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: 4.18 kDa 
• Atom Count: 286 
• Modelled Residue Count: 36 
• Deposited Residue Count: 37 
• Unique protein chains: 1

2MCR

Solution structure of ShK-like immunomodulatory peptide from Brugia malayi (filarial worm)

• PDB DOI: 10.2210/pdb2MCR/pdb
• BMRB: 19450

• Classification: IMMUNE SYSTEM
• Organism(s): Brugia malayi
• Mutation(s): Yes 


• Deposited: 2013-08-22 Released: 2014-07-02 
• Deposition Author(s): Chhabra, S., Swarbrick, J.D., Pennington, M.W., Chang, S.C., Norton, R.S.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 30 
• Selection Criteria: structures with the lowest energy 

Literature

Kv1.3 channel-blocking immunomodulatory peptides from parasitic worms: implications for autoimmune diseases.

Chhabra, S., Chang, S.C., Nguyen, H.M., Huq, R., Tanner, M.R., Londono, L.M., Estrada, R., Dhawan, V., Chauhan, S., Upadhyay, S.K., Gindin, M., Hotez, P.J., Valenzuela, J.G., Mohanty, B., Swarbrick, J.D., Wulff, H., Iadonato, S.P., Gutman, G.A., Beeton, C., Pennington, M.W., Norton, R.S., Chandy, K.G.

(2014) FASEB J 28: 3952-3964

• PubMed: 24891519 
• DOI: 10.1096/fj.14-251967
• Primary Citation of Related Structures:  
  2MCR, 2MD0


• PubMed Abstract: 
  

The voltage-gated potassium (Kv) 1.3 channel is widely regarded as a therapeutic target for immunomodulation in autoimmune diseases. ShK-186, a selective inhibitor of Kv1.3 channels, ameliorates autoimmune diseases in rodent models, and human phase 1 trials of this agent in healthy volunteers have been completed. In this study, we identified and characterized a large family of Stichodactyla helianthus toxin (ShK)-related peptides in parasitic worms. Based on phylogenetic analysis, 2 worm peptides were selected for study: AcK1, a 51-residue peptide expressed in the anterior secretory glands of the dog-infecting hookworm Ancylostoma caninum and the human-infecting hookworm Ancylostoma ceylanicum, and BmK1, the C-terminal domain of a metalloprotease from the filarial worm Brugia malayi. These peptides in solution adopt helical structures closely resembling that of ShK. At doses in the nanomolar-micromolar range, they block native Kv1.3 in human T cells and cloned Kv1.3 stably expressed in L929 mouse fibroblasts. They preferentially suppress the proliferation of rat CCR7(-) effector memory T cells without affecting naive and central memory subsets and inhibit the delayed-type hypersensitivity (DTH) response caused by skin-homing effector memory T cells in rats. Further, they suppress IFNγ production by human T lymphocytes. ShK-related peptides in parasitic worms may contribute to the potential beneficial effects of probiotic parasitic worm therapy in human autoimmune diseases.

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Organizational Affiliation: 

Department of Physiology and Biophysics, School of Medicine, University of California, Irvine, California, USA; [e-mail] [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Probable zinc metalloproteinase, putative	A	37	Brugia malayi	Mutation(s): 1  Gene Names: bma-nas-14, Bma-nas-14, Bm3230, BM_Bm3230 EC: 3.4.24
UniProt
Find proteins for A0A0J9XQE3 (Brugia malayi) Explore A0A0J9XQE3  Go to UniProtKB:  A0A0J9XQE3

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 30 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2MCR Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-08-22 
• Released Date: 2014-07-02 
Deposition Author(s): Chhabra, S., Swarbrick, J.D., Pennington, M.W., Chang, S.C., Norton, R.S.

Revision History  

• Version 1.0: 2014-07-02
  Type: Initial release
  
• Version 1.1: 2015-04-08
  Changes: Database references
• Version 1.2: 2016-04-27
  Changes: Structure summary