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- PDB-6p2s: Structure of a nested set of N-terminally extended MHC I-peptides... -

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Basic information

Entry
Database: PDB / ID: 6p2s
TitleStructure of a nested set of N-terminally extended MHC I-peptides provide novel insights into antigen processing and presentation
Components
  • Beta-2-microglobulin
  • MHC I-peptide
  • MHC class I antigen
KeywordsIMMUNE SYSTEM / MHC I antigen processing / MHC I antigen presentation / MHC I structure / MHC I immunopeptide
Function / homology
Function and homology information


regulation of interleukin-12 production / regulation of dendritic cell differentiation / regulation of T cell anergy / regulation of interleukin-6 production / TAP binding / protection from natural killer cell mediated cytotoxicity / antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-independent / antigen processing and presentation of endogenous peptide antigen via MHC class Ib / detection of bacterium / secretory granule membrane ...regulation of interleukin-12 production / regulation of dendritic cell differentiation / regulation of T cell anergy / regulation of interleukin-6 production / TAP binding / protection from natural killer cell mediated cytotoxicity / antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-independent / antigen processing and presentation of endogenous peptide antigen via MHC class Ib / detection of bacterium / secretory granule membrane / negative regulation of receptor binding / early endosome lumen / Nef mediated downregulation of MHC class I complex cell surface expression / DAP12 interactions / transferrin transport / cellular response to iron ion / lumenal side of endoplasmic reticulum membrane / Endosomal/Vacuolar pathway / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / peptide antigen assembly with MHC class II protein complex / cellular response to iron(III) ion / MHC class II protein complex / negative regulation of forebrain neuron differentiation / antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent / ER to Golgi transport vesicle membrane / peptide antigen assembly with MHC class I protein complex / regulation of iron ion transport / regulation of erythrocyte differentiation / HFE-transferrin receptor complex / response to molecule of bacterial origin / MHC class I peptide loading complex / defense response / T cell mediated cytotoxicity / positive regulation of T cell cytokine production / antigen processing and presentation of endogenous peptide antigen via MHC class I / antigen processing and presentation of exogenous peptide antigen via MHC class II / positive regulation of immune response / MHC class I protein complex / positive regulation of T cell activation / peptide antigen binding / positive regulation of receptor-mediated endocytosis / negative regulation of neurogenesis / cellular response to nicotine / positive regulation of T cell mediated cytotoxicity / multicellular organismal-level iron ion homeostasis / specific granule lumen / phagocytic vesicle membrane / recycling endosome membrane / Interferon gamma signaling / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / negative regulation of epithelial cell proliferation / MHC class II protein complex binding / Interferon alpha/beta signaling / Modulation by Mtb of host immune system / late endosome membrane / sensory perception of smell / positive regulation of cellular senescence / tertiary granule lumen / DAP12 signaling / T cell differentiation in thymus / negative regulation of neuron projection development / protein-folding chaperone binding / ER-Phagosome pathway / protein refolding / early endosome membrane / protein homotetramerization / adaptive immune response / amyloid fibril formation / intracellular iron ion homeostasis / learning or memory / immune response / endoplasmic reticulum lumen / Amyloid fiber formation / signaling receptor binding / Golgi membrane / lysosomal membrane / innate immune response / external side of plasma membrane / focal adhesion / Neutrophil degranulation / SARS-CoV-2 activates/modulates innate and adaptive immune responses / structural molecule activity / cell surface / endoplasmic reticulum / Golgi apparatus / protein homodimerization activity / extracellular space / extracellular exosome / extracellular region / identical protein binding / membrane / plasma membrane / cytosol
Similarity search - Function
MHC class I, alpha chain, C-terminal / MHC_I C-terminus / MHC class I-like antigen recognition-like / Murine Class I Major Histocompatibility Complex, H2-DB; Chain A, domain 1 / MHC class I alpha chain, alpha1 alpha2 domains / Class I Histocompatibility antigen, domains alpha 1 and 2 / Beta-2-Microglobulin / : / MHC class I-like antigen recognition-like / MHC class I-like antigen recognition-like superfamily ...MHC class I, alpha chain, C-terminal / MHC_I C-terminus / MHC class I-like antigen recognition-like / Murine Class I Major Histocompatibility Complex, H2-DB; Chain A, domain 1 / MHC class I alpha chain, alpha1 alpha2 domains / Class I Histocompatibility antigen, domains alpha 1 and 2 / Beta-2-Microglobulin / : / MHC class I-like antigen recognition-like / MHC class I-like antigen recognition-like superfamily / MHC classes I/II-like antigen recognition protein / : / 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 / Immunoglobulin-like fold / Immunoglobulins / Immunoglobulin-like / Sandwich / 2-Layer Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
HLA class I histocompatibility antigen, B alpha chain / Beta-2-microglobulin / MHC class I antigen
Similarity search - Component
Biological speciesHomo sapiens (human)
Human immunodeficiency virus 1
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.65 Å
AuthorsLi, L. / Batliwala, M. / Bouvier, M.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI) United States
CitationJournal: J.Biol.Chem. / Year: 2019
Title: ERAP1 enzyme-mediated trimming and structural analyses of MHC I-bound precursor peptides yield novel insights into antigen processing and presentation.
Authors: Li, L. / Batliwala, M. / Bouvier, M.
History
DepositionMay 22, 2019Deposition site: RCSB / Processing site: RCSB
Revision 1.0Oct 16, 2019Provider: repository / Type: Initial release
Revision 1.1Oct 23, 2019Group: Data collection / Database references / Category: citation / citation_author
Item: _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed ..._citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID
Revision 1.2Dec 18, 2019Group: Author supporting evidence / Database references / Category: citation / pdbx_audit_support
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.title / _pdbx_audit_support.funding_organization
Revision 1.3Jul 29, 2020Group: Data collection / Structure summary / Category: chem_comp / pdbx_chem_comp_identifier
Item: _chem_comp.mon_nstd_flag / _chem_comp.name / _chem_comp.type
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.0Mar 1, 2023Group: Advisory / Data collection ...Advisory / Data collection / Database references / Non-polymer description / Polymer sequence / Source and taxonomy / Structure summary
Category: chem_comp / database_2 ...chem_comp / database_2 / entity / entity_name_com / entity_poly / entity_poly_seq / entity_src_gen / pdbx_chem_comp_identifier / pdbx_poly_seq_scheme / pdbx_unobs_or_zero_occ_residues / struct_ref / struct_ref_seq / struct_ref_seq_dif
Item: _chem_comp.formula / _chem_comp.formula_weight ..._chem_comp.formula / _chem_comp.formula_weight / _chem_comp.id / _chem_comp.mon_nstd_flag / _chem_comp.name / _chem_comp.type / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _entity.formula_weight / _entity.pdbx_description / _entity_poly.pdbx_seq_one_letter_code / _entity_poly.pdbx_seq_one_letter_code_can / _entity_poly_seq.mon_id / _entity_src_gen.gene_src_common_name / _entity_src_gen.pdbx_gene_src_gene / _pdbx_poly_seq_scheme.mon_id / _pdbx_unobs_or_zero_occ_residues.auth_comp_id / _pdbx_unobs_or_zero_occ_residues.label_comp_id / _struct_ref.db_code / _struct_ref.pdbx_db_accession / _struct_ref_seq.pdbx_db_accession / _struct_ref_seq_dif.pdbx_seq_db_accession_code
Revision 2.1Oct 25, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model
Revision 2.2Oct 16, 2024Group: Structure summary / Category: pdbx_entry_details / pdbx_modification_feature

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: MHC class I antigen
B: Beta-2-microglobulin
C: MHC I-peptide


Theoretical massNumber of molelcules
Total (without water)45,0223
Polymers45,0223
Non-polymers00
Water4,378243
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area4430 Å2
ΔGint-23 kcal/mol
Surface area18580 Å2
MethodPISA
Unit cell
Length a, b, c (Å)50.550, 80.910, 108.710
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 MHC class I antigen


Mass: 31902.004 Da / Num. of mol.: 1 / Fragment: UNP residues 25-300 / Mutation: E76C
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: HLA-B / Production host: Escherichia coli (E. coli) / References: UniProt: R4ZGR5, UniProt: P01889*PLUS
#2: Protein Beta-2-microglobulin


Mass: 11879.356 Da / Num. of mol.: 1 / Fragment: UNP residues 21-119
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: B2M, CDABP0092, HDCMA22P / Production host: Escherichia coli (E. coli) / References: UniProt: P61769
#3: Protein/peptide MHC I-peptide


Mass: 1240.561 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Human immunodeficiency virus 1
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 243 / 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: 2.47 Å3/Da / Density % sol: 50.28 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop
Details: 0.2 M ammonium sulfate, 18% PEG4000, 0.1 M sodium cacodylate, pH 5.7

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Data collection

DiffractionMean temperature: 80 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 21-ID-F / Wavelength: 0.97872 Å
DetectorType: MARMOSAIC 300 mm CCD / Detector: CCD / Date: Aug 16, 2018
RadiationMonochromator: diamond(111) / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.97872 Å / Relative weight: 1
ReflectionResolution: 1.65→64.91 Å / Num. obs: 51165 / % possible obs: 98.9 % / Redundancy: 5.7 % / Rmerge(I) obs: 0.072 / Net I/σ(I): 13.6
Reflection shellResolution: 1.65→1.69 Å / Num. unique obs: 4988 / CC1/2: 0.78

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Processing

Software
NameVersionClassification
REFMAC5.6.0117refinement
XDSdata reduction
XDSdata scaling
PHENIXphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB entry 1AGB

1agb


Resolution: 1.65→64.91 Å / Cor.coef. Fo:Fc: 0.961 / Cor.coef. Fo:Fc free: 0.958 / SU B: 1.693 / SU ML: 0.056 / Cross valid method: THROUGHOUT / ESU R: 0.103 / ESU R Free: 0.093 / Details: HYDROGENS HAVE BEEN USED IF PRESENT IN THE INPUT
RfactorNum. reflection% reflectionSelection details
Rfree0.21396 2694 5 %RANDOM
Rwork0.20408 ---
obs0.20457 51165 98.94 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å
Displacement parametersBiso mean: 34.885 Å2
Baniso -1Baniso -2Baniso -3
1--0.01 Å20 Å20 Å2
2--0 Å20 Å2
3---0 Å2
Refinement stepCycle: 1 / Resolution: 1.65→64.91 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3147 0 0 243 3390
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0320.023235
X-RAY DIFFRACTIONr_bond_other_d
X-RAY DIFFRACTIONr_angle_refined_deg2.2071.9334392
X-RAY DIFFRACTIONr_angle_other_deg
X-RAY DIFFRACTIONr_dihedral_angle_1_deg6.2325381
X-RAY DIFFRACTIONr_dihedral_angle_2_deg33.13623.333177
X-RAY DIFFRACTIONr_dihedral_angle_3_deg15.54415529
X-RAY DIFFRACTIONr_dihedral_angle_4_deg20.2291531
X-RAY DIFFRACTIONr_chiral_restr0.1970.2447
X-RAY DIFFRACTIONr_gen_planes_refined0.0140.0212559
X-RAY DIFFRACTIONr_gen_planes_other
X-RAY DIFFRACTIONr_nbd_refined
X-RAY DIFFRACTIONr_nbd_other
X-RAY DIFFRACTIONr_nbtor_refined
X-RAY DIFFRACTIONr_nbtor_other
X-RAY DIFFRACTIONr_xyhbond_nbd_refined
X-RAY DIFFRACTIONr_xyhbond_nbd_other
X-RAY DIFFRACTIONr_metal_ion_refined
X-RAY DIFFRACTIONr_metal_ion_other
X-RAY DIFFRACTIONr_symmetry_vdw_refined
X-RAY DIFFRACTIONr_symmetry_vdw_other
X-RAY DIFFRACTIONr_symmetry_hbond_refined
X-RAY DIFFRACTIONr_symmetry_hbond_other
X-RAY DIFFRACTIONr_symmetry_metal_ion_refined
X-RAY DIFFRACTIONr_symmetry_metal_ion_other
X-RAY DIFFRACTIONr_mcbond_it
X-RAY DIFFRACTIONr_mcbond_other
X-RAY DIFFRACTIONr_mcangle_it
X-RAY DIFFRACTIONr_mcangle_other
X-RAY DIFFRACTIONr_scbond_it
X-RAY DIFFRACTIONr_scbond_other
X-RAY DIFFRACTIONr_scangle_it
X-RAY DIFFRACTIONr_scangle_other
X-RAY DIFFRACTIONr_long_range_B_refined
X-RAY DIFFRACTIONr_long_range_B_other
X-RAY DIFFRACTIONr_rigid_bond_restr
X-RAY DIFFRACTIONr_sphericity_free
X-RAY DIFFRACTIONr_sphericity_bonded
LS refinement shellResolution: 1.65→1.693 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.447 170 -
Rwork0.435 3260 -
obs--90.55 %

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