytic domain / 2-oxoacid dehydrogenases acyltransferase (catalytic domain) ...Dihydrolipoyllysine-residue acetyltransferase component of pyruvate dehydrogenase complex / Dihydrolipoamide acetyltransferase/Pyruvate dehydrogenase protein X component / Peripheral subunit-binding domain / e3 binding domain / Peripheral subunit-binding (PSBD) domain profile. / E3-binding domain superfamily / 2-oxo acid dehydrogenase, lipoyl-binding site / 2-oxo acid dehydrogenases acyltransferase component lipoyl binding site. / 2-oxoacid dehydrogenase acyltransferase, catalytic domain / 2-oxoacid dehydrogenases acyltransferase (catalytic domain) / Biotin-requiring enzyme / Biotinyl/lipoyl domain profile. / Biotin/lipoyl attachment / Single hybrid motif / Chloramphenicol acetyltransferase-like domain superfamily
Similarity search - Domain/homology
Dihydrolipoyllysine-residue acetyltransferase component of pyruvate dehydrogenase complex, mitochondrial
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsJiang, J. / Baiesc, F.L. / Hiromasa, Y. / Yu, X. / Hui, W.H. / Dai, X. / Roche, T.E. / Zhou, Z.H.
Funding support United States, 8items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01GM071940 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)DE025567 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)AI094386 United States
National Science Foundation (NSF, United States)DMR-1548924 United States
American Heart Association14POST18870059 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)1S10RR23057 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)1S10OD018111 United States
National Science Foundation (NSF, United States) United States
CitationJournal: Biochemistry / Year: 2018
Title: Atomic Structure of the E2 Inner Core of Human Pyruvate Dehydrogenase Complex.
Authors: Jiansen Jiang / Flavius L Baiesc / Yasuaki Hiromasa / Xuekui Yu / Wong Hoi Hui / Xinghong Dai / Thomas E Roche / Z Hong Zhou /
Abstract: Pyruvate dehydrogenase complex (PDC) is a large multienzyme complex that catalyzes the irreversible conversion of pyruvate to acetyl-coenzyme A with reduction of NAD. Distinctive from PDCs in lower ...Pyruvate dehydrogenase complex (PDC) is a large multienzyme complex that catalyzes the irreversible conversion of pyruvate to acetyl-coenzyme A with reduction of NAD. Distinctive from PDCs in lower forms of life, in mammalian PDC, dihydrolipoyl acetyltransferase (E2; E2p in PDC) and dihydrolipoamide dehydrogenase binding protein (E3BP) combine to form a complex that plays a central role in the organization, regulation, and integration of catalytic reactions of PDC. However, the atomic structure and organization of the mammalian E2p/E3BP heterocomplex are unknown. Here, we report the structure of the recombinant dodecahedral core formed by the C-terminal inner-core/catalytic (IC) domain of human E2p determined at 3.1 Å resolution by cryo electron microscopy (cryoEM). The structure of the N-terminal fragment and four other surface areas of the human E2p IC domain exhibit significant differences from those of the other E2 crystal structures, which may have implications for the integration of E3BP in mammals. This structure also allowed us to obtain a homology model for the highly homologous IC domain of E3BP. Analysis of the interactions of human E2p or E3BP with their adjacent IC domains in the dodecahedron provides new insights into the organization of the E2p/E3BP heterocomplex and suggests a potential contribution by E3BP to catalysis in mammalian PDC.
History
DepositionMar 21, 2018Deposition site: RCSB / Processing site: RCSB
Revision 1.0Apr 18, 2018Provider: repository / Type: Initial release
Revision 1.1May 9, 2018Group: Data collection / Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.2Nov 27, 2019Group: Author supporting evidence / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.3Dec 18, 2019Group: Other / Category: atom_sites
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][3]
Revision 1.4Mar 13, 2024Group: Data collection / Database references / Derived calculations
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_struct_oper_list
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_struct_oper_list.name / _pdbx_struct_oper_list.symmetry_operation / _pdbx_struct_oper_list.type

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Structure visualization

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  • Biological unit as complete icosahedral assembly
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  • Biological unit as icosahedral pentamer
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  • Biological unit as icosahedral 23 hexamer
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  • Deposited structure unit
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  • Simplified surface model + fitted atomic model
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Assembly

Deposited unit
0: Dihydrolipoyllysine-residue acetyltransferase component of pyruvate dehydrogenase complex, mitochondrial


Theoretical massNumber of molelcules
Total (without water)69,0691
Polymers69,0691
Non-polymers00
Water0
1
0: Dihydrolipoyllysine-residue acetyltransferase component of pyruvate dehydrogenase complex, mitochondrial
x 60


Theoretical massNumber of molelcules
Total (without water)4,144,16460
Polymers4,144,16460
Non-polymers00
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
point symmetry operation59
2


  • Idetical with deposited unit
  • icosahedral asymmetric unit
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
3
0: Dihydrolipoyllysine-residue acetyltransferase component of pyruvate dehydrogenase complex, mitochondrial
x 5


  • icosahedral pentamer
  • 345 kDa, 5 polymers
Theoretical massNumber of molelcules
Total (without water)345,3475
Polymers345,3475
Non-polymers00
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
point symmetry operation4
4
0: Dihydrolipoyllysine-residue acetyltransferase component of pyruvate dehydrogenase complex, mitochondrial
x 6


  • icosahedral 23 hexamer
  • 414 kDa, 6 polymers
Theoretical massNumber of molelcules
Total (without water)414,4166
Polymers414,4166
Non-polymers00
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
point symmetry operation5
5


  • Idetical with deposited unit in distinct coordinate
  • icosahedral asymmetric unit, std point frame
TypeNameSymmetry operationNumber
transform to point frame1
SymmetryPoint symmetry: (Schoenflies symbol: I (icosahedral))

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Components

#1: Protein Dihydrolipoyllysine-residue acetyltransferase component of pyruvate dehydrogenase complex, mitochondrial / Dihydrolipoyl transacetylase / 70 kDa mitochondrial autoantigen of primary biliary cirrhosis / PBC / Dihydrolipoamide ...70 kDa mitochondrial autoantigen of primary biliary cirrhosis / PBC / Dihydrolipoamide acetyltransferase component of pyruvate dehydrogenase complex / M2 antigen complex 70 kDa subunit / Pyruvate dehydrogenase complex component E2 / PDCE2


Mass: 69069.398 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: DLAT, DLTA / Production host: Escherichia coli (E. coli)
References: UniProt: P10515, dihydrolipoyllysine-residue acetyltransferase

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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: E2 Inner Core of Human Pyruvate Dehydrogenase Complex / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.2
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: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingAverage exposure time: 8 sec. / Electron dose: 38 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

EM software
IDNameCategory
4CTFFINDCTF correction
10RELIONinitial Euler assignment
11RELIONfinal Euler assignment
12RELIONclassification
13RELION3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 49374 / Symmetry type: POINT

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