6XYI
NMR solution structure of alpha-AnmTX- Ms11a-3 (Ms11a-3)
Summary for 6XYI
| Entry DOI | 10.2210/pdb6xyi/pdb |
| NMR Information | BMRB: 34486 |
| Descriptor | AMS9.3.1 (1 entity in total) |
| Functional Keywords | protein, toxin |
| Biological source | Metridium senile |
| Total number of polymer chains | 1 |
| Total formula weight | 4936.89 |
| Authors | Mineev, K.S.,Kornilov, F.D.,Lushpa, V.A.,Logashina, Y.A.,Maleeva, E.E.,Andreev, Y.A. (deposition date: 2020-01-30, release date: 2021-02-10, Last modification date: 2025-02-19) |
| Primary citation | 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. Peptides from the Sea Anemone Metridium senile with Modified Inhibitor Cystine Knot (ICK) Fold Inhibit Nicotinic Acetylcholine Receptors. Toxins, 15:-, 2022 Cited by 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 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 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. PubMed: 36668848DOI: 10.3390/toxins15010028 PDB entries with the same primary citation |
| Experimental method | SOLUTION NMR |
Structure validation
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