Biological Assembly 1  

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

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

Macromolecule Content

• Total Structure Weight: 68.12 kDa 
• Atom Count: 4,607 
• Modelled Residue Count: 586 
• Deposited Residue Count: 622 
• Unique protein chains: 1

 2C7B

The Crystal Structure of EstE1, a New Thermophilic and Thermostable Carboxylesterase Cloned from a Metagenomic Library

• PDB DOI:  https://doi.org/10.2210/pdb2C7B/pdb

• Classification: HYDROLASE
• Organism(s): uncultured archaeon
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2005-11-21 Released: 2005-12-01 
• Deposition Author(s): Byun, J.-S., Rhee, J.-K., Kim, D.-U., Oh, J.-W., Cho, H.-S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.261 
• R-Value Work: 0.234 
• R-Value Observed: 0.234 

Literature

Crystal Structure of Hyperthermophilic Esterase Este1 and the Relationship between its Dimerization and Thermostability Properties.

Byun, J.-S., Rhee, J.-K., Kim, N.D., Yoon, J., Kim, D.-U., Koh, E., Oh, J.-W., Cho, H.-S.

(2007) BMC Struct Biol 7: 47

• PubMed: 17625021 
• DOI: https://doi.org/10.1186/1472-6807-7-47
• Primary Citation of Related Structures:  
  2C7B


• PubMed Abstract: 
  

EstE1 is a hyperthermophilic esterase belonging to the hormone-sensitive lipase family and was originally isolated by functional screening of a metagenomic library constructed from a thermal environmental sample. Dimers and oligomers may have been evolutionally selected in thermophiles because intersubunit interactions can confer thermostability on the proteins. The molecular mechanisms of thermostabilization of this extremely thermostable esterase are not well understood due to the lack of structural information.

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Organizational Affiliation: 

Department of Biology, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul, Korea. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CARBOXYLESTERASE	A, B	311	uncultured archaeon	Mutation(s): 0  EC: 3.1.1.1
UniProt
Find proteins for Q5G935 (Uncultured archaeon) Explore Q5G935  Go to UniProtKB:  Q5G935

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A, B	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.261 
• R-Value Work: 0.234 
• R-Value Observed: 0.234 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 73.71	α = 90
b = 73.71	β = 90
c = 234.23	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
MOSFLM	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-12-01 
Deposition Author(s): Byun, J.-S., Rhee, J.-K., Kim, D.-U., Oh, J.-W., Cho, H.-S.

Revision History  

• Version 1.0: 2005-12-01
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance