7Z64

A GH18 from haloalkaliphilic bacterium unveils environment-dependent variations in the catalytic machinery of chitinases

• PDB DOI: https://doi.org/10.2210/pdb7Z64/pdb

• Classification: HYDROLASE
• Organism(s): Chitinivibrio alkaliphilus ACht1
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2022-03-10 Released: 2024-01-17 
• Deposition Author(s): Madhuprakash, J., Dalhus, B., Rohr, A.K., Bissaro, B., Vaaje-Kolstad, G., Sorlie, M., Eijsink, V.G.
• Funding Organization(s): Science and Engineering Research Board (SERB), Department of Science & Technology (DST, India)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.31 Å
• R-Value Free: 0.166 
• R-Value Work: 0.148 
• R-Value Observed: 0.149 

Literature

A GH18 from haloalkaliphilic bacterium unveils environment-dependent variations in the catalytic machinery of chitinases

Madhuprakash, J., Dalhus, B., Rohr, A.K., Bissaro, B., Vaaje-Kolstad, G., Sorlie, M., Eijsink, V.G.H.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 64.88 kDa 
• Atom Count: 5,454 
• Modelled Residue Count: 556 
• Deposited Residue Count: 556 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chitinase, GH18 family	A, B	278	Chitinivibrio alkaliphilus ACht1	Mutation(s): 0  Gene Names: CALK_0774
UniProt
Find proteins for U7D706 (Chitinivibrio alkaliphilus ACht1) Explore U7D706  Go to UniProtKB:  U7D706

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	C, D	6		N/A
Glycosylation Resources
GlyTouCan:  G36414FS GlyCosmos:  G36414FS GlyGen:  G36414FS

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EDO	E [auth A], F [auth A], G [auth A], I [auth B], J [auth B], K [auth B]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
NA	H [auth A], L [auth B]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.31 Å
• R-Value Free: 0.166 
• R-Value Work: 0.148 
• R-Value Observed: 0.149 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 65.97	α = 90
b = 62.42	β = 102.75
c = 102.65	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
XDS	data scaling
PHENIX	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-01-17 
Deposition Author(s): Madhuprakash, J., Dalhus, B., Rohr, A.K., Bissaro, B., Vaaje-Kolstad, G., Sorlie, M., Eijsink, V.G.

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Funding Organization	Location	Grant Number
Science and Engineering Research Board (SERB)	India	CRG/2019/006426
Department of Science & Technology (DST, India)	India	IFA16-LSPA-40

Revision History  

• Version 1.0: 2024-01-17
  Type: Initial release