Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 14.36 kDa 
• Atom Count: 1042 
• Residue Count: 121 
• Unique protein chains: 1

3B0I

Crystal structure of recombinant human alpha lactalbumin

• DOI: 10.2210/pdb3B0I/pdb

• Classification: METAL BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2011-06-10 Released: 2012-06-13 
• Deposition Author(s): Makabe, K.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.256 
• R-Value Work: 0.209 
• R-Value Observed: 0.212 

Literature

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

• PubMed: 23155056 
• DOI: 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. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Alpha-lactalbumin	A	124	Homo sapiens	Mutation(s): 0  Gene Names: LALBA, LYZL7
Find proteins for P00709 (Homo sapiens) Explore P00709  Go to UniProtKB:  P00709
NIH Common Fund Data Resources
PHAROS:  P00709 GTEx:  ENSG00000167531

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	A	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
CA	A	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.256 
• R-Value Work: 0.209 
• R-Value Observed: 0.212 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 31.702	α = 90
b = 33.156	β = 104.09
c = 46.148	γ = 90

Software Package:

Software Name	Purpose
HKL-3000	data collection
MOLREP	phasing
REFMAC	refinement
HKL-3000	data reduction
HKL-3000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-06-10 
• Released Date: 2012-06-13 
Deposition Author(s): Makabe, K.

Revision History 

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