パーキンタンパク質のRING2およびREPドメインにおける病原性ミスセンス変異の包括的計算解析
Mutations in the PARK2 gene, encoding the parkin protein, are closely linked to autosomal recessive juvenile Parkinson's disease (ARJP). Parkin is a multi-domain protein whose C-terminal region harbors four zinc-coordinating domains, including RING2, where mutations are known to abolish E3 ubiquitin ligase activity critical for neuroprotection. Using an ensemble of in silico tools—SIFT, Mutation Assessor, PolyPhen2, SNPs&GO, and I-Mutant—this study systematically evaluated the pathogenicity of missense mutations across the RING2 and REP domains. Structural parameters including solvent-accessible surface area, hydrophobicity, intramolecular hydrogen bonding, and interaction energy profiles were compared between mutant and wild-type proteins via Discovery Studio 2.5. The analysis indicated that, with the exception of P437L and A379V, the remaining mutations examined were likely deleterious to RING2 domain architecture, providing a computational framework for identifying disease-relevant variants.
Missense mutations in the RING2 domain of parkin were computationally shown to disrupt structural integrity—altering hydrophobicity, hydrogen bonding, and interaction energies—thereby abolishing E3 ubiquitin ligase activity essential for neuronal protection.
This is basic research at the cellular or molecular level. For human application, inhalation is the most promising delivery route, but inhalation carries explosion risk and concentration matters (empirical LFL of 10%; high-concentration devices are not recommended).
See also:
https://h2-papers.org/en/papers/28189762