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- PDB-6pyj: Crystal Structure of HLA-B*2705 in complex with LRN, a self-peptide -

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Basic information

Entry
Database: PDB / ID: 6pyj
TitleCrystal Structure of HLA-B*2705 in complex with LRN, a self-peptide
Components
  • Beta-2-microglobulin
  • HLA class I histocompatibility antigen, B-27 alpha chain
  • LRN peptide
KeywordsIMMUNE SYSTEM / Ankylosing spondylitis / HLA-B27 / HLA-B*27:03 / HLA-B*27:05 / HLA
Function / homology
Function and homology information


squalene synthase / farnesyl diphosphate metabolic process / squalene synthase [NAD(P)H] activity / Cholesterol biosynthesis / steroid biosynthetic process / regulation of interleukin-12 production / regulation of dendritic cell differentiation / regulation of T cell anergy / regulation of interleukin-6 production / cholesterol biosynthetic process ...squalene synthase / farnesyl diphosphate metabolic process / squalene synthase [NAD(P)H] activity / Cholesterol biosynthesis / steroid biosynthetic process / regulation of interleukin-12 production / regulation of dendritic cell differentiation / regulation of T cell anergy / regulation of interleukin-6 production / cholesterol biosynthetic process / TAP binding / protection from natural killer cell mediated cytotoxicity / antigen processing and presentation of endogenous peptide antigen via MHC class Ib / antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-independent / detection of bacterium / Activation of gene expression by SREBF (SREBP) / negative regulation of receptor binding / secretory granule membrane / early endosome lumen / Nef mediated downregulation of MHC class I complex cell surface expression / DAP12 interactions / transferrin transport / cellular response to iron ion / Endosomal/Vacuolar pathway / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / peptide antigen assembly with MHC class II protein complex / lumenal side of endoplasmic reticulum membrane / 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 / defense response / response to molecule of bacterial origin / MHC class I peptide loading complex / PPARA activates gene expression / 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 / amyloid fibril formation / adaptive immune response / intracellular iron ion homeostasis / learning or memory / immune response / endoplasmic reticulum lumen / Amyloid fiber formation / signaling receptor binding / Golgi membrane / innate immune response / lysosomal membrane / external side of plasma membrane / focal adhesion / Neutrophil degranulation / endoplasmic reticulum membrane / 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 / metal ion binding / identical protein binding
Similarity search - Function
Squalene synthase-like / Trans-isoprenyl diphosphate synthases, eukaryotic-type / Squalene and phytoene synthases signature 2. / Squalene/phytoene synthase, conserved site / Squalene and phytoene synthases signature 1. / Trans-isoprenyl diphosphate synthases, head-to-head / Squalene/phytoene synthase / Squalene/phytoene synthase / Isoprenoid synthase domain superfamily / MHC class I, alpha chain, C-terminal ...Squalene synthase-like / Trans-isoprenyl diphosphate synthases, eukaryotic-type / Squalene and phytoene synthases signature 2. / Squalene/phytoene synthase, conserved site / Squalene and phytoene synthases signature 1. / Trans-isoprenyl diphosphate synthases, head-to-head / Squalene/phytoene synthase / Squalene/phytoene synthase / Isoprenoid synthase domain 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-B27 / HLA class I histocompatibility antigen, B alpha chain / Squalene synthase / Beta-2-microglobulin
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / molecular replacement / Resolution: 1.44 Å
AuthorsGras, S.
CitationJournal: J.Biol.Chem. / Year: 2019
Title: Allelic association with ankylosing spondylitis fails to correlate with human leukocyte antigen B27 homodimer formation.
Authors: Lim Kam Sian, T.C.C. / Indumathy, S. / Halim, H. / Greule, A. / Cryle, M.J. / Bowness, P. / Rossjohn, J. / Gras, S. / Purcell, A.W. / Schittenhelm, R.B.
History
DepositionJul 30, 2019Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 4, 2019Provider: repository / Type: Initial release
Revision 1.1Jan 8, 2020Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.2Oct 11, 2023Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 1.3Nov 20, 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: HLA class I histocompatibility antigen, B-27 alpha chain
B: Beta-2-microglobulin
C: LRN peptide


Theoretical massNumber of molelcules
Total (without water)44,8023
Polymers44,8023
Non-polymers00
Water7,638424
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area4330 Å2
ΔGint-16 kcal/mol
Surface area19250 Å2
MethodPISA
Unit cell
Length a, b, c (Å)50.780, 82.704, 104.979
Angle α, β, γ (deg.)90.000, 90.000, 90.000
Int Tables number19
Space group name H-MP212121

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Components

#1: Protein HLA class I histocompatibility antigen, B-27 alpha chain / MHC class I antigen B*27


Mass: 31928.160 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: HLA-B, HLAB / Plasmid: pET30 / Production host: Escherichia coli BL21 (bacteria) / References: UniProt: P03989, UniProt: A0A583ZBQ2*PLUS
#2: Protein Beta-2-microglobulin


Mass: 11748.160 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: B2M, CDABP0092, HDCMA22P / Plasmid: pET30 / Production host: Escherichia coli BL21 (bacteria) / References: UniProt: P61769
#3: Protein/peptide LRN peptide


Mass: 1125.257 Da / Num. of mol.: 1 / Source method: obtained synthetically / Details: synthesized / Source: (synth.) Homo sapiens (human) / References: UniProt: P37268*PLUS
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 424 / 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: 2.46 Å3/Da / Density % sol: 50 % / Mosaicity: 0.22 °
Crystal growTemperature: 277 K / Method: vapor diffusion, hanging drop / pH: 5.6
Details: 20-30% PEG 4K, 0.2M Na Acetate and 0.1M Na Citrate pH 5.6

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Data collection

DiffractionMean temperature: 100 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: Australian Synchrotron / Beamline: MX2 / Wavelength: 0.954 Å
DetectorType: ADSC QUANTUM 315r / Detector: CCD / Date: Aug 14, 2015
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.954 Å / Relative weight: 1
ReflectionResolution: 1.44→45.71 Å / Num. obs: 80761 / % possible obs: 100 % / Redundancy: 7.3 % / Biso Wilson estimate: 14.69 Å2 / CC1/2: 0.999 / Rmerge(I) obs: 0.09 / Net I/σ(I): 16.8 / Num. measured all: 586220
Reflection shell

Diffraction-ID: 1

Resolution (Å)Redundancy (%)Rmerge(I) obsNum. measured allNum. unique obsCC1/2Net I/σ(I) obs% possible all
1.44-1.4671.0392769239370.5972.199.9
7.89-45.715.90.02533455710.99960.897.9

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Phasing

PhasingMethod: molecular replacement

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Processing

Software
NameVersionClassificationNB
XDSdata reduction
Aimless0.3.11data scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACT3.25data extraction
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 4g9d

4g9d


Resolution: 1.44→28.8 Å / Cor.coef. Fo:Fc: 0.921 / Cor.coef. Fo:Fc free: 0.911 / SU R Cruickshank DPI: 0.068 / Cross valid method: THROUGHOUT / σ(F): 0 / SU R Blow DPI: 0.072 / SU Rfree Blow DPI: 0.07 / SU Rfree Cruickshank DPI: 0.067
RfactorNum. reflection% reflectionSelection details
Rfree0.22 3955 4.9 %RANDOM
Rwork0.202 ---
obs0.203 80678 100 %-
Displacement parametersBiso max: 90.91 Å2 / Biso mean: 17.97 Å2 / Biso min: 5.42 Å2
Baniso -1Baniso -2Baniso -3
1-1.6577 Å20 Å20 Å2
2--1.4446 Å20 Å2
3----3.1023 Å2
Refine analyzeLuzzati coordinate error obs: 0.22 Å
Refinement stepCycle: final / Resolution: 1.44→28.8 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3161 0 0 425 3586
Biso mean---24.79 -
Num. residues----384
LS refinement shellResolution: 1.44→1.48 Å / Rfactor Rfree error: 0 / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.2535 266 4.52 %
Rwork0.2209 5625 -
all0.2224 5891 -
obs--99.93 %

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