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- PDB-1t1x: Structural basis for degenerate recognition of HIV peptide varian... -

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Basic information

Entry
Database: PDB / ID: 1t1x
TitleStructural basis for degenerate recognition of HIV peptide variants by cytotoxic lymphocyte, variant SL9-4L
Components
  • Beta-2-microglobulin
  • GAG PEPTIDE
  • HLA class I histocompatibility antigen, A-2 alpha chain
KeywordsIMMUNE SYSTEM / CTL / CYTOTOXIC T LYMPHOCYTES / HIV / HUMAN IMMUNODEFICIENCY VIRUS / MHC / MAJOR HISTOCOMPATIBILITY COMPLEX / PMHC / PEPTIDE MHC COMPLEX / RMSD / ROOT-MEAN-SQUARED DEVIATION / SIV / SIMIAN IMMUNODEFICIENCY VIRUS / TCR / T-CELL RECEPTOR
Function / homology
Function and homology information


: / : / regulation of membrane depolarization / retina homeostasis / positive regulation of memory T cell activation / T cell mediated cytotoxicity directed against tumor cell target / TAP complex binding / positive regulation of CD8-positive, alpha-beta T cell activation / CD8-positive, alpha-beta T cell activation / Golgi medial cisterna ...: / : / regulation of membrane depolarization / retina homeostasis / positive regulation of memory T cell activation / T cell mediated cytotoxicity directed against tumor cell target / TAP complex binding / positive regulation of CD8-positive, alpha-beta T cell activation / CD8-positive, alpha-beta T cell activation / Golgi medial cisterna / positive regulation of CD8-positive, alpha-beta T cell proliferation / CD8 receptor binding / antigen processing and presentation of exogenous peptide antigen via MHC class I / endoplasmic reticulum exit site / antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-dependent / TAP binding / protection from natural killer cell mediated cytotoxicity / beta-2-microglobulin binding / T cell receptor binding / detection of bacterium / positive regulation of ferrous iron binding / positive regulation of transferrin receptor binding / positive regulation of receptor binding / early endosome lumen / Nef mediated downregulation of MHC class I complex cell surface expression / negative regulation of receptor binding / DAP12 interactions / 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 / cellular response to iron ion / Endosomal/Vacuolar pathway / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / lumenal side of endoplasmic reticulum membrane / cellular response to iron(III) ion / antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent / negative regulation of forebrain neuron differentiation / regulation of erythrocyte differentiation / peptide antigen assembly with MHC class I protein complex / ER to Golgi transport vesicle membrane / regulation of iron ion transport / response to molecule of bacterial origin / MHC class I peptide loading complex / HFE-transferrin receptor complex / T cell mediated cytotoxicity / positive regulation of T cell cytokine production / antigen processing and presentation of endogenous peptide antigen via MHC class I / MHC class I protein complex / negative regulation of neurogenesis / positive regulation of receptor-mediated endocytosis / peptide antigen assembly with MHC class II protein complex / multicellular organismal-level iron ion homeostasis / MHC class II protein complex / cellular response to nicotine / specific granule lumen / positive regulation of cellular senescence / positive regulation of T cell mediated cytotoxicity / positive regulation of type II interferon production / recycling endosome membrane / phagocytic vesicle membrane / peptide antigen binding / antigen processing and presentation of exogenous peptide antigen via MHC class II / negative regulation of epithelial cell proliferation / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / positive regulation of immune response / Interferon gamma signaling / Modulation by Mtb of host immune system / positive regulation of T cell activation / antimicrobial humoral immune response mediated by antimicrobial peptide / Interferon alpha/beta signaling / sensory perception of smell / negative regulation of neuron projection development / positive regulation of protein binding / tertiary granule lumen / E3 ubiquitin ligases ubiquitinate target proteins / DAP12 signaling / antibacterial humoral response / MHC class II protein complex binding / late endosome membrane / T cell receptor signaling pathway / iron ion transport / ER-Phagosome pathway / T cell differentiation in thymus / early endosome membrane / protein refolding / cellular response to lipopolysaccharide / defense response to Gram-negative bacterium / protein homotetramerization / intracellular iron ion homeostasis / amyloid fibril formation / learning or memory / defense response to Gram-positive bacterium / immune response / Amyloid fiber formation / endoplasmic reticulum lumen / lysosomal membrane / Golgi membrane / external side of plasma membrane / innate immune response / signaling receptor binding / focal adhesion
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 / Immunoglobulins / Immunoglobulin-like fold / Immunoglobulin-like / Sandwich / 2-Layer Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
Beta-2-microglobulin / HLA class I histocompatibility antigen, A alpha chain / HLA class I histocompatibility antigen, A alpha chain / Beta-2-microglobulin
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.2 Å
AuthorsMartinez-Hackert, E. / Anikeeva, N. / Kalams, S.A. / Walker, B.D. / Hendrickson, W.A. / Sykulev, Y.
CitationJournal: J.Biol.Chem. / Year: 2006
Title: Structural Basis for Degenerate Recognition of Natural HIV Peptide Variants by Cytotoxic Lymphocytes.
Authors: Martinez-Hackert, E. / Anikeeva, N. / Kalams, S.A. / Walker, B.D. / Hendrickson, W.A. / Sykulev, Y.
History
DepositionApr 19, 2004Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 6, 2005Provider: repository / Type: Initial release
Revision 1.1Apr 30, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Aug 23, 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

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: HLA class I histocompatibility antigen, A-2 alpha chain
B: Beta-2-microglobulin
C: GAG PEPTIDE


Theoretical massNumber of molelcules
Total (without water)44,5833
Polymers44,5833
Non-polymers00
Water5,963331
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area4190 Å2
ΔGint-18 kcal/mol
Surface area18690 Å2
MethodPISA
Unit cell
Length a, b, c (Å)56.040, 79.780, 58.030
Angle α, β, γ (deg.)90.00, 116.62, 90.00
Int Tables number4
Space group name H-MP1211

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Components

#1: Protein HLA class I histocompatibility antigen, A-2 alpha chain / MHC class I antigen A*2 / HLA-A2


Mass: 31854.203 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: HLA-A, HLAA / Production host: Drosophila melanogaster (fruit fly) / Strain (production host): S2 / References: UniProt: P01892, UniProt: P04439*PLUS
#2: Protein Beta-2-microglobulin / HDCMA22P


Mass: 11748.160 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: B2M / Production host: Drosophila melanogaster (fruit fly) / Strain (production host): S2 / References: UniProt: P01884, UniProt: P61769*PLUS
#3: Protein/peptide GAG PEPTIDE


Mass: 980.156 Da / Num. of mol.: 1 / Source method: obtained synthetically
Details: The peptide was chemically synthesized. The sequence of the peptide is naturally found in human immunodeficiency virus.
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 331 / Source method: isolated from a natural source / Formula: H2O

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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: 2.6 Å3/Da / Density % sol: 52.7 %
Crystal growTemperature: 293 K / Method: vapor diffusion, hanging drop / pH: 6.5
Details: PEG/MES, pH 6.50, VAPOR DIFFUSION, HANGING DROP, temperature 293K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: NSLS / Beamline: X4A / Wavelength: 0.97907
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: Oct 5, 2001
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.97907 Å / Relative weight: 1
ReflectionResolution: 2.1→20 Å / Num. obs: 25116 / Biso Wilson estimate: 18 Å2

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Processing

Software
NameClassification
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 2HLA

2hla


Resolution: 2.2→11.99 Å / Rfactor Rfree error: 0.007 / Data cutoff high absF: 1201694.38 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0
RfactorNum. reflection% reflectionSelection details
Rfree0.24 1130 5.1 %RANDOM
Rwork0.18 ---
obs0.18 22148 95.6 %-
all-22148 --
Solvent computationSolvent model: FLAT MODEL / Bsol: 65.5047 Å2 / ksol: 0.456099 e/Å3
Displacement parametersBiso mean: 25.3 Å2
Baniso -1Baniso -2Baniso -3
1-3.19 Å20 Å2-1.35 Å2
2---4.23 Å20 Å2
3---1.04 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.28 Å0.2 Å
Luzzati d res low-5 Å
Luzzati sigma a0.24 Å0.11 Å
Refinement stepCycle: LAST / Resolution: 2.2→11.99 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3145 0 0 331 3476
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.007
X-RAY DIFFRACTIONc_bond_d_na
X-RAY DIFFRACTIONc_bond_d_prot
X-RAY DIFFRACTIONc_angle_d
X-RAY DIFFRACTIONc_angle_d_na
X-RAY DIFFRACTIONc_angle_d_prot
X-RAY DIFFRACTIONc_angle_deg1.3
X-RAY DIFFRACTIONc_angle_deg_na
X-RAY DIFFRACTIONc_angle_deg_prot
X-RAY DIFFRACTIONc_dihedral_angle_d25
X-RAY DIFFRACTIONc_dihedral_angle_d_na
X-RAY DIFFRACTIONc_dihedral_angle_d_prot
X-RAY DIFFRACTIONc_improper_angle_d0.76
X-RAY DIFFRACTIONc_improper_angle_d_na
X-RAY DIFFRACTIONc_improper_angle_d_prot
X-RAY DIFFRACTIONc_mcbond_it1.391.5
X-RAY DIFFRACTIONc_mcangle_it2.132
X-RAY DIFFRACTIONc_scbond_it2.422
X-RAY DIFFRACTIONc_scangle_it3.622.5
LS refinement shellResolution: 2.2→2.23 Å / Rfactor Rfree error: 0.037 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.288 61 6.7 %
Rwork0.181 853 -
obs--20.6 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2DNA-RNA_REP.PARAMDNA-RNA.TOP
X-RAY DIFFRACTION3WATER_REP.PARAMWATER.TOP
X-RAY DIFFRACTION4ION.PARAMION.TOP

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