1A4V

ALPHA-LACTALBUMIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.263 
  • R-Value Work: 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

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


    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-LACTALBUMIN
A
123Homo sapiensMutation(s): 0 
Gene Names: LALBA (LYZL7)
Find proteins for P00709 (Homo sapiens)
Go to Gene View: LALBA
Go to UniProtKB:  P00709
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.210 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 35.470α = 90.00
b = 69.560β = 90.00
c = 45.960γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORphasing
XENGENdata scaling
XENGENdata reduction
X-PLORrefinement
XENGENdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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