9U5L | pdb_00009u5l

4-alpha-glucanotransferase from Thermus thermophilus STB20

• PDB DOI: https://doi.org/10.2210/pdb9U5L/pdb

• Classification: TRANSFERASE
• Organism(s): Thermus thermophilus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2025-03-21 Released: 2025-04-23 
• Deposition Author(s): Li, Z.F., Tian, Y.X., Xiao, Y., Ban, X.F.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 
  0.316 (Depositor), 0.311 (DCC) 
• R-Value Work: 
  0.264 (Depositor), 0.262 (DCC) 
• R-Value Observed: 
  0.267 (Depositor) 

Starting Model: experimental

Literature

The X-ray Crystallographic Structure of 4-alpha-glycosyltransferase from Thermus thermophilus STB20

Li, Z.F., Tian, Y.X., Xiao, Y., Ban, X.F.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: native gel electrophoresis

Macromolecule Content 

• Total Structure Weight: 57.4 kDa 
• Atom Count: 4,205 
• Modeled Residue Count: 496 
• Deposited Residue Count: 500 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
4-alpha-glucanotransferase	A	500	Thermus thermophilus	Mutation(s): 0  Gene Names: malQ EC: 2.4.1.25
UniProt
Find proteins for O87172 (Thermus thermophilus) Explore O87172  Go to UniProtKB:  O87172

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free:  0.316 (Depositor), 0.311 (DCC) 
• R-Value Work:  0.264 (Depositor), 0.262 (DCC) 
• R-Value Observed: 0.267 (Depositor) 

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 197.783	α = 90
b = 41.391	β = 98.26
c = 58.458	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XSCALE	data scaling
XDS	data reduction
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-04-23 
Deposition Author(s): Li, Z.F., Tian, Y.X., Xiao, Y., Ban, X.F.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32472281

Revision History  

• Version 1.0: 2025-04-23
  Type: Initial release