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- PDB-2h8a: Structure of Microsomal Glutathione Transferase 1 in Complex with... -

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Basic information

Entry
Database: PDB / ID: 2h8a
TitleStructure of Microsomal Glutathione Transferase 1 in Complex with Glutathione
ComponentsMicrosomal glutathione S-transferase 1
KeywordsTRANSFERASE / Membrane protein
Function / homology
Function and homology information


cellular response to lipid hydroperoxide / Aflatoxin activation and detoxification / glutathione transport / Glutathione conjugation / glutathione binding / Leydig cell differentiation / glutathione peroxidase activity / peroxisomal membrane / Neutrophil degranulation / glutathione transferase ...cellular response to lipid hydroperoxide / Aflatoxin activation and detoxification / glutathione transport / Glutathione conjugation / glutathione binding / Leydig cell differentiation / glutathione peroxidase activity / peroxisomal membrane / Neutrophil degranulation / glutathione transferase / glutathione transferase activity / : / glutathione metabolic process / apical part of cell / mitochondrial outer membrane / response to lipopolysaccharide / response to xenobiotic stimulus / endoplasmic reticulum membrane / endoplasmic reticulum / mitochondrion / identical protein binding / membrane
Similarity search - Function
Microsomal glutathione S-transferase 1-like / Membrane associated eicosanoid/glutathione metabolism-like domain / Membrane-associated, eicosanoid/glutathione metabolism (MAPEG) protein / Membrane associated eicosanoid/glutathione metabolism-like domain superfamily / MAPEG family / Four Helix Bundle (Hemerythrin (Met), subunit A) / Up-down Bundle / Mainly Alpha
Similarity search - Domain/homology
GLUTATHIONE / Microsomal glutathione S-transferase 1
Similarity search - Component
Biological speciesRattus norvegicus (Norway rat)
MethodELECTRON CRYSTALLOGRAPHY / electron crystallography / cryo EM / Resolution: 3.2 Å
AuthorsHebert, H.
CitationJournal: J Mol Biol / Year: 2006
Title: Structural basis for detoxification and oxidative stress protection in membranes.
Authors: Peter J Holm / Priyaranjan Bhakat / Caroline Jegerschöld / Nobuhiko Gyobu / Kaoru Mitsuoka / Yoshinori Fujiyoshi / Ralf Morgenstern / Hans Hebert /
Abstract: Synthesis of mediators of fever, pain and inflammation as well as protection against reactive molecules and oxidative stress is a hallmark of the MAPEG superfamily (membrane associated proteins in ...Synthesis of mediators of fever, pain and inflammation as well as protection against reactive molecules and oxidative stress is a hallmark of the MAPEG superfamily (membrane associated proteins in eicosanoid and glutathione metabolism). The structure of a MAPEG member, rat microsomal glutathione transferase 1, at 3.2 A resolution, solved here in complex with glutathione by electron crystallography, defines the active site location and a cytosolic domain involved in enzyme activation. The glutathione binding site is found to be different from that of the canonical soluble glutathione transferases. The architecture of the homotrimer supports a catalytic mechanism involving subunit interactions and reveals both cytosolic and membraneous substrate entry sites, providing a rationale for the membrane location of the enzyme.
History
DepositionJun 7, 2006Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 22, 2007Provider: repository / Type: Initial release
Revision 1.1May 1, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Derived calculations / Version format compliance
Revision 1.3Jan 18, 2012Group: Non-polymer description
Revision 1.4Mar 21, 2012Group: Non-polymer description
Revision 1.5Feb 14, 2024Group: Author supporting evidence / Data collection ...Author supporting evidence / Data collection / Database references / Derived calculations
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_image_scans / em_single_particle_entity / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id

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Assembly

Deposited unit
A: Microsomal glutathione S-transferase 1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)17,6692
Polymers17,3611
Non-polymers3071
Water00
1
A: Microsomal glutathione S-transferase 1
hetero molecules

A: Microsomal glutathione S-transferase 1
hetero molecules

A: Microsomal glutathione S-transferase 1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)53,0066
Polymers52,0843
Non-polymers9223
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation2_565-y,x-y+1,z1
crystal symmetry operation3_455-x+y-1,-x,z1
Buried area7340 Å2
ΔGint-51 kcal/mol
Surface area18560 Å2
MethodPISA, PQS
Unit cell
Length a, b, c (Å)81.800, 81.800, 100.000
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number168
Space group name H-MP6

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Components

#1: Protein Microsomal glutathione S-transferase 1 / Microsomal GST- 1 / Microsomal GST-I


Mass: 17361.289 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Rattus norvegicus (Norway rat) / References: UniProt: P08011, glutathione transferase
#2: Chemical ChemComp-GSH / GLUTATHIONE


Mass: 307.323 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H17N3O6S

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Experimental details

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Experiment

ExperimentMethod: ELECTRON CRYSTALLOGRAPHY
EM experimentAggregation state: 2D ARRAY / 3D reconstruction method: electron crystallography

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Sample preparation

ComponentName: Microsomal Glutathione Transferase 1 in Complex with Glutathione
Type: COMPLEX / Details: Embedded in trehalose
Buffer solutionName: potassium phosphate / pH: 8 / Details: potassium phosphate
SpecimenConc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportDetails: Carbon coated Mo-grids

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Data collection

MicroscopyModel: JEOL 3000SFF / Details: Electron diffraction at 1.2 m camera length
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 60000 X / Nominal defocus max: 2000 nm / Nominal defocus min: 300 nm / Cs: 1.6 mm
Specimen holderTemperature: 4 K / Tilt angle max: 62.6 ° / Tilt angle min: 0 °
Image recordingElectron dose: 10 e/Å2
Details: Kodak SO163 film for images, CCD for electron diffraction patterns
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: electron
Radiation wavelengthRelative weight: 1

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Processing

SoftwareName: REFMAC / Version: 5.2.0005 / Classification: refinement
CTF correctionDetails: Crystallographic
3D reconstructionMethod: Crystallographic / Resolution: 3.2 Å / Nominal pixel size: 1.17 Å
Magnification calibration: Gold electron diffraction to establish exact unit cell parameters
Symmetry type: 2D CRYSTAL
RefinementResolution: 3.2→10 Å / Cor.coef. Fo:Fc: 0.619 / Cor.coef. Fo:Fc free: 0.356 / SU B: 29.134 / SU ML: 0.54 / Cross valid method: THROUGHOUT / ESU R: 1.747 / ESU R Free: 0.635 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflectionSelection details
Rfree0.37628 457 9.4 %RANDOM
Rwork0.33894 ---
obs0.34237 4409 79.25 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
Displacement parametersBiso mean: 26.662 Å2
Baniso -1Baniso -2Baniso -3
1--2.58 Å2-1.29 Å20 Å2
2---2.58 Å20 Å2
3---3.88 Å2
Refinement stepCycle: LAST / Resolution: 3.2→10 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms964 0 20 0 984
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
ELECTRON CRYSTALLOGRAPHYr_bond_refined_d0.0130.0221004
ELECTRON CRYSTALLOGRAPHYr_bond_other_d
ELECTRON CRYSTALLOGRAPHYr_angle_refined_deg1.8631.991358
ELECTRON CRYSTALLOGRAPHYr_angle_other_deg
ELECTRON CRYSTALLOGRAPHYr_dihedral_angle_1_deg9.8555119
ELECTRON CRYSTALLOGRAPHYr_dihedral_angle_2_deg36.93621.2241
ELECTRON CRYSTALLOGRAPHYr_dihedral_angle_3_deg26.2315165
ELECTRON CRYSTALLOGRAPHYr_dihedral_angle_4_deg16.716159
ELECTRON CRYSTALLOGRAPHYr_chiral_restr0.120.2159
ELECTRON CRYSTALLOGRAPHYr_gen_planes_refined0.0060.02742
ELECTRON CRYSTALLOGRAPHYr_gen_planes_other
ELECTRON CRYSTALLOGRAPHYr_nbd_refined0.3630.2806
ELECTRON CRYSTALLOGRAPHYr_nbd_other
ELECTRON CRYSTALLOGRAPHYr_nbtor_refined0.3360.2672
ELECTRON CRYSTALLOGRAPHYr_nbtor_other
ELECTRON CRYSTALLOGRAPHYr_xyhbond_nbd_refined0.2670.291
ELECTRON CRYSTALLOGRAPHYr_xyhbond_nbd_other
ELECTRON CRYSTALLOGRAPHYr_metal_ion_refined
ELECTRON CRYSTALLOGRAPHYr_metal_ion_other
ELECTRON CRYSTALLOGRAPHYr_symmetry_vdw_refined0.4140.269
ELECTRON CRYSTALLOGRAPHYr_symmetry_vdw_other
ELECTRON CRYSTALLOGRAPHYr_symmetry_hbond_refined0.3750.26
ELECTRON CRYSTALLOGRAPHYr_symmetry_hbond_other
ELECTRON CRYSTALLOGRAPHYr_symmetry_metal_ion_refined
ELECTRON CRYSTALLOGRAPHYr_symmetry_metal_ion_other
ELECTRON CRYSTALLOGRAPHYr_mcbond_it0.5291.5610
ELECTRON CRYSTALLOGRAPHYr_mcbond_other
ELECTRON CRYSTALLOGRAPHYr_mcangle_it0.9812970
ELECTRON CRYSTALLOGRAPHYr_scbond_it1.1313431
ELECTRON CRYSTALLOGRAPHYr_scangle_it1.6664.5388
ELECTRON CRYSTALLOGRAPHYr_rigid_bond_restr
ELECTRON CRYSTALLOGRAPHYr_sphericity_free
ELECTRON CRYSTALLOGRAPHYr_sphericity_bonded
LS refinement shellResolution: 3.2→3.274 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.398 29 -
Rwork0.314 262 -
obs--64.52 %

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