5CE5

Probing the roles of two tryptophans surrounding the unique zinc coordination site in lipase family I.5


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.166 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Probing the roles of two tryptophans surrounding the unique zinc coordination site in lipase family I.5.

Timucin, E.Cousido-Siah, A.Mitschler, A.Podjarny, A.Sezerman, O.U.

(2016) Proteins 84: 129-142

  • DOI: 10.1002/prot.24961
  • Primary Citation of Related Structures:  
    5CE5

  • PubMed Abstract: 
  • A unique zinc domain found in all of the identified members of the lipase family I.5 is surrounded by two conserved tryptophans (W61 and W212). In this study, we investigated the role of these hydrophobic residues in thermostability and thermoactivity of the lipase from Bacillus thermocatenulatus (BTL2) taken as the representative of the family ...

    A unique zinc domain found in all of the identified members of the lipase family I.5 is surrounded by two conserved tryptophans (W61 and W212). In this study, we investigated the role of these hydrophobic residues in thermostability and thermoactivity of the lipase from Bacillus thermocatenulatus (BTL2) taken as the representative of the family. Circular dichroism spectroscopy revealed that the secondary structure of BTL2 is conserved by the tryptophan mutations (W61A, W212A, and W61A/W212A), and that W61 is located in a more rigid and less solvent exposed region than is W212. Thermal denaturation and optimal activity analyses pointed out that zinc induces thermostability and thermoactivity of BTL2, in which both tryptophans W61 and W212 play contributing roles. Molecular explanations describing the roles of these tryptophans were pursued by X-ray crystallography of the open form of the W61A mutant and molecular dynamics simulations which highlighted a critical function for W212 in zinc binding to the coordination site. This study reflects the potential use of hydrophobic amino acids in vicinity of metal coordination sites in lipase biocatalysts design.


    Organizational Affiliation

    Department of Biostatistics and Medical Informatics, School of Medicine, Acibadem University, Atasehir, Istanbul, 34742, Turkey.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Triacylglycerol lipaseA387Geobacillus thermocatenulatusMutation(s): 1 
EC: 3.1.1.3
UniProt
Find proteins for Q59260 (Geobacillus thermocatenulatus)
Explore Q59260 
Go to UniProtKB:  Q59260
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ59260
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
P15
Query on P15

Download Ideal Coordinates CCD File 
D [auth A]2,5,8,11,14,17-HEXAOXANONADECAN-19-OL
C13 H28 O7
FHHGCKHKTAJLOM-UHFFFAOYSA-N
 Ligand Interaction
1PE
Query on 1PE

Download Ideal Coordinates CCD File 
E [auth A]PENTAETHYLENE GLYCOL
C10 H22 O6
JLFNLZLINWHATN-UHFFFAOYSA-N
 Ligand Interaction
MPD
Query on MPD

Download Ideal Coordinates CCD File 
F [auth A],
G [auth A],
H [auth A]
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
C [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
B [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.166 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.305α = 90
b = 128.18β = 90
c = 127.963γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-12-02
    Type: Initial release
  • Version 1.1: 2016-01-27
    Changes: Database references