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RNF7
RNF7 Full Name
ring finger protein 7
RNF7 Introduction
RNF7 (Ring Finger Protein 7), also known as RBX2, SAG (Sensitive to Apoptosis Gene), or ROC2, is a highly conserved RING-type E3 ubiquitin ligase and an essential catalytic component of Cullin-RING ligase (CRL) complexes, particularly CRL5. Researchers investigating protein degradation, cellular stress responses, and targeted protein turnover frequently focus on RNF7 because of its pivotal role in maintaining protein homeostasis. RNF7 functions as the catalytic RING subunit within CRL complexes, working together with Cullin proteins and substrate recognition modules to regulate the degradation of numerous proteins involved in cell cycle progression, apoptosis, DNA damage responses, and oxidative stress. Through its ability to control the stability of key signaling molecules, RNF7 serves as an important regulator of cellular fate and tissue homeostasis. Owing to these properties, RNF7 has attracted growing attention as a potential target in ubiquitin biology and targeted protein degradation research.
Beyond its established role in ubiquitination, RNF7 has emerged as a multifunctional regulator involved in mitochondrial quality control, metabolic homeostasis, and cellular adaptation to stress. Recent findings have demonstrated that RNF7 participates in mitochondrial ubiquitination and mitophagy, helping maintain mitochondrial integrity and energy production. Loss of RNF7 activity impairs mitochondrial protein turnover, disrupts respiratory function, and compromises cellular metabolism, ultimately contributing to tissue dysfunction. In cardiac tissues, RNF7-mediated pathways have been shown to be essential for maintaining normal mitochondrial homeostasis and preventing the accumulation of damaged organelles. These discoveries have broadened the biological significance of RNF7, highlighting its role not only in proteasomal degradation but also in the preservation of organelle function and cellular metabolism. Such functions make RNF7 increasingly relevant to research fields involving aging, metabolic disorders, cardiovascular diseases, and mitochondrial dysfunction.
Aberrant expression and dysregulation of RNF7 have been implicated in a variety of human cancers, making it an emerging biomarker and potential therapeutic target. Elevated RNF7 expression has been observed in multiple tumor types and is frequently associated with poor prognosis, enhanced tumor progression, and altered immune microenvironments. Functional studies suggest that RNF7 promotes cancer cell survival by suppressing apoptosis, stimulating glycolytic metabolism, and activating oncogenic signaling pathways such as JAK/STAT3. In renal cell carcinoma and several other malignancies, RNF7 overexpression contributes to tumor growth and may reduce sensitivity to targeted therapies, thereby facilitating therapeutic resistance. Increasing evidence indicates that RNF7 acts as a critical molecular bridge linking ubiquitination, metabolic reprogramming, and cancer progression. Consequently, RNF7 is being actively explored as a promising target for precision oncology and for the development of novel therapeutics aimed at modulating ubiquitin-dependent signaling networks.
Alternate Names for RNF7
RNF7; ring finger protein 7; SAG; ROC2; CKBBP1; RING-box protein 2; rbx2; regulator of cullins 2; CKII beta-binding protein 1; zinc RING finger protein SAG; sensitive to apoptosis gene protein; sensitive to apoptosis, zinc RING finger protein SAG, regulator of cullins 2;
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