5K06

Recombinant bovine beta-lactoglobulin with uncleaved N-terminal methionine (rBlgB)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.324 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.229 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.5 of the entry. See complete history


Literature

Engineered beta-Lactoglobulin Produced in E. coli: Purification, Biophysical and Structural Characterisation.

Loch, J.I.Bonarek, P.Tworzydo, M.Polit, A.Hawro, B.Lach, A.Ludwin, E.Lewinski, K.

(2016) Mol Biotechnol 58: 605-618

  • DOI: https://doi.org/10.1007/s12033-016-9960-z
  • Primary Citation of Related Structures:  
    5HTD, 5HTE, 5K06

  • PubMed Abstract: 

    Functional recombinant bovine β-lactoglobulin has been produced by expression in E. coli using an engineered protein gene and purified to homogeneity by applying a new protocol. Mutations L1A/I2S introduced into the protein sequence greatly facilitate in vivo cleavage of the N-terminal methionine, allowing correctly folded and soluble protein suitable for biochemical, biophysical and structural studies to be obtained. The use of gel filtration on Sephadex G75 at the last purification step enables protein without endogenous ligand to be obtained. The physicochemical properties of recombinant β-lactoglobulin such as CD spectra, ligand binding (n, K a, ΔH, TΔS, ΔG), chemical and thermal stability (ΔG D, C mid) and crystal structure confirmed that the protein obtained is almost identical to the natural one. The substitutions of N-terminal residues did not influence the binding properties of the recombinant protein so that the lactoglobulin produced and purified according to our protocol is a good candidate for further engineering and potential use in pharmacology and medicine.


  • Organizational Affiliation

    Biocrystallography Group, Department of Crystal Chemistry and Crystal Physics, Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060, Kraków, Poland.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-lactoglobulin163Bos taurusMutation(s): 0 
Gene Names: LGB
UniProt
Find proteins for P02754 (Bos taurus)
Explore P02754 
Go to UniProtKB:  P02754
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02754
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.324 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.229 
  • Space Group: P 64 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 106.651α = 90
b = 106.651β = 90
c = 59.312γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Science CentrePoland2012/05/B/ST5/00278

Revision History  (Full details and data files)

  • Version 1.0: 2016-07-20
    Type: Initial release
  • Version 1.1: 2016-10-05
    Changes: Database references
  • Version 1.2: 2017-08-09
    Changes: Data collection, Database references
  • Version 1.3: 2018-01-24
    Changes: Source and taxonomy
  • Version 1.4: 2018-10-24
    Changes: Data collection, Derived calculations
  • Version 1.5: 2024-01-10
    Changes: Data collection, Database references, Refinement description