Kinetochore-localized astrin (SPAG5) binding protein (KNSTRN)

Kinetochore-localized astrin (SPAG5) binding protein (KNSTRN) is a centromere- and spindle-associated protein essential for accurate chromosome alignment and segregation during mitosis[1][2][3][5]. It forms a complex with astrin (SPAG5) to stabilize microtubule-kinetochore attachments and ensure the proper timing of sister chromatid segregation and spindle architecture[1][2][3]. KNSTRN is implicated in the metaphase-to-anaphase transition and maintains chromosome stability. Somatic mutations and overexpression of KNSTRN occur in several malignancies, including cutaneous squamous cell carcinoma, melanoma, and bladder cancer, and are associated with poor prognosis and chemoresistance[3]. KNSTRN is investigated as a prognostic biomarker and a potential therapeutic target, particularly within the context of tumor proliferation, mitotic control, and the tumor immune microenvironment[3]. There are currently no specific therapies directly targeting KNSTRN, but its level correlates with resistance to several anticancer agents[3].

Other names

Small kinetochore-associated proteinSmall kinetochore associated proteinKinetochore-localized astrin-binding proteinKinetochore-localized astrin/SPAG5-binding proteinTRAF4 associated factor 1TRAF4-associated factor 1Putative TRAF4-associated factor 1Chromosome 15 open reading frame 23C15orf23HSD11ROCHISSKAPKinastrinFLJ14502

Not directly drugged to date; mechanisms in cancer are based on: - Inhibition or alteration could disrupt mitosis and chromosome segregation, potentially leading to cell cycle arrest and apoptosis in dividing cells - Overexpression promotes AKT signaling, linked to metastasis and chemoresistance in cancer[3]