Growth arrest and DNA-damage-inducible proteins-interacting protein 1 (GADD45GIP1)

Growth arrest and DNA-damage-inducible proteins-interacting protein 1 (GADD45GIP1, also known as CRIF1 and other aliases) is a component of the large mitochondrial ribosomal subunit (mL64/39S ribosomal protein L59, mitochondrial) essential for the translation of oxidative phosphorylation (OXPHOS) proteins in mammalian mitochondria. GADD45GIP1 is a nuclear-localized protein that regulates the cell cycle by inhibiting G1 to S phase progression, acting as a negative regulator of cyclin-dependent kinases and as a repressor for certain transcriptional activities (e.g., NR4A1). It interacts directly with GADD45 family proteins and is inducible by p53, contributing to cell cycle arrest and cellular stress responses. Disruption of GADD45GIP1 function results in defects in mitochondrial protein synthesis, failure of oxidative phosphorylation, and has been observed to cause neurodegeneration in model organisms. GADD45GIP1 has disease relevance in cancer (including ovarian cancer, adrenal adenoma) and may participate in broader networks regulating cell proliferation and survival.

Other names

CRIF1Large ribosomal subunit protein mL64MRPL59PLINP1PRG6MRP-L59CKBBP2CKbetaBP239S ribosomal protein L59, mitochondrialCKII beta-associating proteinCR6-interacting factor 1Papillomavirus L2-interacting nuclear protein 1p53-responsive gene 6 proteinGrowth arrest and DNA damage-inducible proteins-interacting protein 1Plinp1MGC4667MGC4758

For drugs targeting associated cell cycle or mitochondrial translation pathways (not specific to GADD45GIP1 but mechanistically relevant): - Inhibition of cyclin-dependent kinases (CDKs) - Modulation of mitochondrial translation or oxidative phosphorylation