1BQH

MURINE CD8AA ECTODOMAIN FRAGMENT IN COMPLEX WITH H-2KB/VSV8


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.212 

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This is version 2.0 of the entry. See complete history


Literature

Structural basis of CD8 coreceptor function revealed by crystallographic analysis of a murine CD8alphaalpha ectodomain fragment in complex with H-2Kb.

Kern, P.S.Teng, M.K.Smolyar, A.Liu, J.H.Liu, J.Hussey, R.E.Spoerl, R.Chang, H.C.Reinherz, E.L.Wang, J.H.

(1998) Immunity 9: 519-530

  • DOI: 10.1016/s1074-7613(00)80635-4
  • Primary Citation of Related Structures:  
    1BQH

  • PubMed Abstract: 
  • The crystal structure of the two immunoglobulin variable-like domains of the murine CD8alphaalpha homodimer complexed to the class I MHC H-2Kb molecule at 2.8 A resolution shows that CD8alphaalpha binds to the protruding MHC alpha3 domain loop in an antibody-like manner ...

    The crystal structure of the two immunoglobulin variable-like domains of the murine CD8alphaalpha homodimer complexed to the class I MHC H-2Kb molecule at 2.8 A resolution shows that CD8alphaalpha binds to the protruding MHC alpha3 domain loop in an antibody-like manner. Comparison of mouse CD8alphaalpha/H-2Kb and human CD8alphaalpha/HLA-A2 complexes reveals shared as well as species-specific recognition features. In both species, coreceptor function apparently involves the participation of CD8 dimer in a bidentate attachment to an MHC class I molecule in conjunction with a T cell receptor without discernable conformational alteration of the peptide or MHC antigen-presenting platform.


    Organizational Affiliation

    Laboratory of Immunobiology, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (H-2 CLASS I HISTOCOMPATIBILITY ANTIGEN)A, D274Mus musculusMutation(s): 0 
Gene Names: H2-K1H2-K
UniProt
Find proteins for P01901 (Mus musculus)
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Go to UniProtKB:  P01901
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UniProt GroupP01901
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (BETA-2-MICROGLOBULIN )B, E99Mus musculusMutation(s): 0 
Gene Names: B2m
UniProt & NIH Common Fund Data Resources
Find proteins for P01887 (Mus musculus)
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Go to UniProtKB:  P01887
IMPC:  MGI:88127
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UniProt GroupP01887
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (VSV8)C, F8N/AMutation(s): 0 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (CD8A OR LYT2 OR LYT-2)G,
H,
I,
J [auth K]
129Mus musculusMutation(s): 0 
Gene Names: Cd8aLyt-2Lyt2
UniProt
Find proteins for P01731 (Mus musculus)
Explore P01731 
Go to UniProtKB:  P01731
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UniProt GroupP01731
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Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download Ideal Coordinates CCD File 
K [auth G],
L [auth H],
M [auth I],
N [auth K]
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.212 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.9α = 90
b = 98.4β = 90
c = 170.6γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
X-PLORrefinement

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-08-19
    Type: Initial release
  • Version 1.1: 2007-10-16
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Structure summary