中国神经再生研究(英文版) ›› 2026, Vol. 21 ›› Issue (10): 4906-4907.doi: 10.4103/NRR.NRR-D-25-01311

• 观点:退行性病与再生 • 上一篇    下一篇

天冬氨酸D -异构化在与阿尔茨海默病发病机制有关的蛋白质中的潜在作用#br#
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  • 出版日期:2026-10-15 发布日期:2026-06-13

Potential roles of aspartic acid D-isomerization in proteins implicated in the pathogenesis of Alzheimer's disease

Genta Ito*, Naoko Utsunomiya-Tate   

  1. Department of Biomolecular Chemistry, Faculty of Pharmaceutical Sciences, Teikyo University, Tokyo, Japan
  • Online:2026-10-15 Published:2026-06-13
  • Contact: Genta Ito, PhD, ito.genta.aw@teikyo-u.ac.jp.
  • Supported by:
    This work is dedicated to the memory of Professor Naoko Utsunomiya-Tate, who passed away during the preparation of this manuscript.

摘要: https://orcid.org/0000-0001-6370-1099 (Genta Ito)

关键词:

Abstract: Non-enzymatic isomerization of aspartic acid residues in proteins associated with Alzheimer’s disease: Proteins are composed of L-amino acids following ribosomal translation. However, if they remain unmetabolized for an extended period, some residues (particularly aspartic acid [Asp]) undergo isomerization to the D-form. This process begins with nucleophilic attack (by the nitrogen atom of the amide group of an adjacent residue) on the side-chain carboxy group of an Asp residue. This forms a fivemembered L-succinimide intermediate, which has two carbonyl carbons and can transform back to an L-Asp residue or isomerize into an L-isoAsp residue. The chiral center of the L-succinimide intermediate can easily invert to form a D-succinimide intermediate via keto-enol tautomerization. This D-succinimide intermediate then cleaves to yield a D-aspartic acid (D-Asp) or D-isoaspartate (D-isoAsp) residue.