7ESH

Crystal structure of amylosucrase from Calidithermus timidus

• PDB DOI: https://doi.org/10.2210/pdb7ESH/pdb

• Classification: TRANSFERASE
• Organism(s): Calidithermus timidus DSM 17022
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2021-05-10 Released: 2022-05-18 
• Deposition Author(s): Tian, Y., Hou, X., Ni, D., Xu, W., Guang, C., Zhang, W., Rao, Y., Mu, W.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.29 Å
• R-Value Free: 0.228 
• R-Value Work: 0.192 
• R-Value Observed: 0.194 

Literature

Structure-based interface engineering methodology in designing a thermostable amylose-forming transglucosylase

Tian, Y., Hou, X., Ni, D., Xu, W., Guang, C., Zhang, W., Chen, Q., Rao, Y., Mu, W.

(2022) J Biol Chem 298: 102074

• DOI: https://doi.org/10.1016/j.jbc.2022.102074

Biological Assembly 1  

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

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

Biological Assembly Evidence: gel filtration, light scattering

Macromolecule Content

• Total Structure Weight: 302.07 kDa 
• Atom Count: 21,669 
• Modelled Residue Count: 2,584 
• Deposited Residue Count: 2,624 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
amylosucrase	A, B, C, D	656	Calidithermus timidus DSM 17022	Mutation(s): 0  EC: 2.4.1.4

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
TRS	E [auth A], F [auth B], G [auth C], H [auth D]	2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL C4 H12 N O3 LENZDBCJOHFCAS-UHFFFAOYSA-O

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.29 Å
• R-Value Free: 0.228 
• R-Value Work: 0.192 
• R-Value Observed: 0.194 
• Space Group: P 2 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 105.75	α = 90
b = 126.66	β = 90
c = 294.73	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data scaling
PDB_EXTRACT	data extraction
MOLREP	phasing
HEK-2000	data reduction

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2022-05-18 
Deposition Author(s): Tian, Y., Hou, X., Ni, D., Xu, W., Guang, C., Zhang, W., Rao, Y., Mu, W.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	31922073

Revision History  

• Version 1.0: 2022-05-18
  Type: Initial release
  
• Version 1.1: 2022-07-13
  Changes: Database references, Structure summary
• Version 1.2: 2023-11-29
  Changes: Data collection, Refinement description