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- PDB-8uva: M. tuberculosis CTP synthase bound to inhibitor GSK735826A -

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Basic information

Entry
Database: PDB / ID: 8uva
TitleM. tuberculosis CTP synthase bound to inhibitor GSK735826A
ComponentsCTP synthase
KeywordsLIGASE / metabolic enzyme
Function / homology
Function and homology information


CTP synthase (glutamine hydrolysing) / CTP synthase activity / 'de novo' CTP biosynthetic process / pyrimidine nucleobase biosynthetic process / ATP binding / metal ion binding / identical protein binding / cytosol
Similarity search - Function
CTP synthase / CTP synthase, N-terminal / CTP synthase GATase domain / CTP synthase N-terminus / Glutamine amidotransferase / Glutamine amidotransferase class-I / Glutamine amidotransferase type 1 domain profile. / Class I glutamine amidotransferase-like / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
GLUTAMINE / URIDINE 5'-TRIPHOSPHATE / : / CTP synthase
Similarity search - Component
Biological speciesMycobacterium tuberculosis (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.8 Å
AuthorsLynch, E.M. / Kollman, J.M.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)R01 AI153048 United States
CitationJournal: To Be Published
Title: M. tuberculosis CTP synthase bound to inhibitor GSK735826A
Authors: Lynch, E.M. / Kollman, J.M.
History
DepositionNov 2, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 2, 2025Provider: repository / Type: Initial release
Revision 1.0Jul 2, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Jul 2, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jul 2, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jul 2, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Jul 2, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: CTP synthase
B: CTP synthase
C: CTP synthase
D: CTP synthase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)262,20720
Polymers258,1714
Non-polymers4,03616
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
CTP synthase


Mass: 64542.797 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mycobacterium tuberculosis (bacteria) / Gene: pyrG / Production host: Escherichia coli (E. coli) / References: UniProt: A0A045H225
#2: Chemical
ChemComp-GLN / GLUTAMINE


Type: L-peptide linking / Mass: 146.144 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C5H10N2O3
#3: Chemical
ChemComp-XMW / N-[(4M)-4-(pyridin-2-yl)-1,3-thiazol-2-yl]-2H-[1,3]dioxolo[4,5-f][1,3]benzothiazol-6-amine


Mass: 354.406 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C16H10N4O2S2 / Feature type: SUBJECT OF INVESTIGATION
#4: Chemical
ChemComp-UTP / URIDINE 5'-TRIPHOSPHATE


Mass: 484.141 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C9H15N2O15P3 / Comment: UTP*YM
#5: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Mg
Has ligand of interestY
Has protein modificationN

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Experimental details

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Experiment

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

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Sample preparation

ComponentName: CTP synthase / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Mycobacterium tuberculosis (bacteria)
Source (recombinant)Organism: Escherichia coli (E. coli)
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: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 500 nm
Image recordingElectron dose: 65 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM software
IDNameCategoryFitting-ID
2Leginonimage acquisition
4cryoSPARCCTF correction
7UCSF Chimeramodel fitting1
11ISOLDEmodel refinement1
13PHENIXmodel refinement2
14cryoSPARCinitial Euler assignment
16cryoSPARCfinal Euler assignment
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: D2 (2x2 fold dihedral)
3D reconstructionResolution: 2.8 Å / Resolution method: FSC 0.5 CUT-OFF / Num. of particles: 178988 / Symmetry type: POINT
Atomic model building
IDProtocol
1FLEXIBLE FIT
2FLEXIBLE FIT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00617024
ELECTRON MICROSCOPYf_angle_d0.76223196
ELECTRON MICROSCOPYf_dihedral_angle_d12.3256192
ELECTRON MICROSCOPYf_chiral_restr0.052608
ELECTRON MICROSCOPYf_plane_restr0.0093036

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