| Modification Notes |
Members of the protein kinase C (PKC) family play a key regulatory role in a variety of cellular functions including cell growth and differentiation, gene expression, hormone secretion and membrane function. PKCs were originally identified as serine/threonine protein kinases whose activity was dependent on calcium and phospholipids. LIP1 (LKB1-interacting protein 1), also known as STK11IP (serine/threonine kinase 11 interacting protein), LKB1IP or STK11IP1, is a 1,099 amino acid cytoplasmic protein containing six LRR (leucine-rich) repeats. LIP1 forms a ternary complex that is composed of LKB1 and TGF-beta-regulated transcription factor Smad4. LIP1 may participate in regulating LKB1 function by controlling its subcellular localization. LIP1 is encoded by a gene located on human chromosome 2, which houses over 1,400 genes and comprises nearly 8% of the human genome. |