3QH5

Structure of Thermolysin in complex with N-Carbobenzyloxy-L-aspartic acid and L-Phenylalanine Methyl Ester


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.144 
  • R-Value Observed: 0.146 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.4 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: https://doi.org/10.1021/ml500101z
  • Primary Citation of Related Structures:  
    3QGO, 3QH1, 3QH5

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Thermolysin316Bacillus thermoproteolyticusMutation(s): 0 
EC: 3.4.24.27
UniProt
Find proteins for P00800 (Bacillus thermoproteolyticus)
Explore P00800 
Go to UniProtKB:  P00800
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00800
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NX6
Query on NX6

Download Ideal Coordinates CCD File 
I [auth A]N-[(benzyloxy)carbonyl]-L-aspartic acid
C12 H13 N O6
XYXYXSKSTZAEJW-VIFPVBQESA-N
PG4
Query on PG4

Download Ideal Coordinates CCD File 
J [auth A]TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
0A9
Query on 0A9

Download Ideal Coordinates CCD File 
G [auth A],
H [auth A]
methyl L-phenylalaninate
C10 H13 N O2
VSDUZFOSJDMAFZ-VIFPVBQESA-N
PEG
Query on PEG

Download Ideal Coordinates CCD File 
K [auth A],
L [auth A],
M [auth A]
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
ZN
Query on ZN

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

Download Ideal Coordinates CCD File 
B [auth A],
C [auth A],
D [auth A],
E [auth A]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.144 
  • R-Value Observed: 0.146 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.686α = 90
b = 92.686β = 90
c = 128.764γ = 120
Software Package:
Software NamePurpose
ADSCdata collection
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-01-04
    Type: Initial release
  • Version 1.1: 2014-04-30
    Changes: Database references
  • Version 1.2: 2014-07-02
    Changes: Database references
  • Version 1.3: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description
  • Version 1.4: 2023-12-06
    Changes: Data collection