Intracellular hyaluronan-binding protein 4 (HABP4)

Intracellular hyaluronan-binding protein 4 (HABP4) is a human protein encoded by the HABP4 gene, located on chromosome 9q22.32. It is a ribosome-binding protein that promotes ribosome hibernation by stabilizing ribosomes in an inactive state, a mechanism important for ribosome preservation, especially in oocytes. HABP4 also binds RNA and is involved in the regulation of transcription and pre-mRNA splicing. It plays a role in PML-body organization within the nucleus and participates in responses to cellular mechanical stimulus. Additionally, HABP4 has been identified as the Ki-1/57 antigen, originally characterized in lymphoma cells but is not recognized as a major drug target or therapeutic protein at present[1][2][6][4][5]. Notes: - Based on available data, HABP4 is more typically recognized as a nuclear antigen, RNA-binding protein, or cellular regulator, rather than a classical therapeutic target (e.g., receptor, enzyme, transporter)[1][2][4][6]. - While hyaluronic acid may bind HABP4, this is not an approved or clinically validated drug-target interaction[2]. - There are no notable safety concerns or established therapeutic challenges because HABP4 is not an approved clinical drug target. - The aliases list is consolidated after reviewing synonym usage in molecular databases and publications[1][2].

Other names

Ki-1/57 intracellular antigenIHABP-4IHABP4SERBP1LHyaluronan-binding protein 4chromodomain helicase DNA binding protein 3 interacting proteinintracellular antigen detected by monoclonal antibody Ki-1

Not applicable—no established mechanism for approved drugs targeting this molecule