Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Protein Workshop | Ligand Explorer

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

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

Macromolecule Content

• Total Structure Weight: 33307.93 
• Atom Count: 2325 
• Residue Count: 307 
• Unique protein chains: 1

3IM8

Crystal structure of MCAT from Streptococcus pneumoniae

• DOI: 10.2210/pdb3IM8/pdb

• Classification: TRANSFERASE
• Organism(s): Streptococcus pneumoniae (strain ATCC BAA-255 / R6)
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2009-08-10 Released: 2010-06-16 
• Deposition Author(s): Hong, S.K., Kim, K.H., Park, J.K., Kim, Y.M., Kim, E.E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.1 Å
• R-Value Free: 0.270 
• R-Value Work: 0.212 

Literature

New design platform for malonyl-CoA-acyl carrier protein transacylase

Hong, S.K., Kim, K.H., Park, J.K., Jeong, K.-W., Kim, Y.M., Kim, E.E.

(2010) Febs Lett. 584: 1240-1244

• PubMed: 20176020 
• DOI: 10.1016/j.febslet.2010.02.038
• Primary Citation of Related Structures:  
  3IM9


• PubMed Abstract: 
  

Malonyl-CoA-acyl carrier protein transacylase (MCAT) transfers the malonyl group from malonyl-CoA to holo-acyl carrier protein (ACP), and since malonyl-ACP is a key building block for fatty-acid biosynthesis it is considered as a promising antibacterial target. The crystal structures of MCAT from Staphylococcus aureus and Streptococcus pneumoniae have been determined at 1.46 and 2.1A resolution, respectively. In the SaMCAT structure, the N-terminal expression peptide of a neighboring molecule running in the opposite direction of malonyl-CoA makes extensive interactions with the highly conserved "Gly-Gln-Gly-Ser-Gln" stretch, suggesting a new design platform. Mutagenesis results suggest that Ser91 and His199 are the catalytic dyad.

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Organizational Affiliation: 

Korea Institute of Science and Technology, Life Sciences Division, Seoul, Republic of Korea.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Malonyl acyl carrier protein transacylase	A	307	Streptococcus pneumoniae (strain ATCC BAA-255 / R6)	Mutation(s): 0  Gene Names: fabD EC: 2.3.1.39
Find proteins for Q8DR16 (Streptococcus pneumoniae (strain ATCC BAA-255 / R6)) Go to UniProtKB:  Q8DR16

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ACT	A	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.1 Å
• R-Value Free: 0.270 
• R-Value Work: 0.212 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 48.263	α = 90.00
b = 63.508	β = 90.00
c = 89.892	γ = 90.00

Software Package:

Software Name	Purpose
d*TREK	data reduction
CrystalClear	data collection
CNS	phasing
PDB_EXTRACT	data extraction
d*TREK	data scaling
CNS	refinement
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-08-10 
• Released Date: 2010-06-16 
• Deposition Author(s): Hong, S.K., Kim, K.H., Park, J.K., Kim, Y.M., Kim, E.E.

Revision History 

• Version 1.0: 2010-06-16
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance