Crystal structure of alpha-lactalbumin

Experimental Data Snapshot

  • Resolution: 1.61 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.153 
  • R-Value Observed: 0.155 

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Structural insights into the stability perturbations induced by N-terminal variation in human and goat alpha-lactalbumin

Makabe, K.Nakamura, T.Kuwajima, K.

(2013) Protein Eng Des Sel 26: 165-170

  • DOI: https://doi.org/10.1093/protein/gzs093
  • Primary Citation of Related Structures:  
    3B0I, 3B0K, 3B0O

  • PubMed Abstract: 

    Addition of an extra methionine at the N-terminus by recombinant expression of α-lactalbumin in Escherichia coli significantly destabilizes the protein, and this destabilization has hampered mutational analyses such as the mutational phi-value analysis of the protein. Deletion of residue 1 from the recombinant form recovers the stability in human and goat α-lactalbumin. Here, we thus determined the crystal structures of the residue 1-deletion variants of recombinant human and goat α-lactalbumin, and compared the structures with those of the authentic and recombinant forms. The results demonstrate the importance of the N-terminal backbone structure and hydrogen-bonding pattern for the stability of α-lactalbumin.

  • Organizational Affiliation

    Okazaki Institute for Integrative Bioscience and Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787, Japan. makabe@yz.yamagata-u.ac.jp

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
123Homo sapiensMutation(s): 0 
Gene Names: LALBALYZL7
UniProt & NIH Common Fund Data Resources
Find proteins for P00709 (Homo sapiens)
Explore P00709 
Go to UniProtKB:  P00709
PHAROS:  P00709
GTEx:  ENSG00000167531 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00709
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.61 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.153 
  • R-Value Observed: 0.155 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 32.917α = 90
b = 68.161β = 92.22
c = 46.212γ = 90
Software Package:
Software NamePurpose
HKL-3000data collection
HKL-3000data reduction
HKL-3000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-06-13
    Type: Initial release
  • Version 1.1: 2014-01-15
    Changes: Database references