keyword
MENU ▼
Read by QxMD icon Read
search

cullin

keyword
https://www.readbyqxmd.com/read/28315506/cullin-1-regulates-mg63-cell-proliferation-and-metastasis-and-is-a-novel-prognostic-marker-of-osteosarcoma
#1
Qinghua Cheng, Guoyong Yin
BACKGROUND: There is no reliable marker available for early detection, diagnostic confirmation or disease prognosis of osteosarcoma. Cullin-1 (CUL1) is a newly reported tumor-related gene, and we aimed to unravel its role in osteosarcoma. METHODS: We used immunohistochemistry to analyze the correlation between CUL1 expression and clinicopathological variables and patient survival. To evaluate the function of CUL1, a group of 28 osteosarcoma patients were recruited for this study...
December 5, 2016: International Journal of Biological Markers
https://www.readbyqxmd.com/read/28298444/scffbxo17-e3-ligase-modulates-inflammation-by-regulating-proteasomal-degradation-of-glycogen-synthase-kinase-3%C3%AE-in-lung-epithelia
#2
Tomeka Suber, Jianxin Wei, Anastasia M Jacko, Ina Nikolli, Yutong Zhao, Jing Zhao, Rama K Mallampalli
Glycogen synthase kinase-3β (GSK3β) has diverse biological roles including effects on cellular differentiation, migration, and inflammation. GSK3β phosphorylates proteins to generate phosphodegrons necessary for recognition by Skip-1/Cullin-1/F-box (SCF) E3 ubiquitin ligases leading to subsequent proteasomal degradation of these substrates. However, little is known regarding how GSK3β protein stability itself is regulated and how its stability may influence inflammation. Here we show that GSK3β is degraded by the ubiquitin-proteasome pathway in murine lung epithelial (MLE) cells through lysine 183 as an acceptor site for K48 polyubiquitination...
March 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28292928/cockayne-syndrome-b-protein-regulates-recruitment-of-the-elongin-a-ubiquitin-ligase-to-sites-of-dna-damage
#3
Juston C Weems, Brian D Slaughter, Jay R Unruh, Stefan Boeing, Shawn M Hall, Merry B McLaird, Takashi Yasukawa, Teijiro Aso, Jesper Q Svejstrup, Joan W Conaway, Ronald C Conaway
Elongin A performs dual functions as the transcriptionally active subunit of RNA polymerase II (Pol II) elongation factor Elongin and as the substrate recognition subunit of a Cullin-RING E3 ubiquitin ligase that ubiquitylates Pol II in response to DNA damage. Assembly of the Elongin A ubiquitin ligase and its recruitment to sites of DNA damage is a tightly regulated process induced by DNA damaging agents and α-amanitin, a drug that induces Pol II stalling. In this report, we demonstrate (i) that Elongin A and the ubiquitin ligase subunit CUL5 associate in cells with the Cockayne syndrome B (CSB) protein and (ii) that this interaction is also induced by DNA damage agents and α-amanitin...
March 14, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28292897/inhibition-of-atherogenesis-by-the-cop9-signalosome-subunit-5-in-vivo
#4
Yaw Asare, Miriam Ommer, Florence A Azombo, Setareh Alampour-Rajabi, Marieke Sternkopf, Maryam Sanati, Marion J Gijbels, Corinna Schmitz, Dzmitry Sinitski, Pathricia V Tilstam, Hongqi Lue, André Gessner, Denise Lange, Johannes A Schmid, Christian Weber, Martin Dichgans, Joachim Jankowski, Ruggero Pardi, Menno P J de Winther, Heidi Noels, Jürgen Bernhagen
Constitutive photomorphogenesis 9 (COP9) signalosome 5 (CSN5), an isopeptidase that removes neural precursor cell-expressed, developmentally down-regulated 8 (NEDD8) moieties from cullins (thus termed "deNEDDylase") and a subunit of the cullin-RING E3 ligase-regulating COP9 signalosome complex, attenuates proinflammatory NF-κB signaling. We previously showed that CSN5 is up-regulated in human atherosclerotic arteries. Here, we investigated the role of CSN5 in atherogenesis in vivo by using mice with myeloid-specific Csn5 deletion...
March 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28290051/construction-of-a-comprehensive-protein-protein-interaction-map-for-vitiligo-disease-to-identify-key-regulatory-elements-a-systemic-approach
#5
Anvita Gupta Malhotra, Mohit Jha, Sudha Singh, Khushhali M Pandey
Vitiligo is an idiopathic disorder characterized by depigmented patches on the skin due to progressive loss of melanocytes. Several genetic, immunological, and pathophysiological investigations have established vitiligo as a polygenetic disorder with multifactorial etiology. However, no definite model explaining the interplay between these causative factors has been established hitherto. Therefore, we studied the disorder at the system level to identify the key proteins involved by exploring their molecular connectivity in terms of topological parameters...
March 13, 2017: Interdisciplinary Sciences, Computational Life Sciences
https://www.readbyqxmd.com/read/28280036/myeloid-derived-cullin-3-promotes-stat3-phosphorylation-by-inhibiting-ogt-expression-and-protects-against-intestinal-inflammation
#6
Xinghui Li, Zhibin Zhang, Lupeng Li, Wei Gong, Audrey J Lazenby, Benjamin J Swanson, Laura E Herring, John M Asara, Jeffrey D Singer, Haitao Wen
Signal transducer and activator of transcription 3 (STAT3) is a key mediator of intestinal inflammation and tumorigenesis. However, the molecular mechanism that modulates STAT3 phosphorylation and activation is not fully understood. Here, we demonstrate that modification of STAT3 with O-linked β-N-acetylglucosamine (O-GlcNAc) on threonine 717 (T717) negatively regulates its phosphorylation and targets gene expression in macrophages. We further found that cullin 3 (CUL3), a cullin family E3 ubiquitin ligase, down-regulates the expression of the O-GlcNAc transferase (OGT) and inhibits STAT3 O-GlcNAcylation...
March 9, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28271482/cullin-ring-e3-ubiquitin-ligases-bridges-to-destruction
#7
Henry C Nguyen, Wei Wang, Yong Xiong
Ubiquitination is a highly conserved post-translational modification in eukaryotes, well known for targeting proteins for degradation by the 26S proteasome. Proteins destined for proteasomal degradation are selected by E3 ubiquitin ligases. Cullin-RING E3 ubiquitin ligases (CRLs) are the largest superfamily of E3 ubiquitin ligases, with over 400 members known in mammals. These modular complexes are tightly regulated in the cell. In this chapter, we highlight recent structural and biochemical advances shedding light on the assembly and architecture of cullin-RING ligases, their dynamic regulation by a variety of host factors, and their manipulation by viral pathogens and small molecules...
2017: Sub-cellular Biochemistry
https://www.readbyqxmd.com/read/28267577/synthetic-toxic-a%C3%AE-1-42-oligomers-can-assemble-in-different-morphologies
#8
Claude Bobo, Stéphane Chaignepain, Sarah Henry, Hélène Vignaud, Alfred Améadan, Christelle Marchal, Enora Prado, James Doutch, Jean-Marie Schmitter, Corinne Nardin, Sophie Lecomte, Christophe Cullin
BACKGROUND: Alzheimer's disease is the most common neurodegenerative disease associated with aggregation of Aβ peptides. Aβ toxicity is mostly related to the capacity of intermediate oligomers to disrupt membrane integrity. We previously expressed Aβ1-42 in a eukaryotic cellular system and selected synthetic variants on their sole toxicity. The most toxic mutant G37C forms stable oligomers. METHODS: Different biophysical methods (Fluorescence spectroscopy, cross-linking, mass spectrometry (MS), Small Angle X-ray Scattering (SAXS), Atomic Force Microscopy (AFM), Transmission Electron Microscopy (TEM), calcein leakage) were used...
March 3, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28245560/the-regulations-of-deubiquitinase-usp15-and-its-pathophysiological-mechanisms-in-diseases
#9
REVIEW
Chon-Kit Chou, Yu-Ting Chang, Michal Korinek, Yei-Tsung Chen, Ya-Ting Yang, Steve Leu, I-Ling Lin, Chin-Ju Tang, Chien-Chih Chiu
Deubiquitinases (DUBs) play a critical role in ubiquitin-directed signaling by catalytically removing the ubiquitin from substrate proteins. Ubiquitin-specific protease 15 (USP15), a member of the largest subfamily of cysteine protease DUBs, contains two conservative cysteine (Cys) and histidine (His) boxes. USP15 harbors two zinc-binding motifs that are essential for recognition of poly-ubiquitin chains. USP15 is grouped into the same category with USP4 and USP11 due to high degree of homology in an N-terminal region consisting of domains present in ubiquitin-specific proteases (DUSP) domain and ubiquitin-like (UBL) domain...
February 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28238764/cullin-e3-ligase-activity-is-required-for-myoblast-differentiation
#10
Jordan Blondelle, Paige Shapiro, Andrea A Domenighetti, Stephan Lange
The role of cullin E3-ubiquitin ligases for muscle homeostasis is best known during muscle atrophy, as the cullin-1 substrate adaptor atrogin-1 is among the most well-characterized muscle atrogins. We investigated whether cullin activity was also crucial during terminal myoblast differentiation and aggregation of acetylcholine receptors for the establishment of neuromuscular junctions in vitro. The activity of cullin E3-ligases is modulated through post-translational modification with the small ubiquitin-like modifier nedd8...
February 24, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/28229932/csn5-jab1-suppresses-the-wnt-inhibitor-dkk1-in-colorectal-cancer-cells
#11
Sandra Jumpertz, Thomas Hennes, Yaw Asare, Anke K Schütz, Jürgen Bernhagen
The COP9 signalosome (CSN) is a multi-protein complex that is highly conserved in eukaryotes. Due to its regulatory impact on processes such as cell cycle, DNA damage response and apoptosis, the CSN is essential for mammalian cells. One of the best-studied functions of the CSN is the deNEDDylation of cullin-RING ligases (CRLs) via its catalytically active subunit CSN5/JAB1, thereby triggering the degradation of various target proteins. CSN5 was found to be overexpressed in many human cancer entities, including colon adenocarcinoma...
February 14, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28225217/proteomic-analysis-of-the-cullin4b-interactome-using-proximity-dependent-biotinylation-in-living-cells
#12
Hailong Zhang, Shupeng Li, Pingting Liu, Frankie H F Lee, Albert H C Wong, Fang Liu
Cullin 4B (CUL4B) mutations have been implicated in mental retardation and dopamine-related behaviors due to disruptions in their interaction with Cullin-RING E3 ligases (CRLs). Thus, further identification of CUL4B substrates can increase the knowledge of protein homeostasis and illuminate the role of CUL4B in neuropsychiatric disease. However, the transient nature of the coupling between CUL4B and its substrates is difficult to detect in vivo using current approaches, thus hampers efforts to investigate functions of CRLs within unperturbed living systems...
February 22, 2017: Proteomics
https://www.readbyqxmd.com/read/28224653/air-sacculitis-in-three-rhesus-macaques-macaca-mulatta-and-one-japanese-macaque-m-%C3%A2-fuscata
#13
Cassandra O Cullin, Lois M A Colgin, Anne D Lewis
Bacterial infection of the laryngeal air sacs (air sacculitis) is infrequently reported in nonhuman primates, where it leads to chronic respiratory disease. It is particularly uncommon in macaques; however, we report here suppurative air sacculitis with extension to adjacent cervical tissues in three rhesus macaques and one Japanese macaque. Staphylococcus aureus, Streptococcus sp., and an anaerobic bacterium were isolated.
April 2017: Journal of Medical Primatology
https://www.readbyqxmd.com/read/28212551/nrip-dcaf6-stabilizes-the-androgen-receptor-protein-by-displacing-ddb2-from-the-cul4a-ddb1-e3-ligase-complex-in-prostate-cancer
#14
Hsin-Hsiung Chen, Ping Fan, Szu-Wei Chang, Yeou-Ping Tsao, Hsiang-Po Huang, Show-Li Chen
Both nuclear receptor interaction protein (NRIP) and DNA damage binding protein 2 (DDB2) belong to the Cullin 4 (CUL4)-DDB1 binding protein family and are androgen receptor (AR)-interacting proteins. Here, we investigated the expression patterns of the NRIP, DDB2 and AR proteins in human prostate cancer tissues and found that the expression levels of NRIP and AR were higher, but the DDB2 level was lower, in prostate cancer tissues than in non-neoplastic controls, suggesting NRIP as a candidate tumor promoter and DDB2 as a tumor suppressor in prostate cancer...
February 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/28202763/inhibition-of-vpx-mediated-samhd1-and-vpr-mediated-hltf-degradation-by-selective-disruption-of-viral-crl4-dcaf1-e3-ubiquitin-ligase-assembly
#15
Hong Wang, Haoran Guo, Jiaming Su, Yajuan Rui, Wenwen Zheng, Wenying Gao, Wenyan Zhang, Zhaolong Li, Guanchen Liu, Wei Wei, Xiao-Fang Yu
The lentiviral accessory proteins Vpx and Vpr are known to utilize CRL4 (DCAF1) E3 ligase to induce the degradation of the host restriction factor SAMHD1 or transcriptional factor HLTF, respectively. Selective disruption of viral CRL4 (DCAF1) E3 ligase could be a promising antiviral strategy. Recently, we have determined that post-translational modification (neddylation) of Cullin-4 is required for the activation of Vpx-CRL4 (DCAF1) E3 ligase. However, the mechanism of Vpx/Vpr-CRL4 (DCAF1) E3 ligase assembly is still poorly understood...
February 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28181316/an-improved-method-for-purification-and-refolding-of-recombinant-hiv-vif-expressed-in-e-coli
#16
Carlos A Duarte, Mickel Palomino
Virion infectivity factor (Vif) is a 23 KDa protein which protects HIV-1 from deamination of its proviral DNA by APOBEC3G. The active form of Vif is a multimer that interacts simultaneously with CBF-beta, the Elongin B and C subunits, Cullin 5 and APOBEC3G to form a ubiquitin ligase complex targeting the latter for degradation. Vif clearly represents an attractive target for developing novel antiviral drugs for the therapy of HIV/AIDS, and this goal requires a source of well folded, readily available protein...
February 8, 2017: Biotechnology and Applied Biochemistry
https://www.readbyqxmd.com/read/28181263/alterations-of-intrinsic-tongue-muscle-properties-with-aging
#17
Miranda J Cullins, Nadine P Connor
INTRODUCTION: Age-related decline in the intrinsic lingual musculature could contribute to swallowing disorders, yet the effects of age on these muscles is unknown. We hypothesized reduced muscle fiber size and shifts to slower MyHC fiber types with age. METHODS: Intrinsic lingual muscles were sampled from 8 young-adult (9 months) and 8 old (32 months) Fischer 344/Brown Norway rats. Fiber size and MyHC were determined by fluorescent immunohistochemistry. RESULTS: Age was associated with a reduced abundance of rapidly-contracting muscle fibers, and more slowly-contracting fibers...
February 9, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28166272/activation-of-mapk-erk-signaling-by-burkholderia-pseudomallei-cycle-inhibiting-factor-cif
#18
Mei Ying Ng, Mei Wang, Patrick J Casey, Yunn-Hwen Gan, Thilo Hagen
Cycle inhibiting factors (Cifs) are virulence proteins secreted by the type III secretion system of some Gram-negative pathogenic bacteria including Burkholderia pseudomallei. Cif is known to function to deamidate Nedd8, leading to inhibition of Cullin E3 ubiquitin ligases (CRL) and consequently induction of cell cycle arrest. Here we show that Cif can function as a potent activator of MAPK/ERK signaling without significant activation of other signaling pathways downstream of receptor tyrosine kinases. Importantly, we found that the ability of Cif to activate ERK is dependent on its deamidase activity, but independent of Cullin E3 ligase inhibition...
2017: PloS One
https://www.readbyqxmd.com/read/28101194/inhibition-of-nedd8-and-fat10-ligase-activities-through-the-degrading-enzyme-nedd8-ultimate-buster-1-a-potential-anticancer-approach
#19
Ka-Liong Tan, Francesco Pezzella
The capabilities of tumour cells to survive through deregulated cell cycles and evade apoptosis are hallmarks of cancer. The ubiquitin-like proteins (UBL) proteasome system is important in regulating cell cycles via signaling proteins. Deregulation of the proteasomal system can lead to uncontrolled cell proliferation. The Skp, Cullin, F-box containing complex (SCF complex) is the predominant E3 ubiquitin ligase, and has diverse substrates. The ubiquitin ligase activity of the SCF complexes requires the conjugation of neural precursor cell expressed, developmentally down-regulated 8 (NEDD8) to cullin proteins...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28100625/the-ptpn14-tumor-suppressor-is-a-degradation-target-of-human-papillomavirus-e7
#20
Anita Szalmás, Vjekoslav Tomaić, Om Basukala, Paola Massimi, Suruchi Mittal, József Kónya, Lawrence Banks
Activation of signaling pathways ensuring cell growth is essential for the proliferative competence of human papillomavirus (HPV)-infected cells. Tyrosine kinases and phosphatases are key regulators of cellular growth control pathways. A recently identified potential cellular target of HPV E7 is the cytoplasmic protein tyrosine phosphatase PTPN14, which is a potential tumor suppressor and is linked to the control of the Hippo and Wnt/beta-catenin signaling pathways. In this study, we show that the E7 proteins of both high-risk and low-risk mucosal HPV types can interact with PTPN14...
April 1, 2017: Journal of Virology
keyword
keyword
59761
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"