7FD6

Crystal structure of SmChiA in complex with 6a

• PDB DOI: https://doi.org/10.2210/pdb7FD6/pdb

• Classification: HYDROLASE
• Organism(s): Serratia marcescens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2021-07-16 Released: 2022-07-20 
• Deposition Author(s): Xi, J., Qing, Y.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.79 Å
• R-Value Free: 0.190 
• R-Value Work: 0.166 
• R-Value Observed: 0.167 

Literature

Discovery of Conformation Constrained Tetracyclic Compounds as potent Chitinase OfChi-h inhibitor with novel binding mode

Pengtao, Y., Xi, J.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 60.13 kDa 
• Atom Count: 4,902 
• Modelled Residue Count: 538 
• Deposited Residue Count: 548 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chitinase A	A	548	Serratia marcescens	Mutation(s): 0  Gene Names: chiA, PWN146_04604 EC: 3.2.1.14
UniProt
Find proteins for P07254 (Serratia marcescens) Explore P07254  Go to UniProtKB:  P07254

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
4QU (Subject of Investigation/LOI)	B [auth A]	11-methyl-3-(pyridin-3-ylmethyl)-4H-pyrimido[5'',4'':5',6']pyrido[2',3':4,5]pyrimido[1,2-b]pyridine-4,6(3H)-dione C20 H14 N6 O2 BFJYZGRLIJMXES-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.79 Å
• R-Value Free: 0.190 
• R-Value Work: 0.166 
• R-Value Observed: 0.167 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 132.525	α = 90
b = 202.186	β = 90
c = 59.43	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-3000	data reduction
HKL-3000	data scaling
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2022-07-20 
Deposition Author(s): Xi, J., Qing, Y.

Revision History  

• Version 1.0: 2022-07-20
  Type: Initial release
  
• Version 1.1: 2023-11-29
  Changes: Data collection, Refinement description