4MNM

Crystal Structure of GH18 Chitinase (G77W/E119Q mutant) from Cycas revoluta in complex with (GlcNAc)4

• PDB DOI: https://doi.org/10.2210/pdb4MNM/pdb

• Classification: HYDROLASE
• Organism(s): Cycas revoluta
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2013-09-11 Released: 2014-09-17 
• Deposition Author(s): Umemoto, N., Numata, T., Ohnuma, T., Osawa, T., Taira, T., Fukamizo, T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.217 
• R-Value Work: 0.191 
• R-Value Observed: 0.192 

Literature

Crystal Structure of GH18 Chitinase from Cycad, Cycas revoluta

Umemoto, N., Numata, T., Ohnuma, T., Osawa, T., Taira, T., Fukamizo, T.

To be published.

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 39.4 kDa 
• Atom Count: 2,960 
• Modelled Residue Count: 344 
• Deposited Residue Count: 348 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chitinase A	A	348	Cycas revoluta	Mutation(s): 2  Gene Names: crchiA EC: 3.2.1.14
UniProt
Find proteins for Q4W6L6 (Cycas revoluta) Explore Q4W6L6  Go to UniProtKB:  Q4W6L6

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	C [auth A]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
SO4	D [auth A], E [auth A], F [auth A], G [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
EDO	B [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.217 
• R-Value Work: 0.191 
• R-Value Observed: 0.192 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 58.54	α = 90
b = 64.5	β = 90
c = 86.024	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
MOLREP	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-09-17 
Deposition Author(s): Umemoto, N., Numata, T., Ohnuma, T., Osawa, T., Taira, T., Fukamizo, T.

Revision History  

• Version 1.0: 2014-09-17
  Type: Initial release
  
• Version 1.1: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Database references, Derived calculations, Structure summary
• Version 1.2: 2023-11-08
  Changes: Data collection, Database references, Refinement description, Structure summary