Experimental Data Snapshot

  • Resolution: 2.20 Å

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Biochemical characterization and crystal structure of a recombinant hen avidin and its acidic mutant expressed in Escherichia coli.

Nardone, E.Rosano, C.Santambrogio, P.Curnis, F.Corti, A.Magni, F.Siccardi, A.G.Paganelli, G.Losso, R.Apreda, B.Bolognesi, M.Sidoli, A.Arosio, P.

(1998) Eur J Biochem 256: 453-460

  • DOI: https://doi.org/10.1046/j.1432-1327.1998.2560453.x
  • Primary Citation of Related Structures:  
    1RAV, 2CAM

  • PubMed Abstract: 

    The mature hen avidin encoded by a synthetic cDNA was expressed in Escherichia coli in an insoluble form. After resolubilization, renaturation and purification, a recovery of about 20 mg/l cell culture was obtained. ELISA assays indicated no apparent differences in biotin binding between the natural and recombinant avidins. In addition, an acidic avidin mutant, bearing the substitutions Lys3-->Glu, Lys9--> Glu, Arg26-->Asp and Arg124-->Leu of four exposed basic residues, was produced. The protein, expressed and renatured as wild-type avidin, showed unaltered biotin-binding activity. The acidic pI (approximately 5.5) and lack of aggregation of the mutant allowed easy electrophoretic analysis under non-denaturing conditions of the protein alone and of its complexes with biotin, biotinylated transferrin or peroxidase. Analysis of the sera from sensitized subjects revealed that the avidin mutant has altered antigenicity. Both recombinant avidins were crystallized and the three-dimensional structures solved by molecular replacement and refined to 0.22 nm resolution. The three-dimensional structures of the two recombinant molecules, in the absence of biotin and of glycosylation, are fully comparable with those of the natural hen avidin previously reported.

  • Organizational Affiliation

    Dibit, Department of Biological and Technological Research, San Raffaele Scientific Institute, Milano, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
127Gallus gallusMutation(s): 0 
Find proteins for P02701 (Gallus gallus)
Explore P02701 
Go to UniProtKB:  P02701
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02701
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.69α = 90
b = 80.79β = 90
c = 43.63γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
CCP4data reduction
CCP4data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-07-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2023-08-09
    Changes: Database references, Refinement description