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https://www.readbyqxmd.com/read/29782832/nup159-weakens-gle1-binding-to-dbp5-but-does-not-accelerate-adp-release
#1
Emily V Wong, Shawn Gray, Wenxiang Cao, Rachel Montpetit, Ben Montpetit, Enrique M De La Cruz
Dbp5, DDX19 in humans, is an essential DEAD-box protein involved in mRNA export, which has also been linked to other cellular processes, including rRNA export and translation. Dbp5 ATPase activity is regulated by several factors, including RNA, the nucleoporin proteins Nup159 and Gle1, and the endogenous small molecule inositol hexakisphosphate (InsP6 ). To better understand how these factors modulate Dbp5 activity and how this modulation relates to in vivo RNA metabolism, a detailed characterization of the Dbp5 mechanochemical cycle in the presence of those regulators individually or together is necessary...
May 18, 2018: Journal of Molecular Biology
https://www.readbyqxmd.com/read/29769412/imsnc761-and-ddx6-synergistically-suppress-cell-proliferation-and-promote-apoptosis-via-p53-in-testicular-embryonal-carcinoma-cells
#2
Zhengzheng Duan, Ping Ping, Guishuan Wang, Xiansheng Zhang, Fei Sun
Intermediate-size noncoding RNAs (imsncRNAs) have been shown to play important regulatory roles in the development of several eukaryotic organisms. In this research, we selected imsnc761 as a research target. Expression analyses in a previous study showed that imsnc761 was downregulated in maturation-arrested testis tissue compared with the level in normal controls. In this study, we found that imsnc761 could interact with DEAD-box helicase 6 (DDX6) to induce NT2 cell apoptosis and proliferation inhibition via the p53 pathway...
May 16, 2018: Bioscience Reports
https://www.readbyqxmd.com/read/29746542/depletion-of-mrna-export-regulator-dbp5-ddx19-gle1-or-ippk-that-is-a-key-enzyme-for-the-production-of-ip6-resulting-in-differentially-altered-cytoplasmic-mrna-expression-and-specific-cell-defect
#3
Masumi Okamura, Yasutaka Yamanaka, Maki Shigemoto, Yuya Kitadani, Yuhko Kobayashi, Taiho Kambe, Masaya Nagao, Issei Kobayashi, Katsuzumi Okumura, Seiji Masuda
DBP5, also known as DDX19, GLE1 and inositol hexakisphosphate (IP6) function in messenger RNA (mRNA) export at the cytoplasmic surface of the nuclear pore complex in eukaryotic cells. DBP5 is a DEAD-box RNA helicase, and its activity is stimulated by interactions with GLE1 and IP6. In addition, these three factors also have unique role(s). To investigate how these factors influenced the cytoplasmic mRNA expression and cell phenotype change, we performed RNA microarray analysis to detect the effect and function of DBP5, GLE1 and IP6 on the cytoplasmic mRNA expression...
2018: PloS One
https://www.readbyqxmd.com/read/29742983/dead-box-helicases-the-yin-and-yang-roles-in-viral-infections
#4
Vanessa Meier-Stephenson, Tyler Mrozowich, Mimi Pham, Trushar R Patel
Viruses hijack the host cell machinery and recruit host proteins to aid their replication. Several host proteins also play vital roles in inhibiting viral replication. Emerging class of host proteins central to both of these processes are the DEAD-box helicases: a highly conserved family of ATP-dependent RNA helicases, bearing a common D-E-A-D (Asp-Glu-Ala-Asp) motif. They play key roles in numerous cellular processes, including transcription, splicing, miRNA biogenesis and translation. Though their sequences are highly conserved, these helicases have quite diverse roles in the cell...
May 9, 2018: Biotechnology & Genetic Engineering Reviews
https://www.readbyqxmd.com/read/29740493/bioinformatic-analysis-and-prediction-of-the-function-and-regulatory-network-of-long-non-coding-rnas-in-hepatocellular-carcinoma
#5
Ming-Rong Cao, Ze-Ping Han, Ji-Ming Liu, Yu-Guang Li, Yu-Bing Lv, Jia-Bin Zhou, Jin-Hua He
Computational analysis and bioinformatics have significantly advanced the ability of researchers to process and analyze biological data. Molecular data from human and model organisms may facilitate drug target validation and identification of biomarkers with increased predictive accuracy. The aim of the present study was to investigate the function of long non-coding RNAs (lncRNAs) in hepatocellular carcinoma (HCC) using online databases, and to predict their regulatory mechanism. HCC-associated lncRNAs, their downstream transcription factors and microRNAs (miRNAs/miRs), as well as the HCC-associated target genes, were identified using online databases...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29725036/initial-characterisation-of-adult-human-ovarian-cell-populations-isolated-by-ddx4-expression-and-aldehyde-dehydrogenase-activity
#6
Yvonne L Clarkson, Marie McLaughlin, Martin Waterfall, Cheryl E Dunlop, Paul A Skehel, Richard A Anderson, Evelyn E Telfer
The existence of a population of putative stem cells with germline developmental potential (oogonial stem cells: OSCs) in the adult mammalian ovary has been marked by controversy over isolation methodology and potential for in-vitro transformation, particularly where cell sorting has been based on expression of DEAD box polypeptide 4 (DDX4). This study describes a refined tissue dissociation/fluorescence-activated cell sorting (FACS) protocol for the ovaries of adult women which results in increased cell viability and yield of putative OSCs...
May 3, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29685102/identification-of-novel-putative-causative-genes-and-genetic-marker-for-male-sterility-in-japanese-cedar-cryptomeria-japonica-d-don
#7
Kentaro Mishima, Tomonori Hirao, Miyoko Tsubomura, Miho Tamura, Manabu Kurita, Mine Nose, So Hanaoka, Makoto Takahashi, Atsushi Watanabe
BACKGROUND: Japanese cedar (Cryptomeria japonica) is an important tree for Japanese forestry. Male-sterile marker development in Japanese cedar would facilitate selection of male-sterile plus trees, addressing the widespread social problem of pollinosis and facilitating the identification of heterozygotes, which are useful for breeding. RESULTS: This study used next-generation sequencing for single-nucleotide polymorphism discovery in libraries constructed from several organs, including male-sterile and male-fertile strobili...
April 23, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29679569/ddx1-regulates-alternative-splicing-and-insulin-secretion-in-pancreatic-%C3%AE-cells
#8
Wen Zhong, Zonghong Li, Maoge Zhou, Tao Xu, You Wang
DEAD-box helicase 1 (DDX1) is a multifunction protein involved in diverse cellular processes including transcription, viral replication, mRNA/miRNA processing, and tRNA splicing. Here, we report a novel function of DDX1 in mRNA alternative splicing in pancreatic β cells. By performing integrated data analysis of high-throughput RNA sequencing (RNA-Seq), and cross-linking and immunoprecipitation coupled with deep sequencing (CLIP-Seq), we identify hundreds of alternative splicing genes that are targeted by DDX1...
June 7, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29662488/subretinal-injection-of-hy-peptides-induces-systemic-antigen-specific-inhibition-of-effector-cd4-and-cd8-t-cell-responses
#9
Julie Vendomèle, Safa Dehmani, Quentin Khebizi, Anne Galy, Sylvain Fisson
Purpose: Injection of an antigen into the anterior chamber of the eye induces a peripheral antigen-specific immune modulation mechanism, known as anterior chamber-associated immune deviation (ACAID). Delayed-type hypersensitivity experiments argue that the subretinal space (SR) of the eye displays properties similar to ACAID. However, no investigation was performed regarding the differential impact of a subretinal antigen injection on peripheral CD4+ versus CD8+ T cells, on the potential immune deviation regarding Th profiles, and on the antigen-specificity of the inhibition...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29653436/a-chloroplast-targeted-cabbage-dead-box-rna-helicase-brrh22-confers-abiotic-stress-tolerance-to-transgenic-arabidopsis-plants-by-affecting-translation-of-chloroplast-transcripts
#10
Ghazala Nawaz, Kwanuk Lee, Su Jung Park, Yeon-Ok Kim, Hunseung Kang
Although the roles of many DEAD-box RNA helicases (RHs) have been determined in the nucleus as well as in cytoplasm during stress responses, the importance of chloroplast-targeted DEAD-box RHs in stress response remains largely unknown. In this study, we determined the function of BrRH22, a chloroplast-targeted DEAD-box RH in cabbage (Brassica rapa), in abiotic stress responses. The expression of BrRH22 was markedly increased by drought, heat, salt, or cold stress and by ABA treatment, but was largely decreased by UV stress...
April 7, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29642538/ddx5-rna-helicases-emerging-roles-in-viral-infection
#11
REVIEW
Wenyu Cheng, Guohua Chen, Huaijie Jia, Xiaobing He, Zhizhong Jing
Asp-Glu-Ala-Asp (DEAD)-box polypeptide 5 (DDX5), also called p68, is a prototypical member of the large ATP-dependent RNA helicases family and is known to participate in all aspects of RNA metabolism ranging from transcription to translation, RNA decay, and miRNA processing. The roles of DDX5 in cell cycle regulation, tumorigenesis, apoptosis, cancer development, adipogenesis, Wnt-β-catenin signaling, and viral infection have been established. Several RNA viruses have been reported to hijack DDX5 to facilitate various steps of their replication cycles...
April 9, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29622601/dual-role-of-the-rna-helicase-ddx5-in-post-transcriptional-regulation-of-myelin-basic-protein-in-oligodendrocytes
#12
Peter Hoch-Kraft, Robin White, Stefan Tenzer, Eva-Maria Krämer-Albers, Jacqueline Trotter, Constantin Gonsior
In the central nervous system, oligodendroglial expression of Myelin Basic Protein (MBP) is crucial for the assembly and structure of the myelin sheath. MBP synthesis is tightly regulated in space and time, particularly on the post-transcriptional level. We have identified the DEAD-box RNA helicase DDX5 (alias p68) in a complex with Mbp mRNA in oligodendroglial cells. Expression of DDX5 is highest in progenitor cells and immature oligodendrocytes, where it localizes to heterogeneous populations of cytoplasmic ribonucleoprotein (RNP) complexes associated with Mbp mRNA in the cell body and processes...
April 5, 2018: Journal of Cell Science
https://www.readbyqxmd.com/read/29621707/identification-of-cd-responsive-rna-helicase-genes-and-expression-of-a-putative-bnrh-24-mediated-by-mir158-in-canola-brassica-napus
#13
Xian Duo Zhang, Jia Yun Sun, Yuan Yuan You, Jian Bo Song, Zhi Min Yang
RNA helicases play crucial roles in RNA splicing, transport, editing and degradation, protein translation initiation and siRNA-mediated gene silencing. However, knowledge about their functionality in rapeseed (Brassica napus) is rare. In the study, we identified and annotated 271 RNA helicase genes from B. napus using bioinformatics and high-throughput RNA-sequencing (RNA-seq). Three subfamilies DEAD-box, DEAH-box, or DExD/H-box have been identified. One hundred and ninety-five RNA helicases were confirmed by RNA-seq and 49 were identified to differentially respond to cadmium (Cd) stress (> 1...
April 2, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29588407/the-sole-dead-box-rna-helicase-of-the-gastric-pathogen-helicobacter-pylori-is-essential-for-colonization
#14
Lamya El Mortaji, Sylvie Aubert, Eloïse Galtier, Christine Schmitt, Karine Anger, Yulia Redko, Yves Quentin, Hilde De Reuse
Present in every kingdom of life, generally in multiple copies, DEAD-box RNA helicases are specialized enzymes that unwind RNA secondary structures. They play major roles in mRNA decay, ribosome biogenesis, and adaptation to cold temperatures. Most bacteria have multiple DEAD-box helicases that present both specialized and partially redundant functions. By using phylogenomics, we revealed that the Helicobacter genus, including the major gastric pathogen H. pylori , is among the exceptions, as it encodes a sole DEAD-box RNA helicase...
March 27, 2018: MBio
https://www.readbyqxmd.com/read/29584632/inhibition-of-zika-virus-replication-by-silvestrol
#15
Fabian Elgner, Catarina Sabino, Michael Basic, Daniela Ploen, Arnold Grünweller, Eberhard Hildt
The Zika virus (ZIKV) outbreak in 2016 in South America with specific pathogenic outcomes highlighted the need for new antiviral substances with broad-spectrum activities to react quickly to unexpected outbreaks of emerging viral pathogens. Very recently, the natural compound silvestrol isolated from the plant Aglaia foveolata was found to have very potent antiviral effects against the (-)-strand RNA-virus Ebola virus as well as against Corona- and Picornaviruses with a (+)-strand RNA-genome. This antiviral activity is based on the impaired translation of viral RNA by the inhibition of the DEAD-box RNA helicase eukaryotic initiation factor-4A (eIF4A) which is required to unwind structured 5´-untranslated regions (5'-UTRs) of several proto-oncogenes and thereby facilitate their translation...
March 27, 2018: Viruses
https://www.readbyqxmd.com/read/29574779/a-dead-box-rna-helicase-rh8-is-critical-for-regulation-of-aba-signaling-and-the-drought-stress-response-via-inhibition-of-pp2ca-activity
#16
Woonhee Baek, Chae Woo Lim, Sung Chul Lee
Abscisic acid (ABA) is major plant hormone involved in regulating abiotic stress responses. Several studies have established that an ABA-signaling transduction pathway-from ABA perception to response-functions in plant cells. The group A PP2Cs constitute core components of ABA signaling, and they negatively regulate ABA signaling and stress responses. Recent studies have identified and functionally analyzed regulators of PP2C activity; however, the precise regulatory mechanisms remain unclear. In the present study, we used a yeast two-hybrid (Y2H) screening analysis to identify the DEAD-box RNA helicase RH8, which interacted with PP2CA in the nucleus...
March 25, 2018: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29535419/dead-box-helicase-27-promotes-colorectal-cancer-growth-and-metastasis-and-predicts-poor-survival-in-crc-patients
#17
Jieting Tang, Huarong Chen, Chi-Chun Wong, Dabin Liu, Tong Li, Xiaohong Wang, Jiafu Ji, Joseph Jy Sung, Jing-Yuan Fang, Jun Yu
Copy number alterations (CNAs) are crucial for colorectal cancer (CRC) development. In this study, DEAD box polypeptide 27 (DDX27) was identified to be highly amplified in both TCGA CRC (474/615) and primary CRC (47/103), which was positively correlated with its mRNA overexpression. High DDX27 mRNA (N = 199) and protein expression (N = 260) predicted poor survival in CRC patients. Ectopic expression of DDX27 increased CRC cells proliferation, migration and invasion, but suppressed apoptosis. Conversely, silencing of DDX27 exerted opposite effects in vitro and significantly inhibited murine xenograft tumor growth and lung metastasis in vivo...
March 14, 2018: Oncogene
https://www.readbyqxmd.com/read/29523774/the-multiple-lives-of-dead-box-rna-helicase-dp103-ddx20-gemin3
#18
REVIEW
Frank Curmi, Ruben J Cauchi
Gemin3, also known as DDX20 or DP103, is a DEAD-box RNA helicase which is involved in more than one cellular process. Though RNA unwinding has been determined in vitro , it is surprisingly not required for all of its activities in cellular metabolism. Gemin3 is an essential gene, present in Amoeba and Metazoa. The highly conserved N-terminus hosts the helicase core, formed of the helicase- and DEAD-domains, which, based on crystal structure determination, have key roles in RNA binding. The C-terminus of Gemin3 is highly divergent between species and serves as the interaction site for several accessory factors that could recruit Gemin3 to its target substrates and/or modulate its function...
April 17, 2018: Biochemical Society Transactions
https://www.readbyqxmd.com/read/29522752/rna-helicase-ddx5-participates-in-oxldl-induced-macrophage-scavenger-receptor-1-expression-by-suppressing-mrna-degradation
#19
Wenting Zhao, Zhen Wang, Zewei Sun, Yuxian He, Dongdong Jian, Xiaotong Hu, Wang Zhang, Liangrong Zheng
The DEAD box protein DDX5, an ATP-dependent RNA helicase, plays an important role in transcriptional regulation and is associated with solid tumors and leukemia. However, its role in oxLDL-induced lipid uptake in macrophages remains unclear. In this study, we detected the expression of DDX5 mRNA and protein in oxidized low-density lipoprotein (oxLDL)-treated human primary macrophages that were induced from monocytes isolated from human peripheral blood with or without several chemical inhibitors using quantitative real-time PCR (qRT-PCR) or Western blotting...
May 15, 2018: Experimental Cell Research
https://www.readbyqxmd.com/read/29520635/computational-analysis-of-high-risk-snps-in-human-dby-gene-responsible-for-male-infertility-a-functional-and-structural-impact
#20
Mili Nailwal, Jenabhai B Chauhan
BACKGROUND: DEAD-box helicase 3, Y-linked (DBY) is a candidate gene of the AZF region which is involved in spermatogenesis process. Mutations in the DBY gene may disrupt the spermatogenesis and lead to infertility in men. Identification of functionally neutral mutation from the disease-causing mutation is the biggest challenge in human genetic variation analysis. Owing to the importance of DBY in male infertility, functional analysis was carried out to reveal the association between genetic mutation and phenotypic variation through various in silico approaches...
March 8, 2018: Interdisciplinary Sciences, Computational Life Sciences
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