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- PDB-1lo5: Crystal structure of the D227A variant of Staphylococcal enteroto... -

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Basic information

Entry
Database: PDB / ID: 1lo5
TitleCrystal structure of the D227A variant of Staphylococcal enterotoxin A in complex with human MHC class II
Components
  • HLA class II histocompatibility antigen, DR alpha chain
  • HLA class II histocompatibility antigen, DR-1 beta chain
  • Hemagglutinin peptide
  • enterotoxin A
KeywordsIMMUNE SYSTEM/Toxin / PROTEIN-PROTEIN COMPLEX / IMMUNE SYSTEM-Toxin COMPLEX
Function / homology
Function and homology information


regulation of interleukin-4 production / regulation of interleukin-10 production / myeloid dendritic cell antigen processing and presentation / antigen processing and presentation of endogenous peptide antigen via MHC class II / autolysosome membrane / regulation of T-helper cell differentiation / positive regulation of CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation / MHC class II receptor activity / positive regulation of CD4-positive, alpha-beta T cell activation / MHC class II protein binding ...regulation of interleukin-4 production / regulation of interleukin-10 production / myeloid dendritic cell antigen processing and presentation / antigen processing and presentation of endogenous peptide antigen via MHC class II / autolysosome membrane / regulation of T-helper cell differentiation / positive regulation of CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation / MHC class II receptor activity / positive regulation of CD4-positive, alpha-beta T cell activation / MHC class II protein binding / antigen processing and presentation of peptide or polysaccharide antigen via MHC class II / positive regulation of T cell mediated immune response to tumor cell / positive regulation of kinase activity / positive regulation of memory T cell differentiation / positive regulation of monocyte differentiation / inflammatory response to antigenic stimulus / CD4 receptor binding / intermediate filament / T-helper 1 type immune response / transport vesicle membrane / Translocation of ZAP-70 to Immunological synapse / Phosphorylation of CD3 and TCR zeta chains / polysaccharide binding / negative regulation of type II interferon production / humoral immune response / macrophage differentiation / Generation of second messenger molecules / immunological synapse / Co-inhibition by PD-1 / epidermis development / positive regulation of insulin secretion involved in cellular response to glucose stimulus / detection of bacterium / T cell receptor binding / negative regulation of T cell proliferation / MHC class II antigen presentation / trans-Golgi network membrane / lumenal side of endoplasmic reticulum membrane / protein tetramerization / peptide antigen assembly with MHC class II protein complex / negative regulation of inflammatory response to antigenic stimulus / MHC class II protein complex / clathrin-coated endocytic vesicle membrane / ER to Golgi transport vesicle membrane / antigen processing and presentation of exogenous peptide antigen via MHC class II / positive regulation of immune response / positive regulation of T cell activation / peptide antigen binding / structural constituent of cytoskeleton / positive regulation of T cell mediated cytotoxicity / cognition / positive regulation of protein phosphorylation / Interferon gamma signaling / MHC class II protein complex binding / endocytic vesicle membrane / late endosome membrane / Downstream TCR signaling / T cell receptor signaling pathway / toxin activity / early endosome membrane / adaptive immune response / positive regulation of viral entry into host cell / positive regulation of ERK1 and ERK2 cascade / lysosome / positive regulation of canonical NF-kappaB signal transduction / positive regulation of MAPK cascade / immune response / Golgi membrane / lysosomal membrane / external side of plasma membrane / positive regulation of DNA-templated transcription / cell surface / signal transduction / extracellular space / extracellular exosome / extracellular region / metal ion binding / membrane / plasma membrane
Similarity search - Function
Staphylococcal enterotoxin/Streptococcal pyrogenic exotoxin signature 1. / Staphylococcal/streptococcal toxin, bacterial / Staphylococcal/Streptococcal toxin, OB-fold / Staphylococcal/Streptococcal toxin, OB-fold domain / Staphylococcal enterotoxin/Streptococcal pyrogenic exotoxin, conserved site / Staphyloccocal enterotoxin/Streptococcal pyrogenic exotoxin signature 2. / Ubiquitin-like (UB roll) - #120 / Superantigen, staphylococcal/streptococcal toxin, bacterial / Staphylococcal/Streptococcal toxin, beta-grasp domain / Staphylococcal/Streptococcal toxin, beta-grasp domain ...Staphylococcal enterotoxin/Streptococcal pyrogenic exotoxin signature 1. / Staphylococcal/streptococcal toxin, bacterial / Staphylococcal/Streptococcal toxin, OB-fold / Staphylococcal/Streptococcal toxin, OB-fold domain / Staphylococcal enterotoxin/Streptococcal pyrogenic exotoxin, conserved site / Staphyloccocal enterotoxin/Streptococcal pyrogenic exotoxin signature 2. / Ubiquitin-like (UB roll) - #120 / Superantigen, staphylococcal/streptococcal toxin, bacterial / Staphylococcal/Streptococcal toxin, beta-grasp domain / Staphylococcal/Streptococcal toxin, beta-grasp domain / Superantigen toxin, C-terminal / Class II Histocompatibility Antigen, M Beta Chain; Chain B, domain 1 / Class II Histocompatibility Antigen, M Beta Chain; Chain B, domain 1 / OB fold (Dihydrolipoamide Acetyltransferase, E2P) - #110 / MHC class II, beta chain, N-terminal / Class II histocompatibility antigen, beta domain / Class II histocompatibility antigen, beta domain / MHC class II, alpha chain, N-terminal / Class II histocompatibility antigen, alpha domain / Class II histocompatibility antigen, alpha domain / MHC class II, alpha/beta chain, N-terminal / Enterotoxin / MHC classes I/II-like antigen recognition protein / : / Ubiquitin-like (UB roll) / OB fold (Dihydrolipoamide Acetyltransferase, E2P) / Immunoglobulin/major histocompatibility complex, conserved site / Immunoglobulins and major histocompatibility complex proteins signature. / Immunoglobulin C-Type / Immunoglobulin C1-set / Immunoglobulin C1-set domain / Ig-like domain profile. / Immunoglobulin-like domain / Immunoglobulin-like domain superfamily / Roll / Immunoglobulin-like fold / Immunoglobulins / Beta Barrel / Immunoglobulin-like / Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
HLA class II histocompatibility antigen, DR alpha chain / HLA class II histocompatibility antigen, DRB1 beta chain / HLA class II histocompatibility antigen, DRB1 beta chain / Enterotoxin type A
Similarity search - Component
Biological speciesHomo sapiens (human)
Staphylococcus aureus (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 3.2 Å
AuthorsPetersson, K. / Thunnissen, M. / Forsberg, G. / Walse, B.
CitationJournal: Structure / Year: 2002
Title: Crystal Structure of a SEA Variant in Complex with MHC Class II Reveals the Ability of SEA to Crosslink MHC Molecules
Authors: Petersson, K. / Thunnissen, M. / Forsberg, G. / Walse, B.
History
DepositionMay 6, 2002Deposition site: RCSB / Processing site: PDBJ
Revision 1.0Dec 18, 2002Provider: repository / Type: Initial release
Revision 1.1Apr 28, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3May 23, 2018Group: Data collection / Category: diffrn_source / Item: _diffrn_source.pdbx_synchrotron_site
Revision 1.4Nov 10, 2021Group: Database references / Category: database_2 / struct_ref_seq_dif
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_ref_seq_dif.details
Revision 1.5Oct 25, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model
Revision 1.6Oct 9, 2024Group: Structure summary / Category: pdbx_entry_details / pdbx_modification_feature

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: HLA class II histocompatibility antigen, DR alpha chain
B: HLA class II histocompatibility antigen, DR-1 beta chain
C: Hemagglutinin peptide
D: enterotoxin A


Theoretical massNumber of molelcules
Total (without water)71,8304
Polymers71,8304
Non-polymers00
Water41423
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)52.008, 75.792, 198.082
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121

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Components

#1: Protein HLA class II histocompatibility antigen, DR alpha chain / MHC class II (HLA-DR1 / Dra 0101)-chain A


Mass: 21155.904 Da / Num. of mol.: 1 / Fragment: extracellular domain
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Plasmid: pLM1 / Production host: Escherichia coli (E. coli) / References: UniProt: P01903
#2: Protein HLA class II histocompatibility antigen, DR-1 beta chain / MHC class II (HLA-DR1 / Drb1 0101)-chain B


Mass: 22080.664 Da / Num. of mol.: 1 / Fragment: extracellular domain
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Plasmid: pLM1 / Production host: Escherichia coli (E. coli) / References: UniProt: P04229, UniProt: P01911*PLUS
#3: Protein/peptide Hemagglutinin peptide


Mass: 1506.807 Da / Num. of mol.: 1 / Source method: obtained synthetically
Details: this sequence is Peptide from influenza virus, hemagglutinin peptide
#4: Protein enterotoxin A


Mass: 27086.295 Da / Num. of mol.: 1 / Mutation: D227A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Staphylococcus aureus (bacteria) / Plasmid: pLR16 / Gene (production host): K12 / Production host: Escherichia coli (E. coli) / Strain (production host): UL635 / References: UniProt: P0A0L2
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 23 / Source method: isolated from a natural source / Formula: H2O
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.72 Å3/Da / Density % sol: 54.72 %
Crystal growTemperature: 291 K / Method: vapor diffusion, hanging drop / pH: 6.5
Details: 0.2M (NH4)2SO4, 0.1M MES, 24%(w/v) polyethylen glycol monomethyl ether 5000, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K
Crystal grow
*PLUS
Method: vapor diffusion
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDChemical formulaDetails
14.5 mg/mlprotein1drop
21 mM1dropZnCl2
30.2 Mammonium sulfate1reservoir
40.1 MMES1reservoir
524 %(w/v)PEG50001reservoirpH6.5

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: MAX II / Beamline: I711 / Wavelength: 1.076 Å
DetectorType: MARRESEARCH / Detector: CCD / Date: Feb 13, 2002
RadiationMonochromator: Si 111 monochromator / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.076 Å / Relative weight: 1
ReflectionResolution: 3.2→30 Å / Num. all: 12279 / Num. obs: 12279 / % possible obs: 91.6 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 3.1 % / Biso Wilson estimate: 46.2 Å2 / Rmerge(I) obs: 0.101 / Rsym value: 0.101 / Net I/σ(I): 6.4
Reflection shellResolution: 3.2→3.37 Å / Redundancy: 2.8 % / Rmerge(I) obs: 0.246 / Mean I/σ(I) obs: 3.1 / Num. unique all: 4777 / Rsym value: 0.246 / % possible all: 87.9
Reflection
*PLUS
Lowest resolution: 30 Å / Num. obs: 38082
Reflection shell
*PLUS
% possible obs: 87.9 % / Num. unique obs: 4777

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Processing

Software
NameVersionClassification
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing
CNS1refinement
CCP4(SCALA)data scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB entry: 1esf and 1dlh

1esf

1dlh


Resolution: 3.2→30 Å / Rfactor Rfree error: 0.011 / Data cutoff high absF: 1275926.28 / Data cutoff low absF: 0 / Isotropic thermal model: isotropic / Cross valid method: THROUGHOUT / σ(F): 0 / σ(I): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.339 1003 8.2 %RANDOM
Rwork0.245 ---
obs0.245 12279 93.9 %-
all-12279 --
Solvent computationSolvent model: FLAT MODEL / Bsol: 45.3971 Å2 / ksol: 0.347189 e/Å3
Displacement parametersBiso mean: 43.2 Å2
Baniso -1Baniso -2Baniso -3
1--1.55 Å20 Å20 Å2
2---11.8 Å20 Å2
3---13.34 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.6 Å0.39 Å
Luzzati d res low-5 Å
Luzzati sigma a0.73 Å0.46 Å
Refinement stepCycle: LAST / Resolution: 3.2→30 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms5032 0 0 23 5055
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.009
X-RAY DIFFRACTIONc_angle_deg1.6
X-RAY DIFFRACTIONc_dihedral_angle_d25.5
X-RAY DIFFRACTIONc_improper_angle_d0.98
LS refinement shellResolution: 3.2→3.4 Å / Rfactor Rfree error: 0.033 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.417 155 8.1 %
Rwork0.316 1769 -
obs--87.3 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2WATER.PARAM
Refinement
*PLUS
Highest resolution: 3.2 Å / Lowest resolution: 30 Å / % reflection Rfree: 8 %
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_angle_deg1.59
X-RAY DIFFRACTIONc_dihedral_angle_d
X-RAY DIFFRACTIONc_dihedral_angle_deg25.5
X-RAY DIFFRACTIONc_improper_angle_d
X-RAY DIFFRACTIONc_improper_angle_deg0.98
LS refinement shell
*PLUS
Highest resolution: 3.2 Å / Lowest resolution: 3.37 Å

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