2Q0Q

Structure of the Native M. Smegmatis Aryl Esterase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.175 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of a novel enzyme that catalyzes acyl transfer to alcohols in aqueous conditions.

Mathews, I.Soltis, M.Saldajeno, M.Ganshaw, G.Sala, R.Weyler, W.Cervin, M.A.Whited, G.Bott, R.

(2007) Biochemistry 46: 8969-8979

  • DOI: 10.1021/bi7002444
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The unusual architecture of the enzyme (MsAcT) isolated from Mycobacterium smegmatis forms the mechanistic basis for favoring alcoholysis over hydrolysis in water. Unlike hydrolases that perform alcoholysis only under anhydrous conditions, MsAcT demo ...

    The unusual architecture of the enzyme (MsAcT) isolated from Mycobacterium smegmatis forms the mechanistic basis for favoring alcoholysis over hydrolysis in water. Unlike hydrolases that perform alcoholysis only under anhydrous conditions, MsAcT demonstrates alcoholysis in substantially aqueous media and, in the presence of hydrogen peroxide, has a perhydrolysis:hydrolysis ratio 50-fold greater than that of the best lipase tested. The crystal structures of the apoenzyme and an inhibitor-bound form have been determined to 1.5 A resolution. MsAcT is an octamer in the asymmetric unit and forms a tightly associated aggregate in solution. Relative to other structurally similar monomers, MsAcT contains several insertions that contribute to the oligomerization and greatly restrict the shape of the active site, thereby limiting its accessibility. These properties create an environment by which MsAcT can catalyze transesterification reactions in an aqueous medium and suggests how a serine hydrolase can be engineered to be an efficient acyltransferase.


    Organizational Affiliation

    Stanford Synchrotron Research Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
aryl esterase
A, B, C, D, E, F, G, H
216Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155)Mutation(s): 0 
Find proteins for A0R5U7 (Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155))
Go to UniProtKB:  A0R5U7
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D, E, F, G, H
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.175 
  • Space Group: P 4
Unit Cell:
Length (Å)Angle (°)
a = 98.163α = 90.00
b = 98.163β = 90.00
c = 229.896γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
ADSCdata collection
MOSFLMdata reduction
SCALAdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-12-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Non-polymer description, Version format compliance