1A4V

ALPHA-LACTALBUMIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural evidence for the presence of a secondary calcium binding site in human alpha-lactalbumin.

Chandra, N.Brew, K.Acharya, K.R.

(1998) Biochemistry 37: 4767-4772

  • DOI: 10.1021/bi973000t
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The high-resolution X-ray crystal structure of human alpha-lactalbumin (at 1.8 A) in the presence of an elevated level of calcium reveals a new secondary calcium binding site, 7.9 A away from the primary calcium binding site known in all alpha-lactal ...

    The high-resolution X-ray crystal structure of human alpha-lactalbumin (at 1.8 A) in the presence of an elevated level of calcium reveals a new secondary calcium binding site, 7.9 A away from the primary calcium binding site known in all alpha-lactalbumin structures so far. The new calcium binding site is different from the zinc and sulfate binding sites [Ren, J., et al. (1993) J. Biol. Chem. 268, 19292-19298] but shares common features with the manganese binding site as described by Gerkin [Gerkin, T. A. (1984) Biochemistry 23, 4688-4697]. The proximity of the manganese and calcium binding region and the location of the functional site on one side of the charged surface of the alpha-lactalbumin molecule suggest that these binding sites might play a role in the formation of the lactose synthase complex.


    Related Citations: 
    • 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
    • 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
    • Alpha-Lactalbumin Possesses a Distinct Zinc Binding Site
      Ren, J., Stuart, D.I., Acharya, K.R.
      (1993) J Biol Chem 268: 19292
    • 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

    Organizational Affiliation

    Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALPHA-LACTALBUMINA123Homo sapiensMutation(s): 0 
Gene Names: LALBALYZL7
EC: 2.4.1.22
Find proteins for P00709 (Homo sapiens)
Explore P00709 
Go to UniProtKB:  P00709
NIH Common Fund Data Resources
PHAROS  P00709
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.210 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 35.47α = 90
b = 69.56β = 90
c = 45.96γ = 90
Software Package:
Software NamePurpose
XENGENdata collection
XENGENdata reduction
X-PLORmodel building
X-PLORrefinement
XENGENdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-04-27
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance