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- PDB-7vd9: 2.29 A structure of the human catalase -

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Basic information

Entry
Database: PDB / ID: 7vd9
Title2.29 A structure of the human catalase
ComponentsCatalase
KeywordsSTRUCTURAL PROTEIN / Catalase
Function / homology
Function and homology information


response to amitrole / response to phenylpropanoid / aminoacylase activity / catalase complex / hemoglobin metabolic process / response to inactivity / cellular detoxification of hydrogen peroxide / response to ozone / oxidoreductase activity, acting on peroxide as acceptor / catalase ...response to amitrole / response to phenylpropanoid / aminoacylase activity / catalase complex / hemoglobin metabolic process / response to inactivity / cellular detoxification of hydrogen peroxide / response to ozone / oxidoreductase activity, acting on peroxide as acceptor / catalase / response to L-ascorbic acid / response to fatty acid / UV protection / response to light intensity / catalase activity / response to vitamin A / peroxisomal membrane / ureteric bud development / triglyceride metabolic process / response to vitamin E / Detoxification of Reactive Oxygen Species / antioxidant activity / peroxisomal matrix / positive regulation of cell division / response to hyperoxia / Mitochondrial unfolded protein response (UPRmt) / response to cadmium ion / FOXO-mediated transcription of oxidative stress, metabolic and neuronal genes / cholesterol metabolic process / aerobic respiration / response to reactive oxygen species / response to activity / hydrogen peroxide catabolic process / Peroxisomal protein import / response to hydrogen peroxide / response to insulin / cellular response to growth factor stimulus / response to lead ion / osteoblast differentiation / peroxisome / response to estradiol / NADP binding / response to ethanol / secretory granule lumen / ficolin-1-rich granule lumen / response to hypoxia / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / response to xenobiotic stimulus / focal adhesion / intracellular membrane-bounded organelle / heme binding / Neutrophil degranulation / negative regulation of apoptotic process / enzyme binding / protein homodimerization activity / protein-containing complex / mitochondrion / extracellular exosome / extracellular region / metal ion binding / identical protein binding / membrane / cytoplasm / cytosol
Similarity search - Function
Catalase, clade 3 / Catalase, mono-functional, haem-containing, clades 1 and 3 / Catalase haem-binding site / Catalase proximal heme-ligand signature. / Catalase / Catalase immune-responsive domain / Catalase-related immune-responsive / Catalase active site / Catalase proximal active site signature. / Catalase core domain ...Catalase, clade 3 / Catalase, mono-functional, haem-containing, clades 1 and 3 / Catalase haem-binding site / Catalase proximal heme-ligand signature. / Catalase / Catalase immune-responsive domain / Catalase-related immune-responsive / Catalase active site / Catalase proximal active site signature. / Catalase core domain / Catalase, mono-functional, haem-containing / Catalase / catalase family profile. / Catalase superfamily
Similarity search - Domain/homology
PROTOPORPHYRIN IX CONTAINING FE / Chem-NDP / Catalase
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.29 Å
AuthorsFan, H.C. / Zhang, Y. / Sun, F.
Funding support China, 5items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China)2017YFA0504700 China
National Natural Science Foundation of China (NSFC)31830020 China
Chinese Academy of SciencesXDB37040102 China
National Natural Science Foundation of China (NSFC)31925026 China
Ministry of Science and Technology (MoST, China)2015DFG32140 China
CitationJournal: Nat Commun / Year: 2021
Title: A cryo-electron microscopy support film formed by 2D crystals of hydrophobin HFBI.
Authors: Hongcheng Fan / Bo Wang / Yan Zhang / Yun Zhu / Bo Song / Haijin Xu / Yujia Zhai / Mingqiang Qiao / Fei Sun /
Abstract: Cryo-electron microscopy (cryo-EM) has become a powerful tool to resolve high-resolution structures of biomacromolecules in solution. However, air-water interface induced preferred orientations, ...Cryo-electron microscopy (cryo-EM) has become a powerful tool to resolve high-resolution structures of biomacromolecules in solution. However, air-water interface induced preferred orientations, dissociation or denaturation of biomacromolecules during cryo-vitrification remains a limiting factor for many specimens. To solve this bottleneck, we developed a cryo-EM support film using 2D crystals of hydrophobin HFBI. The hydrophilic side of the HFBI film adsorbs protein particles via electrostatic interactions and sequesters them from the air-water interface, allowing the formation of sufficiently thin ice for high-quality data collection. The particle orientation distribution can be regulated by adjusting the buffer pH. Using this support, we determined the cryo-EM structures of catalase (2.29 Å) and influenza haemagglutinin trimer (2.56 Å), which exhibited strong preferred orientations using a conventional cryo-vitrification protocol. We further show that the HFBI film is suitable to obtain high-resolution structures of small proteins, including aldolase (150 kDa, 3.28 Å) and haemoglobin (64 kDa, 3.6 Å). Our work suggests that HFBI films may have broad future applications in increasing the success rate and efficiency of cryo-EM.
History
DepositionSep 6, 2021Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Dec 29, 2021Provider: repository / Type: Initial release
Revision 1.0Dec 29, 2021Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Dec 29, 2021Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Dec 29, 2021Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Dec 29, 2021Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Dec 29, 2021Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Dec 29, 2021Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Dec 29, 2021Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Dec 29, 2021Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Dec 29, 2021Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Dec 29, 2021Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Dec 29, 2021Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Jun 19, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond
Revision 1.2Jul 2, 2025Group: Data collection / Structure summary / Category: em_admin / em_software / pdbx_entry_details
Item: _em_admin.last_update / _em_software.name / _pdbx_entry_details.has_protein_modification
Revision 1.1Jul 2, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name

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Assembly

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


Theoretical massNumber of molelcules
Total (without water)244,79612
Polymers239,3484
Non-polymers5,4488
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area53620 Å2
ΔGint-312 kcal/mol
Surface area61210 Å2

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Components

#1: Protein
Catalase


Mass: 59836.996 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P04040, catalase
#2: Chemical
ChemComp-HEM / PROTOPORPHYRIN IX CONTAINING FE / HEME


Mass: 616.487 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C34H32FeN4O4 / Feature type: SUBJECT OF INVESTIGATION
#3: Chemical
ChemComp-NDP / NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE


Mass: 745.421 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C21H30N7O17P3 / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
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: Human catalase / Type: COMPLEX / Entity ID: #1 / Source: NATURAL
Molecular weightValue: 0.24 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
Buffer solutionpH: 6.5
Buffer componentConc.: 50 mM / Formula: Tris-HCl
SpecimenConc.: 2.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: NICKEL/TITANIUM / Grid mesh size: 300 divisions/in.
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: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 215000 X
Image recordingElectron dose: 60 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Num. of real images: 3214
Image scansMovie frames/image: 40

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Processing

SoftwareName: PHENIX / Version: dev_4206: / Classification: refinement
EM software
IDNameVersionCategory
1Topazparticle selection
2SerialEMimage acquisition
4Gctf1.06CTF correction
9PHENIXmodel refinement
10RELION3.1initial Euler assignment
11RELION3.1final Euler assignment
12RELION3.1classification
13RELION3.13D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 653922
SymmetryPoint symmetry: D2 (2x2 fold dihedral)
3D reconstructionResolution: 2.29 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 195077 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00216954
ELECTRON MICROSCOPYf_angle_d0.54123136
ELECTRON MICROSCOPYf_dihedral_angle_d7.1282271
ELECTRON MICROSCOPYf_chiral_restr0.0422335
ELECTRON MICROSCOPYf_plane_restr0.0053071

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