1T2N

Structure of a thermostable triple mutant of Bacillus subtilis lipase obtained through directed evolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.228 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Structural basis of selection and thermostability of laboratory evolved Bacillus subtilis lipase.

Acharya, P.Rajakumara, E.Sankaranarayanan, R.Rao, N.M.

(2004) J Mol Biol 341: 1271-1281

  • DOI: https://doi.org/10.1016/j.jmb.2004.06.059
  • Primary Citation of Related Structures:  
    1T2N, 1T4M

  • PubMed Abstract: 

    Variation in gene sequences generated by directed evolution approaches often does not assure a minimalist design for obtaining a desired property in proteins. While screening for enhanced thermostability, structural information was utilized in selecting mutations that are generated by error-prone PCR. By this approach we have increased the half-life of denaturation by 300-fold compared to the wild-type Bacillus subtilis lipase through three point mutations generated by only two cycles of error-prone PCR. At lower temperatures the activity parameters of the thermostable mutants are unaltered. High-resolution crystal structures of the mutants show subtle changes, which include stacking of tyrosine residues, peptide plane flipping and a better anchoring of the terminus, that challenge rational design and explain the structural basis for enhanced thermostability. The approach may offer an efficient and minimalist solution for the enhancement of a desired property of a protein.


  • Organizational Affiliation

    Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Lipase181Bacillus subtilisMutation(s): 3 
Gene Names: LIPALIPBSU02700
EC: 3.1.1.3
UniProt
Find proteins for P37957 (Bacillus subtilis (strain 168))
Explore P37957 
Go to UniProtKB:  P37957
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP37957
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download Ideal Coordinates CCD File 
B [auth A]POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.228 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.863α = 90
b = 75.863β = 90
c = 102.68γ = 120
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CCP4phasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-11-23
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2014-09-10
    Changes: Database references
  • Version 1.4: 2021-10-27
    Changes: Database references, Derived calculations
  • Version 1.5: 2023-08-23
    Changes: Data collection, Refinement description