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https://www.readbyqxmd.com/read/29341842/purification-characterization-of-fibrinolytic-protease-from-bacillus-amyloliquefaciens-mcc2606-and-analysis-of-fibrin-degradation-product-by-ms-ms
#1
Yogesh Devaraj, Savita Kumari Rajender, Prakash Motiram Halami
A serine protease with preference for fibrin protein was purified and characterized from B.amyloliquefaciens MCC2606, isolated from dosa batter. The protease was purified using ammonium sulphate precipitation, ion-exchange and gel filtration chromatography. The degradation activity of the protease towards the fibrin was significantly higher compared with other protein substrates in the study. The molecular weight of the CFR15-protease was estimated to be 32 kDa based on SDS-PAGE. The purified enzyme exhibited both fibrinolytic and fibrinogenolytic activity...
January 17, 2018: Preparative Biochemistry & Biotechnology
https://www.readbyqxmd.com/read/29341492/development-of-a-bi-modal-in-situ-crosslinking-method-to-achieve-multi-factor-release-from-electrospun-gelatin
#2
Alysha P Kishan, Taneidra Walker, Nick Sears, Thomas Wilems, Elizabeth M Cosgriff-Hernandez
To better mimic native tissue microenvironments, current efforts have moved beyond single growth factor delivery to more complex multiple growth factor delivery with distinct release profiles. Electrospun gelatin, a widely investigated drug delivery vehicle, requires post-processing crosslinking techniques that generate a mesh with uniform crosslinking density, limiting the ability to deliver multiple factors at different rates. Herein, we describe a method to independently control release of multiple factors from a single electrospun gelatin mesh...
January 17, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29341170/identification-and-characterization-of-a-new-three-component-nicotinic-acid-hydroxylase-nahab1-b2-from-pusillimonas-sp-strain-t2
#3
Mei Yuan, Yanting Zhang, Lingling Zhao, Yun Ma, Qin He, Jian He, Jiguo Qiu
Nicotinic acid (NA) is ubiquitous in nature and its microbial degradation mechanisms are diverse. In this study, Pusillimonas sp. strain T2 was found to be capable of utilizing NA as sole carbon and nitrogen sources. This strain could completely degrade 300 mg L-1 NA within 3.5 h at 30 °C and pH 7.0. And one of the degradation intermediate of NA was identified as 6-hydroxynicotinic acid (6HNA). The draft genome sequences of strain T2 was determined to have a total length of 3.3 M bp and 3,054 proteins were predicted...
January 16, 2018: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/29340650/colocalization-of-galectin-3-with-cd147-is-associated-with-increased-gelatinolytic-activity-in-ulcerating-human-corneas
#4
Andrea Cruzat, Miguel Gonzalez-Andrades, Jérôme Mauris, Dina B AbuSamra, Preethi Chidambaram, Kenneth R Kenyon, James Chodosh, Claes H Dohlman, Pablo Argüeso
Purpose: Galectin-3 is a carbohydrate-binding protein known to promote expression of matrix metalloproteinases, a hallmark of ulceration, through interaction with the extracellular matrix metalloproteinase inducer CD147. The aim of this study was to investigate the distribution of galectin-3 in corneas of patients with ulcerative keratitis and to determine its relationship to CD147 and the presence of gelatinolytic activity. Methods: This was an observational case series involving donor tissue from 13 patients with active corneal ulceration and 6 control corneas...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29340073/ym155-exerts-potent-cytotoxic-activity-against-quiescent-g0-g1-multiple-myeloma-and-bortezomib-resistant-cells-via-inhibition-of-survivin-and-mcl-1
#5
Miyuki Ookura, Tatsuya Fujii, Hideki Yagi, Takuya Ogawa, Shinji Kishi, Naoko Hosono, Hiroko Shigemi, Takahiro Yamauchi, Takanori Ueda, Akira Yoshida
YM155, a novel small molecule inhibitor of survivin, shows broad anticancer activity. Here, we have focused on the cytotoxic activity of YM155 against multiple myeloma (MM) including cytokinetically quiescent (G0/G1) cells and bortezomib resistant cells. YM155 strongly inhibited the growth of MM cell lines with the IC50 value of below 10 nM. YM155 also showed potent anti-myeloma activity in mouse xenograft model. YM155 suppressed the expression of survivin and rapidly directed Mcl-1 protein for proteasome degradation...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29339803/carbohydrates-protect-protein-against-abiotic-fragmentation-by-soil-minerals
#6
Patrick N Reardon, Eric D Walter, Carrie L Marean-Reardon, Chad W Lawrence, Markus Kleber, Nancy M Washton
The degradation and turnover of soil organic matter is an important part of global carbon cycling and of particular importance with respect to attempts to predict the response of ecosystems to global climate change. Thus, it is important to mechanistically understand the processes by which organic matter can be degraded in the soil environment, including contact with reactive or catalytic mineral surfaces. We have characterized the outcome of the interaction of two minerals, birnessite and kaolinite, with two disaccharides, cellobiose and trehalose...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29339732/glyburide-and-retinoic-acid-synergize-to-promote-wound-healing-by-anti-inflammation-and-rip140-degradation
#7
Yi-Wei Lin, Pu-Ste Liu, Kasey Ah Pook, Li-Na Wei
Chronic inflammation underlies the development of metabolic diseases and individuals with metabolic disease often also suffer from delayed wound healing due to prolonged inflammation. Resolving inflammation provides a therapeutic strategy in treating metabolic diseases. We previously showed that during an anti-inflammatory response when macrophages were alternatively (M2) polarized, retinoic acid (RA) dramatically activated arginase 1 gene (Arg1), a gene crucial for wound healing. Here we report that a widely used sulfonylurea drug for type 2 diabetes mellitus (T2DM), glyburide, enhances the anti-inflammatory response and synergizes with RA to promote wound healing...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29339538/e6-protein-expressed-by-high-risk-hpv-activates-super-enhancers-of-the-egfr-and-c-met-oncogenes-by-destabilizing-the-histone-demethylase-kdm5c
#8
Xiaohua Chen, Jun Xian Loo, Xin Shi, Wenjun Xiong, Yong Guo, Haiqiang Ke, Mingkun Yang, Yanping Jiang, Siyu Xia, Min Zhao, Shan Zhong, ChunJiang He, Li Fu, Feng Li
The high-risk (HR) human papillomaviruses (HPV) are causative agents of anogenital tract dysplasia and cancers and a fraction of head and neck cancers. The HR HPV E6 oncoprotein possesses canonical oncogenic functions, such as p53 degradation and telomerase activation. It is also capable of stimulating expression of several oncogenes, but the molecular mechanism underlying these events are poorly understood. Here we provide evidence that HPV16 E6 physically interacts with histone H3K4 demethylase KDM5C, resulting in its degradation in an E3 ligase E6AP- and proteasome-dependent manner...
January 16, 2018: Cancer Research
https://www.readbyqxmd.com/read/29339435/corrected-and-republished-from-the-cop9-signalosome-interacts-with-and-regulates-interferon-regulatory-factor-5-protein-stability
#9
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/29339380/negative-regulation-of-the-keap1-nrf2-pathway-by-a-p62-sqstm1-splicing-variant
#10
Shun Kageyama, Tetsuya Saito, Miki Obata, Ryo-Hei Koide, Yoshinobu Ichimura, Masaaki Komatsu
A key anti-oxidant pathway, the Keap1-Nrf2 system, is regulated by p62/Sqstm1 via multiple mechanisms, including gene expression, post-translational modifications such as ubiquitination and phosphorylation, and autophagic degradation of p62/Sqstm1 and Keap1. Herein, we demonstrate a novel mode of regulation of the Keap1-Nrf2 system, mediated by a splicing variant of p62/Sqstm1 pre-mRNA. Ensembl database search and subsequent biochemical analyses in mice revealed the presence of an mRNA that encodes p62/Sqstm1 protein lacking the Keap1-interacting region (KIR), which is essential for the interaction with Keap1...
January 16, 2018: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/29339148/biochemical-characterization-of-campylobacter-jejuni-pnpase-an-exoribonuclease-important-for-bacterial-pathogenicity
#11
Jorge Casinhas, Rute G Matos, Nabila Haddad, Cecília M Arraiano
Bacteria need to promptly respond to environmental changes. Ribonucleases (RNases) are key factors in the adaptation to new environments by enabling a rapid adjustment in RNA levels. The exoribonuclease polynucleotide phosphorylase (PNPase) is essential for low-temperature cell survival, affects the synthesis of proteins involved in virulence and has an important role in swimming, cell adhesion/invasion ability, and chick colonization in C. jejuni. However, the mechanism of action of this ribonuclease is not yet known...
January 12, 2018: Biochimie
https://www.readbyqxmd.com/read/29339145/ocular-delivery-of-proteins-and-peptides-challenges-and-novel-formulation-approaches
#12
Abhirup Mandal, Dhananjay Pal, Vibhuti Agrahari, Hoang My Trinh, Mary Joseph, Ashim K Mitra
The impact of proteins and peptides on the treatment of various conditions including ocular diseases over the past few decades has been advanced by substantial breakthroughs in structural biochemistry, genetic engineering, formulation and delivery approaches. Formulation and delivery of proteins and peptides, such as monoclonal antibodies, aptamers, recombinant proteins and peptides to ocular tissues poses significant challenges owing to their large size, poor permeation and susceptibility to degradation. A wide range of advanced drug delivery systems including polymeric controlled release systems, cell-based delivery and nanowafers are being exploited to overcome the challenges of frequent administration to ocular tissues...
January 12, 2018: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29339024/nrf2-are-pathway-attenuates-oxidative-and-apoptotic-response-in-human-osteoarthritis-chondrocytes-by-activating-erk1-2-elk1-p70s6k-p90rsk-signaling-axis
#13
Nazir M Khan, Imran Ahmad, Tariq M Haqqi
Nrf2, a redox regulated transcription factor, has recently been shown to play a role in cartilage integrity but the mechanism remains largely unknown. Osteoarthritis (OA) is a multifactorial disease in which focal degradation of cartilage occurs. Here, we studied whether Nrf2 exerts chondroprotective effects by suppressing the oxidative stress and apoptosis in IL-1β stimulated human OA chondrocytes. Expression of Nrf2 and its target genes HO-1, NQO1 and SOD2 was significantly high in OA cartilage compared to normal cartilage and was also higher in damaged area compared to smooth area of OA cartilage of the same patient...
January 12, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29338841/the-starch-utilization-system-assembles-around-stationary-starch-binding-proteins
#14
Hannah H Tuson, Matthew H Foley, Nicole M Koropatkin, Julie S Biteen
Bacteroides thetaiotaomicron (Bt) is a prominent member of the human gut microbiota with an extensive capacity for glycan harvest. This bacterium expresses a five-protein complex in the outer membrane, called the starch utilization system (Sus), which binds, degrades, and imports starch into the cell. Sus is a model system for the many glycan-targeting polysaccharide utilization loci found in Bt and other members of the Bacteroidetes phylum. Our previous work has shown that SusG, a lipidated amylase in the outer membrane, explores the entire cell surface but diffuses more slowly as it interacts with starch...
January 12, 2018: Biophysical Journal
https://www.readbyqxmd.com/read/29338056/context-dependent-autoprocessing-of-human-immunodeficiency-virus-type-1-protease-precursors
#15
ChihFeng Tien, Liangqun Huang, Susan M Watanabe, Jordan T Speidel, Carol A Carter, Chaoping Chen
HIV-1 protease autoprocessing is responsible for liberation of free mature protease (PR) from the Gag-Pol polyprotein precursor. A cell-based model system was previously developed to examine the autoprocessing mechanism of fusion precursors carrying the p6*-PR miniprecursor sandwiched between various proteins or epitopes. We here report that precursor autoprocessing is context-dependent as its activity and outcomes can be modulated by sequences upstream of p6*-PR. This was exemplified by the 26aa maltose binding protein (MBP) signal peptide (SigP) when placed at the N-terminus of a fusion precursor...
2018: PloS One
https://www.readbyqxmd.com/read/29337987/identification-of-a-noncanonical-function-for-ribose-5-phosphate-isomerase-a-promotes-colorectal-cancer-formation-by-stabilizing-and-activating-%C3%AE-catenin-via-a-novel-c-terminal-domain
#16
Yu-Ting Chou, Jeng-Kai Jiang, Muh-Hwa Yang, Jeng-Wei Lu, Hua-Kuo Lin, Horng-Dar Wang, Chiou-Hwa Yuh
Altered metabolism is one of the hallmarks of cancers. Deregulation of ribose-5-phosphate isomerase A (RPIA) in the pentose phosphate pathway (PPP) is known to promote tumorigenesis in liver, lung, and breast tissues. Yet, the molecular mechanism of RPIA-mediated colorectal cancer (CRC) is unknown. Our study demonstrates a noncanonical function of RPIA in CRC. Data from the mRNAs of 80 patients' CRC tissues and paired nontumor tissues and protein levels, as well as a CRC tissue array, indicate RPIA is significantly elevated in CRC...
January 16, 2018: PLoS Biology
https://www.readbyqxmd.com/read/29337437/canonical-signaling-and-nuclear-activity-of-mtor-a-teamwork-effort-to-regulate-metabolism-and-cell-growth
#17
REVIEW
Vincent Giguère
Mechanistic (or mammalian) target of rapamycin (mTOR) is a kinase that regulates almost all functions related to cell growth and metabolism in response to extra- and intracellular stimuli such as availability of nutrients, presence of growth factors or the energy status of the cell. As part of two distinct protein complexes, mTORC1 and mTORC2, the kinase has been shown to influence cell growth and proliferation by controlling ribosome biogenesis, mRNA translation, carbohydrate and lipid metabolism, protein degradation, autophagy as well as microtubule and actin dynamics...
January 16, 2018: FEBS Journal
https://www.readbyqxmd.com/read/29337429/co-expression-of-orfcma-with-phb-depolymerase-phazcma-in-escherichia-coli-induces-efficient-whole-cell-biodegradation-of-polyesters
#18
Ming-Chieh Lee, En-Jung Liu, Cheng-Han Yang, Li-Jung Hsiao, Tzong-Ming Wu, Si-Yu Li
Whole-cell degradation of polyesters not only avoids the tedious process of enzyme separation, but also allows the degraded product to be reused as a carbon source. In this study, Escherichia coli BL21(DE3) harboring phaZCma , a gene encoding poly(3-hydroxybutyrate) (PHB) depolymerase from Caldimonas manganoxidans, was constructed. The extra-cellular fraction of E. coli/pPHAZ exhibited a fast PHB degradation rate where it only took 35 h to completely degrade PHB films, while C. manganoxidans took 81 h to do the same...
January 16, 2018: Biotechnology Journal
https://www.readbyqxmd.com/read/29337221/venom-characterization-of-the-amazonian-scorpion-tityus-metuendus
#19
C V F Batista, J G Martins, R Restano-Cassulini, F I V Coronas, F Z Zamudio, R Procópio, L D Possani
The soluble venom from the scorpion Tityus metuendus was characterized by various methods. In vivo experiments with mice showed that it is lethal. Extended electrophysiological recordings using seven sub-types of human voltage gated sodium channels (hNav1.1 to 1.7) showed that it contains both α- and β-scorpion toxin types. Fingerprint analysis by mass spectrometry identified over 200 distinct molecular mass components. At least 60 sub-fractions were recovered from HPLC separation. Five purified peptides were sequenced by Edman degradation, and their complete primary structures were determined...
January 11, 2018: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29337107/trna-derived-small-non-coding-rnas-in-human-disease
#20
Lei Zhu, Xuesha Liu, Wencheng Pu, Yong Peng
Besides attending protein synthesis, transfer RNA (tRNA) is an important regulatory non-coding RNA (ncRNA) that participates in various cellular processes, including cellular metabolism and cell death. Fragments generated from pre- or mature tRNAs by specific endonucleases cleavage (tRNA-derived small non-coding RNA [tsncRNAs]), rather than random degradation products, are newly defined functional small non-coding RNAs (sncRNAs). They can be regulated in bacteria, yeast, plants and animals to respond to stress conditions, resulting in regulation of gene expressions at both transcriptional and post-transcriptional level...
January 11, 2018: Cancer Letters
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