1CGT

STRUCTURE OF CYCLODEXTRIN GLYCOSYLTRANSFERASE REFINED AT 2.0 ANGSTROMS RESOLUTION

• PDB DOI: https://doi.org/10.2210/pdb1CGT/pdb

• Classification: GLYCOSYLTRANSFERASE
• Organism(s): Niallia circulans
• Mutation(s): No 


• Deposited: 1992-06-10 Released: 1994-01-31 
• Deposition Author(s): Klein, C., Schulz, G.E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.166 
• R-Value Observed: 0.166 

Literature

Structure of cyclodextrin glycosyltransferase refined at 2.0 A resolution.

Klein, C., Schulz, G.E.

(1991) J Mol Biol 217: 737-750

• PubMed: 1826034 
• DOI: https://doi.org/10.1016/0022-2836(91)90530-j
• Primary Citation of Related Structures:  
  1CGT


• PubMed Abstract: 
  

  The previously reported structural model of cyclodextrin glycosyltransferase (EC 2.4.1.19) from Bacillus circulans has been improved. For this purpose the known sequence was built into an electron density map established by multiple isomorphous replacement and subsequent solvent-flattening at 2.5 A resolution. The resulting model was refined at 2.0 A resolution using a simulated annealing refinement method. Based on 70,171 independent reflections in the range 7.0 to 2.0 A resolution, a final R-factor of 17.6% was obtained with a model obeying standard geometry within 0.013 A in bond lengths and 2.7 degrees in bond angles. The final model consists of all 684 amino acid residues, two calcium ions and 588 solvent molecules.

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Organizational Affiliation: 

Institut für Organische Chemie und Biochemie der Universität, Freiburg, Germany.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 74.65 kDa 
• Atom Count: 5,857 
• Modelled Residue Count: 684 
• Deposited Residue Count: 684 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CYCLODEXTRIN GLYCOSYL-TRANSFERASE	A	684	Niallia circulans	Mutation(s): 0  EC: 2.4.1.19
UniProt
Find proteins for P30920 (Niallia circulans) Explore P30920  Go to UniProtKB:  P30920

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA	B [auth A], C [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.166 
• R-Value Observed: 0.166 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 94.8	α = 90
b = 104.7	β = 90
c = 114	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1994-01-31 
Deposition Author(s): Klein, C., Schulz, G.E.

Revision History  

• Version 1.0: 1994-01-31
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance