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- EMDB-37952: Human erythrocyte catalase with SLS as additive during cryo-EM gr... -

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Basic information

Entry
Database: EMDB / ID: EMD-37952
TitleHuman erythrocyte catalase with SLS as additive during cryo-EM grid preparation
Map dataRelion sharpened full map
Sample
  • Complex: Catalase purified from human erythrocytes
    • Protein or peptide: Catalase
  • Ligand: PROTOPORPHYRIN IX CONTAINING FE
  • Ligand: NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
KeywordsCatalase / Oxidoreductase / heme / NADP
Function / homology
Function and homology information


response to phenylpropanoid / aminoacylase activity / catalase complex / hemoglobin metabolic process / response to inactivity / cellular detoxification of hydrogen peroxide / response to L-ascorbic acid / response to ozone / oxidoreductase activity, acting on peroxide as acceptor / response to light intensity ...response to phenylpropanoid / aminoacylase activity / catalase complex / hemoglobin metabolic process / response to inactivity / cellular detoxification of hydrogen peroxide / response to L-ascorbic acid / response to ozone / oxidoreductase activity, acting on peroxide as acceptor / response to light intensity / catalase / UV protection / response to fatty acid / response to vitamin A / catalase activity / peroxisomal membrane / ureteric bud development / triglyceride metabolic process / Detoxification of Reactive Oxygen Species / antioxidant activity / peroxisomal matrix / positive regulation of cell division / response to vitamin E / response to hyperoxia / FOXO-mediated transcription of oxidative stress, metabolic and neuronal genes / response to cadmium ion / aerobic respiration / cholesterol metabolic process / response to activity / response to reactive oxygen species / hydrogen peroxide catabolic process / Peroxisomal protein import / response to lead ion / response to insulin / response to hydrogen peroxide / cellular response to growth factor stimulus / osteoblast differentiation / peroxisome / response to estradiol / NADP binding / secretory granule lumen / response to ethanol / ficolin-1-rich granule lumen / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / response to hypoxia / response to xenobiotic stimulus / intracellular membrane-bounded organelle / focal adhesion / heme binding / Neutrophil degranulation / negative regulation of apoptotic process / enzyme binding / protein homodimerization activity / protein-containing complex / mitochondrion / extracellular exosome / extracellular region / identical protein binding / membrane / metal ion binding / 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 active site / Catalase proximal active site signature. / Catalase immune-responsive domain / Catalase-related immune-responsive / 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 active site / Catalase proximal active site signature. / Catalase immune-responsive domain / Catalase-related immune-responsive / Catalase core domain / Catalase, mono-functional, haem-containing / Catalase / catalase family profile. / Catalase superfamily
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.7 Å
AuthorsYadav S / Vinothkumar KR
Funding support India, 2 items
OrganizationGrant numberCountry
Department of Biotechnology (DBT, India)DBT/PR12422/MED/31/287/2014 India
Other governmentRTI4006 India
CitationJournal: Acta Crystallogr D Struct Biol / Year: 2024
Title: Factors affecting macromolecule orientations in thin films formed in cryo-EM.
Authors: Swati Yadav / Kutti R Vinothkumar /
Abstract: The formation of a vitrified thin film embedded with randomly oriented macromolecules is an essential prerequisite for cryogenic sample electron microscopy. Most commonly, this is achieved using the ...The formation of a vitrified thin film embedded with randomly oriented macromolecules is an essential prerequisite for cryogenic sample electron microscopy. Most commonly, this is achieved using the plunge-freeze method first described nearly 40 years ago. Although this is a robust method, the behaviour of different macromolecules shows great variation upon freezing and often needs to be optimized to obtain an isotropic, high-resolution reconstruction. For a macromolecule in such a film, the probability of encountering the air-water interface in the time between blotting and freezing and adopting preferred orientations is very high. 3D reconstruction using preferentially oriented particles often leads to anisotropic and uninterpretable maps. Currently, there are no general solutions to this prevalent issue, but several approaches largely focusing on sample preparation with the use of additives and novel grid modifications have been attempted. In this study, the effect of physical and chemical factors on the orientations of macromolecules was investigated through an analysis of selected well studied macromolecules, and important parameters that determine the behaviour of proteins on cryo-EM grids were revealed. These insights highlight the nature of the interactions that cause preferred orientations and can be utilized to systematically address orientation bias for any given macromolecule and to provide a framework to design small-molecule additives to enhance sample stability and behaviour.
History
DepositionNov 1, 2023-
Header (metadata) releaseJul 10, 2024-
Map releaseJul 10, 2024-
UpdateJul 10, 2024-
Current statusJul 10, 2024Processing site: PDBj / Status: Released

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Structure visualization

Downloads & links

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Map

FileDownload / File: emd_37952.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationRelion sharpened full map
Voxel sizeX=Y=Z: 1.07 Å
Density
Contour LevelBy AUTHOR: 0.045
Minimum - Maximum-0.0961462 - 0.18736279
Average (Standard dev.)-0.0000022153426 (±0.0073102103)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 273.92 Å
α=β=γ: 90.0 °

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Supplemental data

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Sample components

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Entire : Catalase purified from human erythrocytes

EntireName: Catalase purified from human erythrocytes
Components
  • Complex: Catalase purified from human erythrocytes
    • Protein or peptide: Catalase
  • Ligand: PROTOPORPHYRIN IX CONTAINING FE
  • Ligand: NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE

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Supramolecule #1: Catalase purified from human erythrocytes

SupramoleculeName: Catalase purified from human erythrocytes / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 238 KDa

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Macromolecule #1: Catalase

MacromoleculeName: Catalase / type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO / EC number: catalase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 59.836996 KDa
SequenceString: MADSRDPASD QMQHWKEQRA AQKADVLTTG AGNPVGDKLN VITVGPRGPL LVQDVVFTDE MAHFDRERIP ERVVHAKGAG AFGYFEVTH DITKYSKAKV FEHIGKKTPI AVRFSTVAGE SGSADTVRDP RGFAVKFYTE DGNWDLVGNN TPIFFIRDPI L FPSFIHSQ ...String:
MADSRDPASD QMQHWKEQRA AQKADVLTTG AGNPVGDKLN VITVGPRGPL LVQDVVFTDE MAHFDRERIP ERVVHAKGAG AFGYFEVTH DITKYSKAKV FEHIGKKTPI AVRFSTVAGE SGSADTVRDP RGFAVKFYTE DGNWDLVGNN TPIFFIRDPI L FPSFIHSQ KRNPQTHLKD PDMVWDFWSL RPESLHQVSF LFSDRGIPDG HRHMNGYGSH TFKLVNANGE AVYCKFHYKT DQ GIKNLSV EDAARLSQED PDYGIRDLFN AIATGKYPSW TFYIQVMTFN QAETFPFNPF DLTKVWPHKD YPLIPVGKLV LNR NPVNYF AEVEQIAFDP SNMPPGIEAS PDKMLQGRLF AYPDTHRHRL GPNYLHIPVN CPYRARVANY QRDGPMCMQD NQGG APNYY PNSFGAPEQQ PSALEHSIQY SGEVRRFNTA NDDNVTQVRA FYVNVLNEEQ RKRLCENIAG HLKDAQIFIQ KKAVK NFTE VHPDYGSHIQ ALLDKYNAEK PKNAIHTFVQ SGSHLAAREK ANL

UniProtKB: Catalase

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Macromolecule #2: PROTOPORPHYRIN IX CONTAINING FE

MacromoleculeName: PROTOPORPHYRIN IX CONTAINING FE / type: ligand / ID: 2 / Number of copies: 4 / Formula: HEM
Molecular weightTheoretical: 616.487 Da
Chemical component information

ChemComp-HEM:
PROTOPORPHYRIN IX CONTAINING FE

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Macromolecule #3: NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE

MacromoleculeName: NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
type: ligand / ID: 3 / Number of copies: 4 / Formula: NDP
Molecular weightTheoretical: 745.421 Da
Chemical component information

ChemComp-NDP:
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration3.4 mg/mL
BufferpH: 8 / Component:
ConcentrationName
50.0 mMTris
0.04 %SLS
GridModel: Quantifoil / Material: GOLD / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec. / Pretreatment - Atmosphere: AIR
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 293 K / Instrument: FEI VITROBOT MARK IV / Details: Blot force, 0.

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON III (4k x 4k) / Detector mode: COUNTING / Digitization - Dimensions - Width: 4096 pixel / Digitization - Dimensions - Height: 4096 pixel / Number grids imaged: 1 / Average exposure time: 60.0 sec. / Average electron dose: 33.0 e/Å2
Details: Images were collected in movie mode at 40 frames per second. Total of 25 frames were saved for each movie.
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Calibrated magnification: 130841 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 3.0 µm / Nominal defocus min: 1.8 µm / Nominal magnification: 75000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: INSILICO MODEL
Final reconstructionNumber classes used: 1 / Applied symmetry - Point group: D2 (2x2 fold dihedral) / Algorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1) / Number images used: 33241
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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Atomic model buiding 1

Initial modelPDB ID:

1dgf


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementSpace: RECIPROCAL / Protocol: OTHER / Overall B value: 151.4
Output model

PDB-8wzh:
Human erythrocyte catalase with SLS as additive during cryo-EM grid preparation

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