6A52

Oxidase ChaP-H1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Molecular Basis for the Final Oxidative Rearrangement Steps in Chartreusin Biosynthesis.

Wang, Y.S.Zhang, B.Zhu, J.Yang, C.L.Guo, Y.Liu, C.L.Liu, F.Huang, H.Zhao, S.Liang, Y.Jiao, R.H.Tan, R.X.Ge, H.M.

(2018) J. Am. Chem. Soc. 140: 10909-10914

  • DOI: 10.1021/jacs.8b06623
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Oxidative rearrangements play key roles in introducing structural complexity and biological activities of natural products biosynthesized by type II polyketide synthases (PKSs). Chartreusin (1) is a potent antitumor polyketide that contains a unique ...

    Oxidative rearrangements play key roles in introducing structural complexity and biological activities of natural products biosynthesized by type II polyketide synthases (PKSs). Chartreusin (1) is a potent antitumor polyketide that contains a unique rearranged pentacyclic aromatic bilactone aglycone derived from a type II PKS. Herein, we report an unprecedented dioxygenase, ChaP, that catalyzes the final α-pyrone ring formation in 1 biosynthesis using flavin-activated oxygen as an oxidant. The X-ray crystal structures of ChaP and two homologues, docking studies, and site-directed mutagenesis provided insights into the molecular basis of the oxidative rearrangement that involves two successive C-C bond cleavage steps followed by lactonization. ChaP is the first example of a dioxygenase that requires a flavin-activated oxygen as a substrate despite lacking flavin binding sites, and represents a new class in the vicinal oxygen chelate enzyme superfamily.


    Organizational Affiliation

    State Key Laboratory of Pharmaceutical Biotechnology, Institute of Functional Biomolecules, School of Life Sciences , Nanjing University , Nanjing 210023 , China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
dioxidase ChaP-H1
A, B
128N/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
FE2
Query on FE2

Download SDF File 
Download CCD File 
A, B
FE (II) ION
Fe
CWYNVVGOOAEACU-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.194 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 43.610α = 90.00
b = 49.940β = 96.79
c = 59.330γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
Aimlessdata scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2018-06-21 
  • Released Date: 2018-08-29 
  • Deposition Author(s): Zhang, B., Ge, H.M.

Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina21572100, 81522042, 81773591, 81421091, 81500059, 81673333, 21672101, and 21661140001

Revision History 

  • Version 1.0: 2018-08-29
    Type: Initial release
  • Version 1.1: 2018-09-19
    Type: Data collection, Database references