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https://www.readbyqxmd.com/read/29755680/cop9-signalosome-subunit-5-regulates-cancer-metastasis-by-deubiquitinating-snail
#1
Kensuke Watanabe, Satoru Yokoyama, Naoki Kaneto, Takashi Hori, Yusuke Iwakami, Shinichiro Kato, Yoshihiro Hayakawa, Hiroaki Sakurai, Junya Fukuoka, Ikuo Saiki
Cancer metastasis is a major cause of mortality in cancer patients. The transcription factor SNAIL plays an important role in cancer metastasis and progression, and its expression is tightly regulated by the ubiquitin-proteasome system through the balance between ubiquitin ligases and deubiquitinating enzymes. While several ubiquitin ligases of SNAIL have been identified, it is not yet clear regarding deubiquitinating enzyme. In this study, we identified COP9 signalosome subunit 5 (COPS5) as a deubiquitinating enzyme of SNAIL by using siRNA library screening...
April 17, 2018: Oncotarget
https://www.readbyqxmd.com/read/29707311/cop9-signalosome-subunit-csn5-but-not-csn6-is-upregulated-in-lung-adenocarcinoma-and-predicts-poor-prognosis
#2
Dakai Xiao, Shengli Yang, Liyan Huang, Huiming He, Hui Pan, Jianxing He
Background: The COP9 signalosome (CSN) is an evolutionarily conserved complex composed of eight subunits (CSN1-CSN8). Among the CSN subunits, CSN5 and its dimerization partner CSN6 are the only two MPN (Mpr1-Pad1-N-terminal) domain-containing subunits. These two subunits play essential roles in a variety of biological processes, such as cell cycle progression, protein stability and signal transduction. However, their expression patterns and clinical significance in lung cancer are not completely clear...
March 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29684855/post-transcription-mediated-snail-stabilization-is-involved-in-radiation-exposure-induced-invasion-and-migration-of-hepatocarcinoma-cells
#3
Liyang Dong, Xuebang Zhang, Wei Xiang, Junwei Ni, Weizhong Zhou, Haiyan Li
Increasing evidences suggested that radiotherapy can paradoxically promote tumor invasion and metastatic processes, while its detailed mechanism is not well illustrated. Our present study found that radiation can promote the migration and invasion of hepatocellular carcinoma (HCC) cells via induction of epithelial mesenchymal transition (EMT), which was evidenced by the results that radiation induced up regulation of vimentin while down regulation of E-Cadherin. As to the EMT-related transcription factors, radiation increased the expression of Snail, while not Slug, ZEB1 or TWIST...
April 20, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29616013/-csn5-is-required-for-the-conidiogenesis-and-pathogenesis-of-the-alternaria-alternata-tangerine-pathotype
#4
Mingshuang Wang, Xiao Yang, Ruoxin Ruan, Huilan Fu, Hongye Li
The COP9 signalosome (CSN) is a highly conserved protein complex involved in the ubiquitin-proteasome system. Its metalloisopeptidase activity resides in subunit 5 (CSN5). Functions of csn5 in phytopathogenic fungi are poorly understood. Here, we knocked out the csn5 ortholog ( Aacsn5 ) in the tangerine pathotype of Alternaria alternata . The Δ Aacsn5 mutant showed a moderately reduced growth rate compared to the wildtype strain and was unable to produce conidia. The growth of Δ Aacsn5 mutant was not affected in response to oxidative and osmotic stresses...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29596838/csn5-jab1-facilitates-non-small-cell-lung-cancer-cell-growth-through-stabilizing-survivin
#5
Jie Li, Yingjie Li, Bin Wang, Yongfu Ma, Ping Chen
CSN5/JAB1 is a critical subunit of the COP9 signalosome (CSN) and is essentially involved in diverse types of cancer, but little is known about the role of CSN5 in non-small cell lung cancer (NSCLC). In the current study, we found that CSN5 expression was higher in NSCLC tissues compared to the corresponding non-tumor tissues. High CSN5 expression level is closely correlated with tumor progression and poor survival in NSCLC patients. We also found that knockdown of CSN5 remarkably suppressed cell growth by inducing cell cycle arrest and apoptosis promotion in NSCLC cells...
March 26, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29477618/overexpression-of-cops3-promotes-clear-cell-renal-cell-carcinoma-progression-via-regulation-of-phospho-akt-thr308-cyclin-d1-and-caspase-3
#6
Yang Hong, Xiaobo Huang, Lizhe An, Haiyun Ye, Kai Ma, Fengshi Zhang, Qingquan Xu
The third subunit of the COP9 signalosome (COPS3) is associated with cell proliferation and tumorigenesis process in cancer. The present study showed that the expression level of COPS3 was upregulated in malignant cell lines and COPS3 overexpression was related with clinical stage, T stage, historical grade. Kaplan-Meier survival curves showed that COPS3 may function as a prognostic factor for overall survival. CCK-8 and colony formation assays revealed that knockdown of COPS3 in ACHN and 786-O significantly impacted proliferation in vitro...
April 15, 2018: Experimental Cell Research
https://www.readbyqxmd.com/read/29462139/the-cop9-signalosome-regulates-seed-germination-by-facilitating-protein-degradation-of-rgl2-and-abi5
#7
Dan Jin, Ming Wu, Bosheng Li, Birte Bücker, Philipp Keil, Shaoman Zhang, Jigang Li, Dingming Kang, Jie Liu, Jie Dong, Xing Wang Deng, Vivian Irish, Ning Wei
The control of seed germination and seed dormancy are critical for the successful propagation of plant species, and are important agricultural traits. Seed germination is tightly controlled by the balance of gibberellin (GA) and abscisic acid (ABA), and is influenced by environmental factors. The COP9 Signalosome (CSN) is a conserved multi-subunit protein complex that is best known as a regulator of the Cullin-RING family of ubiquitin E3 ligases (CRLs). Multiple viable mutants of the CSN showed poor germination, except for csn5b-1...
February 2018: PLoS Genetics
https://www.readbyqxmd.com/read/29410023/histone-deacetylase-inhibitors-upregulate-snail-via-smad2-3-phosphorylation-and-stabilization-of-snail-to-promote-metastasis-of-hepatoma-cells
#8
Wei Xu, Hao Liu, Zhi-Gang Liu, Hong-Sheng Wang, Fan Zhang, Hao Wang, Ji Zhang, Jing-Jing Chen, Hong-Jun Huang, Yuan Tan, Meng-Ting Cao, Jun Du, Qiu-Gui Zhang, Guan-Min Jiang
Hepatocellular carcinoma (HCC) remains the third most common cause of cancer-related mortality. Resection and transplantation are the only curative treatments available, but are greatly hampered by high recurrence rates. Histone deacetylase inhibitors (HDACIs) are considered to be promising anticancer agents in drug development. Currently, four HDACIs have been granted Food and Drug Administration (FDA) approval for cancer. HDACIs have shown significant efficacy in hematological malignancies. However, they have limited effects in epithelial cell-derived cancers, including HCC, and the mechanisms of these are not elucidated...
April 28, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29360641/cop1-det1-ets-axis-regulates-erk-transcriptome-and-sensitivity-to-mapk-inhibitors
#9
Yuanyuan Xie, Zhen Cao, Elissa Wp Wong, Youxin Guan, Wenfu Ma, Jenny Q Zhang, Edward G Walczak, Devan Murphy, Leili Ran, Inna Sirota, Shangqian Wang, Shipra Shukla, Dong Gao, Simon Rv Knott, Kenneth Chang, Justin Leu, John Wongvipat, Cristina R Antonescu, Gregory Hannon, Ping Chi, Yu Chen
Aberrant activation of MAPK signaling leads to the activation of oncogenic transcriptomes. How MAPK signaling is coupled with the transcriptional response in cancer is not fully understood. In 2 MAPK-activated tumor types, gastrointestinal stromal tumor and melanoma, we found that ETV1 and other Pea3-ETS transcription factors are critical nuclear effectors of MAPK signaling that are regulated through protein stability. Expression of stabilized Pea3-ETS factors can partially rescue the MAPK transcriptome and cell viability after MAPK inhibition...
April 2, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29355077/the-cop9-signalosome-inhibits-cullin-ring-e3-ubiquitin-ligases-independently-of-its-deneddylase-activity
#10
Annabelle Suisse, Miklós Békés, Tony T Huang, Jessica E Treisman
The COP9 signalosome inhibits the activity of Cullin-RING E3 ubiquitin ligases by removing Nedd8 modifications from their Cullin subunits. Neddylation renders these complexes catalytically active, but deneddylation is also necessary for them to exchange adaptor subunits and avoid auto-ubiquitination. Although deneddylation is thought to be the primary function of the COP9 signalosome, additional activities have been ascribed to some of its subunits. We recently showed that COP9 subunits protect the transcriptional repressor and tumor suppressor Capicua from two distinct modes of degradation...
January 22, 2018: Fly
https://www.readbyqxmd.com/read/29339435/corrected-and-republished-from-the-cop9-signalosome-interacts-with-and-regulates-interferon-regulatory-factor-5-protein-stability
#11
Justyna Korczeniewska, Betsy J Barnes
The transcription factor interferon regulatory factor 5 (IRF5) exerts crucial functions in the regulation of host immunity against extracellular pathogens, DNA damage-induced apoptosis, death receptor signaling, and macrophage polarization. Tight regulation of IRF5 is thus warranted for an efficient response to extracellular stressors and for limiting autoimmune and inflammatory responses. Here we report that the COP9 signalosome (CSN), a general modulator of diverse cellular and developmental processes, associates constitutively with IRF5 and promotes its protein stability...
February 1, 2018: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/29286069/a-16-gene-expression-signature-to-distinguish-stage-i-from-stage-ii-lung-squamous-carcinoma
#12
Rui Wang, Yuxing Cai, Baoping Zhang, Zhengxia Wu
The present study aimed to perform screening of a gene signature for the discrimination and prognostic prediction of stage I and II lung squamous carcinoma. A microarray meta‑analysis was performed to identify differentially expressed genes (DEGs) between stage I and II lung squamous carcinoma samples in seven microarray datasets collected from the Gene Expression Omnibus database via the MetaQC and MetaDE package in R. The important DEGs were selected according to the betweenness centrality value of the protein‑protein interaction (PPI) network...
March 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29193661/the-c2h2-zinc-finger-protein-slzf3-regulates-asa-synthesis-and-salt-tolerance-by-interacting-with-csn5b
#13
Ying Li, Zhuannan Chu, Jinying Luo, Yuhong Zhou, Yujing Cai, Yongen Lu, Junhui Xia, Hanhui Kuang, Zhibiao Ye, Bo Ouyang
Abiotic stresses are a major cause of crop loss. Ascorbic acid (AsA) promotes stress tolerance by scavenging reactive oxygen species (ROS), which accumulate when plants experience abiotic stress. Although the biosynthesis and metabolism of AsA are well established, the genes that regulate these pathways remain largely unexplored. Here, we report on a novel regulatory gene from tomato (Solanum lycopersicum) named SlZF3 that encodes a Cys2/His2-type zinc-finger protein with an EAR repression domain. The expression of SlZF3 was rapidly induced by NaCl treatments...
November 28, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/29184036/retraction-for-korczeniewska-and-barnes-the-cop9-signalosome-interacts-with-and-regulates-interferon-regulatory-factor-5-protein-stability
#14
Justyna Korczeniewska, Betsy J Barnes
No abstract text is available yet for this article.
December 15, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/29104227/inter-species-host-gene-expression-differences-in-response-to-human-and-avian-influenza-a-virus-strains
#15
Biruhalem Taye, Dawn Yeo, Raphael Tze Chuen Lee, Boon Huan Tan, Richard J Sugrue, Sebastian Maurer-Stroh
Low pathogenic avian influenza (LPAI) viruses are a source of sporadic human infections and could also contribute to future pandemic outbreaks but little is known about inter-species differences in the host responses to these viruses. Here, we studied host gene expression signatures of cell lines from three species (human, chicken, and canine) in response to six different viruses (H1N1/WSN, H5N2/F59, H5N2/F118, H5N2/F189, H5N3 and H9N2). Comprehensive microarray probe set re-annotation and ortholog mapping of the host genes was necessary to allow comparison over extended functionally annotated gene sets and orthologous pathways...
November 1, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28923850/increasing-the-unneddylated-cullin1-portion-rescues-the-csn-phenotypes-by-stabilizing-adaptor-modules-to-drive-scf-assembly
#16
Qingqing Liu, Yike Zhou, Ruiqi Tang, Xuehong Wang, Qiwen Hu, Ying Wang, Qun He
The dynamic SCF (Skp1-cullin1-F-box protein) assembly is controlled by cycles of cullin neddylation/deneddylation based on the deneddylation activity of the COP9 signalosome (CSN) and global sequestration of cullins by CAND1. However, acceptance of this prediction was hampered by the results of recent studies, and the regulatory mechanism and key players remain to be identified. We found that maintaining a proper Cul1Nedd8 /Cul1 ratio is crucial to ensure SCF functions. Reducing the high Cul1Nedd8 /Cul1 ratios in csn mutants through ectopic expression of the nonneddylatable Cul1K722R proteins or introducing the endogenous cul1 K722R point mutation significantly rescues their defective phenotypes...
December 1, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28919423/cops5-inhibition-arrests-the-proliferation-and-growth-of-serous-ovarian-cancer-cells-via-the-elevation-of-p27-level
#17
Hongqin Zhang, Ailing Zhong, Jiajun Sun, Miaomiao Chen, Suhong Xie, Hui Zheng, Yanchun Wang, Yiwen Yu, Lin Guo, Renquan Lu
The fifth component of the COP9 signalosome complex (COPS5), which plays an essential role in ubiquitin-mediated protein degradation, has been found as a prognostic biomarker for multiple cancers, however, the role of COPS5 in serous ovarian cancer (SOC) remain to be clarified. In this study, we found that COPS5 expression was significantly increased in SOC cells and tissues compared with those controls. Mechanistically, COPS5 and p27was proved to interact with each other, with COPS5 acts as a negative regulator of p27...
November 4, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28891468/epidermal-growth-factor-receptor-neddylation-is-regulated-by-a-desmosomal-cop9-constitutive-photomorphogenesis-9-signalosome-complex
#18
Nicole Ann Najor, Gillian Nicole Fitz, Jennifer Leigh Koetsier, Lisa Marie Godsel, Lauren Veronica Albrecht, Robert Harmon, Kathleen Janee Green
Cell junctions are scaffolds that integrate mechanical and chemical signaling. We previously showed that a desmosomal cadherin promotes keratinocyte differentiation in an adhesion-independent manner by dampening Epidermal Growth Factor Receptor (EGFR) activity. Here we identify a potential mechanism by which desmosomes assist the de-neddylating COP9 signalosome (CSN) in attenuating EGFR through an association between the Cops3 subunit of the CSN and desmosomal components, Desmoglein1 (Dsg1) and Desmoplakin (Dp), to promote epidermal differentiation...
September 11, 2017: ELife
https://www.readbyqxmd.com/read/28869038/the-genomic-landscape-of-human-cellular-circadian-variation-points-to-a-novel-role-for-the-signalosome
#19
Ludmila Gaspar, Cedric Howald, Konstantin Popadin, Bert Maier, Daniel Mauvoisin, Ermanno Moriggi, Maria Gutierrez-Arcelus, Emilie Falconnet, Christelle Borel, Dieter Kunz, Achim Kramer, Frederic Gachon, Emmanouil T Dermitzakis, Stylianos E Antonarakis, Steven A Brown
The importance of natural gene expression variation for human behavior is undisputed, but its impact on circadian physiology remains mostly unexplored. Using umbilical cord fibroblasts, we have determined by genome-wide association how common genetic variation impacts upon cellular circadian function. Gene set enrichment points to differences in protein catabolism as one major source of clock variation in humans. The two most significant alleles regulated expression of COPS7B, a subunit of the COP9 signalosome...
September 4, 2017: ELife
https://www.readbyqxmd.com/read/28861005/murine-myocardial-transcriptome-analysis-reveals-a-critical-role-of-cops8-in-the-gene-expression-of-cullin-ring-ligase-substrate-receptors-and-redox-and-vesicle-trafficking-pathways
#20
Ammara Abdullah, Kathleen M Eyster, Travis Bjordahl, Peng Xiao, Erliang Zeng, Xuejun Wang
Background: The COP9 signalosome (CSN) consisting of 8 unique protein subunits (COPS1 through COPS8) serves as the cullin deneddylase, regulating the catalytic dynamics of cullin RING ligases (CRLs), the largest family of ubiquitin ligases Background: The COP9 signalosome (CSN) consisting of 8 unique protein subunits (COPS1 through COPS8) serves as the cullin deneddylase, regulating the catalytic dynamics of cullin RING ligases (CRLs), the largest family of ubiquitin ligases. Supported primarily by the decrease of substrate receptor (SR) proteins of CRLs in cells deficient of a CSN subunit, CSN-mediated cullin deneddylation is believed to prevent autoubiquitination and self-destruction of the SR in active CRLs...
2017: Frontiers in Physiology
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