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- PDB-9hkz: Cryo-EM structure of Pseudomonas aeruginosa tetrameric S-adenosyl... -

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Basic information

Entry
Database: PDB / ID: 9hkz
TitleCryo-EM structure of Pseudomonas aeruginosa tetrameric S-adenosyl-L-homocysteine hydrolase with 2 wide open, 1 open and 1 closed subunits
ComponentsAdenosylhomocysteinase
KeywordsHYDROLASE / SAM-DEPENDENT METHYLATION / PROTEIN DYNAMICS / CRYOEM
Function / homology
Function and homology information


L-homocysteine biosynthetic process / adenosylhomocysteinase / adenosylhomocysteinase activity / S-adenosylmethionine cycle / one-carbon metabolic process / cytosol
Similarity search - Function
Adenosylhomocysteinase-like / S-adenosyl-L-homocysteine hydrolase, conserved site / Adenosylhomocysteinase-like superfamily / S-adenosyl-L-homocysteine hydrolase, NAD binding domain / S-adenosyl-L-homocysteine hydrolase / S-adenosyl-L-homocysteine hydrolase signature 1. / S-adenosyl-L-homocysteine hydrolase signature 2. / S-adenosyl-L-homocysteine hydrolase / S-adenosyl-L-homocysteine hydrolase, NAD binding domain / S-adenosyl-L-homocysteine hydrolase, NAD binding domain / NAD(P)-binding domain superfamily
Similarity search - Domain/homology
ADENOSINE / NICOTINAMIDE-ADENINE-DINUCLEOTIDE / Adenosylhomocysteinase
Similarity search - Component
Biological speciesPseudomonas aeruginosa (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsMalecki, P.H. / Wozniak, K. / Ruszkowski, M. / Brzezinski, K.
Funding support Poland, 1items
OrganizationGrant numberCountry
Polish National Science CentreSONATA BIS 2018/30/E/NZ1/00729 Poland
Citation
Journal: To Be Published
Title: Cryo-EM structure of Pseudomonas aeruginosa tetrameric S-adenosyl-L-homocysteine hydrolase with 2 wide open, 1 open and 1 closed subunits
Authors: Malecki, P.H. / Wozniak, K. / Ruszkowski, M. / Brzezinski, K.
#1: Journal: Acta Crystallogr D Struct Biol / Year: 2019
Title: Macromolecular structure determination using X-rays, neutrons and electrons: recent developments in Phenix.
Authors: Dorothee Liebschner / Pavel V Afonine / Matthew L Baker / Gábor Bunkóczi / Vincent B Chen / Tristan I Croll / Bradley Hintze / Li Wei Hung / Swati Jain / Airlie J McCoy / Nigel W Moriarty ...Authors: Dorothee Liebschner / Pavel V Afonine / Matthew L Baker / Gábor Bunkóczi / Vincent B Chen / Tristan I Croll / Bradley Hintze / Li Wei Hung / Swati Jain / Airlie J McCoy / Nigel W Moriarty / Robert D Oeffner / Billy K Poon / Michael G Prisant / Randy J Read / Jane S Richardson / David C Richardson / Massimo D Sammito / Oleg V Sobolev / Duncan H Stockwell / Thomas C Terwilliger / Alexandre G Urzhumtsev / Lizbeth L Videau / Christopher J Williams / Paul D Adams /
Abstract: Diffraction (X-ray, neutron and electron) and electron cryo-microscopy are powerful methods to determine three-dimensional macromolecular structures, which are required to understand biological ...Diffraction (X-ray, neutron and electron) and electron cryo-microscopy are powerful methods to determine three-dimensional macromolecular structures, which are required to understand biological processes and to develop new therapeutics against diseases. The overall structure-solution workflow is similar for these techniques, but nuances exist because the properties of the reduced experimental data are different. Software tools for structure determination should therefore be tailored for each method. Phenix is a comprehensive software package for macromolecular structure determination that handles data from any of these techniques. Tasks performed with Phenix include data-quality assessment, map improvement, model building, the validation/rebuilding/refinement cycle and deposition. Each tool caters to the type of experimental data. The design of Phenix emphasizes the automation of procedures, where possible, to minimize repetitive and time-consuming manual tasks, while default parameters are chosen to encourage best practice. A graphical user interface provides access to many command-line features of Phenix and streamlines the transition between programs, project tracking and re-running of previous tasks.
History
DepositionDec 4, 2024Deposition site: PDBE / Processing site: PDBE
Revision 1.0Feb 19, 2025Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Adenosylhomocysteinase
B: Adenosylhomocysteinase
C: Adenosylhomocysteinase
D: Adenosylhomocysteinase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)209,8619
Polymers206,9404
Non-polymers2,9215
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
Adenosylhomocysteinase / S-adenosyl-L-homocysteine hydrolase / AdoHcyase


Mass: 51735.031 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Pseudomonas aeruginosa (bacteria) / Gene: ahcY, sahH, PA0432 / Production host: Escherichia coli (E. coli) / Strain (production host): BL21-Gold(DE3) / References: UniProt: Q9I685, adenosylhomocysteinase
#2: Chemical
ChemComp-NAD / NICOTINAMIDE-ADENINE-DINUCLEOTIDE


Mass: 663.425 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C21H27N7O14P2 / Comment: NAD*YM
#3: Chemical ChemComp-ADN / ADENOSINE


Mass: 267.241 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H13N5O4
Has ligand of interestN
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: S-adenosyl-L-homocysteine hydrolase / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightValue: 0.2 MDa / Experimental value: YES
Source (natural)Organism: Pseudomonas aeruginosa (bacteria) / Strain: PAO1
Source (recombinant)Organism: Escherichia coli (E. coli) / Strain: BL21-Gold(DE3)
Buffer solutionpH: 7.5
SpecimenConc.: 0.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen 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: 3500 nm / Nominal defocus min: 900 nm / Cs: 2.7 mm
Image recordingElectron dose: 40.44 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 6384

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Processing

EM softwareName: PHENIX / Version: 1.21.2_5419+SVN / Category: model refinement
CTF correctionType: NONE
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 172337 / Num. of class averages: 1 / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Space: REAL
Atomic model buildingPDB-ID: 8CFB

8cfb


Accession code: 8CFB / Source name: PDB / Type: experimental model
RefinementCross valid method: NONE

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