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The protein encoded by this gene 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 histone H1 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.[3]
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St John MA, Tao W, Fei X, et al. (1999). "Mice deficient of Lats1 develop soft-tissue sarcomas, ovarian tumours and pituitary dysfunction". Nat. Genet. 21 (2): 182–6. doi:10.1038/5965. PMID9988269.
Nishiyama Y, Hirota T, Morisaki T, et al. (1999). "A human homolog of Drosophila warts tumor suppressor, h-warts, localized to mitotic apparatus and specifically phosphorylated during mitosis". FEBS Lett. 459 (2): 159–65. doi:10.1016/S0014-5793(99)01224-7. PMID10518011.
Morisaki T, Hirota T, Iida S, et al. (2002). "WARTS tumor suppressor is phosphorylated by Cdc2/cyclin B at spindle poles during mitosis". FEBS Lett. 529 (2–3): 319–24. doi:10.1016/S0014-5793(02)03360-4. PMID12372621.
Hisaoka M, Tanaka A, Hashimoto H (2002). "Molecular alterations of h-warts/LATS1 tumor suppressor in human soft tissue sarcoma". Lab. Invest. 82 (10): 1427–35. doi:10.1097/01.lab.0000032381.68634.ca. PMID12379777.
Kamikubo Y, Takaori-Kondo A, Uchiyama T, Hori T (2003). "Inhibition of cell growth by conditional expression of kpm, a human homologue of Drosophila warts/lats tumor suppressor". J. Biol. Chem. 278 (20): 17609–14. doi:10.1074/jbc.M211974200. PMID12624101.
Brill LM, Salomon AR, Ficarro SB, et al. (2004). "Robust phosphoproteomic profiling of tyrosine phosphorylation sites from human T cells using immobilized metal affinity chromatography and tandem mass spectrometry". Anal. Chem. 76 (10): 2763–72. doi:10.1021/ac035352d. PMID15144186.
Yang X, Yu K, Hao Y, et al. (2004). "LATS1 tumour suppressor affects cytokinesis by inhibiting LIMK1". Nat. Cell Biol. 6 (7): 609–17. doi:10.1038/ncb1140. PMID15220930.
Chan EH, Nousiainen M, Chalamalasetty RB, et al. (2005). "The Ste20-like kinase Mst2 activates the human large tumor suppressor kinase Lats1". Oncogene. 24 (12): 2076–86. doi:10.1038/sj.onc.1208445. PMID15688006.
Takahashi Y, Miyoshi Y, Takahata C, et al. (2005). "Down-regulation of LATS1 and LATS2 mRNA expression by promoter hypermethylation and its association with biologically aggressive phenotype in human breast cancers". Clin. Cancer Res. 11 (4): 1380–5. doi:10.1158/1078-0432.CCR-04-1773. PMID15746036.
Kuninaka S, Nomura M, Hirota T, et al. (2005). "The tumor suppressor WARTS activates the Omi / HtrA2-dependent pathway of cell death". Oncogene. 24 (34): 5287–98. doi:10.1038/sj.onc.1208682. PMID16007220.
Jiang Z, Li X, Hu J, et al. (2007). "Promoter hypermethylation-mediated down-regulation of LATS1 and LATS2 in human astrocytoma". Neurosci. Res. 56 (4): 450–8. doi:10.1016/j.neures.2006.09.006. PMID17049657.
