The Arabidopsis MEKK1-MKK1/MKK2-MPK4 kinase cascade is monitored by the nucleotide-binding leucine-rich-repeat immune receptor SUMM2. Disruption of this kinase cascade leads to activation of SUMM2-mediated immune responses. MEKK2, a close paralog of MEKK1, is required for defense responses mediated by SUMM2, the molecular mechanism of which is unclear. In this study, we showed that MEKK2 serves as a negative regulator of MPK4. It binds to MPK4 to directly inhibit its phosphorylation by upstream MKKs. Activation of SUMM2-mediated defense responses induces the expression of MEKK2, which in turn blocks MPK4 phosphorylation to further amplify immune responses mediated by SUMM2. Intriguingly, MEKK2 locates in a tandem repeat consisting of MEKK1, MEKK2 and MEKK3, which was generated from a recent gene duplication event, suggesting that MEKK2 evolved from a MAPKKK to become a negative regulator of MAP kinases.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/tpj.14763 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
DLK-dependent axonal mitochondrial fission drives degeneration after axotomy.
Nat Commun
December 2024
Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA.
Currently there are no effective treatments for an array of neurodegenerative disorders to a large part because cell-based models fail to recapitulate disease. Here we develop a reproducible human iPSC-based model where laser axotomy causes retrograde axon degeneration leading to neuronal cell death. Time-lapse confocal imaging revealed that damage triggers an apoptotic wave of mitochondrial fission proceeding from the site of injury to the soma.
View Article and Find Full Text PDFStudy of the effect of azithromycin on airway remodeling in asthma via the SAPK/JNK pathway.
J Cardiothorac Surg
December 2024
Department of Internal Medicine, the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Shangcheng District, Hangzhou, China, 310009.
Objective: Asthma is a prevalent status attributing to lower respiratory tract chronic inflammation. Azithromycin (AZM) is known to be effective against asthma. Thus, this study delved into the mechanism of AZM repressing airway remodeling (AR) via the SAPK/JNK pathway in asthma.
View Article and Find Full Text PDFUpregulation of GSTP1 mediated by chimeric TFE3 promotes TFE3-tRCC progression by targeting JNK signaling pathway.
World J Surg Oncol
December 2024
Department of Urology, Nanjing Drum Tower Hospital, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Jiangsu, Nanjing, 210008, China.
Background: TFE3-translocation renal cell carcinoma (TFE3-tRCC), a distinct subtype of kidney cancer characterized by Xp11.2 translocations, involving TFE3 fusion with various partner genes, lacks effective treatments and prognostic biomarkers for advanced stages. This study aimed to unravel the pathogenic mechanisms and uncover novel therapeutic targets.
View Article and Find Full Text PDFLenalidomide regulates the CCL21/CCR7/ERK1/2 axis to inhibit migration and proliferation in diffuse large B-cell lymphoma.
Oncol Res
December 2024
Department of Pathology, Guizhou Medical University, The Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China.
Background: The prognostic significance of the chemokine receptor CCR7 in diffuse large B-cell lymphoma (DLBCL) has been reported previously. However, the detailed mechanisms of CCR7 in DLBCL, particularly regarding its interaction with lenalidomide treatment, are not fully understood.
Methods: Our study utilized bioinformatics approaches to identify hub genes in SU-DHL-2 cell lines treated with lenalidomide compared to control groups.
Chuanxiong Rhizoma regulates ferroptosis and the immune microenvironment in ischemic stroke through the JAK-STAT3 pathway.
Sci Rep
December 2024
Acupuncture and Moxibustion College, Liaoning University of Traditional Chinese Medicine, Shenyang, 110847, China.
Ferroptosis is linked to various pathological conditions; however, the specific targets and mechanisms through which traditional Chinese medicine influences ischemic stroke (IS)-induced ferroptosis remain poorly understood. In this study, data from the Gene Expression Omnibus and disease target databases (OMIM, GeneCards, DisGeNet, TTD, and DrugBank) were integrated with ferroptosis-related gene datasets. To identify key molecular targets of Chuanxiong Rhizoma (CX), drug ingredient databases, including PubChem and TCMBank, were employed to map CX-related targets (CX-DEGs-FRG and CX-IS-FRG).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!