3QH1

Structure of Thermolysin in complex with N-benzyloxycarbonyl-L-aspartic acid

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.150 
  • R-Value Work: 0.113 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Synthesis of Aspartame by Thermolysin: An X-ray Structural Study.

Birrane, G., Bhyravbhatla, B., Navia, M.A.

(2014) ACS MED.CHEM.LETT. 5: 706-710

  • DOI: 10.1021/ml500101z
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Protease mediated peptide synthesis (PMPS) was first described in the 1930s but remains underexploited today. In most PMPS, the reaction equilibrium is shifted toward synthesis by the aqueous insolubility of product generated. Substrates and protease ...

    Protease mediated peptide synthesis (PMPS) was first described in the 1930s but remains underexploited today. In most PMPS, the reaction equilibrium is shifted toward synthesis by the aqueous insolubility of product generated. Substrates and proteases are selected by trial and error, yields are modest, and reaction times are slow. Once implemented, however, PMPS reactions can be simple, environmentally benign, and readily scalable to a commercial level. We examined the PMPS of a precursor of the artificial sweetener aspartame, a multiton peptide synthesis catalyzed by the enzyme thermolysin. X-ray structures of thermolysin in complex with aspartame substrates separately, and after PMPS in a crystal, rationalize the reaction's substrate preferences and reveal an unexpected form of substrate inhibition that explains its sluggishness. Structure guided optimization of this and other PMPS reactions could expand the economic viability of commercial peptides beyond current high-potency, low-volume therapeutics, with substantial green chemistry advantages.

    Organizational Affiliation: 

    Division of Experimental Medicine, Beth Israel Deaconess Medical Center , Boston, Massachusetts 02215, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thermolysin
A
316Bacillus thermoproteolyticusMutation(s): 0 
Gene Names: npr
EC: 3.4.24.27
Find proteins for P00800 (Bacillus thermoproteolyticus)
Go to UniProtKB:  P00800
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN
Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA
Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
NX6
Query on NX6
Download SDF File 
Download CCD File 
A
N-[(benzyloxy)carbonyl]-L-aspartic acid
C12 H13 N O6
XYXYXSKSTZAEJW-VIFPVBQESA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.150 
  • R-Value Work: 0.113 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 92.503α = 90.00
b = 92.503β = 90.00
c = 130.102γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
CBASSdata collection
MOLREPphasing
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-01-04
    Type: Initial release
  • Version 1.1: 2014-04-30
    Type: Database references
  • Version 1.2: 2014-07-02
    Type: Database references