Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 9.37 kDa 
• Atom Count: 651 
• Modelled Residue Count: 79 
• Deposited Residue Count: 79 
• Unique protein chains: 1

2FQ0

Solution structure of major conformation of holo-acyl carrier protein from malaria parasite plasmodium falciparum

• PDB DOI: 10.2210/pdb2FQ0/pdb
• BMRB: 6516

• Classification: LIPID TRANSPORT
• Organism(s): Plasmodium falciparum 3D7
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2006-01-17 Released: 2006-08-08 
• Deposition Author(s): Sharma, A.K., Sharma, S.K., Surolia, A., Surolia, N., Sarma, S.P.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 20 
• Conformers Submitted: 20 
• Selection Criteria: target function 

Literature

Solution structures of conformationally equilibrium forms of holo-acyl carrier protein (PfACP) from Plasmodium falciparum provides insight into the mechanism of activation of ACPs

Sharma, A.K., Sharma, S.K., Surolia, A., Surolia, N., Sarma, S.P.

(2006) Biochemistry 45: 6904-6916

• PubMed: 16734426 
• DOI: 10.1021/bi060368u
• Primary Citation of Related Structures:  
  2FQ0, 2FQ2


• PubMed Abstract: 
  

Acyl Carrier Protein (ACP) from the malaria parasite, Plasmodium falciparum (PfACP) in its holo form is found to exist in two conformational states in solution. Unique 3D solution structures of holo-PfACP have been determined for both equilibrium conformations, using high-resolution NMR methods. Twenty high-resolution solution structures for each of the two forms of holo-PfACP have been determined on the basis of 1226 and 1218 unambiguously assigned NOEs (including NOEs between 4'-phosphopantetheine prosthetic group (4'-PP) and protein), 55 backbone dihedral angles and 26 hydrogen bonds. The atomic rmsd values of the determined structures of two equilibrium forms, about the mean coordinates of the backbone and heavy atoms, are 0.48 +/- 0.09 and 0.92 +/- 0.10 and 0.49 +/- 0.08 and 0.97 +/- 0.11 A, respectively. The interaction of 4'-PP with the polypeptide backbone is reported here for the first time for any of the ACPs. The structures of holo-PfACP consist of three well-defined helices that are tightly packed. The structured regions of the molecule are stabilized by extensive hydrophobic interactions. The difference between the two forms arises from a reorientation of the 4'-PP group. The enthalpy difference between the two forms, although small, implies that a conformational switch is essential for the activation of holo-ACP. Sequence and structures of holo-PfACP have been compared with those of the ACPs from type I and type II fatty acid biosynthesis pathways (FAS), in particular with the ACP from rat and the butyryl-ACP from E. coli. The PfACP structure, thus determined has several novel features hitherto not seen in other ACPs.

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Organizational Affiliation: 

Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560012, India.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
acyl carrier protein	A	79	Plasmodium falciparum 3D7	Mutation(s): 0  Gene Names: malaria parasite P. falciparum
UniProt
Find proteins for O77077 (Plasmodium falciparum) Explore O77077  Go to UniProtKB:  O77077

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PNS	B [auth A]	4'-PHOSPHOPANTETHEINE C11 H23 N2 O7 P S JDMUPRLRUUMCTL-VIFPVBQESA-N

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 20 
• Conformers Submitted: 20 
• Selection Criteria: target function 
• OLDERADO: 2FQ0 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-01-17 
• Released Date: 2006-08-08 
Deposition Author(s): Sharma, A.K., Sharma, S.K., Surolia, A., Surolia, N., Sarma, S.P.

Revision History  

• Version 1.0: 2006-08-08
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Source and taxonomy, Version format compliance