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- PDB-8gh2: Structure of Trypanosoma (MDH)4-(Pex5)2, close conformation -

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Basic information

Entry
Database: PDB / ID: 8gh2
TitleStructure of Trypanosoma (MDH)4-(Pex5)2, close conformation
Components
  • Peroxisome targeting signal 1 receptor
  • malate dehydrogenase
KeywordsTRANSPORT PROTEIN / Peroxisomal transport / Trypanosoma / Import / PEX
Function / homology
Function and homology information


peroxisome matrix targeting signal-1 binding / protein import into peroxisome matrix, docking / malate dehydrogenase / L-malate dehydrogenase (NAD+) activity / carboxylic acid metabolic process / peroxisomal membrane / tricarboxylic acid cycle / cytoplasm / cytosol
Similarity search - Function
PEX5/PEX5L / Malate dehydrogenase, type 1 / Tetratricopeptide repeat / L-lactate/malate dehydrogenase / Lactate/malate dehydrogenase, N-terminal / Lactate/malate dehydrogenase, C-terminal / lactate/malate dehydrogenase, NAD binding domain / lactate/malate dehydrogenase, alpha/beta C-terminal domain / Lactate dehydrogenase/glycoside hydrolase, family 4, C-terminal / TPR repeat region circular profile. ...PEX5/PEX5L / Malate dehydrogenase, type 1 / Tetratricopeptide repeat / L-lactate/malate dehydrogenase / Lactate/malate dehydrogenase, N-terminal / Lactate/malate dehydrogenase, C-terminal / lactate/malate dehydrogenase, NAD binding domain / lactate/malate dehydrogenase, alpha/beta C-terminal domain / Lactate dehydrogenase/glycoside hydrolase, family 4, C-terminal / TPR repeat region circular profile. / TPR repeat profile. / Tetratricopeptide repeats / Tetratricopeptide repeat / Tetratricopeptide-like helical domain superfamily / NAD(P)-binding domain superfamily
Similarity search - Domain/homology
malate dehydrogenase / Peroxisome targeting signal 1 receptor
Similarity search - Component
Biological speciesTrypanosoma cruzi strain CL Brener (eukaryote)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.66 Å
AuthorsSonani, R.R. / Artur, B. / Jemiola-Rzeminska, M. / Lipinski, O. / Patel, S.N. / Sood, T. / Dubin, G.
Funding support Poland, 3items
OrganizationGrant numberCountry
Polish National Science Centre2017/26/M/NZ1/00797 Poland
Foundation for Polish ScienceTEAM TECH CORE FACILITY/2017-4/6 Poland
Polish National Science Centre2020/39/B/NZ1/01551 Poland
CitationJournal: Biorxiv / Year: 2023
Title: Noncanonical interactions and conformational dynamics in cargo-Pex5-Pex14 ternary complex for peroxisomal import
Authors: Sonani, R.R. / Blat, A. / Jemiola-Rzeminska, M. / Lipinski, O. / Patel, S.N. / Sood, T. / Dubin, G.
History
DepositionMar 9, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Mar 27, 2024Provider: repository / Type: Initial release
Revision 1.0Mar 27, 2024Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
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Revision 1.0Mar 27, 2024Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Oct 9, 2024Group: Data collection / Database references / Structure summary
Category: citation / citation_author ...citation / citation_author / em_admin / pdbx_entry_details
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.title / _citation.year / _em_admin.last_update
Revision 1.2Aug 20, 2025Group: Author supporting evidence / Data collection / Category: em_admin / pdbx_audit_support / Item: _em_admin.last_update
Revision 1.1Aug 20, 2025Data content type: EM metadata / Data content type: EM metadata / Group: Experimental summary / Data content type: EM metadata / Category: em_admin / Data content type: EM metadata / Item: _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: malate dehydrogenase
C: malate dehydrogenase
B: malate dehydrogenase
D: malate dehydrogenase
F: Peroxisome targeting signal 1 receptor
E: Peroxisome targeting signal 1 receptor


Theoretical massNumber of molelcules
Total (without water)284,9646
Polymers284,9646
Non-polymers00
Water00
1


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

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Components

#1: Protein
malate dehydrogenase


Mass: 34106.832 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Trypanosoma cruzi strain CL Brener (eukaryote)
Gene: Tc00.1047053506503.69 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q4DRD8
#2: Protein Peroxisome targeting signal 1 receptor


Mass: 74268.422 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Trypanosoma cruzi strain CL Brener (eukaryote)
Gene: TCDM_08436 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: V5B7T1
Has protein modificationN

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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: Complex of MDH-tetramer and PEX5 / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Trypanosoma cruzi strain CL Brener (eukaryote)
Source (recombinant)Organism: Escherichia coli BL21(DE3) (bacteria)
Buffer solutionpH: 7.5
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 FIELD / Nominal defocus max: 3000 nm / Nominal defocus min: 900 nm
Image recordingElectron dose: 42.25 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.66 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 12276 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00214200
ELECTRON MICROSCOPYf_angle_d0.65919319
ELECTRON MICROSCOPYf_dihedral_angle_d4.8951985
ELECTRON MICROSCOPYf_chiral_restr0.0432273
ELECTRON MICROSCOPYf_plane_restr0.0062521

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