Protein Hook homolog 1 (HOOK1)

Protein Hook homolog 1 (HOOK1) is a cytoskeletal adaptor protein encoded by the HOOK1 gene in humans. It is a member of the hook family of coiled-coil proteins and functions primarily by binding microtubules and organelles at opposite termini, thus facilitating the spatial organization of intracellular vesicles and organelles. HOOK1 forms a core part of large multiprotein complexes such as the FTS/Hook/FHIP complex and interacts closely with endocytic Rab GTPases and the vesicle fusion machinery (e.g., the HOPS complex), playing a central role in linking endocytic membrane trafficking with the microtubule cytoskeleton. It is essential in processes like receptor-mediated endocytosis, perinuclear organelle positioning, and spermatid differentiation, and is particularly critical for the proper organization of manchette and flagellar microtubules in sperm cells. Dysregulation or loss of HOOK1 has been implicated in certain cancers (with its loss linked to increased metastasis and chemoresistance) and in rare forms of male infertility. There are no approved drugs known to directly target HOOK1, and it is not considered a canonical therapeutic target such as a receptor, enzyme, transporter, or ion channel. Note: - Protein Hook homolog 1 is best classified as an intracellular adaptor or scaffolding protein participating in cellular trafficking and cytoskeleton organization, and not as a canonical drug target. - There is no evidence of clinically approved drugs or experimental compounds that modulate HOOK1 directly, nor established biomarker or patient selection strategies based on HOOK1 status. - Disease associations are primarily through loss-of-function or reduced expression rather than gain-of-function or targeted inhibition.

Other names

HOOK1HK1h-hook1hHK1hook microtubule tethering protein 1hook microtubule-tethering protein 1hook homolog 1