Chromobox protein homolog 1 (CBX1)

Chromobox protein homolog 1 (CBX1), also known as HP1β, is a highly conserved non-histone chromosomal protein and a key regulator of heterochromatin structure and function[1][2][3][5]. CBX1 is enriched in heterochromatin and is essential for gene repression through chromatin compaction, primarily by binding to histone H3 trimethylated at lysine 9 (H3K9me3) via its N-terminal chromodomain[1][2][3][5]. It also features a C-terminal chromoshadow domain that enables homodimerization and interactions with other chromatin-associated proteins[1][2][3]. CBX1 mediates various critical processes in the cell, including the maintenance of genome integrity, telomere homeostasis, and the cellular response to DNA damage. It is a central factor in the epigenetic silencing of genes and is implicated in diseases such as cancer due to its role in transcriptional repression and chromatin dynamics[5][3]. If you need more detail or specific references regarding interactions, disease links, or mechanistic data, please specify. No well-established drugs directly targeting CBX1 are currently known.

Other names

HP1βHP1 betaHP1Hs-betaHP1HsbetaM31MOD1p25betaHeterochromatin protein 1 homolog betaHeterochromatin protein p25Modifier 1 proteinchromobox protein homolog 1CBX

Drugs or molecules (if developed in future) would be expected to act via modulation of chromatin compaction or inhibition of chromodomain interactions with methylated histones; current drugs are not well-established[5]