1K9T | pdb_00001k9t

Chitinase a complexed with tetra-N-acetylchitotriose

• PDB DOI: https://doi.org/10.2210/pdb1K9T/pdb

• Classification: HYDROLASE
• Organism(s): Serratia marcescens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2001-10-30 Released: 2002-11-06 
• Deposition Author(s): Prag, G., Tucker, P.A., Oppenheim, A.B.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 
  0.221 (Depositor), 0.211 (DCC) 
• R-Value Work: 
  0.180 (Depositor) 
• R-Value Observed: 
  0.189 (Depositor) 

Starting Model: experimental

Literature

Complex Structures of Chitinase A Mutant with Oligonag Provide Insight Into the Enzymatic Mechanism

Prag, G., Tucker, P.A., Oppenheim, A.B.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content 

• Total Structure Weight: 59.43 kDa 
• Atom Count: 4,977 
• Modeled Residue Count: 538 
• Deposited Residue Count: 540 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CHITINASE A	A	540	Serratia marcescens	Mutation(s): 1  Gene Names: CHIA EC: 3.2.1.14
UniProt
Find proteins for P07254 (Serratia marcescens) Explore P07254  Go to UniProtKB:  P07254

Oligosaccharides

Help  

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	D 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	B	4		N/A
Glycosylation Resources
GlyTouCan: G01361SX GlyCosmos: G01361SX GlyGen: G01361SX

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free:  0.221 (Depositor), 0.211 (DCC) 
• R-Value Work:  0.180 (Depositor) 
• R-Value Observed: 0.189 (Depositor) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 199.853	α = 90
b = 131.907	β = 90
c = 59.539	γ = 90

Software Package:

Software Name	Purpose
XDS	data scaling
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
REFMAC	refinement
XDS	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2002-11-06 
Deposition Author(s): Prag, G., Tucker, P.A., Oppenheim, A.B.

Revision History  

• Version 1.0: 2002-11-06
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary
• Version 2.1: 2021-11-10
  Changes: Database references, Structure summary
• Version 2.2: 2023-10-25
  Changes: Data collection, Refinement description
• Version 2.3: 2024-10-16
  Changes: Structure summary