Chromosome X open reading frame 51B (CXorf51B)

Chromosome X open reading frame 51B (CXorf51B) is a human protein encoded by a gene located at Xq27.3. This gene belongs to a category of uncharacterized open reading frame (ORF) proteins—often referred to as "Tdark" proteins—that lack significant functional and disease annotation[1][4]. Structural studies of the closely related CXorf51A protein have demonstrated that it is an intrinsically disordered protein (IDP), characterized by a high content of basic amino acids (lysine, arginine) and serine/threonine, with a strong propensity for structural disorder and minimal secondary structure[2]. These sequence properties suggest potential roles in nucleic acid binding or regulatory processes, but no experimental validation of these functions or specific disease associations has been reported[2][6]. The Human Protein Atlas indicates some tissue-specific mRNA expression but provides no functional annotation[6]. CXorf51B is not considered a classical therapeutic target (receptor, enzyme, transporter, etc.) and has no reported interacting drugs or clinical applications[1][6]. The functional significance and interaction network for CXorf51B remain largely unknown and a subject for future research[4].\n\nKey points:\n- CXorf51B is not a confirmed therapeutic target and is classified as an uncharacterized, intrinsically disordered protein without a well-defined physiological or pathological role[1][2][6].\n- No drugs, biomarkers, or safety concerns are associated with this molecule.\n- Its full biological significance remains to be established by ongoing basic research.

Other names

Chromosome X open reading frame 51BCXorf51BCXorf51Auncharacterized protein CXorf51Bchromosome X open reading frame 51