4CG2

Structural and functional studies on a thermostable polyethylene terephthalate degrading hydrolase from Thermobifida fusca

• PDB DOI: https://doi.org/10.2210/pdb4CG2/pdb

• Classification: HYDROLASE
• Organism(s): Thermobifida fusca
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2013-11-20 Released: 2014-06-25 
• Deposition Author(s): Roth, C., Wei, R., Oeser, T., Then, J., Foellner, C., Zimmermann, W., Straeter, N.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.44 Å
• R-Value Free: 0.166 
• R-Value Work: 0.138 
• R-Value Observed: 0.141 

Starting Model: experimental

Literature

Structural and Functional Studies on a Thermostable Polyethylene Terephthalate Degrading Hydrolase from Thermobifida Fusca.

Roth, C., Wei, R., Oeser, T., Then, J., Follner, C., Zimmermann, W., Strater, N.

(2014) Appl Microbiol Biotechnol 98: 7815

• PubMed: 24728714 
• DOI: https://doi.org/10.1007/s00253-014-5672-0
• Primary Citation of Related Structures:  
  4CG1, 4CG2, 4CG3


• PubMed Abstract: 
  

  Bacterial cutinases are promising catalysts for the modification and degradation of the widely used plastic polyethylene terephthalate (PET). The improvement of the enzyme for industrial purposes is limited due to the lack of structural information for cutinases of bacterial origin. We have crystallized and structurally characterized a cutinase from Thermobifida fusca KW3 (TfCut2) in free as well as in inhibitor-bound form. Together with our analysis of the thermal stability and modelling studies, we suggest possible reasons for the outstanding thermostability in comparison to the less thermostable homolog from Thermobifida alba AHK119 and propose a model for the binding of the enzyme towards its polymeric substrate. The TfCut2 structure is the basis for the rational design of catalytically more efficient enzyme variants for the hydrolysis of PET and other synthetic polyesters.

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Organizational Affiliation: 

Institut für Bioanalytische Chemie, Fakultät für Chemie und Mineralogie, Universität Leipzig, Leipzig, Germany, [e-mail].

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: 31.19 kDa 
• Atom Count: 2,399 
• Modelled Residue Count: 261 
• Deposited Residue Count: 282 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CUTINASE	A	282	Thermobifida fusca	Mutation(s): 0  EC: 3.1.1.74 (PDB Primary Data), 3.1.1.101 (UniProt)
UniProt
Find proteins for Q6A0I4 (Thermobifida fusca) Explore Q6A0I4  Go to UniProtKB:  Q6A0I4

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PMS	B [auth A]	phenylmethanesulfonic acid C7 H8 O3 S NIXKBAZVOQAHGC-UHFFFAOYSA-N
SO4	C [auth A], D [auth A], E [auth A], F [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.44 Å
• R-Value Free: 0.166 
• R-Value Work: 0.138 
• R-Value Observed: 0.141 
• Space Group: I 4₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 116.591	α = 90
b = 116.591	β = 90
c = 35.581	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-06-25 
Deposition Author(s): Roth, C., Wei, R., Oeser, T., Then, J., Foellner, C., Zimmermann, W., Straeter, N.

Revision History  

• Version 1.0: 2014-06-25
  Type: Initial release
  
• Version 1.1: 2014-09-10
  Changes: Database references
• Version 2.0: 2019-10-23
  Changes: Atomic model, Data collection, Derived calculations, Other
• Version 2.1: 2023-12-20
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 2.2: 2024-11-06
  Changes: Structure summary