4CKD

Model of complex between the E.coli enzyme beta-galactosidase and four single chain Fv antibody domains scFv13R4.


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 13 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Molecular Mechanism of Antibody-Mediated Activation of Beta-Galactosidase.

Vinothkumar, K.R.Mcmullan, G.Henderson, R.

(2014) Structure 22: 621

  • DOI: 10.1016/j.str.2014.01.011

  • PubMed Abstract: 
  • Binding of a single-chain Fv antibody to Escherichia coli β-galactosidase (β-gal) is known to stabilize the enzyme and activate several inactive point mutants, historically called antibody-mediated enzyme formation mutants. To understand the nature o ...

    Binding of a single-chain Fv antibody to Escherichia coli β-galactosidase (β-gal) is known to stabilize the enzyme and activate several inactive point mutants, historically called antibody-mediated enzyme formation mutants. To understand the nature of this activation, we have determined by electron cryo-microscopy the structure of the complex between β-gal and the antibody scFv13R4. Our structure localizes the scFv13R4 binding site to the crevice between domains 1 and 3 in each β-gal subunit. The mutations that scFv13R4 counteracts are located between the antibody binding site and the active site of β-gal, at one end of the TIM-barrel that forms domain 3 where the substrate lactose is hydrolyzed. The mode of binding suggests how scFv stabilizes both the active site of β-gal and the tetrameric state.


    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BETA-GALACTOSIDASE
A, B, C, D
1024Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: lacZ
EC: 3.2.1.23
Find proteins for P00722 (Escherichia coli (strain K12))
Go to UniProtKB:  P00722
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SCFV13R4 ANTIBODY FV HEAVY CHAIN
H, I, J, K
114Mus musculusMutation(s): 0 
Find proteins for P01823 (Mus musculus)
Go to UniProtKB:  P01823
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
SCFV13R4 ANTIBODY FV LIGHT CHAIN
L, M, N, O
107Mus musculusMutation(s): 0 
Gene Names: Gm10881
Find proteins for P01642 (Mus musculus)
Go to UniProtKB:  P01642
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 13 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-01-15
    Type: Initial release
  • Version 1.1: 2014-03-26
    Type: Database references, Source and taxonomy, Structure summary
  • Version 1.2: 2014-04-23
    Type: Database references
  • Version 1.3: 2017-08-30
    Type: Data collection