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: 10.38 kDa 
• Atom Count: 727 
• Modelled Residue Count: 87 
• Deposited Residue Count: 87 
• Unique protein chains: 1

2LML

Solution NMR structure of holo acyl carrier protein from geobacter Metallireducens refined with nh rdcs, Northeast Structural Genomics consortium target gmr141

• PDB DOI: 10.2210/pdb2LML/pdb
• Entry: 2LML supersedes: 2KWM
• BMRB: 16860

• Classification: TRANSPORT PROTEIN
• Organism(s): Geobacter metallireducens GS-15
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2011-12-05 Released: 2012-01-25 
• Deposition Author(s): Ramelot, T.A., Smola, M.J., Lee, H., Zhao, L., Ciccosanti, C., Foote, E.L., Hamilton, K., Nair, R., Rost, B., Swapna, G., Acton, T.B., Xiao, R., Everett, J.K., Prestegard, J.H., Montelione, G.T., Kennedy, M.A., Northeast Structural Genomics Consortium (NESG)

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Solution structure of 4'-phosphopantetheine - GmACP3 from Geobacter metallireducens: a specialized acyl carrier protein with atypical structural features and a putative role in lipopolysaccharide biosynthesis.

Ramelot, T.A., Smola, M.J., Lee, H.W., Ciccosanti, C., Hamilton, K., Acton, T.B., Xiao, R., Everett, J.K., Prestegard, J.H., Montelione, G.T., Kennedy, M.A.

(2011) Biochemistry 50: 1442-1453

• PubMed: 21235239 
• DOI: 10.1021/bi101932s
• Primary Citation of Related Structures:  
  2LML


• PubMed Abstract: 
  

GmACP3 from Geobacter metallireducens is a specialized acyl carrier protein (ACP) whose gene, gmet_2339, is located near genes encoding many proteins involved in lipopolysaccharide (LPS) biosynthesis, indicating a likely function for GmACP3 in LPS production. By overexpression in Escherichia coli, about 50% holo-GmACP3 and 50% apo-GmACP3 were obtained. Apo-GmACP3 exhibited slow precipitation and non-monomeric behavior by (15)N NMR relaxation measurements. Addition of 4'-phosphopantetheine (4'-PP) via enzymatic conversion by E. coli holo-ACP synthase resulted in stable >95% holo-GmACP3 that was characterized as monomeric by (15)N relaxation measurements and had no indication of conformational exchange. We have determined a high-resolution solution structure of holo-GmACP3 by standard NMR methods, including refinement with two sets of NH residual dipolar couplings, allowing for a detailed structural analysis of the interactions between 4'-PP and GmACP3. Whereas the overall four helix bundle topology is similar to previously solved ACP structures, this structure has unique characteristics, including an ordered 4'-PP conformation that places the thiol at the entrance to a central hydrophobic cavity near a conserved hydrogen-bonded Trp-His pair. These residues are part of a conserved WDSLxH/N motif found in GmACP3 and its orthologs. The helix locations and the large hydrophobic cavity are more similar to medium- and long-chain acyl-ACPs than to other apo- and holo-ACP structures. Taken together, structural characterization along with bioinformatic analysis of nearby genes suggests that GmACP3 is involved in lipid A acylation, possibly by atypical long-chain hydroxy fatty acids, and potentially is involved in synthesis of secondary metabolites.

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Organizational Affiliation: 

Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio 45056, United States.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Putative acyl carrier protein	A	87	Geobacter metallireducens GS-15	Mutation(s): 0  Gene Names: Gmet_2339, acpP-4
UniProt
Find proteins for Q39T60 (Geobacter metallireducens (strain ATCC 53774 / DSM 7210 / GS-15)) Explore Q39T60  Go to UniProtKB:  Q39T60

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: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2LML Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-12-05 
• Released Date: 2012-01-25 
Deposition Author(s): Ramelot, T.A., Smola, M.J., Lee, H., Zhao, L., Ciccosanti, C., Foote, E.L., Hamilton, K., Nair, R., Rost, B., Swapna, G., Acton, T.B., Xiao, R., Everett, J.K., Prestegard, J.H., Montelione, G.T., Kennedy, M.A., Northeast Structural Genomics Consortium (NESG)
• This entry supersedes: 2KWM

Revision History  

• Version 1.0: 2012-01-25
  Type: Initial release
  
• Version 1.1: 2012-02-22
  Changes: Structure summary