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LATS1 is a putative serine/threonine kinase that localizes to the mitotic apparatus and complexes with cell cycle controller CDC2 kinase in early mitosis. The protein is phosphorylated in a cell-cycle dependent manner, with late prophase phosphorylation remaining through metaphase. The N-terminal region of the protein binds CDC2 to form a complex showing reduced H1 histone kinase activity, indicating a role as a negative regulator of CDC2/cyclin A. In addition, the C-terminal kinase domain binds to its own N-terminal region, suggesting potential negative regulation through interference with complex formation via intramolecular binding. Biochemical and genetic data suggest a role as a tumor suppressor. This is supported by studies in knockout mice showing development of soft-tissue sarcomas, ovarian stromal cell tumors and a high sensitivity to carcinogenic treatments.
Protein Aliases: h-warts; Large tumor suppressor homolog 1; large tumor supressor, homolog 1; LATS (large tumor suppressor, Drosophila) homolog 1; LATS, large tumor suppressor, homolog 1; LATS1; Serine/threonine-protein kinase LATS1; WARTS protein kinase
Gene Aliases: AW208599; LATS1; WARTS; wts
Molecular Function: non-receptor serine/threonine protein kinase