Leucine-rich repeat kinase 2 (LRRK2), also known as dardarin (from the Basque word "dardara" which means trembling), is an enzyme that in humans is encoded by the PARK8gene.[1] LRRK2 is a member of the leucine-rich repeat kinase family. Variants of this gene are associated with an increased risk of Parkinson's disease and also Crohn's disease.[1][2]
LRRK2 interacts with the C-terminal R2 RING finger domain of parkin, and parkin interacted with the COR domain of LRRK2. Expression of mutant LRRK2 induced apoptotic cell death in neuroblastoma cells and in mouse cortical neurons.[3]
Expression of LRRK2 mutants implicated in autosomal dominant Parkinson's disease causes shortening and simplification of the dendritic tree in vivo and in cultured neurons.[4] This is mediated in part by alterations in macroautophagy,[5][6][7][8][9] and can be prevented by protein kinase A regulation of the autophagy protein LC3.[10] The G2019S and R1441C mutations elicit post-synaptic calcium imbalance, leading to excess mitochondrial clearance from dendrites by mitophagy.[11] LRRK2 is also a substrate for chaperone-mediated autophagy.[12]
The Gly2019Ser mutation in LRRK2 is a relatively common cause of familial Parkinson's disease in Caucasians.[14] It may also cause sporadic Parkinson's disease. The mutated Gly amino acid is conserved in all kinase domains of all species.
The Gly2019Ser mutation is one of a small number of LRRK2 mutations proven to cause Parkinson's disease. Of these, Gly2019Ser is the most common in the Western World, accounting for ~2% of all Parkinson's disease cases in North American Caucasians. This mutation is enriched in certain populations, being found in approximately 20% of all Ashkenazi Jewish Parkinson's disease patients and in approximately 40% of all Parkinson's disease patients of North African Berber Arab ancestry.[citation needed]
Unexpectedly, genomewide association studies have found an association between LRRK2 and Crohn's disease as well as with Parkinson's disease, suggesting that the two diseases share common pathways.[15][16]
Attempts have been made to grow crystals of the LRRK2 aboard the International Space Station, as the low-gravity environment renders the crystals less susceptible to sedimentation and convection, and thus easier to map.[17]
Mutations in the LRRK2 gene is the main factor in contributing to the genetic development of Parkinson's disease, and over 100 mutations in this gene have been shown to increase the chance of PD development. These mutations are most commonly seen in Jewish, North African Arab Berber, Chinese, and Japanese populations[18]
References
↑ 1.01.1Paisán-Ruíz C, Jain S, Evans EW, Gilks WP, Simón J, van der Brug M, López de Munain A, Aparicio S, Gil AM, Khan N, Johnson J, Martinez JR, Nicholl D, Carrera IM, Pena AS, de Silva R, Lees A, Martí-Massó JF, Pérez-Tur J, Wood NW, Singleton AB (November 2004). "Cloning of the gene containing mutations that cause PARK8-linked Parkinson's disease". Neuron. 44 (4): 595–600. doi:10.1016/j.neuron.2004.10.023. PMID15541308.
↑Zimprich A, Biskup S, Leitner P, Lichtner P, Farrer M, Lincoln S, Kachergus J, Hulihan M, Uitti RJ, Calne DB, Stoessl AJ, Pfeiffer RF, Patenge N, Carbajal IC, Vieregge P, Asmus F, Müller-Myhsok B, Dickson DW, Meitinger T, Strom TM, Wszolek ZK, Gasser T (November 2004). "Mutations in LRRK2 cause autosomal-dominant parkinsonism with pleomorphic pathology". Neuron. 44 (4): 601–7. doi:10.1016/j.neuron.2004.11.005. PMID15541309.
↑Manolio TA (July 2010). "Genomewide association studies and assessment of the risk of disease". The New England Journal of Medicine. 363 (2): 166–76. doi:10.1056/NEJMra0905980. PMID20647212.
↑Carreau, Mark (November 14, 2018). "ISS Cargo Missions To Test Soyuz, Deliver New Science". Aviation Week. A collaboration between the Michael J. Fox Foundation, of New York City, and Merck Research Laboratories, of Kenilworth, New Jersey, will seek to grow crystals of a key gene protein, Leucine-Rich Repeat Kinase 2 (LRRK2), in an effort to advance the search for a cure for Parkinson’s disease. Crystals cultured in the absence of gravity are less susceptible to sedimentation and convection, rendering them larger and easier to map than those grown in labs on Earth in order to design medicines.
Singleton AB (August 2005). "Altered alpha-synuclein homeostasis causing Parkinson's disease: the potential roles of dardarin". Trends in Neurosciences. 28 (8): 416–21. doi:10.1016/j.tins.2005.05.009. PMID15955578.
Mata IF, Wedemeyer WJ, Farrer MJ, Taylor JP, Gallo KA (May 2006). "LRRK2 in Parkinson's disease: protein domains and functional insights". Trends in Neurosciences. 29 (5): 286–93. doi:10.1016/j.tins.2006.03.006. PMID16616379.
Haugarvoll K, Wszolek ZK (July 2006). "PARK8 LRRK2 parkinsonism". Current Neurology and Neuroscience Reports. 6 (4): 287–94. doi:10.1007/s11910-006-0020-0. PMID16822348.
Bonifati V (September 2006). "The pleomorphic pathology of inherited Parkinson's disease: lessons from LRRK2". Current Neurology and Neuroscience Reports. 6 (5): 355–7. doi:10.1007/s11910-996-0013-z. PMID16928343.
Schapira AH (September 2006). "The importance of LRRK2 mutations in Parkinson disease". Archives of Neurology. 63 (9): 1225–8. doi:10.1001/archneur.63.9.1225. PMID16966498.
Whaley NR, Uitti RJ, Dickson DW, Farrer MJ, Wszolek ZK (2006). "Clinical and pathologic features of families with LRRK2-associated Parkinson's disease". Journal of Neural Transmission. Supplementum. Journal of Neural Transmission. Supplementa. 70 (70): 221–9. doi:10.1007/978-3-211-45295-0_34. ISBN978-3-211-28927-3. PMID17017533.
Gasser T (2006). "Molecular genetic findings in LRRK2 American, Canadian and German families". Journal of Neural Transmission. Supplementum. Journal of Neural Transmission. Supplementa. 70 (70): 231–4. doi:10.1007/978-3-211-45295-0_35. ISBN978-3-211-28927-3. PMID17017534.
Tan EK (November 2006). "Identification of a common genetic risk variant (LRRK2 Gly2385Arg) in Parkinson's disease". Annals of the Academy of Medicine, Singapore. 35 (11): 840–2. PMID17160203.