| Structural highlights
Disease
LRRK2_HUMAN Defects in LRRK2 are the cause of Parkinson disease type 8 (PARK8) [MIM:607060. A slowly progressive neurodegenerative disorder characterized by bradykinesia, rigidity, resting tremor, postural instability, neuronal loss in the substantia nigra, and the presence of neurofibrillary MAPT (tau)-positive and Lewy bodies in some patients.[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34]
Function
LRRK2_HUMAN May play a role in the phosphorylation of proteins central to Parkinson disease. Phosphorylates PRDX3. May also have GTPase activity. Positively regulates autophagy through a calcium-dependent activation of the CaMKK/AMPK signaling pathway. The process involves activation of nicotinic acid adenine dinucleotide phosphate (NAADP) receptors, increase in lysosomal pH, and calcium release from lysosomes.[35] [36] [37] [38]
Publication Abstract from PubMed
The leucine-rich repeat kinase 2 (LRRK2) phosphorylates a subset of RAB GTPases, and their phosphorylation levels are elevated by Parkinson's disease (PD)-linked mutations of LRRK2. However, the precise function of the LRRK2-regulated RAB GTPase in the brain remains to be elucidated. Here, we identify RAB12 as a robust LRRK2 substrate in the mouse brain through phosphoproteomics profiling and solve the structure of RAB12-LRRK2 protein complex through Cryo-EM analysis. Mechanistically, RAB12 cooperates with LRRK2 to inhibit primary ciliogenesis and regulate centrosome homeostasis in astrocytes through enhancing the phosphorylation of RAB10 and recruiting RILPL1, while the functions of RAB12 require a direct interaction with LRRK2 and LRRK2 activity. Furthermore, the ciliary and centrosome defects caused by the PD-linked LRRK2-G2019S mutation are prevented by Rab12 deletion in astrocytes. Thus, our study reveals a physiological function of the RAB12-LRRK2 complex in regulating ciliogenesis and centrosome homeostasis. The RAB12-LRRK2 structure offers a guidance in the therapeutic development of PD by targeting the RAB12-LRRK2 interaction.
RAB12-LRRK2 complex suppresses primary ciliogenesis and regulates centrosome homeostasis in astrocytes.,Li X, Zhu H, Huang BT, Li X, Kim H, Tan H, Zhang Y, Choi I, Peng J, Xu P, Sun J, Yue Z Nat Commun. 2024 Sep 29;15(1):8434. doi: 10.1038/s41467-024-52723-6. PMID:39343966[39]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
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- ↑ Angeles DC, Gan BH, Onstead L, Zhao Y, Lim KL, Dachsel J, Melrose H, Farrer M, Wszolek ZK, Dickson DW, Tan EK. Mutations in LRRK2 increase phosphorylation of peroxiredoxin 3 exacerbating oxidative stress-induced neuronal death. Hum Mutat. 2011 Dec;32(12):1390-7. doi: 10.1002/humu.21582. Epub 2011 Sep 12. PMID:21850687 doi:10.1002/humu.21582
- ↑ Gomez-Suaga P, Luzon-Toro B, Churamani D, Zhang L, Bloor-Young D, Patel S, Woodman PG, Churchill GC, Hilfiker S. Leucine-rich repeat kinase 2 regulates autophagy through a calcium-dependent pathway involving NAADP. Hum Mol Genet. 2012 Feb 1;21(3):511-25. doi: 10.1093/hmg/ddr481. Epub 2011 Oct, 19. PMID:22012985 doi:10.1093/hmg/ddr481
- ↑ Li X, Zhu H, Huang BT, Li X, Kim H, Tan H, Zhang Y, Choi I, Peng J, Xu P, Sun J, Yue Z. RAB12-LRRK2 complex suppresses primary ciliogenesis and regulates centrosome homeostasis in astrocytes. Nat Commun. 2024 Sep 29;15(1):8434. PMID:39343966 doi:10.1038/s41467-024-52723-6
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