1HFZ

ALPHA-LACTALBUMIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 

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This is version 1.3 of the entry. See complete history


Literature

Crystal structures of guinea-pig, goat and bovine alpha-lactalbumin highlight the enhanced conformational flexibility of regions that are significant for its action in lactose synthase.

Pike, A.C.Brew, K.Acharya, K.R.

(1996) Structure 4: 691-703

  • DOI: 10.1016/s0969-2126(96)00075-5
  • Primary Citation of Related Structures:  
    1HFX, 1HFY, 1HFZ

  • PubMed Abstract: 
  • The regulation of milk lactose biosynthesis is highly dependent on the action of a specifier protein, alpha-lactalbumin (LA). Together with a glycosyltransferase, LA forms the enzyme complex lactose synthase. LA promotes the binding of glucose to the complex and facilitates the biosynthesis of lactose ...

    The regulation of milk lactose biosynthesis is highly dependent on the action of a specifier protein, alpha-lactalbumin (LA). Together with a glycosyltransferase, LA forms the enzyme complex lactose synthase. LA promotes the binding of glucose to the complex and facilitates the biosynthesis of lactose. To gain further insight into the molecular basis of LA function in lactose synthase we have determined the structures of three species variants of LA.


    Related Citations: 
    • Study by Mutagenesis of the Roles of Two Aromatic Clusters of Alpha-Lactalbumin in Aspects of its Action in the Lactose Synthase System
      Grobler, J.A., Wang, M., Pike, A.C., Brew, K.
      (1994) J Biol Chem 269: 5106
    • Crystal Structure of Human Alpha-Lactalbumin at 1.7 A Resolution
      Acharya, K.R., Ren, J.S., Stuart, D.I., Phillips, D.C., Fenna, R.E.
      (1991) J Mol Biol 221: 571
    • Refined Structure of Baboon Alpha-Lactalbumin at 1.7 A Resolution. Comparison with C-Type Lysozyme
      Acharya, K.R., Stuart, D.I., Walker, N.P., Lewis, M., Phillips, D.C.
      (1989) J Mol Biol 208: 99

    Organizational Affiliation

    School of Biology and Biochemistry, University of Bath, Claverton Down, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ALPHA-LACTALBUMINA, B, C, D124Bos taurusMutation(s): 1 
Gene Names: BOVINE ALPHA-LACTALBUMIN CDNALALBAALACTA
EC: 2.4.1.22
UniProt
Find proteins for P00711 (Bos taurus)
Explore P00711 
Go to UniProtKB:  P00711
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00711
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.62α = 90
b = 60.13β = 96.85
c = 77.18γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-07-29
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-11-03
    Changes: Database references, Derived calculations