3KHQ

Crystal structure of murine Ig-beta (CD79b) in the monomeric form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural and Functional Studies of Igalphabeta and Its Assembly with the B Cell Antigen Receptor.

Radaev, S.Zou, Z.Tolar, P.Nguyen, K.Nguyen, A.Krueger, P.D.Stutzman, N.Pierce, S.Sun, P.D.

(2010) Structure 18: 934-943

  • DOI: 10.1016/j.str.2010.04.019
  • Primary Citation of Related Structures:  
    3KG5, 3KHO, 3KHQ

  • PubMed Abstract: 
  • The B cell antigen receptor (BCR) plays an essential role in all phases of B cell development. Here we show that the extracellular domains of murine and human Igbeta form an I-set immunoglobulin-like structure with an interchain disulfide between cys ...

    The B cell antigen receptor (BCR) plays an essential role in all phases of B cell development. Here we show that the extracellular domains of murine and human Igbeta form an I-set immunoglobulin-like structure with an interchain disulfide between cysteines on their G strands. Structural and sequence analysis suggests that Igalpha displays a similar fold as Igbeta. An Igalphabeta heterodimer model was generated based on the unique disulfide-bonded Igbeta dimer. Solution binding studies showed that the extracellular domains of Igalphabeta preferentially recognize the constant region of BCR with mu chain specificity, suggesting a role for Igalphabeta to enhance BCRmu chain signaling. Cluster mutations on Igalpha, Igbeta, and a membrane-bound form of immunoglobulin (mIgM) based on the structural model identified distinct areas of potential contacts involving charged residues on both subunits of the coreceptor and the Cmu4 domain of mIgM. These studies provide the first structural model for understanding BCR function.


    Organizational Affiliation

    Structural Immunology Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 12441 Parklawn Drive, Rockville, MD 20852, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
B-cell antigen receptor complex-associated protein beta chainA133Mus musculusMutation(s): 0 
Gene Names: Cd79bIgb
Find proteins for P15530 (Mus musculus)
Explore P15530 
Go to UniProtKB:  P15530
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GSH
Query on GSH

Download CCD File 
A
GLUTATHIONE
C10 H17 N3 O6 S
RWSXRVCMGQZWBV-WDSKDSINSA-N
 Ligand Interaction
FLC
Query on FLC

Download CCD File 
A
CITRATE ANION
C6 H5 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-K
 Ligand Interaction
MG
Query on MG

Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.188 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 35.63α = 90
b = 79.72β = 90
c = 34.32γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2009-10-30 
  • Released Date: 2010-08-25 
  • Deposition Author(s): Radaev, S., Sun, P.D.

Revision History 

  • Version 1.0: 2010-08-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-12-14
    Changes: Non-polymer description
  • Version 1.3: 2019-07-17
    Changes: Advisory, Data collection, Refinement description