Zinc finger and BTB domain-containing protein 5 (ZBTB5)

Zinc finger and BTB domain-containing protein 5 (ZBTB5) is a nuclear transcription factor belonging to the BTB/POZ domain protein family, characterized by a POZ/BTB domain at the N-terminus and two C-terminal zinc finger motifs[3][6]. ZBTB5 represses transcription of key genes in the cell cycle, such as p21 and HDM2, by binding to promoter elements and recruiting histone deacetylase complexes via its POZ domain, leading to chromatin remodeling. It is expressed in most tissues, showing elevated levels in certain cancers and is predominantly localized to nuclear speckles[3][6]. ZBTB5 directly modulates cell cycle progression and cell proliferation, and functions as a potential proto-oncogene, partly due to its role in repressing the p53 pathway. Dysfunction or deregulation of ZBTB5 may contribute to tumorigenesis and the development of malignancies by dysregulating cell cycle checkpoints.

Other names

ZBTB5KIAA0354zinc finger and BTB domain-containing protein 5Zinc finger and BTB domain containing 5ZBTB5_HUMAN (UniProt)

No clinically validated mechanism of action for drugs against ZBTB5. Experimental mechanisms referenced include inhibition of transcriptional repression or interruption of its interaction with co-repressor complexes[3][6], but no clinical drugs pursue this.