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Leucine rich repeate kinase

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https://www.readbyqxmd.com/read/28220423/leeix2-interactors-analysis-and-eix-mediated-responses-measurement
#1
Meirav Leibman-Markus, Silvia Schuster, Adi Avni
Plant-pathogen interactions involve a large number of wide regulatory systems, necessary for plant defense responses against pathogen attack. The fungal protein ethylene-inducing xylanase (EIX) elicits defense responses in specific cultivars of tobacco and tomato. The response to EIX is controlled by a single locus encoding for LeEIX2, a leucine-rich-repeat receptor-like-protein (LRR-RLP). As an RLP, LeEIX2 does not possess an obvious cytoplasmic signaling moiety such as a kinase domain. To study LeEIX2 mode of action, it is essential to identify the potential interactors involved after EIX perception...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28218415/reduced-penetrance-of-leucine-rich-repeat-kinase-2-mutations-discovering-genetic-factors-of-endogenous-disease-protection
#2
Alexander Balck, Christine Klein
No abstract text is available yet for this article.
February 20, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28215032/nlrp3-inflammasome-activation-regulated-by-nf-%C3%AE%C2%BAb-and-dapk-contributed-to-paraquat-induced-acute-kidney-injury
#3
Zhenning Liu, Xiaokai Wang, Yu Wang, Min Zhao
Paraquat can result in dysfunction of multiple organs after ingestion in human. However, the mechanisms of nucleotide-binding domain and leucine-rich repeat containing protein 3 (NLRP3) inflammasome activation in acute kidney injury have not been clearly demonstrated. The aim of this study was to determine the effect of NLRP3 inflammasome activation and its regulation by nuclear factor-kappa B (NF-κB) and death-associated protein kinase (DAPK). Male Wistar rats were treated with intraperitoneal injection of paraquat at 20 mg/kg, and NF-κB inhibitor BAY 11-7082 was pretreated at 10 mg/kg 1 h before paraquat exposure...
February 18, 2017: Immunologic Research
https://www.readbyqxmd.com/read/28214100/nlrp6-a-multifaceted-innate-immune-sensor
#4
REVIEW
Maayan Levy, Hagit Shapiro, Christoph A Thaiss, Eran Elinav
NLRP6, a member of the nucleotide-binding domain, leucine-rich repeat-containing (NLR) innate immune receptor family, regulates inflammation and host defense against microorganisms. Similar to other NLRs, NLRP6 not only participates in inflammasome formation, but is also involved in nuclear factor-κB (NF-κB) and mitogen-activated protein kinase (MAPK) signaling regulation and facilitation of gastrointestinal antiviral effector functions. Additionally, NLRP6 contributes to the regulation of mucus secretion and antimicrobial peptide production, thereby impacting intestinal microbial colonization and associated microbiome-related infectious, autoinflammatory, metabolic, and neoplastic diseases...
February 14, 2017: Trends in Immunology
https://www.readbyqxmd.com/read/28202680/cross-talk-between-lrrk2-and-pka-implication-for-parkinson-s-disease
#5
REVIEW
Elisa Greggio, Luigi Bubacco, Isabella Russo
Evidence indicates that leucine-rich repeat kinase 2 (LRRK2) controls multiple processes in neurons and glia cells. Deregulated LRRK2 activity due to gene mutation represents the most common cause of autosomal dominant Parkinson's disease (PD). Protein kinase A (PKA)-mediated signaling is a key regulator of brain function. PKA-dependent pathways play an important role in brain homeostasis, neuronal development, synaptic plasticity, control of microglia activation and inflammation. On the other hand, a decline of PKA signaling was shown to contribute to the progression of several neurodegenerative diseases, including PD...
February 8, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/28202674/lrrk2-detection-in-human-biofluids-potential-use-as-a-parkinson-s-disease-biomarker
#6
REVIEW
Jean-Marc Taymans, Eugénie Mutez, Matthieu Drouyer, William Sibran, Marie-Christine Chartier-Harlin
Leucine-rich repeat kinase 2 (LRRK2) is a complex signalling protein that is a key therapeutic target, particularly in Parkinson's disease (PD). In addition, there is now evidence showing that LRRK2 expression and phosphorylation levels have potential as markers of disease or target engagement. Indeed, reports show increases in LRRK2 protein levels in the prefrontal cortex of PD patients relative to controls, suggesting that increase in total LRRK2 protein expression is correlated with disease progression. LRRK2 phosphorylation levels are reduced in experimental systems for most disease mutants, and LRRK2 is also rapidly dephosphorylated upon LRRK2 inhibitor treatment, considered potential therapeutics...
February 8, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/28202670/mechanisms-of-lrrk2-dependent-neurodegeneration-role-of-enzymatic-activity-and-protein-aggregation
#7
REVIEW
Md Shariful Islam, Darren J Moore
Mutations in the leucine-rich repeat kinase 2 (LRRK2) gene are the most common cause of familial Parkinson's disease (PD) with autosomal dominant inheritance. Accordingly, LRRK2 has emerged as a promising therapeutic target for disease modification in PD. Since the first discovery of LRRK2 mutations some 12 years ago, LRRK2 has been the subject of intense investigation. It has been established that LRRK2 can function as a protein kinase, with many putative substrates identified, and can also function as a GTPase that may serve in part to regulate kinase activity...
February 8, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/28202669/the-lrrk2-macroautophagy-axis-and-its-relevance-to-parkinson-s-disease
#8
REVIEW
Claudia Manzoni
A wide variety of different functions and an impressive array of interactors have been associated with leucine-rich repeat kinase 2 (LRRK2) over the years. Here, I discuss the hypothesis that LRRK2 may be capable of interacting with different proteins at different times and places, therefore, controlling a plethora of diverse functions based on the different complexes formed. Among these, I will then focus on macroautophagy in the general context of the endolysosomal system. First, the relevance of autophagy in Parkinson's disease will be evaluated giving a brief overview of all the relevant Parkinson's disease genes; then, the association of LRRK2 with macroautophagy and the endolysosomal pathway will be analyzed based on the supporting literature...
February 8, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/28202668/cellular-effects-mediated-by-pathogenic-lrrk2-homing-in-on-rab-mediated-processes
#9
REVIEW
Jesús Madero-Pérez, Elena Fdez, Belén Fernández, Antonio Jesús Lara Ordóñez, Marian Blanca Ramírez, María Romo Lozano, Pilar Rivero-Ríos, Sabine Hilfiker
Leucine-rich repeat kinase 2 (LRRK2) is a key player in the pathogenesis of Parkinson's disease. Mutations in LRRK2 are associated with increased kinase activity that correlates with cytotoxicity, indicating that kinase inhibitors may comprise promising disease-modifying compounds. However, before embarking on such strategies, detailed knowledge of the cellular deficits mediated by pathogenic LRRK2 in the context of defined and pathologically relevant kinase substrates is essential. LRRK2 has been consistently shown to impair various intracellular vesicular trafficking events, and recent studies have shown that LRRK2 can phosphorylate a subset of proteins that are intricately implicated in those processes...
February 8, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/28202667/lrrk2-from-kinase-to-gtpase-to-microtubules-and-back
#10
REVIEW
Marian Blanca Ramírez, Antonio Jesús Lara Ordóñez, Elena Fdez, Sabine Hilfiker
Mutations in the Leucine-Rich Repeat Kinase 2 (LRRK2) gene are intimately linked to both familial and sporadic Parkinson's disease. LRRK2 is a large protein kinase able to bind and hydrolyse GTP. A wealth of in vitro studies have established that the distinct pathogenic LRRK2 mutants differentially affect those enzymatic activities, either causing an increase in kinase activity without altering GTP binding/GTP hydrolysis, or displaying no change in kinase activity but increased GTP binding/decreased GTP hydrolysis...
February 8, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/28202666/lrrk2-in-peripheral-and-central-nervous-system-innate-immunity-its-link-to-parkinson-s-disease
#11
REVIEW
Heyne Lee, William S James, Sally A Cowley
Mutations in the leucine-rich repeat kinase 2 (LRRK2) gene are found in familial and idiopathic cases of Parkinson's disease (PD), but are also associated with immune-related disorders, notably Crohn's disease and leprosy. Although the physiological function of LRRK2 protein remains largely elusive, increasing evidence suggests that it plays a role in innate immunity, a process that also has been implicated in neurodegenerative diseases, including PD. Innate immunity involves macrophages and microglia, in which endogenous LRRK2 expression is precisely regulated and expression is strongly up-regulated upon cell activation...
February 8, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/28202665/neuronal-death-signaling-pathways-triggered-by-mutant-lrrk2
#12
REVIEW
Hardy J Rideout
Autosomal dominantly inherited mutations in the gene encoding leucine-rich repeat kinase 2 (LRRK2) are the most common genetic cause of Parkinson's disease. While considerable progress has been made in understanding its function and the many different cellular activities in which it participates, a clear understanding of the mechanism(s) of the induction of neuronal death by mutant forms of LRRK2 remains elusive. Although several in vivo models have documented the progressive loss of dopaminergic neurons of the substantia nigra, more complete interrogations of the modality of neuronal death have been gained from cellular models...
February 8, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/28202664/lrrk2-mouse-models-dissecting-the-behavior-striatal-neurochemistry-and-neurophysiology-of-pd-pathogenesis
#13
REVIEW
Mattia Volta, Heather Melrose
Mutations in leucine-rich repeat kinase 2 (LRRK2) are the most common genetic cause of familial Parkinson's disease (PD), resembling the sporadic disorder. Intensive effort has been directed toward LRRK2 mouse modeling and investigation, aimed at reproducing the human disease to inform mechanistic studies of pathogenesis and design of neuroprotective therapies. The physiological function of LRRK2 is still under exploration, but a clear role in striatal neurophysiology and animal behavior has emerged. Alterations in LRRK2 impair dopamine (DA) transmission, regulation and signaling, in addition to corticostriatal synaptic plasticity...
February 8, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/28187200/ligand-induced-dynamics-of-heterotrimeric-g-protein-coupled-receptor-like-kinase-complexes
#14
Meral Tunc-Ozdemir, Alan M Jones
BACKGROUND: Arabidopsis, 7-transmembrane Regulator of G signaling protein 1 (AtRGS1) modulates canonical G protein signaling by promoting the inactive state of heterotrimeric G protein complex on the plasma membrane. It is known that plant leucine-rich repeat receptor-like kinases (LRR RLKs) phosphorylate AtRGS1 in vitro but little is known about the in vivo interaction, molecular dynamics, or the cellular consequences of this interaction. METHODS: Therefore, a subset of the known RLKs that phosphorylate AtRGS1 were selected for elucidation, namely, BAK1, BIR1, FLS2...
2017: PloS One
https://www.readbyqxmd.com/read/28186666/impaired-intracortical-transmission-in-g2019s-leucine-rich-repeat-kinase-parkinson-patients
#15
Viviana Ponzo, Francesco Di Lorenzo, Livia Brusa, Tommaso Schirinzi, Stefania Battistini, Claudia Ricci, Manolo Sambucci, Carlo Caltagirone, Giacomo Koch
OBJECTIVES: A mutation in leucine-rich repeat kinase 2 is the most common cause of hereditary Parkinson's disease (PD), yet the neural mechanisms and the circuitry potentially involved are poorly understood. METHODS: We used different transcranial magnetic stimulation protocols to explore in the primary motor cortex the activity of intracortical circuits and cortical plasticity (long-term potentiation) in patients with the G2019S leucine-rich repeat kinase 2 gene mutation when compared with idiopathic PD patients and age-matched healthy subjects...
February 10, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28173747/origin-and-diversification-of-leucine-rich-repeat-receptor-like-protein-kinase-lrr-rlk-genes-in-plants
#16
Ping-Li Liu, Liang Du, Yuan Huang, Shu-Min Gao, Meng Yu
BACKGROUND: Leucine-rich repeat receptor-like protein kinases (LRR-RLKs) are the largest group of receptor-like kinases in plants and play crucial roles in development and stress responses. The evolutionary relationships among LRR-RLK genes have been investigated in flowering plants; however, no comprehensive studies have been performed for these genes in more ancestral groups. The subfamily classification of LRR-RLK genes in plants, the evolutionary history and driving force for the evolution of each LRR-RLK subfamily remain to be understood...
February 7, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28168579/lrrk2-an-emerging-new-molecule-in-the-enteric-neuronal-system-that-quantitatively-regulates-neuronal-peptides-and-iga-in-the-gut
#17
Tatsunori Maekawa, Hitomi Shimayama, Hiromichi Tsushima, Fumitaka Kawakami, Rei Kawashima, Makoto Kubo, Takafumi Ichikawa
BACKGROUND: Leucine-rich repeat kinase 2 (LRRK2) is a recently discovered molecule associated with familial and sporadic Parkinson's disease. It regulates many central neuronal functions such as cell proliferation, apoptosis, autophagy, and axonal extension. However, in contrast to the well-documented function of LRRK2 in central neurons, it is unclear whether LRRK2 is expressed in enteric neurons and affects the physiology of the gut. AIMS: By examining LRRK2-KO mice, this study investigated whether enteric neurons express LRRK2 and whether intestinal neuronal peptides and IgA are quantitatively changed...
February 6, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28160489/sec16-in-conventional-and-unconventional-exocytosis-working-at-the-interface-of-membrane-traffic-and-secretory-autophagy
#18
REVIEW
Bor Luen Tang
Sec16 is classically perceived to be a scaffolding protein localized to the transitional endoplasmic reticulum (tER) or the ER exit sites (ERES), and has a conserved function in facilitating coat protein II (COPII) complex-mediated ER exit. Recent findings have however pointed towards a role for Sec16 in unconventional exocytosis of certain membrane proteins, such as the Cystic fibrosis transmembrane conductance regulator (CFTR) in mammalian cells, and possibly also α-integrin in certain contexts of Drosophila development...
February 4, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28153720/overexpression-of-bak1-causes-salicylic-acid-accumulation-and-deregulation-of-cell-death-control-genes
#19
Sun Young Kim, Yun Shang, Se-Hwan Joo, Seong-Ki Kim, Kyoung Hee Nam
Since the BRI1-Associated Receptor Kinase 1 (BAK1) was firstly identified as a co-receptor of BRI1 that mediates brassinosteroids (BR) signaling, the functional roles of BAK1, as a versatile co-receptor for various ligand-binding leucine-rich repeat (LRR)-containing receptor-like kinase (RLKs), are being extended to involvement with plant immunity, cell death, stomatal development and ABA signaling in plants. During more than a decade of research on the BAK1, it has been known that transgenic Arabidopsis plants overexpressing BAK1 tagged with various reporters do not fully represent its natural functions...
January 31, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28144698/fine-mapping-qfs07-1-controlling-fiber-strength-in-upland-cotton-gossypium-hirsutum-l
#20
Xiaomei Fang, Xueying Liu, Xiaoqin Wang, Wenwen Wang, Dexin Liu, Jian Zhang, Dajun Liu, Zhonghua Teng, Zhaoyun Tan, Fang Liu, Fengjiao Zhang, Maochao Jiang, Xiuling Jia, Jianwei Zhong, Jinghong Yang, Zhengsheng Zhang
KEY MESSAGE: qFS07.1 controlling fiber strength was fine-mapped to a 62.6-kb region containing four annotated genes. RT-qPCR and sequence of candidate genes identified an LRR RLK gene as the most likely candidate. Fiber strength is an important component of cotton fiber quality and is associated with other properties, such as fiber maturity, fineness, and length. Stable QTL qFS07.1, controlling fiber strength, had been identified on chromosome 7 in an upland cotton recombinant inbred line (RIL) population from a cross (CCRI35 × Yumian1) described in our previous studies...
January 31, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
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