2MW7

Solution NMR structure of a novel cysteine framework containing Conus peptide Mo3964

2MW7 の概要

• エントリーDOI: 10.2210/pdb2mw7/pdb
• NMR情報: BMRB: 25302
• 分子名称: Mo3964 (1 entity in total)
• 機能のキーワード: toxin, conotoxin, neuronal ion-channel modulator, animal toxins, marine cone snails, conus monile, m-superfamily, neuronal voltage-gated ion-channel modulator, disulfide bond connectivity, heteronuclear solution nmr spectroscopy, side-chain dihedral angles, hydrogen bonds, peptide conformation, peptide scaffolds
• 由来する生物種: Conus monile
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 3974.40

構造登録者

Sarma, S.P.,Kancherla, A. (登録日: 2014-10-29, 公開日: 2015-09-23, 最終更新日: 2024-10-16)

主引用文献

Kancherla, A.K.,Meesala, S.,Jorwal, P.,Palanisamy, R.,Sikdar, S.K.,Sarma, S.P.
A Disulfide Stabilized beta-Sandwich Defines the Structure of a New Cysteine Framework M-Superfamily Conotoxin
Acs Chem.Biol., 10:1847-1860, 2015

PubMed Abstract: The structure of a new cysteine framework (-C-CC-C-C-C-) "M"-superfamily conotoxin, Mo3964, shows it to have a β-sandwich structure that is stabilized by inter-sheet cross disulfide bonds. Mo3964 decreases outward K(+) currents in rat dorsal root ganglion neurons and increases the reversal potential of the NaV1.2 channels. The structure of Mo3964 (PDB ID: 2MW7 ) is constructed from the disulfide connectivity pattern, i.e., 1-3, 2-5, and 4-6, that is hitherto undescribed for the "M"-superfamily conotoxins. The tertiary structural fold has not been described for any of the known conus peptides. NOE (549), dihedral angle (84), and hydrogen bond (28) restraints, obtained by measurement of (h3)JNC' scalar couplings, were used as input for structure calculation. The ensemble of structures showed a backbone root mean square deviation of 0.68 ± 0.18 Å, with 87% and 13% of the backbone dihedral (ϕ, ψ) angles lying in the most favored and additional allowed regions of the Ramachandran map. The conotoxin Mo3964 represents a new bioactive peptide fold that is stabilized by disulfide bonds and adds to the existing repertoire of scaffolds that can be used to design stable bioactive peptide molecules.

PubMed: 25961405
DOI: 10.1021/acschembio.5b00226

実験手法

SOLUTION NMR