5F5L

The structure of monooxygenase KstA11 in the biosynthetic pathway of kosinostatin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.177 
  • R-Value Work: 0.129 
  • R-Value Observed: 0.131 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Hydroxyl regioisomerization of anthracycline catalyzed by a four-enzyme cascade

Zhang, Z.Gong, Y.-K.Zhou, Q.Hu, Y.Ma, H.-M.Chen, Y.-S.Igarashi, Y.Pan, L.Tang, G.-L.

(2017) Proc Natl Acad Sci U S A 114: 1554-1559

  • DOI: 10.1073/pnas.1610097114
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Ranking among the most effective anticancer drugs, anthracyclines represent an important family of aromatic polyketides generated by type II polyketide synthases (PKSs). After formation of polyketide cores, the post-PKS tailoring modifications endow ...

    Ranking among the most effective anticancer drugs, anthracyclines represent an important family of aromatic polyketides generated by type II polyketide synthases (PKSs). After formation of polyketide cores, the post-PKS tailoring modifications endow the scaffold with various structural diversities and biological activities. Here we demonstrate an unprecedented four-enzyme-participated hydroxyl regioisomerization process involved in the biosynthesis of kosinostatin. First, KstA15 and KstA16 function together to catalyze a cryptic hydroxylation of the 4-hydroxyl-anthraquinone core, yielding a 1,4-dihydroxyl product, which undergoes a chemically challenging asymmetric reduction-dearomatization subsequently acted by KstA11; then, KstA10 catalyzes a region-specific reduction concomitant with dehydration to afford the 1-hydroxyl anthraquinone. Remarkably, the shunt product identifications of both hydroxylation and reduction-dehydration reactions, the crystal structure of KstA11 with bound substrate and cofactor, and isotope incorporation experiments reveal mechanistic insights into the redox dearomatization and rearomatization steps. These findings provide a distinguished tailoring paradigm for type II PKS engineering.


    Organizational Affiliation

    State Key Laboratory of Bio-organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China; gltang@sioc.ac.cn panlf@sioc.ac.cn.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Monooxygenase
A
290Micromonospora sp. TP-A0468Mutation(s): 0 
Find proteins for A0A023GUL3 (Micromonospora sp. TP-A0468)
Go to UniProtKB:  A0A023GUL3
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DTT
Query on DTT

Download CCD File 
A
2,3-DIHYDROXY-1,4-DITHIOBUTANE
C4 H10 O2 S2
VHJLVAABSRFDPM-IMJSIDKUSA-N
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.177 
  • R-Value Work: 0.129 
  • R-Value Observed: 0.131 
  • Space Group: P 4 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.748α = 90
b = 93.748β = 90
c = 71.182γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data processing
Cootmodel building
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2015-12-04 
  • Released Date: 2016-12-21 
  • Deposition Author(s): Pan, L., Gong, Y.

Funding OrganizationLocationGrant Number
National Basic Research Program of ChinaChina2013CB836900
a Shanghai Rising Star Scholar awardChina13QA1404300

Revision History 

  • Version 1.0: 2016-12-21
    Type: Initial release
  • Version 1.1: 2017-02-08
    Changes: Database references
  • Version 1.2: 2017-03-01
    Changes: Database references