keyword
MENU ▼
Read by QxMD icon Read
search

protease

keyword
https://www.readbyqxmd.com/read/28727070/short-term-heat-stress-causes-altered-intracellular-signaling-in-oxidative-skeletal-muscle
#1
S Ganesan, C M Summers, S C Pearce, N K Gabler, R J Valentine, L H Baumgard, R P Rhoads, J T Selsby
Heat stress (HS) causes morbidities and mortalities, in part by inducing organ-specific injury and dysfunction. Further, HS markedly reduces farm animal productivity, and this is especially true for lean tissue accretion. The purpose of this investigation was to determine the extent to which short-term HS caused muscle dysfunction in skeletal muscle. We have previously found increased free radical injury in skeletal muscle following 24 h of HS. Thus, we hypothesized that HS would lead to apoptosis, autophagy, and decreased mitochondrial content in skeletal muscle...
June 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726978/analysis-of-the-substrate-specificity-of-factor-vii-activating-protease-fsap-and-design-of-specific-and-sensitive-peptide-substrates
#2
Emrah Kara, Dipankar Manna, Geir Åge Løset, Eric L Schneider, Charles S Craik, Sandip Kanse
Factor VII (FVII) activating protease (FSAP) is a circulating serine protease that is likely to be involved in a number of disease conditions such as stroke, atherosclerosis, liver fibrosis, thrombosis and cancer. To date, no systematic information is available about the substrate specificity of FSAP. Applying phage display and positional scanning substrate combinatorial library (PS-SCL) approaches we have characterised the specificity of FSAP towards small peptides. Results were evaluated in the context of known protein substrates as well as molecular modelling of the peptides in the active site of FSAP...
July 20, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28726976/absence-of-transforming-growth-factor-beta-1-in-murine-platelets-reduces-neointima-formation-without-affecting-arterial-thrombosis
#3
Katrin Schaefer, Eva Schütz, Magdalena L Bochenek, Dennis R Riehl, Markus Bosmann, Thomas Münzel, Stavros Konstantinides, Katrin Schäfer
Platelet degranulation at the site of vascular injury prevents bleeding and may affect the chronic vascular wound healing response. Transforming Growth Factor (TGF)-β1 is a major component of platelet α-granules known to accumulating in thrombi. It was our aim to determine the role of TGFβ1 released from activated platelets for neointima formation following arterial injury and thrombosis. Mice with platelet-specific deletion of TGFβ1 (Plt.TGFβ-KO) underwent carotid artery injury. Immunoassays confirmed the absence of active TGFβ1 in platelet releasates and plasma of Plt...
July 20, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28726636/live-cell-visualization-of-gasdermin-d-driven-pyroptotic-cell-death
#4
Joseph K Rathkey, Bryan L Benson, Steven M Chirieleison, Jie Yang, Tsan S Xiao, George R Dubyak, Alex Y Huang, Derek W Abbott
Pyroptosis is a form of cell death important in defenses against pathogens, but which can also result in a potent and sometimes pathological inflammatory response. During pyroptosis, gasdermin D (GSDMD), the pore-forming effector protein, is cleaved, forms oligomers, and inserts into the membranes of the cell, resulting in rapid cell death. However, the potent cell death induction caused by GSDMD has complicated our ability to understand the biology of this protein. Studies aimed at visualizing GSDMD have relied on expression of GSDMD fragments in epithelial cell lines that naturally lack GSDMD expression and also lack the proteases necessary to cleave GSDMD...
July 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28726391/tumor-associated-mutations-in-caspase-6-negatively-impact-catalytic-efficiency
#5
Kevin B Dagbay, Maureen E Hill, Elizabeth Barrett, Jeanne A Hardy
Unregulated, particularly suppressed programmed cell death is one of the distinguishing features of many cancer cells. The cysteine protease caspase-6, one of the executioners of apoptotic cell death, plays a crucial role in regulation of apoptosis. Several CASP6 gene somatic mutations in tumor tissues have been reported. This work explores the effect of CASP6 tumor-associated mutations on the catalytic efficiency and structure of caspase-6. In general, these mutations showed decreased overall catalytic turnover...
July 20, 2017: Biochemistry
https://www.readbyqxmd.com/read/28726323/characterization-of-a-cathepsin-d-protease-from-cho-cell-free-medium-and-mitigation-of-its-impact-on-the-stability-of-a-recombinant-therapeutic-protein
#6
Amareth Lim, Brandon L Doyle, Gerard M Kelly, Angelia M Reed-Bogan, Lawrence H Breen, Parviz A Shamlou, Peter K Lambooy
During purification process development of a recombinant therapeutic protein, an endoproteolytic activity endogenous to the Chinese hamster ovary (CHO) cells and leading to degradation at particular hydrophobic amino acid residues (e.g., Phe and Trp) was observed when processing at acidic pH. The presence of residual levels of protease activity in purified protein batches affected the inherent activity of the product when stored as a solution. In order to develop a robust purification strategy to minimize this undesirable impact, identification and characterization of this protease was essential to ultimately ensure that a solution formulation was stable for many years...
July 20, 2017: Biotechnology Progress
https://www.readbyqxmd.com/read/28726057/macrophage-migration-inhibitory-factor-mif-modulates-trophic-signaling-through-interaction-with-serine-protease-htra1
#7
Åsa Fex Svenningsen, Svenja Löring, Anna Lahn Sørensen, Ha Uyen Buu Huynh, Simone Hjæresen, Nellie Martin, Jesper Bonnet Moeller, Maria Louise Elkjær, Uffe Holmskov, Zsolt Illes, Malin Andersson, Solveig Beck Nielsen, Eirikur Benedikz
Macrophage migration inhibitory factor (MIF), a small conserved protein, is abundant in the immune- and central nervous system (CNS). MIF has several receptors and binding partners that can modulate its action on a cellular level. It is upregulated in neurodegenerative diseases and cancer although its function is far from clear. Here, we report the finding of a new binding partner to MIF, the serine protease HTRA1. This enzyme cleaves several growth factors, extracellular matrix molecules and is implicated in some of the same diseases as MIF...
July 19, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28726036/proteolytic-effects-of-gingipains-on-trefoil-factor-family-peptides
#8
Ponlatham Chaiyarit, Janthima Jaresitthikunchai, Narumon Phaonakrop, Sittiruk Roytrakul, Barbara Potempa, Jan Potempa
OBJECTIVES: The present study was aimed to determine whether trefoil factor family (TFF) peptides which were generally considered to be resistant to proteolysis could be digested by gingipains, a major proteinases produced by Porphyromonas gingivalis. MATERIALS AND METHODS: Recombinant human TFF1, TFF2, and TFF3 peptides were used as substrates. Gingipains including arginine gingipain (RgpB) and lysine gingipain (Kgp) were used as enzymes. Trypsin was used as a control protease...
July 19, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28725907/development-of-a-new-immunoassay-for-human-cathepsin-k-generated-periostin-fragments-as-a-serum-biomarker-for-cortical-bone
#9
Patrick Garnero, Nicolas Bonnet, Serge L Ferrari
Periostin is a matricellular protein mainly expressed by periosteal cells and osteocytes in bone, but is also present in several other tissues. Available immunoassays use antibodies of unclear specificity. The aim of the study was to develop a bone-specific periostin ELISA based on the detection of fragments generated by the osteoclastic and osteocytic protease cathepsin K. In vitro digestion of human recombinant intact periostin by cathepsin K leads to the generation of multiple fragments. Using LS-MS/MS, it was found that the GSLQPIIK peptide was the most efficiently and abundantly generated periostin fragment...
July 19, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28725557/genome-assembly-of-chryseobacterium-sp-strain-ihbb-10212-from-glacier-top-surface-soil-in-the-indian-trans-himalayas-with-potential-for-hydrolytic-enzymes
#10
Mohinder Pal, Mohit Kumar Swarnkar, Hena Dhar, Sanjay Chhibber, Arvind Gulati
The cold-active esterases are gaining importance due to their catalytic activities finding applications in chemical industry, food processes and detergent industry as additives, and organic synthesis of unstable compounds as catalysts. In the present study, the complete genome sequence of 4,843,645 bp with an average 34.08% G + C content and 4260 protein-coding genes are reported for the low temperature-active esterase-producing novel strain of Chrysobacterium isolated from the top-surface soil of a glacier in the cold deserts of the Indian trans-Himalayas...
September 2017: Genomics Data
https://www.readbyqxmd.com/read/28724775/n-degradomic-analysis-reveals-a-proteolytic-network-processing-the-podocyte-cytoskeleton
#11
Markus M Rinschen, Ann-Kathrin Hoppe, Florian Grahammer, Martin Kann, Linus A Völker, Eva-Maria Schurek, Julie Binz, Martin Höhne, Fatih Demir, Milena Malisic, Tobias B Huber, Christine Kurschat, Jayachandran N Kizhakkedathu, Bernhard Schermer, Pitter F Huesgen, Thomas Benzing
Regulated intracellular proteostasis, controlled in part by proteolysis, is essential in maintaining the integrity of podocytes and the glomerular filtration barrier of the kidney. We applied a novel proteomics technology that enables proteome-wide identification, mapping, and quantification of protein N-termini to comprehensively characterize cleaved podocyte proteins in the glomerulus in vivo We found evidence that defined proteolytic cleavage results in various proteoforms of important podocyte proteins, including those of podocin, nephrin, neph1, α-actinin-4, and vimentin...
July 19, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28724763/species-specificity-of-vaccinia-virus-complement-control-protein-towards-bovine-classical-pathway-is-governed-primarily-by-direct-interaction-of-its-acidic-residues-with-factor-i
#12
Jitendra Kumar, Viveka Nand Yadav, Swastik Phulera, Ashish Kamble, Avneesh Kumar Gautam, Hemendra Singh Panwar, Arvind Sahu
Poxviruses display species tropism - variola virus is a human-specific virus, while vaccinia virus causes repeated outbreaks in dairy cattle. Consistent with this, variola virus complement regulator SPICE exhibit selectivity in inhibiting the human alternative complement pathway and vaccinia virus complement regulator VCP display selectivity in inhibiting the bovine alternative complement pathway. In the present study, we examined the species-specificity of VCP and SPICE towards the classical pathway (CP). We observed that VCP is ∼43-fold superior in inhibiting bovine CP than SPICE...
July 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28724722/effect-of-directional-pulling-on-mechanical-protein-degradation-by-atp-dependent-proteolytic-machines
#13
Adrian O Olivares, Hema Chandra Kotamarthi, Benjamin J Stein, Robert T Sauer, Tania A Baker
AAA+ proteases and remodeling machines couple hydrolysis of ATP to mechanical unfolding and translocation of proteins following recognition of sequence tags called degrons. Here, we use single-molecule optical trapping to determine the mechanochemistry of two AAA+ proteases, Escherichia coli ClpXP and ClpAP, as they unfold and translocate substrates containing multiple copies of the titin(I27) domain during degradation initiated from the N terminus. Previous studies characterized degradation of related substrates with C-terminal degrons...
July 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28724693/new-peptide-inhibitor-of-dipeptidyl-peptidase-iv-emdb-1-extends-the-half-life-of-glp-2-and-attenuates-colitis-in-mice-after-topical-administration
#14
Maciej Salaga, Anna Mokrowiecka, Marta Zielinska, Ewa Malecka-Panas, Radzislaw Kordek, Elzbieta Kamysz, Jakub Fichna
Protease inhibition has become a new possible approach in the inflammatory bowel disease (IBD) therapy. A serine exopeptidase, dipeptidyl peptidase IV (DPP IV) is responsible for inactivation of incretine hormone, glucagon-like peptide 2 (GLP-2), a potent stimulator of intestinal epithelium regeneration and growth. Recently we showed that the novel peptide analog of endomorphin-2, EMDB-1 is a potent blocker of DPP IV and has an inhibitory effect on gastrointestinal (GI) smooth muscle contractility. The aim of this study was to characterize the anti-inflammatory effect and mechanism of action of EMDB-1 in the mouse GI tract...
July 19, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28724633/conformationally-organized-lysine-isosteres-in-streptococcus-pyogenes-m-protein-mediate-direct-high-affinity-binding-to-human-plasminogen
#15
Yue Yuan, Jaroslav Zajicek, Cunjia Qiu, Vishwanatha Chandrahas, Shaun W Lee, Victoria A Ploplis, Francis J Castellino
The binding of human plasminogen (hPg) to the surface of the human pathogen Streptococcus pyogenes (GAS) and subsequent hPg activation to the protease plasmin generate a proteolytic surface that GAS employs to circumvent host innate immunity. Direct high-affinity binding of hPg/plasmin to pattern D GAS is fully recapitulated by the hPg kringle 2 domain (K2hPg) and a short internal peptide region (a1a2) of a specific subtype of bacterial surface M protein, present in all GAS pattern D strains. To better understand the nature of this binding, critical to the virulence of many GAS skin-tropic strains, we used high-resolution NMR to define the interaction of recombinant K2hPg with recombinant a1a2 (VKK38) of the M protein from GAS isolate NS455...
July 19, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28723894/cysteine-protease-cathepsin-b-mediates-radiation-induced-bystander-effects
#16
Yu Peng, Man Zhang, Lingjun Zheng, Qian Liang, Hanzeng Li, Jeng-Ting Chen, Hongyan Guo, Sawako Yoshina, Yu-Zen Chen, Xiang Zhao, Xiaoqi Wu, Bin Liu, Shohei Mitani, Jau-Song Yu, Ding Xue
The radiation-induced bystander effect (RIBE) refers to a unique process in which factors released by irradiated cells or tissues exert effects on other parts of the animal not exposed to radiation, causing genomic instability, stress responses and altered apoptosis or cell proliferation. Although RIBEs have important implications for radioprotection, radiation safety and radiotherapy, the molecular identities of RIBE factors and their mechanisms of action remain poorly understood. Here we use Caenorhabditis elegans as a model in which to study RIBEs, and identify the cysteine protease CPR-4, a homologue of human cathepsin B, as the first RIBE factor in nematodes, to our knowledge...
July 19, 2017: Nature
https://www.readbyqxmd.com/read/28722823/rational-design-of-a-highly-potent-and-selective-peptide-inhibitor-of-pace4-by-salt-bridge-interaction-with-d160-at-position-p3
#17
Vahid Dianati, Azar Shamloo, Anna Kwiatkowska, Roxane Desjardins, Armand Soldera, Robert Day, Yves L Dory
PACE4, a member of the proprotein convertases (PCs) family of serine proteases, is a validated target for prostate cancer. Our group has developed a potent and selective PACE4 inhibitor: Ac-LLLLRVKR-NH2 . In seeking for modifications to increase the selectivity of this ligand toward PACE4, we replaced one of its P3 Val methyl groups with a basic group capable of forming a salt bridge with D160 of PACE4. The resulting inhibitor is eight times more potent than the P3 Val parent inhibitor and two times more selective over furin, because the equivalent salt bridge with furin E257 is not optimal...
July 19, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28722780/add-on-effects-of-fluvastatin-in-simeprevir-pegylated-interferon-ribavirin-combination-therapy-for-patients-with-genotype-1-hepatitis-c-virus-infection-a-randomized-controlled-study
#18
Goki Suda, Jun Ito, Atsushi Nagasaka, Yoshiya Yamamoto, Ken Furuya, Munenori Okamoto, Katsumi Terashita, Tomoe Kobayashi, Izumi Tsunematsu, Junichi Yoshida, Takashi Meguro, Masatsugu Ohara, Naoki Kawagishi, Megumi Kimura, Machiko Umemura, Takaaki Izumi, Yoko Tsukuda, Masato Nakai, Takuya Sho, Mitsuteru Natsuizaka, Kenichi Morikawa, Koji Ogawa, Naoya Sakamoto
BACKGROUND: The Japan Society of Hepatology guidelines indicate that HCV protease inhibitor combination therapy with simeprevir (SMV), pegylated-interferon (Peg-IFN), and ribavirin (RBV) is a therapeutic option for patients who fail to respond to a direct direct-acting antiviral (DAA) containing regimen. However, treatment outcomes have room for improvement. Fluvastatin (FLV) add-on treatment in Peg-IFN and RBV combination therapy for hepatitis C-infected patients significantly improved the sustained virological response (SVR), but the add-on effect of FLV on SMV combination therapy is not well understood...
July 19, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/28722358/chemoenzymatic-synthesis-of-polypeptides-for-use-as-functional-and-structural-materials
#19
REVIEW
Kousuke Tsuchiya, Keiji Numata
Polypeptides inspired by the natural functional and structural proteins present in living systems are promising materials for various fields in terms of their versatile functionality and physical properties. Designing and synthesizing mimetic sequences of specific peptide motifs in proteins are important for exploring the functionality of natural proteins. Chemoenzymatic polymerization, which utilizes aminolysis (i.e., the reverse reaction of hydrolysis catalyzed by proteases), is a useful technique for synthesizing artificial polypeptide materials and has several advantages, including facile synthesis protocols, environmental friendliness, scalability, and atom economy...
July 19, 2017: Macromolecular Bioscience
https://www.readbyqxmd.com/read/28722103/decreased-levels-of-active-upa-and-klk8-assessed-by-111-in-mica-401-binding-correlate-with-the-seizure-burden-in-an-animal-model-of-temporal-lobe-epilepsy
#20
Stephan Missault, Lore Peeters, Halima Amhaoul, David Thomae, Annemie Van Eetveldt, Barbara Favier, Anagha Thakur, Jeroen Van Soom, Asla Pitkänen, Koen Augustyns, Jurgen Joossens, Steven Staelens, Stefanie Dedeurwaerdere
OBJECTIVE: Urokinase-type plasminogen activator (uPA) and kallikrein-related peptidase 8 (KLK8) are serine proteases that contribute to extracellular matrix (ECM) remodeling after brain injury. They can be labelled with the novel radiotracer [(111) In]MICA-401. As the first step in exploring the applicability of [(111) In]MICA-401 in tracing the mechanisms of postinjury ECM reorganization in vivo, we performed in vitro and ex vivo studies, assessing [(111) In]MICA-401 distribution in the brain in two animal models: kainic acid-induced status epilepticus (KASE) and controlled cortical impact (CCI)-induced traumatic brain injury (TBI)...
July 19, 2017: Epilepsia
keyword
keyword
63649
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"