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- PDB-8kgy: Human glutamate dehydrogenase I -

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Basic information

Entry
Database: PDB / ID: 8kgy
TitleHuman glutamate dehydrogenase I
ComponentsGlutamate dehydrogenase 1, mitochondrial
KeywordsOXIDOREDUCTASE / dehydrogenase
Function / homology
Function and homology information


L-leucine binding / glutamate dehydrogenase [NAD(P)+] activity / glutamate catabolic process / tricarboxylic acid metabolic process / glutamate dehydrogenase [NAD(P)+] / glutamate biosynthetic process / glutamate dehydrogenase (NADP+) activity / Glutamate and glutamine metabolism / glutamate dehydrogenase (NAD+) activity / glutamine metabolic process ...L-leucine binding / glutamate dehydrogenase [NAD(P)+] activity / glutamate catabolic process / tricarboxylic acid metabolic process / glutamate dehydrogenase [NAD(P)+] / glutamate biosynthetic process / glutamate dehydrogenase (NADP+) activity / Glutamate and glutamine metabolism / glutamate dehydrogenase (NAD+) activity / glutamine metabolic process / NAD+ binding / Mitochondrial protein degradation / substantia nigra development / ADP binding / Transcriptional activation of mitochondrial biogenesis / positive regulation of insulin secretion / mitochondrial matrix / GTP binding / endoplasmic reticulum / protein homodimerization activity / mitochondrion / ATP binding / cytoplasm
Similarity search - Function
NAD(P) binding domain of glutamate dehydrogenase / Leu/Phe/Val dehydrogenases active site / Glu / Leu / Phe / Val dehydrogenases active site. / Glutamate/phenylalanine/leucine/valine dehydrogenase / Glutamate/phenylalanine/leucine/valine dehydrogenase, dimerisation domain / Glu/Leu/Phe/Val dehydrogenase, dimerisation domain / Glutamate/Leucine/Phenylalanine/Valine dehydrogenase / Glutamate/phenylalanine/leucine/valine dehydrogenase, C-terminal / Glutamate/Leucine/Phenylalanine/Valine dehydrogenase / Aminoacid dehydrogenase-like, N-terminal domain superfamily / NAD(P)-binding domain superfamily
Similarity search - Domain/homology
Glutamate dehydrogenase 1, mitochondrial
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.59 Å
AuthorsSu, M.-Y.
Funding support China, 1items
OrganizationGrant numberCountry
Other government2022A1515010856 China
CitationJournal: Structure / Year: 2023
Title: Cryo-EM structure of the KLHL22 E3 ligase bound to an oligomeric metabolic enzyme.
Authors: Fei Teng / Yang Wang / Ming Liu / Shuyun Tian / Goran Stjepanovic / Ming-Yuan Su /
Abstract: CULLIN-RING ligases constitute the largest group of E3 ubiquitin ligases. While some CULLIN family members recruit adapters before engaging further with different substrate receptors, homo-dimeric ...CULLIN-RING ligases constitute the largest group of E3 ubiquitin ligases. While some CULLIN family members recruit adapters before engaging further with different substrate receptors, homo-dimeric BTB-Kelch family proteins combine adapter and substrate receptor into a single polypeptide for the CULLIN3 family. However, the entire structural assembly and molecular details have not been elucidated to date. Here, we present a cryo-EM structure of the CULLIN3 in complex with Kelch-like protein 22 (KLHL22) and a mitochondrial glutamate dehydrogenase complex I (GDH1) at 3.06 Å resolution. The structure adopts a W-shaped architecture formed by E3 ligase dimers. Three CULLIN3 dimers were found to be dynamically associated with a single GDH1 hexamer. CULLIN3 ligase mediated the polyubiquitination of GDH1 in vitro. Together, these results enabled the establishment of a structural model for understanding the complete assembly of BTB-Kelch proteins with CULLIN3 and how together they recognize oligomeric substrates and target them for ubiquitination.
History
DepositionAug 20, 2023Deposition site: PDBJ / Processing site: PDBC
Revision 1.0Oct 25, 2023Provider: repository / Type: Initial release
Revision 1.1Nov 22, 2023Group: Database references / Category: citation / Item: _citation.journal_volume / _citation.page_first

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Glutamate dehydrogenase 1, mitochondrial
B: Glutamate dehydrogenase 1, mitochondrial
C: Glutamate dehydrogenase 1, mitochondrial
D: Glutamate dehydrogenase 1, mitochondrial
E: Glutamate dehydrogenase 1, mitochondrial
F: Glutamate dehydrogenase 1, mitochondrial


Theoretical massNumber of molelcules
Total (without water)368,8846
Polymers368,8846
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
Glutamate dehydrogenase 1, mitochondrial / GDH 1


Mass: 61480.746 Da / Num. of mol.: 6 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK Expi293F
References: UniProt: P00367, glutamate dehydrogenase [NAD(P)+]

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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 glutamate dehydrogenase I / Type: COMPLEX / Entity ID: all / Source: NATURAL
Molecular weightUnits: MEGADALTONS / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Buffer solutionpH: 7.4
Details: 20 mM HEPES pH 7.4, 200 mM NaCl, 2 mM MgCl2 and 0.5 mM TCEP
SpecimenConc.: 0.6 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: UltrAuFoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

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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: SPOT SCAN
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1900 nm / Nominal defocus min: 1100 nm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN
Image recordingElectron dose: 1.072 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM softwareName: SerialEM / Category: image acquisition
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: D3 (2x3 fold dihedral)
3D reconstructionResolution: 2.59 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 79181 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Atomic model buildingPDB-ID: 1L1F

1l1f


Accession code: 1L1F / Source name: PDB / Type: experimental model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00223234
ELECTRON MICROSCOPYf_angle_d0.45731336
ELECTRON MICROSCOPYf_dihedral_angle_d3.7183175
ELECTRON MICROSCOPYf_chiral_restr0.0413382
ELECTRON MICROSCOPYf_plane_restr0.0054086

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