6TM4

NatL2 in complex with two molecules of salicylic acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.89 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.198 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

The Biosynthesis of the Benzoxazole in Nataxazole Proceeds via an Unstable Ester and has Synthetic Utility.

Song, H.Rao, C.Deng, Z.Yu, Y.Naismith, J.H.

(2020) Angew Chem Int Ed Engl 59: 6054-6061

  • DOI: https://doi.org/10.1002/anie.201915685
  • Primary Citation of Related Structures:  
    6SIW, 6SIX, 6SIY, 6SIZ, 6SJ0, 6SJ1, 6SJ2, 6SJ3, 6SJ4, 6TM4

  • PubMed Abstract: 

    Heterocycles, a class of molecules that includes oxazoles, constitute one of the most common building blocks in current pharmaceuticals and are common in medicinally important natural products. The antitumor natural product nataxazole is a model for a large class of benzoxazole-containing molecules that are made by a pathway that is not characterized. We report structural, biochemical, and chemical evidence that benzoxazole biosynthesis proceeds through an ester generated by an ATP-dependent adenylating enzyme. The ester rearranges via a tetrahedral hemiorthoamide to yield an amide, which is a shunt product and not, as previously thought, an intermediate in the pathway. A second zinc-dependent enzyme catalyzes the formation of hemiorthoamide from the ester but, by shuttling protons, the enzyme eliminates water, a reverse hydrolysis reaction, to yield the benzoxazole and avoids the amide. These insights have allowed us to harness the pathway to synthesize a series of novel halogenated benzoxazoles.


  • Organizational Affiliation

    Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), School of Pharmaceutical Sciences, Wuhan University, 185 East Lake Road, Wuhan, 430071, P. R. China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PaaK-like ligase (AMP-dependent synthetase and ligase)A [auth AAA]436Streptomyces sp. Tu 6176Mutation(s): 0 
Gene Names: natL2CF54_07380
UniProt
Find proteins for A0A022MRT4 (Streptomyces sp. Tu 6176)
Explore A0A022MRT4 
Go to UniProtKB:  A0A022MRT4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A022MRT4
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
PaaK-like ligase (AMP-dependent synthetase and ligase)B [auth BBB]437Streptomyces sp. Tu 6176Mutation(s): 0 
Gene Names: natL2CF54_07380
UniProt
Find proteins for A0A022MRT4 (Streptomyces sp. Tu 6176)
Explore A0A022MRT4 
Go to UniProtKB:  A0A022MRT4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A022MRT4
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
AMP (Subject of Investigation/LOI)
Query on AMP

Download Ideal Coordinates CCD File 
G [auth BBB]ADENOSINE MONOPHOSPHATE
C10 H14 N5 O7 P
UDMBCSSLTHHNCD-KQYNXXCUSA-N
SAL (Subject of Investigation/LOI)
Query on SAL

Download Ideal Coordinates CCD File 
C [auth AAA],
D [auth AAA],
H [auth BBB],
I [auth BBB]
2-HYDROXYBENZOIC ACID
C7 H6 O3
YGSDEFSMJLZEOE-UHFFFAOYSA-N
ZN
Query on ZN

Download Ideal Coordinates CCD File 
E [auth AAA],
J [auth BBB]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
F [auth AAA],
K [auth BBB]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.89 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.198 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 107.46α = 90
b = 139.24β = 90
c = 129.66γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
xia2data reduction
xia2data scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-01-15
    Type: Initial release
  • Version 1.1: 2020-02-19
    Changes: Database references
  • Version 1.2: 2020-04-08
    Changes: Database references
  • Version 1.3: 2024-01-24
    Changes: Data collection, Database references, Derived calculations, Refinement description