5YPT

Crystal structure of Marchantia paleacea chalone synthase like 1 (CHSL1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.39 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.197 

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Literature

Structural and biochemical characterization of the plant type III polyketide synthases of the liverwort Marchantia paleacea.

Yu, H.N.Liu, X.Y.Gao, S.Sun, B.Zheng, H.B.Ji, M.Cheng, A.X.Lou, H.X.

(2018) Plant Physiol Biochem 125: 95-105

  • DOI: 10.1016/j.plaphy.2018.01.030
  • Primary Citation of Related Structures:  
    5YPT

  • PubMed Abstract: 
  • Chalcone synthases (CHSs) of the type III polyketide synthases (PKSs), catalyze the formation of a tetraketide intermediate from a CoA-tethered starter and malonyl-CoA but use different cyclization mechanisms to produce distinct chemical scaffolds. Herein, we characterized CHS and CHS-like enzymes (designated MpCHS and MpCHSL1, 2 and 3) from Marchantia paleacea and determined the crystal structure of MpCHSL1 ...

    Chalcone synthases (CHSs) of the type III polyketide synthases (PKSs), catalyze the formation of a tetraketide intermediate from a CoA-tethered starter and malonyl-CoA but use different cyclization mechanisms to produce distinct chemical scaffolds. Herein, we characterized CHS and CHS-like enzymes (designated MpCHS and MpCHSL1, 2 and 3) from Marchantia paleacea and determined the crystal structure of MpCHSL1. MpCHS catalyzed a Claisen condensation to form chalcone, while MpCHSLs catalyzed the formation of lactonized α-pyrones in vitro. Based on the structural, mutational and in vitro biochemical analyses, we established that MpCHSL1 is structurally and functionally closer to prototype CHS than stilbene synthase, and characterized the structural basis for the functional diversity of the type III PKSs. A chalcone-forming mutant of MpCHSL1 was build directed by the structural information. These findings pave the way for future studies to elucidate the functional diversity of type III PKSs in liverwort.


    Organizational Affiliation

    Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China. Electronic address: louhongxiang@sdu.edu.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Stilbenecarboxylate synthase 1A, B, C, D, E, F429Marchantia polymorphaMutation(s): 0 
Gene Names: STCS1
UniProt
Find proteins for Q5I6Y2 (Marchantia polymorpha)
Explore Q5I6Y2 
Go to UniProtKB:  Q5I6Y2
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.39 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.197 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 128.183α = 90
b = 74.581β = 104.04
c = 262.155γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2017-11-03 
  • Released Date: 2018-07-04 
  • Deposition Author(s): Lou, H.X., Yu, H.

Revision History  (Full details and data files)

  • Version 1.0: 2018-07-04
    Type: Initial release