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- PDB-3x0e: Crystal structure of the ectodomain of human CD81 large extracell... -

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Basic information

Entry
Database: PDB / ID: 3x0e
TitleCrystal structure of the ectodomain of human CD81 large extracellular loop (hCD81-LEL)
ComponentsCD81 antigen
KeywordsCELL ADHESION / helical bundle / disulfide bond / immune cell adhesion / morphology / activation / proliferation / differentiation
Function / homology
Function and homology information


positive regulation of adaptive immune memory response / positive regulation of protein catabolic process in the vacuole / macrophage fusion / CD4-positive, alpha-beta T cell costimulation / positive regulation of B cell receptor signaling pathway / osteoclast fusion / myoblast fusion involved in skeletal muscle regeneration / positive regulation of T cell activation via T cell receptor contact with antigen bound to MHC molecule on antigen presenting cell / positive regulation of inflammatory response to antigenic stimulus / regulation of macrophage migration ...positive regulation of adaptive immune memory response / positive regulation of protein catabolic process in the vacuole / macrophage fusion / CD4-positive, alpha-beta T cell costimulation / positive regulation of B cell receptor signaling pathway / osteoclast fusion / myoblast fusion involved in skeletal muscle regeneration / positive regulation of T cell activation via T cell receptor contact with antigen bound to MHC molecule on antigen presenting cell / positive regulation of inflammatory response to antigenic stimulus / regulation of macrophage migration / immunological synapse formation / transferrin receptor binding / tetraspanin-enriched microdomain / protein localization to lysosome / positive regulation of protein exit from endoplasmic reticulum / positive regulation of T-helper 2 cell cytokine production / humoral immune response mediated by circulating immunoglobulin / MHC class II protein binding / positive regulation of CD4-positive, alpha-beta T cell proliferation / cholesterol binding / positive regulation of T cell receptor signaling pathway / immunological synapse / cellular response to low-density lipoprotein particle stimulus / positive regulation of receptor clustering / positive regulation of B cell proliferation / basal plasma membrane / Regulation of Complement cascade / protein localization to plasma membrane / regulation of protein stability / receptor internalization / integrin binding / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / MHC class II protein complex binding / virus receptor activity / basolateral plasma membrane / vesicle / positive regulation of MAPK cascade / focal adhesion / positive regulation of transcription by RNA polymerase II / extracellular exosome / membrane / plasma membrane / cytosol
Similarity search - Function
Cd81 Antigen, Extracellular Domain; Chain: A / Tetraspanin / Tetraspanin, conserved site / Transmembrane 4 family signature. / Tetraspanin, animals / Tetraspanin, EC2 domain superfamily / Tetraspanin/Peripherin / Tetraspanin family / Orthogonal Bundle / Mainly Alpha
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.844 Å
AuthorsZhang, M. / Cui, S.
CitationJournal: Faseb J. / Year: 2015
Title: An intramolecular bond at cluster of differentiation 81 ectodomain is important for hepatitis C virus entry.
Authors: Yang, W. / Zhang, M. / Chi, X. / Liu, X. / Qin, B. / Cui, S.
History
DepositionOct 14, 2014Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jul 1, 2015Provider: repository / Type: Initial release
Revision 1.1Jul 8, 2015Group: Database references
Revision 1.2Aug 24, 2022Group: Database references / Derived calculations
Category: citation / database_2 ...citation / database_2 / pdbx_struct_conn_angle / struct_conn / struct_ref_seq_dif / struct_site
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.title / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_struct_conn_angle.ptnr1_auth_asym_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr2_auth_asym_id / _pdbx_struct_conn_angle.ptnr2_auth_seq_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.value / _struct_conn.pdbx_dist_value / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_ref_seq_dif.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Revision 1.3Nov 8, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model
Revision 1.4Nov 6, 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: CD81 antigen
B: CD81 antigen
hetero molecules


Theoretical massNumber of molelcules
Total (without water)20,6197
Polymers20,4972
Non-polymers1225
Water2,270126
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area2360 Å2
ΔGint-52 kcal/mol
Surface area9420 Å2
MethodPISA
Unit cell
Length a, b, c (Å)31.124, 77.408, 38.497
Angle α, β, γ (deg.)90.00, 107.94, 90.00
Int Tables number4
Space group name H-MP1211

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Components

#1: Protein CD81 antigen / 26 kDa cell surface protein TAPA-1 / Target of the antiproliferative antibody 1 / Tetraspanin-28 / Tspan-28


Mass: 10248.508 Da / Num. of mol.: 2 / Fragment: large extracellular loop, UNP residues 113-202
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CD81, TAPA1, TSPAN28 / Plasmid: pET-28a / Production host: Escherichia coli (E. coli) / Strain (production host): Rosetta(DE3) / References: UniProt: P60033
#2: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: Mg
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 126 / 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: 2.15 Å3/Da / Density % sol: 42.86 %
Crystal growTemperature: 295 K / Method: vapor diffusion, hanging drop
Details: 0.2M Magnesium acetate 20% PEG 3350, VAPOR DIFFUSION, HANGING DROP, temperature 295K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: SSRF / Beamline: BL17U / Wavelength: 0.979 Å
DetectorType: ADSC QUANTUM 315r / Detector: CCD / Date: Dec 1, 2013 / Details: mirrors
RadiationMonochromator: double crystal Si(111) / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.979 Å / Relative weight: 1
ReflectionResolution: 1.834→36.625 Å / Num. all: 15251 / Num. obs: 14801 / % possible obs: 97 % / Observed criterion σ(F): -3 / Observed criterion σ(I): -3 / Redundancy: 6.6 % / Biso Wilson estimate: 31.502 Å2 / Rmerge(I) obs: 0.016 / Net I/σ(I): 16.63
Reflection shellResolution: 1.83→1.94 Å / Redundancy: 5.56 % / Rmerge(I) obs: 0.515 / Mean I/σ(I) obs: 5 / Num. unique all: 2451 / % possible all: 86.1

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Processing

Software
NameVersionClassification
HKL-2000data collection
PHASERphasing
PHENIX(phenix.refine: 1.7.3_928)refinement
XDSpackagedata reduction
XDSpackagedata scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 4BKH

4bkh
PDB Unreleased entry


Resolution: 1.844→29.61 Å / SU ML: 0.28 / Cross valid method: THROUGHOUT / σ(F): 1.38 / Phase error: 23.69 / Stereochemistry target values: ML
RfactorNum. reflection% reflectionSelection details
Rfree0.225 737 4.99 %RANDOM
Rwork0.195 ---
obs0.1965 14771 98.59 %-
all-15251 --
Solvent computationShrinkage radii: 0.73 Å / VDW probe radii: 1 Å / Solvent model: FLAT BULK SOLVENT MODEL / Bsol: 54.427 Å2 / ksol: 0.398 e/Å3
Displacement parametersBiso mean: 33.266 Å2
Baniso -1Baniso -2Baniso -3
1--0.8642 Å20 Å25.9985 Å2
2---6.3708 Å20 Å2
3---7.235 Å2
Refinement stepCycle: LAST / Resolution: 1.844→29.61 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms1350 0 5 126 1481
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.0071397
X-RAY DIFFRACTIONf_angle_d0.9011888
X-RAY DIFFRACTIONf_dihedral_angle_d15.117514
X-RAY DIFFRACTIONf_chiral_restr0.054226
X-RAY DIFFRACTIONf_plane_restr0.003247
LS refinement shell

Refine-ID: X-RAY DIFFRACTION / Total num. of bins used: 5

Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection Rwork% reflection obs (%)
1.8443-1.98670.34461380.2893271996
1.9867-2.18650.28021470.20812834100
2.1865-2.50280.24911390.19152830100
2.5028-3.15270.20621610.19522856100
3.1527-29.61420.19811520.1774279597

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