4ISX

The crystal structure of maltose o-acetyltransferase from clostridium difficile 630 in complex with acetyl-coa

• PDB DOI: https://doi.org/10.2210/pdb4ISX/pdb
• Entry: 4ISX supersedes: 4EBH

• Classification: TRANSFERASE
• Organism(s): Clostridioides difficile 630
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2013-01-17 Released: 2013-01-30 
• Deposition Author(s): Tan, K., Gu, G., Peterson, S., Anderson, W.F., Joachimiak, A., Center for Structural Genomics of Infectious Diseases (CSGID)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.252 
• R-Value Work: 0.195 
• R-Value Observed: 0.197 

Starting Model: experimental

Literature

The crystal structure of maltose o-acetyltransferase from clostridium difficile 630 in complex with acetyl-coa

Tan, K., Gu, G., Peterson, S., Anderson, W.F., Joachimiak, A.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C3  (Explore in 3D)
Global Stoichiometry: Homo 3-mer - A3 

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

Biological Assembly 2  

Global Symmetry: Cyclic - C3  (Explore in 3D)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 44.11 kDa 
• Atom Count: 3,055 
• Modelled Residue Count: 371 
• Deposited Residue Count: 376 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Maltose O-acetyltransferase	A, B	188	Clostridioides difficile 630	Mutation(s): 0  Gene Names: Clostridium difficile, maa EC: 2.3.1.79 (PDB Primary Data), 2.3.1 (UniProt)
UniProt
Find proteins for Q18A66 (Clostridioides difficile (strain 630)) Explore Q18A66  Go to UniProtKB:  Q18A66

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ACO	C [auth A], E [auth B]	ACETYL COENZYME *A C23 H38 N7 O17 P3 S ZSLZBFCDCINBPY-ZSJPKINUSA-N
MES	D [auth A]	2-(N-MORPHOLINO)-ETHANESULFONIC ACID C6 H13 N O4 S SXGZJKUKBWWHRA-UHFFFAOYSA-N

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: 2.70 Å
• R-Value Free: 0.252 
• R-Value Work: 0.195 
• R-Value Observed: 0.197 
• Space Group: F 2 3
• Diffraction Data: https://doi.org/10.18430/m34isx

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 167.896	α = 90
b = 167.896	β = 90
c = 167.896	γ = 90

Software Package:

Software Name	Purpose
SBC-Collect	data collection
MOLREP	phasing
PHENIX	refinement
HKL-3000	data reduction
HKL-3000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-01-30 
Deposition Author(s): Tan, K., Gu, G., Peterson, S., Anderson, W.F., Joachimiak, A., Center for Structural Genomics of Infectious Diseases (CSGID)
• This entry supersedes: 4EBH

Revision History  

• Version 1.0: 2013-01-30
  Type: Initial release
  
• Version 1.1: 2023-09-20
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.2: 2023-12-06
  Changes: Data collection
• Version 1.3: 2024-11-06
  Changes: Structure summary