Biological Assembly 1  

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

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 5.22 kDa 
• Atom Count: 369 
• Modelled Residue Count: 43 
• Deposited Residue Count: 43 
• Unique protein chains: 1

2M60

Enterocin 7B

• PDB DOI: 10.2210/pdb2M60/pdb
• BMRB: 19101

• Classification: ANTIMICROBIAL PROTEIN
• Organism(s): Enterococcus faecalis
• Mutation(s): No 


• Deposited: 2013-03-18 Released: 2013-06-12 
• Deposition Author(s): Lohans, C.T., Towle, K.M., Miskolzie, M., McKay, R.T., van Belkum, M.J., McMullen, L.M., Vederas, J.C.

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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 Structures of the Linear Leaderless Bacteriocins Enterocin 7A and 7B Resemble Carnocyclin A, a Circular Antimicrobial Peptide

Lohans, C.T., Towle, K.M., Miskolzie, M., McKay, R.T., van Belkum, M.J., McMullen, L.M., Vederas, J.C.

(2013) Biochemistry 52: 3987-3994

• PubMed: 23725536 
• DOI: 10.1021/bi400359z
• Primary Citation of Related Structures:  
  2M5Z, 2M60


• PubMed Abstract: 
  

Leaderless bacteriocins are a class of ribosomally synthesized antimicrobial peptides that are produced by certain Gram-positive bacteria without an N-terminal leader section. These bacteriocins are of great interest due to their potent inhibition of many Gram-positive organisms, including food-borne pathogens such as Listeria and Clostridium spp. We now report the NMR solution structures of enterocins 7A and 7B, leaderless bacteriocins recently isolated from Enterococcus faecalis 710C. These are the first three-dimensional structures to be reported for bacteriocins of this class. Unlike most other linear Gram-positive bacteriocins, enterocins 7A and 7B are highly structured in aqueous conditions. Both peptides are primarily α-helical, adopting a similar overall fold. The structures can be divided into three separate α-helical regions: the N- and C-termini are both α-helical, separated by a central kinked α-helix. The overall structures bear an unexpected resemblance to carnocyclin A, a 60-residue peptide that is cyclized via an amide bond between the C- and N-termini and has a saposin fold. Because of synergism observed for other two-peptide leaderless bacteriocins, it was of interest to probe possible binding interactions between enterocins 7A and 7B. However, despite synergistic activity observed between these peptides, no significant binding interaction was observed based on NMR and isothermal calorimetry.

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Organizational Affiliation: 

Department of Chemistry, and §Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada T6G 2G2.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Enterocin JSB	A	43	Enterococcus faecalis	Mutation(s): 0  Gene Names: mr10B, entNB
UniProt
Find proteins for Q1A2D2 (Enterococcus faecalis) Explore Q1A2D2  Go to UniProtKB:  Q1A2D2

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
FME	A	L-PEPTIDE LINKING	C6 H11 N O3 S		MET

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2M60 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-03-18 
• Released Date: 2013-06-12 
Deposition Author(s): Lohans, C.T., Towle, K.M., Miskolzie, M., McKay, R.T., van Belkum, M.J., McMullen, L.M., Vederas, J.C.

Revision History  

• Version 1.0: 2013-06-12
  Type: Initial release
  
• Version 1.1: 2013-06-19
  Changes: Database references