5K06

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.324 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.4 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: 10.1007/s12033-016-9960-z
  • Primary Citation of Related Structures:  

  • 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 facilitat ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-lactoglobulin
A
163Bos taurusMutation(s): 0 
Gene Names: LGB
Find proteins for P02754 (Bos taurus)
Go to UniProtKB:  P02754
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MYR
Query on MYR

Download SDF File 
Download CCD File 
A
MYRISTIC ACID
C14 H28 O2
TUNFSRHWOTWDNC-UHFFFAOYSA-N
 Ligand Interaction
SIN
Query on SIN

Download SDF File 
Download CCD File 
A
SUCCINIC ACID
C4 H6 O4
KDYFGRWQOYBRFD-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.324 
  • R-Value Work: 0.213 
  • Space Group: P 64 2 2
Unit Cell:
Length (Å)Angle (°)
a = 106.651α = 90.00
b = 106.651β = 90.00
c = 59.312γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


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

Revision History 

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