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- PDB-9ueq: Cryo-EM structure of the CT-PT-BCCP domain of pyruvate carboxylas... -

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Basic information

Entry
Database: PDB / ID: 9ueq
TitleCryo-EM structure of the CT-PT-BCCP domain of pyruvate carboxylase from Mycobacterium tuberculosis
ComponentsPyruvate carboxylase
KeywordsLIGASE / Pyruvate Carboxylase / BCCP / CT / Mycobacterium tuberculosis
Function / homology
Function and homology information


pyruvate carboxylase / pyruvate carboxylase activity / biotin carboxylase activity / gluconeogenesis / ATP binding / metal ion binding
Similarity search - Function
: / Pyruvate carboxylase / Carboxylase, conserved domain / Conserved carboxylase domain / Pyruvate carboxyltransferase / HMGL-like / Pyruvate carboxyltransferase domain. / Biotin-binding site / Biotin-requiring enzymes attachment site. / Biotin carboxylase-like, N-terminal domain ...: / Pyruvate carboxylase / Carboxylase, conserved domain / Conserved carboxylase domain / Pyruvate carboxyltransferase / HMGL-like / Pyruvate carboxyltransferase domain. / Biotin-binding site / Biotin-requiring enzymes attachment site. / Biotin carboxylase-like, N-terminal domain / Biotin carboxylase, C-terminal / Biotin carboxylation domain / Biotin carboxylase, N-terminal domain / Biotin carboxylase C-terminal domain / Biotin carboxylation domain profile. / Biotin carboxylase C-terminal domain / Carbamoyl-phosphate synthetase large subunit-like, ATP-binding domain / Carbamoyl-phosphate synthase L chain, ATP binding domain / Biotin-requiring enzyme / Rudiment single hybrid motif / Biotinyl/lipoyl domain profile. / Biotin/lipoyl attachment / Single hybrid motif / Pre-ATP-grasp domain superfamily / ATP-grasp fold / ATP-grasp fold profile. / Aldolase-type TIM barrel / Carbamoyl-phosphate synthase subdomain signature 2.
Similarity search - Domain/homology
BIOTIN / Pyruvate carboxylase
Similarity search - Component
Biological speciesMycobacterium tuberculosis H37Rv (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsSingh, A. / Raza, M. / Singh, S. / Das, U.
Funding support India, 1items
OrganizationGrant numberCountry
Not funded India
CitationJournal: To Be Published
Title: Cryo-EM structure of Pyruvate carboxylase from Mycobacterium tuberculosis in complex with Acetyl-CoA and ADP
Authors: Singh, A. / Raza, M. / Singh, S. / Das, U.
History
DepositionApr 9, 2025Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0May 14, 2025Provider: repository / Type: Initial release
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Revision 2.0Nov 12, 2025Group: Advisory / Atomic model ...Advisory / Atomic model / Author supporting evidence / Data collection / Database references / Derived calculations / Non-polymer description / Polymer sequence / Refinement description / Source and taxonomy / Structure summary
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Description: Ligand identity / Details: Replaced with BTI / Provider: author / Type: Coordinate replacement
Revision 1.1Nov 12, 2025Data content type: EM metadata
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Item: _chem_comp.name / _em_admin.last_update ..._chem_comp.name / _em_admin.last_update / _em_admin.title / _entity_poly.pdbx_seq_one_letter_code / _entity_poly.pdbx_seq_one_letter_code_can / _entity_src_gen.pdbx_end_seq_num

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Pyruvate carboxylase
B: Pyruvate carboxylase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)143,6646
Polymers143,0442
Non-polymers6194
Water543
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Pyruvate carboxylase


Mass: 71522.039 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mycobacterium tuberculosis H37Rv (bacteria)
Gene: pca, Rv2967c / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: I6YEU0, pyruvate carboxylase
#2: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION
#3: Chemical ChemComp-BTN / BIOTIN


Mass: 244.311 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H16N2O3S / Feature type: SUBJECT OF INVESTIGATION
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 3 / Source method: isolated from a natural source / Formula: H2O
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: Pyruvate carboxylase CT and BCCP domain / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightValue: 0.482 MDa / Experimental value: YES
Source (natural)Organism: Mycobacterium tuberculosis H37Rv (bacteria)
Source (recombinant)Organism: Escherichia coli BL21(DE3) (bacteria)
Buffer solutionpH: 7
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/1
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: 2200 nm / Nominal defocus min: 800 nm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 1.04 sec. / Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of real images: 6780
EM imaging opticsEnergyfilter name: GIF Bioquantum / Energyfilter slit width: 20 eV

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Processing

EM software
IDNameVersionCategory
1Topazparticle selection
2EPUimage acquisition
7UCSF ChimeraXmodel fitting
9PHENIX1.21.2_5419model refinement
13cryoSPARC4.6.23D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 110575 / Symmetry type: POINT
Atomic model buildingProtocol: AB INITIO MODEL
Atomic model buildingPDB-ID: 9UBG

9ubg


Accession code: 9UBG / Source name: PDB / Type: experimental model
RefinementHighest resolution: 3.2 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00310239
ELECTRON MICROSCOPYf_angle_d0.4813962
ELECTRON MICROSCOPYf_dihedral_angle_d10.0063738
ELECTRON MICROSCOPYf_chiral_restr0.0411610
ELECTRON MICROSCOPYf_plane_restr0.0041848

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