1HKI

Crystal structure of human chitinase in complex with glucoallosamidin B

• PDB DOI: https://doi.org/10.2210/pdb1HKI/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 2003-03-10 Released: 2004-03-11 
• Deposition Author(s): Rao, F.V., Houston, D.R., Boot, R.G., Aerts, J.M.F.G., Sakuda, S., Van Aalten, D.M.F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.55 Å
• R-Value Free: 0.267 
• R-Value Work: 0.223 
• R-Value Observed: 0.223 

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 41.42 kDa 
• Atom Count: 2,983 
• Modelled Residue Count: 365 
• Deposited Residue Count: 365 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CHITOTRIOSIDASE	A	365	Homo sapiens	Mutation(s): 0  EC: 3.2.1.14
UniProt & NIH Common Fund Data Resources
Find proteins for Q13231 (Homo sapiens) Explore Q13231  Go to UniProtKB:  Q13231
PHAROS:  Q13231 GTEx:  ENSG00000133063

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
2-acetamido-2-deoxy-6-O-methyl-alpha-D-allopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	B	2		N/A
Glycosylation Resources
GlyTouCan:  G44921CH GlyCosmos:  G44921CH

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ALI	C [auth A]	METHYL N-ACETYL ALLOSAMINE C8 H12 N2 O4 YJMIXNAZGREWGZ-GKHCUFPYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.55 Å
• R-Value Free: 0.267 
• R-Value Work: 0.223 
• R-Value Observed: 0.223 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 94.142	α = 90
b = 94.142	β = 90
c = 88.425	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-03-11 
Deposition Author(s): Rao, F.V., Houston, D.R., Boot, R.G., Aerts, J.M.F.G., Sakuda, S., Van Aalten, D.M.F.

Revision History  

• Version 1.0: 2004-03-11
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2019-07-24
  Changes: Advisory, Data collection, Derived calculations
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Other, Structure summary
• Version 2.1: 2023-12-13
  Changes: Advisory, Data collection, Database references, Refinement description, Structure summary