International Journal of Molecular Sciences Article A Novel LRRK2 Variant p.G2294R in the WD40 Domain Identified in Familial Parkinson’s Disease Affects LRRK2 Protein Levels Jun Ogata 1, Kentaro Hirao 2, Kenya Nishioka 3 , Arisa Hayashida 3, Yuanzhe Li 3, Hiroyo Yoshino 4, Soichiro Shimizu 2, Nobutaka Hattori 1,3,4 and Yuzuru Imai 1,* 1 Department of Research for Parkinson’s Disease, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan;
[email protected] (J.O.);
[email protected] (N.H.) 2 Department of Geriatric Medicine, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan;
[email protected] (K.H.);
[email protected] (S.S.) 3 Department of Neurology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan;
[email protected] (K.N.);
[email protected] (A.H.);
[email protected] (Y.L.) 4 Research Institute for Diseases of Old Age, Graduate School of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan;
[email protected] * Correspondence:
[email protected]; Tel.: +81-3-6801-8332 Abstract: Leucine-rich repeat kinase 2 (LRRK2) is a major causative gene of late-onset familial Parkin- son’s disease (PD). The suppression of kinase activity is believed to confer neuroprotection, as most pathogenic variants of LRRK2 associated with PD exhibit increased kinase activity. We herein report a novel LRRK2 variant—p.G2294R—located in the WD40 domain, detected through targeted gene- Citation: Ogata, J.; Hirao, K.; panel screening in a patient with familial PD.