51 results for “al mutant”

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Research ArticleOpen accessIn the abstractComparative Analysis of Surface Microhardness and Antimicrobial Activity of Conventional and Bioactive Composite Materials for Dental RestorationsBruno Fongaro Dalbosco, Rafael da Silva Vanolli, Poliana Maria de Faveri Cardoso et al.This study evaluated the fluoride release capability, antimicrobial activity, and surface microhardness of bioactive composite resins, critical properties for the effectiveness and durability of dental materials in restorative procedures. Conventional and bioactive composite resins with varying viscosities were tested. Specimens of each resin type were prepared and stored in physiological saline solution for 24 hours to simulate oral conditions. Surface … …Current Research in Dentistry, Vol. 16, Issue 1 · 29 Jan 2026 · 2,813 accessesView PDF Cite

Research ArticleOpen accessIn the abstractThe Arid3a Transcription Factor Rescues Natural and RAS-V12-Induced Senescence Via a Rb-Dependent PathwayChristian Schmidt, Dongkyoon Kim, Shawn Mathur et al.Primary cells are protected against oncogenic events by undergoing premature cellular senescence—an irreversible cell cycle arrest activated by mitogenic signaling as well as by overexpression of tumor suppressors, including p16INK4A, p53 and PML. In the human, downregulation of Dril1/E2F-BP1, a transcriptional regulator of E2F, promotes PML-dependent premature senescence and bypass of ant-iproliferative signaling by p19Arf/p53/p21Cip1 and p16INK4a to prevent both … …American Journal of Immunology, Vol. 13, Issue 4 · 4 Nov 2017 · 8,397 accessesView PDF Cite

Review ArticleOpen accessIn the abstractThe HCV Replicase InteractomeAntonio Mas, Pilar Clemente-Casares, Eugenio Ramírez, Rosario SabariegosViruses are obligate parasites and can only reproduce within host cells because they lack metabolic pathways to complete their replication cycles. Host factors required in viral replication are mainly those involved in lipid metabolism, cell cycle control and apoptosis, cell-to-cell interactions, immune system regulation, etc. Several inhibitors targeting viral polymerases have been designed. However, the rapid appearance of resistant mutants, … …Current Research in Virology, Vol. 5, Issue 1 · 27 Jul 2016 · 13,215 accessesView PDF Cite

Research ArticleOpen accessIn the abstractPhenotypic ESBL Detection in Acinetobacter baumannii: A Real ChallengeGeetanjali M. Litake, Vikram S. Ghole, Krishna B. Niphadkar, Suresh G. JoshiClinical Laboratory Standards Institute (CLSI) recommends two-step approach for extended-spectrum-β-lactamase (ESBL) detection which includes the screening of recommended agents and the phenotypic confirmation of ESBL using a combination of screening agent and β-lactamase inhibitor. To investigate this approach, we screened 145 β-lactamase-producing Acinetobacter baumannii isolates for ESBL from tracheal secretions using double disk synergy test (DDST) and phenotypic confirmatory disc … …American Journal of Infectious Diseases, Vol. 11, Issue 3 · 19 Oct 2015 · 7,773 accessesView PDF Cite

Research ArticleOpen accessIn the abstractCloning and Functional Analysis of tri14 in Trichoderma brevicompactumXu-Ping Shentu, Xiao-Feng Yuan, Wei-Ping Liu et al.Trichodermin, one of the trichothecenes, is a potential antifungal antibiotic and a protein synthesis inhibitor. Trichodermin is synthesized mainly by Trichoderma brevicompactum, but the biosynthetic pathway has yet been completely elucidated. Our earlier transcriptome assay on the trichodermin synthesis in T. brevicompactum 0248 identified a unique tri14 transcript, designated Tbtri14, that was co-regulated with other tri cluster genes. However, the … …American Journal of Biochemistry and Biotechnology, Vol. 11, Issue 3 · 25 Aug 2015 · 7,395 accessesView PDF Cite

Research ArticleOpen accessIn the abstractDiscovery of Evolutionary Divergence of Biological Nitrogen Fixation and Photosynthesis: Fine Tuning of Biogenesis of the NifH and the ChlL by a Peptidyl-Prolyl Cis/Trans IsomeraseNara Gavini, Sinny Delacroix, Kelvin Harris Jr., Lakshmi PulakatProblem statement: Despite the structural and functional similarities between the nitrogenase that performs biological nitrogen fixation reaction and the Dark Protochlorphyllide Oxidoreductase (DPOR) that performs chlorophyll-biosynthesis, attempts to substitute nitrogenase-components with DPOR-components have hitherto failed. This investigation was undertaken to test if Chlamydomonas reinhardtii protochlorophyllide (Pchlide) reductase (ChlL) that shares some structural similarity with Nitrogenase Reductase (NifH) could complement the … …American Journal of Biochemistry and Biotechnology, Vol. 7, Issue 4 · 17 Feb 2012 · 7,620 accessesView PDF Cite

Research ArticleOpen accessIn the abstractAnalysis of Resistance to Human Immunodeficiency Virus Protease Inhibitors Using Molecular Mechanics and Machine Learning StrategiesA. Harishchander, D. Alex Anand, Sanjib SenapatiProblem statement: Drug resistance is the most important factor, which influences the failure of current HIV therapies. So, the ability to predict the drug resistance of HIV-1 protease mutants will be useful in developing more effective and longer lasting treatment regimens. Approach: Drug resistance of HIV-1 protease is predicted with two current protease inhibitors (Indinavir and Saquinavir). The problem was … …Current Research in Medicine, Vol. 1, Issue 2 · 31 Oct 2010 · 7,206 accessesView PDF Cite

Research ArticleOpen accessIn the abstractProtective Effects of Covalent Cross-Linking on Proteolysis of Human Coproporphyrinogen Oxidase and Implications for PorphyriaAhmed W. Jafri, Jason R. Stephenson, Justin B. Morgenthaler et al.The effects of covalent cross-linkers on the enzyme, coproporphyrinogen oxidase, had been previously studied but their role in protecting the enzyme from protease cleavage has not been evaluated. Therefore, we examined how the cross-linker bis (sulfosuccinimidyl) suberate (BS3) affects the ability of trypsin to digest purified, wild type recombinant human coproporphyrinogen oxidase and selected mutants. Following incubation, the apparent molecular … …American Journal of Biochemistry and Biotechnology, Vol. 4, Issue 4 · 31 Dec 2008 · 6,690 accessesView PDF Cite

Research ArticleOpen accessIn the abstractSignaling Pathways Involved In Dengue-2 Virus Infection Induced RANTES OverexpressionYing-Ray Lee, Huan-Yao Lei, Shun-Hua Chen et al.Dengue viruses participate in liver inflammation by inducting the expression of various chemokines including Regulated on Activation Normal T-cell Expressed and Secreted (RANTES). However, the underlying signaling remains unknown. Here, we reveal that Ras, Raf-1 and three mitogen-activated protein kinases (MAPKs) p38, extracellular signal-regulated kinase (Erk), and c-jun-NH2-terminal kinase (JNK) can be activated or phosphorylated in dengue-2 virus infected hepatocyte … …American Journal of Infectious Diseases, Vol. 4, Issue 1 · 31 Mar 2008 · 7,176 accessesView PDF Cite

Research ArticleOpen accessIn the abstractCreation of Tetracycline Regulatable Knockouts of ORFF Gene from the LD1 Locus of Leishmania donovaniBindu Sukumaran, Manju Jain, Peter J. Myler et al.The tetracycline repressor/operator system was adapted for use in Leishmania donovani. In order to investigate the possible importance and function of open reading frame F (ORFF) in Leishmania donovani strain AG83 that has a single copy of ORFF in the LD1 locus on chromosome 35, we have attempted to generate tetracycline regulatable single allele mutants of ORFF. Leishmania cells expressing … …American Journal of Biochemistry and Biotechnology, Vol. 3, Issue 4 · 31 Dec 2007 · 6,832 accessesView PDF Cite