6XYI | pdb_00006xyi

NMR solution structure of alpha-AnmTX- Ms11a-3 (Ms11a-3)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: target function 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Peptides from the Sea Anemone Metridium senile with Modified Inhibitor Cystine Knot (ICK) Fold Inhibit Nicotinic Acetylcholine Receptors.

Kasheverov, I.E.Logashina, Y.A.Kornilov, F.D.Lushpa, V.A.Maleeva, E.E.Korolkova, Y.V.Yu, J.Zhu, X.Zhangsun, D.Luo, S.Stensvag, K.Kudryavtsev, D.S.Mineev, K.S.Andreev, Y.A.

(2022) Toxins (Basel) 15

  • DOI: https://doi.org/10.3390/toxins15010028
  • Primary Citation of Related Structures:  
    6XYH, 6XYI

  • PubMed Abstract: 

    Nicotinic acetylcholine receptors (nAChRs) play an important role in the functioning of the central and peripheral nervous systems, and other organs of living creatures. There are several subtypes of nAChRs, and almost all of them are considered as pharmacological targets in different pathological states. The crude venom of the sea anemone Metridium senile showed the ability to interact with nAChRs. Four novel peptides (Ms11a-1-Ms11a-4) with nAChR binding activity were isolated. These peptides stabilized by three disulfide bridges have no noticeable homology with any known peptides. Ms11a-1-Ms11a-4 showed different binding activity towards the muscle-type nAChR from the Torpedo californica ray. The study of functional activity and selectivity for the most potent peptide (Ms11a-3) revealed the highest antagonism towards the heterologous rat α9α10 nAChR compared to the muscle and α7 receptors. Structural NMR analysis of two toxins (Ms11a-2 and Ms11a-3) showed that they belong to a new variant of the inhibitor cystine knot (ICK) fold but have a prolonged loop between the fifth and sixth cysteine residues. Peptides Ms11a-1-Ms11a-4 could represent new pharmacological tools since they have structures different from other known nAChRs inhibitors.


  • Organizational Affiliation

    Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, str. Miklukho-Maklaya 16/10, 117997 Moscow, Russia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
AMS9.3.142Metridium senileMutation(s): 0 
UniProt
Find proteins for P0DRC2 (Metridium senile)
Explore P0DRC2 
Go to UniProtKB:  P0DRC2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DRC2
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: target function 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Russian Science FoundationRussian Federation19-74-30014
Russian Foundation for Basic ResearchRussian Federation20-04-00761

Revision History  (Full details and data files)

  • Version 1.0: 2021-02-10
    Type: Initial release
  • Version 1.1: 2023-06-14
    Changes: Database references, Other
  • Version 1.2: 2024-10-16
    Changes: Data collection, Database references, Structure summary
  • Version 1.3: 2025-02-19
    Changes: Database references