C-terminal-binding protein 2 (CTBP2)

C-terminal-binding protein 2 (CTBP2) is a multifunctional transcriptional corepressor and scaffold protein, part of the CtBP family, that regulates gene expression by assembling and stabilizing repressive chromatin complexes with histone deacetylases, methylases, and other transcriptional regulators[1][2][3][5]. CTBP2 binds to NADH and senses the cellular metabolic state, allowing it to couple metabolic changes to gene regulation. The protein functions mainly as a transcriptional repressor but can also activate transcription in certain contexts[4]. Its physiological roles span development, cell proliferation, differentiation, and survival. Alternative splicing produces a longer isoform found as the synaptic ribbon protein "ribeye" in sensory neurons[3]. CTBP2 is highly implicated in oncogenesis—promoting metastasis, cell migration, and gene repression relevant to cancer. Genetic knockout or disruption leads to severe developmental defects and early lethality in animal models, demonstrating its essential functions. Although no approved drugs directly target CTBP2, it is a promising therapeutic target, and experimental agents aim to interfere with its oligomerization and chromatin-modulating activities[1][2].

Other names

CtBP2RibeyeC-terminal binding protein 2C-terminal-binding protein 2Ribeye protein

Inhibition of tetrameric assembly disrupts transcriptional activities and oncogenic functions. Blocking NADH binding or protein-protein interactions may reduce oncogenic transcription complex formation and repression of tumor suppressor genes. Indirect modulation via epigenetic compounds that alter chromatin structure may influence CTBP2 activity.