3U9F

Structure of CATI in complex with chloramphenicol


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.236 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The structural basis for substrate versatility of chloramphenicol acetyltransferase CAT(I).

Biswas, T.Houghton, J.L.Garneau-Tsodikova, S.Tsodikov, O.V.

(2012) Protein Sci. 21: 520-530

  • DOI: 10.1002/pro.2036
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Novel antibiotics are needed to overcome the challenge of continually evolving bacterial resistance. This has led to a renewed interest in mechanistic studies of once popular antibiotics like chloramphenicol (CAM). Chloramphenicol acetyltransferases ...

    Novel antibiotics are needed to overcome the challenge of continually evolving bacterial resistance. This has led to a renewed interest in mechanistic studies of once popular antibiotics like chloramphenicol (CAM). Chloramphenicol acetyltransferases (CATs) are enzymes that covalently modify CAM, rendering it inactive against its target, the ribosome, and thereby causing resistance to CAM. Of the three major types of CAT (CAT(I-III)), the CAM-specific CAT(III) has been studied extensively. Much less is known about another clinically important type, CAT(I). In addition to inactivating CAM and unlike CAT(III), CAT(I) confers resistance to a structurally distinct antibiotic, fusidic acid. The origin of the broader substrate specificity of CAT(I) has not been fully elucidated. To understand the substrate binding features of CAT(I), its crystal structures in the unbound (apo) and CAM-bound forms were determined. The analysis of these and previously determined CAT(I)-FA and CAT(III)-CAM structures revealed interactions responsible for CAT(I) binding to its substrates and clarified the broader substrate preference of CAT(I) compared to that of CAT(III).


    Organizational Affiliation

    Department of Medicinal Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Chloramphenicol acetyltransferase
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, R, S
219Escherichia coliMutation(s): 0 
Gene Names: cat
EC: 2.3.1.28
Find proteins for P62577 (Escherichia coli)
Go to UniProtKB:  P62577
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CLM
Query on CLM

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, R, S
CHLORAMPHENICOL
C11 H12 Cl2 N2 O5
WIIZWVCIJKGZOK-RKDXNWHRSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.236 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 107.336α = 119.97
b = 114.429β = 97.83
c = 114.374γ = 98.64
Software Package:
Software NamePurpose
MOLREPphasing
HKL-2000data reduction
REFMACrefinement
HKL-2000data collection
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-02-15
    Type: Initial release
  • Version 1.1: 2012-02-29
    Type: Structure summary
  • Version 1.2: 2012-04-04
    Type: Database references