4XVC

Crystal structure of an esterase from the bacterial hormone-sensitive lipase (HSL) family


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Interdomain Hydrophobic Interactions Modulate the Thermostability of Microbial Esterases from the Hormone-Sensitive Lipase Family.

Li, P.Y.Chen, X.L.Ji, P.Li, C.Y.Wang, P.Zhang, Y.Xie, B.B.Qin, Q.L.Su, H.N.Zhou, B.C.Zhang, Y.Z.Zhang, X.Y.

(2015) J.Biol.Chem. 290: 11188-11198

  • DOI: 10.1074/jbc.M115.646182

  • PubMed Abstract: 
  • Microbial hormone-sensitive lipases (HSLs) contain a CAP domain and a catalytic domain. However, it remains unclear how the CAP domain interacts with the catalytic domain to maintain the stability of microbial HSLs. Here, we isolated an HSL esterase, ...

    Microbial hormone-sensitive lipases (HSLs) contain a CAP domain and a catalytic domain. However, it remains unclear how the CAP domain interacts with the catalytic domain to maintain the stability of microbial HSLs. Here, we isolated an HSL esterase, E40, from a marine sedimental metagenomic library. E40 exhibited the maximal activity at 45 °C and was quite thermolabile, with a half-life of only 2 min at 40 °C, which may be an adaptation of E40 to the permanently cold sediment environment. The structure of E40 was solved to study its thermolability. Structural analysis showed that E40 lacks the interdomain hydrophobic interactions between loop 1 of the CAP domain and α7 of the catalytic domain compared with its thermostable homologs. Mutational analysis showed that the introduction of hydrophobic residues Trp(202) and Phe(203) in α7 significantly improved E40 stability and that a further introduction of hydrophobic residues in loop 1 made E40 more thermostable because of the formation of interdomain hydrophobic interactions. Altogether, the results indicate that the absence of interdomain hydrophobic interactions between loop 1 and α7 leads to the thermolability of E40. In addition, a comparative analysis of the structures of E40 and other thermolabile and thermostable HSLs suggests that the interdomain hydrophobic interactions between loop 1 and α7 are a key element for the thermostability of microbial HSLs. Therefore, this study not only illustrates the structural element leading to the thermolability of E40 but also reveals a structural determinant for HSL thermostability.


    Organizational Affiliation

    From the State Key Laboratory of Microbial Technology and the Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.,From the State Key Laboratory of Microbial Technology and the Marine Biotechnology Research Center, Shandong University, Jinan 250100, China zhangxiying@sdu.edu.cn.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Esterase E40
A, B, C, D, E, F, G, H
317N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PMS
Query on PMS

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
phenylmethanesulfonic acid
C7 H8 O3 S
NIXKBAZVOQAHGC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.196 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 74.630α = 74.04
b = 76.172β = 75.15
c = 130.186γ = 72.60
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data reduction
PHENIXrefinement
PHASERphasing
PHENIXmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2015-01-27 
  • Released Date: 2015-03-25 
  • Deposition Author(s): Zhang, Y., Li, P.

Revision History 

  • Version 1.0: 2015-03-25
    Type: Initial release
  • Version 1.1: 2015-04-08
    Type: Database references
  • Version 1.2: 2015-05-06
    Type: Database references