| 背景信息 |
Ribonuclease H2 subunit C (RNASEH2C) is the non-catalytic component of the heterotrimeric RNase H2 complex, which degrades RNA:DNA hybrids and removes misincorporated ribonucleotides to maintain genomic stability. Structurally, RNASEH2C is integral to the formation of the complex's triple beta-barrel core, ensuring the stability and enzymatic activity of the catalytic subunit. Biallelic loss-of-function mutations in RNASEH2C cause Aicardi-Goutières syndrome type 3 (AGS3), an autoinflammatory encephalopathy characterized by severe neurological dysfunction, intracranial calcifications, and leukodystrophy. These defects lead to the accumulation of endogenous nucleic acids, triggering aberrant type I interferon-mediated immune responses. |