1BLI

BACILLUS LICHENIFORMIS ALPHA-AMYLASE

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.154 

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This is version 1.2 of the entry. See complete history. 


Literature

Activation of Bacillus licheniformis alpha-amylase through a disorder-->order transition of the substrate-binding site mediated by a calcium-sodium-calcium metal triad.

Machius, M., Declerck, N., Huber, R., Wiegand, G.

(1998) Structure 6: 281-292

  • DOI: 10.1016/s0969-2126(98)00032-x
  • Primary Citation of Related Structures:  
    1BLI

  • PubMed Abstract: 

    • The structural basis as to how metals regulate the functional state of a protein by altering or stabilizing its conformation has been characterized in relatively few cases because the metal-free form of the protein is often partially disordered and unsuitable for crystallographic analysis ...

    The structural basis as to how metals regulate the functional state of a protein by altering or stabilizing its conformation has been characterized in relatively few cases because the metal-free form of the protein is often partially disordered and unsuitable for crystallographic analysis. This is not the case, however, for Bacillus licheniformis alpha-amylase (BLA) for which the structure of the metal-free form is available. BLA is a hyperthermostable enzyme which is widely used in biotechnology, for example in the breakdown of starch or as a component of detergents. The determination of the structure of BLA in the metal-containing form, together with comparisons to the apo enzyme, will help us to understand the way in which metal ions can regulate enzyme activity.

    Related Citations: 
    • Crystal Structure of Thermostable Alpha-Amylase from Bacillus Licheniformis Refined at 1.7 A Resolution
      Hwang, K.Y., Song, H.K., Chang, C., Lee, J., Lee, S.Y., Kim, K.K., Choe, S., Sweet, R.M., Suh, S.W.
      (1997) Mol Cells 7: 251
    • Crystal Structure of Calcium-Depleted Bacillus Licheniformis Alpha-Amylase at 2.2 A Resolution
      Machius, M., Wiegand, G., Huber, R.
      (1995) J Mol Biol 246: 545
    Organizational Affiliation: 

    Max-Planck-Institut für Biochemie, Planegg-Martinsried, Germany. machius@chop.swmed.edu



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ALPHA-AMYLASEA483Bacillus licheniformisMutation(s): 3 
Gene Names: amyL, amyS
EC: 3.2.1.1
UniProt
Find proteins for P06278 (Bacillus licheniformis)
Explore P06278 
Go to UniProtKB:  P06278
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA
Download Ideal Coordinates CCD File 
 B [auth A], C [auth A], D [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
NA
Query on NA
Download Ideal Coordinates CCD File 
 E [auth A]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.154 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.3α = 90
b = 91.3β = 90
c = 137.7γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-03-23
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance