LRRK2 (leucine-rich repeat serine/threonine-protein kinase 2, also called PARK8 or Dardarin) is a homodimeric multifunctional protein that belongs to TKL serine threonine protein kinases family and LRRK2 immunoreactivity has been documented in neurofibrillary tangles in Alzheimer's disease as well as in PDCG (parkinsonism-dementia complex of Guam). Highly expressed in tissues such as liver, heart, brain etc., LRRK2 localizes to cellular cytoplasm and also associates with membrane structures including mitochondrial outer membrane. LRRK interacts with PARK2, PRDX3 and TPCN2, and phosphorylate proteins which are implicated in Parkinson disease. LRRK2 is a cytoplasmic kinase with autophosphorylation capability as well as GTPase activity. Its interaction with microtubules suggests that LRRK2-induced neurodegeneration might be partly mediated via inhibition of microtubule dynamics, and LRRK2 -mitochondria interactiosn suggests its implication in pathways eliciting ROS mediated damage. LRRK2 has been shown exert positive regulation in autophagy via calcium-sensitive activation of CaMKK/AMPK signaling pathway through activation of NAADP receptors, increase of lysosomal pH as well as calcium release.