6CJN

Crystal Structure of Chalcone Isomerase from Medicago Sativa with the G95T mutation

• PDB DOI: https://doi.org/10.2210/pdb6CJN/pdb

• Classification: plant protein, isomerase
• Organism(s): Medicago sativa
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2018-02-26 Released: 2019-03-13 
• Deposition Author(s): Burke, J.R., La Clair, J.J., Philippe, R.N., Pabis, A., Jez, J.M., Cortina, G., Kaltenbach, M., Bowman, M.E., Woods, K.B., Nelson, A.T., Tawfik, D.S., Kamerlin, S.C.L., Noel, J.P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.240 
• R-Value Work: 0.211 
• R-Value Observed: 0.212 

Literature

Bifunctional Substrate Activation via an Arginine Residue Drives Catalysis in Chalcone Isomerases

Burke, J.R., La Clair, J.J., Philippe, R.N., Pabis, A., Jez, J.M., Cortina, G., Kaltenbach, M., Bowman, M.E., Woods, K.B., Nelson, A.T., Tawfik, D.S., Kamerlin, S.C.L., Noel, J.P.

(2019) ACS Catal 

• DOI: https://doi.org/10.1021/acscatal.9b01926

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 48.93 kDa 
• Atom Count: 3,426 
• Modelled Residue Count: 438 
• Deposited Residue Count: 450 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chalcone--flavonone isomerase 1	A, B	225	Medicago sativa	Mutation(s): 1  Gene Names: CHI1, CHI-1 EC: 5.5.1.6
UniProt
Find proteins for P28012 (Medicago sativa) Explore P28012  Go to UniProtKB:  P28012

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth A], D [auth A], E [auth A], F [auth B], G [auth B], H [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.240 
• R-Value Work: 0.211 
• R-Value Observed: 0.212 
• Space Group: P 6₅ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 90.82	α = 90
b = 90.82	β = 90
c = 352.423	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2019-03-13 
Deposition Author(s): Burke, J.R., La Clair, J.J., Philippe, R.N., Pabis, A., Jez, J.M., Cortina, G., Kaltenbach, M., Bowman, M.E., Woods, K.B., Nelson, A.T., Tawfik, D.S., Kamerlin, S.C.L., Noel, J.P.

Revision History  

• Version 1.0: 2019-03-13
  Type: Initial release
  
• Version 1.1: 2019-08-28
  Changes: Data collection, Database references
• Version 1.2: 2024-03-13
  Changes: Data collection, Database references