Biological Assembly 1  

 3D View: Structure

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

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

Macromolecule Content

• Total Structure Weight: 4.14 kDa 
• Atom Count: 278 
• Modelled Residue Count: 30 
• Deposited Residue Count: 30 
• Unique protein chains: 1

4B1Q

NMR structure of the glycosylated conotoxin CcTx from Conus consors

• DOI: 10.2210/pdb4B1Q/pdb
• BMRB: 18897

• Classification: TOXIN
• Organism(s): Conus consors
• Mutation(s): No 


• Deposited: 2012-07-12 Released: 2013-02-06 
• Deposition Author(s): Hocking, H.G., Gerwig, G.J., Favreau, P., Stocklin, R., Kamerling, J.P., Boelens, R.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: LEAST RESTRAINT VIOLATION 

Literature

Structure of the O-Glycosylated Conopeptide Cctx from Conus Consors Venom.

Hocking, H.G., Gerwig, G.J., Dutertre, S., Violette, A., Favreau, P., Stocklin, R., Kamerling, J.P., Boelens, R.

(2013) Chemistry 19: 870

• PubMed: 23281027 
• DOI: 10.1002/chem.201202713
• Primary Citation of Related Structures:  
  4B1Q


• PubMed Abstract: 
  

The glycopeptide CcTx, isolated from the venom of the piscivorous cone snail Conus consors, belongs to the κA-family of conopeptides. These toxins elicit excitotoxic responses in the prey by acting on voltage-gated sodium channels. The structure of CcTx, a first in the κA-family, has been determined by high-resolution NMR spectroscopy together with the analysis of its O-glycan at Ser7. A new type of glycopeptide O-glycan core structure, here registered as core type 9, containing two terminal L-galactose units {α-L-Galp-(1→4)-α-D-GlcpNAc-(1→6)-[α-L-Galp-(1→2)-β-D-Galp-(1→3)-]α-D-GalpNAc-(1→O)}, is highlighted. A sequence comparison to other putative members of the κA-family suggests that O-linked glycosylation might be more common than previously thought. This observation alone underlines the requirement for more careful and in-depth investigations into this type of post-translational modification in conotoxins.

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Organizational Affiliation: 

NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CONOTOXIN CCTX	A [auth P]	30	Conus consors	Mutation(s): 0
UniProt
Find proteins for P58928 (Conus consors) Explore P58928  Go to UniProtKB:  P58928

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
alpha-L-galactopyranose-(1-2)-beta-D-galactopyranose-(1-3)-[alpha-L-galactopyranose-(1-4)-2-acetamido-2-deoxy-alpha-D-glucopyranose-(1-6)]2-acetamido-2-deoxy-alpha-D-galactopyranose	B [auth A]	5		O-Glycosylation
Glycosylation Resources
GlyTouCan:  G96977QO GlyCosmos:  G96977QO

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
HYP	A [auth P]	L-PEPTIDE LINKING	C5 H9 N O3		PRO

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: LEAST RESTRAINT VIOLATION 
• OLDERADO: 4B1Q Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-07-12 
• Released Date: 2013-02-06 
Deposition Author(s): Hocking, H.G., Gerwig, G.J., Favreau, P., Stocklin, R., Kamerling, J.P., Boelens, R.

Revision History  

• Version 1.0: 2013-02-06
  Type: Initial release
  
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Other, Structure summary