8HNE

Crystal structure of the ancestral GH19 chitinase Anc4

• PDB DOI: https://doi.org/10.2210/pdb8HNE/pdb

• Classification: HYDROLASE
• Organism(s): synthetic construct
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2022-12-07 Released: 2023-12-13 
• Deposition Author(s): Kozome, D., Laurino, P.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.13 Å
• R-Value Free: 0.251 
• R-Value Work: 0.241 
• R-Value Observed: 0.241 

Literature

Emergence of antifungal activity in GH19 chitinases through gain-of-function in a remote loop.

Kozome, D., Laurino, P.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 24.69 kDa 
• Atom Count: 1,955 
• Modelled Residue Count: 219 
• Deposited Residue Count: 219 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Anc4, ancestral GH19 chitinase	A	219	synthetic construct	Mutation(s): 0

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
1PG (Subject of Investigation/LOI)	D [auth A]	2-(2-{2-[2-(2-METHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHANOL C11 H24 O6 SLNYBUIEAMRFSZ-UHFFFAOYSA-N
MES (Subject of Investigation/LOI)	B [auth A], C [auth A]	2-(N-MORPHOLINO)-ETHANESULFONIC ACID C6 H13 N O4 S SXGZJKUKBWWHRA-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.13 Å
• R-Value Free: 0.251 
• R-Value Work: 0.241 
• R-Value Observed: 0.241 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 32.14	α = 90
b = 76.24	β = 90
c = 78.93	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2023-12-13 
Deposition Author(s): Kozome, D., Laurino, P.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2023-12-13
  Type: Initial release