LATS1 Antibody – Rabbit Polyclonal

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 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. Two protein-coding transcripts and one non-protein coding transcript have been found for this gene. [provided by RefSeq, Jul 2012]

LATS1: an AGC kinase of the NDR family of kinases. Localized to the mitotic apparatus and specifically phosphorylated during mitosis. A likely tumor suppressor which plays a critical role in maintenance of ploidy through its actions in both mitotic progression and the G1 tetraploidy checkpoint. Negatively regulates G2/M transition by down-regulating CDC2 kinase activity, causing G2 arrest. Involved in the control of p53 expression. Affects cytokinesis by regulating actin polymerization through negative modulation of LIMK1. Complexes with CDC2 in early mitosis. LATS1-associated CDC2 has no mitotic cyclin partner and no apparent kinase activity. Binds phosphorylated zyxin, locating this protein to the mitotic spindle and suggesting a role for actin regulatory proteins during mitosis. Binds to and colocalizes with LIMK1 at the actomyosin contractile ring during cytokinesis. Knockout mice are susceptible to soft-tissue sarcomas and sensitive to chemical carcinogenesis. Human soft tissue sarcomas have downregulated, mutated, and/or hypermethylated LATS1. Transgenic expression blocks anchorage independent growth in culture and tumor growth in xenografts. Two alternatively spliced isoforms of the human proteinhave been described.

Protein type: Kinase, protein; Tumor suppressor; EC 2.7.11.1; Protein kinase, AGC; Protein kinase, Ser/Thr (non-receptor); AGC group; NDR family

Chromosomal Location of Human Ortholog: 6q25.1

Cellular Component: spindle pole; microtubule organizing center; cytosol

Molecular Function: protein serine/threonine kinase activity; protein binding; magnesium ion binding; protein kinase binding; ATP binding

Biological Process: keratinocyte differentiation; mitosis; regulation of actin filament polymerization; hormone-mediated signaling; cell division; negative regulation of cyclin-dependent protein kinase activity; cytoplasmic sequestering of protein; sister chromatid segregation; regulation of protein complex assembly; G2/M transition of mitotic cell cycle; positive regulation of peptidyl-serine phosphorylation; protein amino acid phosphorylation