Ribonuclease A family (RNase A family)

The Ribonuclease A (RNase A) family is a group of vertebrate-specific secretory enzymes primarily known for their ability to catalyze the cleavage of RNA [1.1.1, 1.3.1]. In humans, the family consists of 13 members, with eight canonical members (RNase 1–8) possessing distinct ribonucleolytic activities and tissue distributions [1.3.1, 1.3.3]. Beyond their classical role in RNA metabolism and dietary digestion, these proteins are integral to innate immunity, exhibiting potent antiviral, antibacterial, and antifungal properties [1.3.1, 1.3.4]. Some members, such as Angiogenin (RNase 5), play critical roles in angiogenesis and neuroprotection, while others like RNase 1 are involved in vascular homeostasis by clearing extracellular RNA [1.3.1, 1.3.3]. In the context of disease, the family is implicated in cancer progression, chronic inflammation, and neurodegeneration [1.3.1, 1.4.1]. Therapeutically, RNases are being developed as cytotoxic agents for cancer (e.g., Ranpirnase and engineered RNase 1 variants) that induce apoptosis by evading the endogenous ribonuclease inhibitor and degrading cellular RNA [1.2.1, 1.4.1]. Conversely, inhibitors of specific family members like Angiogenin are being explored to suppress tumor-associated blood vessel growth [1.4.3].

Other names

Pancreatic ribonuclease familyRNase A superfamilySecretory ribonuclease familyhRNase A superfamily

RNA degradation, inhibition of protein synthesis, induction of apoptosis, receptor-mediated signaling, and evasion of the endogenous ribonuclease inhibitor.