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https://www.readbyqxmd.com/read/28644885/organic-anion-transporting-polypeptide-1b3-can-form-homo-and-hetero-oligomers
#1
Yuchen Zhang, Kelli H Boxberger, Bruno Hagenbuch
OATP1B3 is a 12 transmembrane domain protein expressed at the basolateral membrane of human hepatocytes where it mediates the uptake of numerous drugs and endogenous compounds. Previous western blot results suggest the formation of OATP1B3 multimers. In order to better understand the function of OATP1B3 under normal physiological conditions, we investigated its oligomerization status. We transiently transfected OATP1B3 with a C-terminal His-, FLAG- or HA-tag in HEK293 cells and used co-immunoprecipitation and a Proximity Ligation Assay to detect interactions between the different constructs...
2017: PloS One
https://www.readbyqxmd.com/read/28642170/lncrna-dancr-promotes-tumor-progression-and-cancer-stemness-features-in-osteosarcoma-by-upregulating-axl-via-mir-33a-5p-inhibition
#2
Nian Jiang, Xuedi Wang, Xianbiao Xie, Yan Liao, Ni Liu, Junfeng Liu, Nabo Miao, Jingnan Shen, Tingsheng Peng
lncRNAs regulate the initiation and progression of osteosarcoma, although the mechanism by which this occurs remains unknown. The present study shows that over-expression of the lncRNA DANCR increased osteosarcoma cell proliferation, migration, and invasion in vitro, as well as promoted xenograft tumor growth and lung metastasis in vivo. Mechanistically, DANCR promoted osteosarcoma progression by mediating cancer stem cells (CSC) features. Moreover, pull-down assays and luciferase reporter assays indicated that DANCR upregulated expression of the receptor tyrosine kinase AXL by competitively binding to miR-33a-5p...
June 19, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28637831/oshad1-a-haloacid-dehalogenase-like-apase-enhances-phosphate-accumulation
#3
Bipin Kumar Pandey, Poonam Mehra, Lokesh Verma, Jyoti Bhadouria, Jitender Giri
Phosphorus (P) deficiency limits plant growth and crop yield. Since, plants can absorb only inorganic form of P (Pi), a large portion of soil P (organic and inorganic P complexes) remains largely unused. Here, we identified and characterized a PHR2 regulated; novel low Pi responsive haloacid dehalogenase (HAD)-like hydrolase, OsHAD1. While, OsHAD1 is a functional HAD protein having both acid phosphatase and phytase activity; it showed little homology with other known low Pi responsive HAD superfamily members...
June 21, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28637474/arsenic-trioxide-inhibits-ebv-reactivation-and-promotes-cell-death-in-ebv-positive-lymphoma-cells
#4
Qinyan Yin, Mark Sides, Christopher H Parsons, Erik K Flemington, Joseph A Lasky
BACKGROUND: Epstein-Barr Virus (EBV) is associated with hematopoietic malignancies, such as Burkitt's lymphoma, post-transplantation lymphoproliferative disorder, and diffuse large B-cell lymphoma. The current approach for EBV-associated lymphoma involves chemotherapy to eradicate cancer cells, however, normal cells may be injured and organ dysfunction may occur with currently employed regimens. This research is focused on employing arsenic trioxide (ATO) as EBV-specific cancer therapy takes advantage of the fact the EBV resides within the malignant cells...
June 21, 2017: Virology Journal
https://www.readbyqxmd.com/read/28637172/identification-of-four-type-ii-toxin-antitoxin-systems-in-actinobacillus-pleuropneumoniae
#5
Chengkun Zheng, Xigong Zhao, Ting Zeng, Manman Cao, Jiali Xu, Guolin Shi, Jinquan Li, Huanchun Chen, Weicheng Bei
Toxin-antitoxin systems are small genetic elements that are widely prevalent in the genomes of bacteria and archaea. These modules have been identified in various bacteria and proposed to play an important role in bacterial physiology and virulence. However, their presence in the genomes of Actinobacillus species has received no attention. In this study, we describe the identification of four type II TA systems in Actinobacillus pleuropneumoniae, the causative agent of porcine pleuropneumonia. Reverse transcription PCR analysis revealed that the genes encoding the toxin and antitoxin are co-transcribed...
June 20, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28625920/c-terminal-tail-of-nadph-oxidase-organizer-1-noxo1-mediates-interaction-with-nadph-oxidase-activator-noxa1-in-the-nox1-complex
#6
Pravesh Shrestha, Ji-Hye Yun, Yoon-Joo Ko, Myeongkyu Kim, Yun Soo Bae, Weontae Lee
NOX1 (NADPH oxidase) similar to phagocyte NADPH oxidase, is expressed mainly in the colon epithelium and it is responsible for host defense against microbial infections by generating ROS (reactive oxygen species). NOX1 is activated by two regulatory cytosolic proteins that form a hetero-dimer, Noxo1 (NOX organizer 1) and Noxa1 (NOX activator 1). The interaction between Noxa1 and Noxo1 is critical for activating NOX1. However no structural studies for interaction between Noxa1 and Noxo1 has not been reported till date...
June 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28625841/identification-of-a-new-subtilisin-like-protease-nbslp2-interacting-with-cytoskeletal-protein-septin-in-microsporidia-nosema-bombycis
#7
Fangyan Liu, Qiang Ma, Xiaoqun Dang, Ying Wang, Yue Song, Xianzhi Meng, Jialing Bao, Jie Chen, Guoqing Pan, Zeyang Zhou
Nosema bombycis is the pathogen of pébrine which brings heavy losses to sericulture every year. As a member of serine proteases, subtilisin-like protease (SLP) is related to the pathogenicity in fungi. In this study, we characterized a novel 63.8 kDa subtilisin-like protease NbSLP2 with a predicted transmembrane domain from Microsporidia, N. bombycis. RT-PCR showed that the transcript of NbSLP2 was detected from third day post infection. Immunofluorescence assay (IFA) indicated that NbSLP2 mainly scattered around the spore wall of N...
June 15, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28623657/aptamer-magnetic-bead-quantum-dot-sandwich-assays-for-foodborne-pathogen-detection-pros-cons-and-lessons-learned
#8
John G Bruno, Jeffrey C Sivils, Taylor Phillips
DNA and RNA aptamers have been extensively investigated as potential competitors for antibodies for a variety of applications including food safety testing. Ultrasensitive fluorescence detection of foodborne pathogenic bacteria as low as 1-10 cells/mL has been achieved using aptamers coupled to quantum dots in clear pristine buffers for environmental sample detection. Quantum dots offer other advantages, including single UV or blue light source multiplex (multicolored) detection. However, quantum dots can exhibit decreased fluorescence in some food matrixes and even completely fail to fluoresce in some fatty matrixes, as documented in this report...
June 16, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28621470/the-pou-homeodomain-transcription-factor-poum2-and-broad-complex-isoform-2-transcription-factor-induced-by-20-hydroxyecdysone-collaboratively-regulate-vitellogenin-gene-expression-and-egg-formation-in-the-silkworm-bombyx-mori
#9
Y Lin, H Liu, C Yang, J Gu, G Shen, H Zhang, E Chen, C Han, Y Zhang, Y Xu, J Wu, Q Xia
Vitellogenin (Vg) is a source of nutrition for embryo development. Our previous study showed that the silkworm (Bombyx mori) transcription factor broad complex isoform 2 (BmBrC-Z2) regulates gene expression of the Vg gene (BmVg) by induction with 20-hydroxyecdysone (20E). However, the mechanism by which 20E regulates BmVg expression was not clarified. In this study, cell transfection experiments showed that the BmVg promoter containing the POU homeodomain transcription factor POUM2 (POUM2) and BrC-Z2 cis-response elements (CREs) showed a more significant response to 20E than that harbouring only the BrC-Z2 or POUM2 CRE...
June 16, 2017: Insect Molecular Biology
https://www.readbyqxmd.com/read/28620713/angiopoietin-receptor-tek-interacts-with-cyp1b1-in-primary-congenital-glaucoma
#10
Meha Kabra, Wei Zhang, Sonika Rathi, Anil K Mandal, Sirisha Senthil, Goutham Pyatla, Muralidhar Ramappa, Seema Banerjee, Konegari Shekhar, Srinivas Marmamula, Asha L Mettla, Inderjeet Kaur, Rohit C Khanna, Hemant Khanna, Subhabrata Chakrabarti
Primary congenital glaucoma (PCG) is a severe autosomal recessive ocular disorder associated with considerable clinical and genetic heterogeneity. Recently, rare heterozygous alleles in the angiopoietin receptor-encoding gene TEK were implicated in PCG. We undertook this study to ascertain the second mutant allele in a large cohort (n = 337) of autosomal recessive PCG cases that carried heterozygous TEK mutations. Our investigations revealed 12 rare heterozygous missense mutations in TEK by targeted sequencing...
June 15, 2017: Human Genetics
https://www.readbyqxmd.com/read/28613835/%C3%AE-actinin-promotes-surface-localization-and-current-density-of-the-ca-2-channel-cav1-2-by-binding-to-the-iq-region-of-the-%C3%AE-1-subunit
#11
Pang-Yen Tseng, Peter Henderson, Anne C Hergarden, Tommaso Patriarchi, Andrea M Coleman, Mark W Lillya, Carlota Montagut-Bordas, Boram Lee, Johannes W Hell, Mary C Horne
The voltage-gated L-type Ca(2+) channel CaV1.2 is crucial for initiating heartbeat and control of a number of neuronal functions such as neuronal excitability and long-term potentiation. Mutations of CaV1.2 subunits result in serious health problems including arrhythmia, autism spectrum disorders, immunodeficiency, and hypoglycemia. Thus precise control of CaV1.2 surface expression and localization is essential. We previously reported that α-actinin associates and colocalizes with neuronal CaV1.2 channels and that shRNA-mediated depletion of α-actinin significantly reduces localization of endogenous CaV1...
June 14, 2017: Biochemistry
https://www.readbyqxmd.com/read/28613140/influenza-virus-protein-pb1-f2-interacts-with-calcoco2-ndp52-to-modulate-innate-immune-response
#12
Olivier Leymarie, Léa Meyer, Lionel Tafforeau, Vincent Lotteau, Bruno Da Costa, Bernard Delmas, Christophe Chevalier, Ronan Le Goffic
PB1-F2 is a viral protein encoded by influenza A viruses (IAVs). PB1-F2 is implicated in virulence by triggering immune cell apoptosis and enhancing inflammation. To obtain an insight into the molecular mechanisms of PB1-F2-mediated virulence, we used the yeast two-hybrid approach to find new PB1-F2 cellular interactors. This allowed us to identify calcium-binding and coiled-coil domain 2 (CALCOCO2, also known as NDP52) as a binding partner of PB1-F2. Binding of PB1-F2 to CALCOCO2 was confirmed by pull-down...
June 14, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28607410/dc-sign-and-toll-like-receptor-4-mediate-oxidized-low-density-lipoprotein-induced-inflammatory-responses-in-macrophages
#13
Ke Yang, Xinhe Liu, Yan Liu, Xinqiong Wang, Lijuan Cao, Xiaojie Zhang, Chundi Xu, Weifeng Shen, Tong Zhou
The regulation of inflammatory responses by innate immune receptors is recognized as a crucial step in the development of atherosclerosis, although the precise molecular mechanisms remain to be elucidated. This study focused on illustrating the roles of dendritic cell-specific intercellular adhesion molecule-3-grabbing non-integrin (DC-SIGN)- and Toll-like receptor 4 (TLR4)-regulated inflammatory responses in macrophages. We found that DC-SIGN expression levels were increased in macrophages of atherosclerotic plaques...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28602400/novel-protein-interactions-with-an-actin-homolog-mreb-of-helicobacter-pylori-determined-by-bacterial-two-hybrid-system
#14
Reyna Cristina Zepeda Gurrola, Yajuan Fu, Isabel Cristina Rodríguez Luna, Claudia Guadalupe Benítez Cardoza, María de Jesús López López, Yolanda López Vidal, Germán Rubén Aguilar Gutíerrez, Mario A Rodríguez Pérez, Xianwu Guo
The bacterium Helicobacter pylori infects more than 50% of the world population and causes several gastroduodenal diseases, including gastric cancer. Nevertheless, we still need to explore some protein interactions that may be involved in pathogenesis. MreB, an actin homolog, showed some special characteristics in previous studies, indicating that it could have different functions. Protein functions could be realized via protein-protein interactions. In the present study, the MreB protein from H. pylori 26695 fused with two tags 10×His and GST in tandem was overexpressed and purified from Escherchia coli...
August 2017: Microbiological Research
https://www.readbyqxmd.com/read/28599655/canine-reic-dkk-3-interacts-with-sgta-and-restores-androgen-receptor-signalling-in-androgen-independent-prostate-cancer-cell-lines
#15
Yuiko Kato, Kazuhiko Ochiai, Shota Kawakami, Nobuhiro Nakao, Daigo Azakami, Makoto Bonkobara, Masaki Michishita, Masami Morimatsu, Masami Watanabe, Toshinori Omi
BACKGROUND: The pathological condition of canine prostate cancer resembles that of human androgen-independent prostate cancer. Both canine and human androgen receptor (AR) signalling are inhibited by overexpression of the dimerized co-chaperone small glutamine-rich tetratricopeptide repeat-containing protein α (SGTA), which is considered to cause the development of androgen-independency. Reduced expression in immortalised cells (REIC/Dkk-3) interferes with SGTA dimerization and rescues AR signalling...
June 9, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28579431/direct-interaction-between-selenoprotein-r-and-a%C3%AE-42
#16
Chao Wang, Ping Chen, Xiaohong He, Zaisheng Peng, Siqiang Chen, Renli Zhang, Jinquan Cheng, Qiong Liu
Amyloid-β (Aβ) peptides have taken a central role in AD research, the aggregation of Aβ peptide is involved in the progression of Alzheimer's disease (AD). The 35th amino acid was methionine (Met) in Aβ peptides and it's redox state is critical in determining the biological activity of Aβ. It has been suggested that oxidation of Met(35) (Met(35)O) plays a key role in the formation of paranuclei and in the control of oligomerization pathway choice. As an antioxidative selenoenzyme, Selenoprotein R (SelR) plays important roles in reducing the R-form of MetO to Met to maintain intracellular redox balance...
June 1, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28575494/golgi-phosphoprotein-3-promotes-glioma-progression-via-inhibiting-rab5-mediated-endocytosis-and-degradation-of-epidermal-growth-factor-receptor
#17
Xiuping Zhou, Shao Xie, Shishuang Wu, Yanhua Qi, Zhaohao Wang, Hao Zhang, Dong Lu, Xu Wang, Yu Dong, Guanzheng Liu, Dongxu Yang, Qiong Shi, Wenbin Bian, Rutong Yu
Background.: Golgi phosphoprotein 3 (GOLPH3) is associated with worse prognosis of gliomas, but its role and mechanism in glioma progression remain largely unknown. This study aimed to explore the role and mechanism of GOLPH3 in glioma progression. Methods.: The expression of GOLPH3 in glioma tissues was detected by quantitative PCR, immunoblotting, and immunohistochemistry. GOLPH3's effect on glioma progression was examined using cell growth assays and intracranial glioma model...
June 1, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28567652/pull-down-assay-to-characterize-ca-2-calmodulin-binding-to-plant-receptor-kinases
#18
Christine Kaufmann, Margret Sauter
Plant receptor-like kinases (RLKs) are regulated by posttranscriptional modification and by interaction with regulatory proteins. A common modification of RLKs is (auto)phosphorylation, and a common regulatory protein is the calcium sensor calmodulin (CaM). We have developed protocols to detect the interaction of an RLK with CaM. The interaction with CaM was shown by bimolecular fluorescence complementation (BiFC) (see Chapter 14) and pull-down assay (this chapter). Both methods offer unique advantages. BiFC is useful in showing interaction of soluble as well as of membrane-bound proteins in planta...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28567651/bifc-assay-to-detect-calmodulin-binding-to-plant-receptor-kinases
#19
Cornelia Fischer, Margret Sauter, Petra Dietrich
Plant receptor-like kinases (RLKs) are regulated at various levels including posttranscriptional modification and interaction with regulatory proteins. Calmodulin (CaM) is a calcium-sensing protein that was shown to bind to some RLKs such as the PHYTOSULFOKINE RECEPTOR1 (PSKR1). The CaM-binding site is embedded in subdomain VIa of the kinase domain. It is possible that many more of RLKs interact with CaM than previously described. To unequivocally confirm CaM binding, several methods exist. Bimolecular fluorescence complementation (BiFC) and pull-down assays have been successfully used to study CaM binding to PSKR1 and are described in this chapter (BiFC) and in Chapter 15 (pull down)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28566373/vimentin-modulates-infectious-internalisation-of-hpv16-pseudovirions
#20
Georgia Schäfer, Lisa M Graham, Dirk Lang, Melissa J Blumenthal, Martina Bergant Marušič, Arieh A Katz
Human papillomavirus (HPV) is the most common viral infection of the reproductive tract, with virtually all cases of cervical cancer being attributable to infection by oncogenic HPVs. However, the exact mechanism and receptors used by HPV to infect epithelial cells is controversial. The current entry model suggests that HPV initially attaches to heparan sulfate proteoglycans (HSPGs) at the cell surface, followed by conformational changes, cleavage by furin convertase and subsequent transfer of the virus to an as yet unidentified high-affinity receptor...
May 31, 2017: Journal of Virology
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