1GT6

S146A mutant of Thermomyces (Humicola) lanuginosa lipase complex with oleic acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Binding of Thermomyces (Humicola) lanuginosa lipase to the mixed micelles of cis-parinaric acid/NaTDC.

Yapoudjian, S.Ivanova, M.G.Brzozowski, A.M.Patkar, S.A.Vind, J.Svendsen, A.Verger, R.

(2002) Eur.J.Biochem. 269: 1613-1621


  • PubMed Abstract: 
  • The binding of Thermomyces lanuginosa lipase and its mutants [TLL(S146A), TLL(W89L), TLL(W117F, W221H, W260H)] to the mixed micelles of cis-parinaric acid/sodium taurodeoxycholate at pH 5.0 led to the quenching of the intrinsic tryptophan fluorescenc ...

    The binding of Thermomyces lanuginosa lipase and its mutants [TLL(S146A), TLL(W89L), TLL(W117F, W221H, W260H)] to the mixed micelles of cis-parinaric acid/sodium taurodeoxycholate at pH 5.0 led to the quenching of the intrinsic tryptophan fluorescence emission (300-380 nm) and to a simultaneous increase in the cis-parinaric acid fluorescence emission (380-500 nm). These findings were used to characterize the Thermomyces lanuginosa lipase/cis-parinaric acid interactions occurring in the presence of sodium taurodeoxycholate. The fluorescence resonance energy transfer and Stern-Volmer quenching constant values obtained were correlated with the accessibility of the tryptophan residues to the cis-parinaric acid and with the lid opening ability of Thermomyces lanuginosa lipase (and its mutants). TLL(S146A) was found to have the highest fluorescence resonance energy transfer. In addition, a TLL(S146A)/oleic acid complex was crystallised and its three-dimensional structure was solved. Surprisingly, two possible binding modes (sn-1 and antisn1) were found to exist between oleic acid and the catalytic cleft of the open conformation of TLL(S146A). Both binding modes involved an interaction with tryptophan 89 of the lipase lid, in agreement with fluorescence resonance energy transfer experiments. As a consequence, we concluded that TLL(S146A) mutant is not an appropriate substitute for the wild-type Thermomyces lanuginosa lipase for mimicking the interaction between the wild-type enzyme and lipids.


    Organizational Affiliation

    Laboratoire de Lipolyse Enzymatique CNRS-IFR1, Marseille, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lipase
A, B
269Thermomyces lanuginosusMutation(s): 1 
Gene Names: LIP
EC: 3.1.1.3
Find proteins for O59952 (Thermomyces lanuginosus)
Go to UniProtKB:  O59952
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OLA
Query on OLA

Download SDF File 
Download CCD File 
A, B
OLEIC ACID
C18 H34 O2
ZQPPMHVWECSIRJ-KTKRTIGZSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.214 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 117.101α = 90.00
b = 97.304β = 90.00
c = 55.508γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
REFMACrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-01-23
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-11-14
    Type: Advisory, Data collection, Database references, Source and taxonomy, Structure summary
  • Version 1.4: 2019-10-09
    Type: Data collection, Database references