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Bacteria Belonging to Pseudomonas Typographi Sp. Nov. from the Bark Beetle Ips Typographus Have Genomic Potential to Aid in the Host Ecology
insects Article Bacteria Belonging to Pseudomonas typographi sp. nov. from the Bark Beetle Ips typographus Have Genomic Potential to Aid in the Host Ecology Ezequiel Peral-Aranega 1,2 , Zaki Saati-Santamaría 1,2 , Miroslav Kolaˇrik 3,4, Raúl Rivas 1,2,5 and Paula García-Fraile 1,2,4,5,* 1 Microbiology and Genetics Department, University of Salamanca, 37007 Salamanca, Spain; [email protected] (E.P.-A.); [email protected] (Z.S.-S.); [email protected] (R.R.) 2 Spanish-Portuguese Institute for Agricultural Research (CIALE), 37185 Salamanca, Spain 3 Department of Botany, Faculty of Science, Charles University, Benátská 2, 128 01 Prague, Czech Republic; [email protected] 4 Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology of the Academy of Sciences of the Czech Republic, 142 20 Prague, Czech Republic 5 Associated Research Unit of Plant-Microorganism Interaction, University of Salamanca-IRNASA-CSIC, 37008 Salamanca, Spain * Correspondence: [email protected] Received: 4 July 2020; Accepted: 1 September 2020; Published: 3 September 2020 Simple Summary: European Bark Beetle (Ips typographus) is a pest that affects dead and weakened spruce trees. Under certain environmental conditions, it has massive outbreaks, resulting in attacks of healthy trees, becoming a forest pest. It has been proposed that the bark beetle’s microbiome plays a key role in the insect’s ecology, providing nutrients, inhibiting pathogens, and degrading tree defense compounds, among other probable traits. During a study of bacterial associates from I. typographus, we isolated three strains identified as Pseudomonas from different beetle life stages. In this work, we aimed to reveal the taxonomic status of these bacterial strains and to sequence and annotate their genomes to mine possible traits related to a role within the bark beetle holobiont. -
Bioprospecting for Hydroxynitrile Lyases by Blue Native PAGE Coupled HCN Detection
Send Orders for Reprints to [email protected] Current Biotechnology, 2015, 4, 111-117 111 Bioprospecting for Hydroxynitrile Lyases by Blue Native PAGE Coupled HCN Detection Elisa Lanfranchi1, Eva-Maria Köhler1, Barbara Darnhofer1,2,3, Kerstin Steiner1, Ruth Birner-Gruenberger1,2,3, Anton Glieder1,4 and Margit Winkler*,1 1ACIB GmbH, Graz, Austria; 2Institute for Pathology, Medical University of Graz, Graz, Austria; 3Omics Center Graz, BioTechMed, Graz, Austria; 4Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Graz, Austria Abstract: Hydroxynitrile lyase enzymes (HNLs) catalyze the stereoselective addition of HCN to carbonyl compounds to give valuable chiral hydroxynitriles. The discovery of new sources of HNL activity has been reported several times as the result of extensive screening of diverse plants for cyanogenic activity. Herein we report a two step-method that allows estimation of not only the native size of the active HNL enzyme but also its substrate specificity. Specifically, crude protein extracts from plant tissue are first subjected to blue native-PAGE. The resulting gel is then directly used for an activity assay in which the formation of hydrocyanic acid (HCN) is detected upon the cyanogenesis reaction of any cyanohydrin catalyzed by the enzyme of interest. The same gel may be used with different substrates, thus exploring the enzyme’s substrate scope already on the screening level. In combination with mass spectrometry, sequence information can be retrieved, which is demonstrated -
Itraq-Based Quantitative Proteomics Analysis Reveals the Mechanism Underlying the Weakening of Carbon Metabolism in Chlorotic Tea Leaves
Article iTRAQ-Based Quantitative Proteomics Analysis Reveals the Mechanism Underlying the Weakening of Carbon Metabolism in Chlorotic Tea Leaves Fang Dong 1,2, Yuanzhi Shi 1,2, Meiya Liu 1,2, Kai Fan 1,2, Qunfeng Zhang 1,2,* and Jianyun Ruan 1,2 1 Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China; [email protected] (F.D.); [email protected] (Y.S.); [email protected] (M.L.); [email protected] (K.F.); [email protected] (J.R.) 2 Key Laboratory for Plant Biology and Resource Application of Tea, the Ministry of Agriculture, Hangzhou 310008, China * Correspondence: [email protected]; Tel.: +86-571-8527-0665 Received: 7 November 2018; Accepted: 5 December 2018; Published: 7 December 2018 Abstract: To uncover mechanism of highly weakened carbon metabolism in chlorotic tea (Camellia sinensis) plants, iTRAQ (isobaric tags for relative and absolute quantification)-based proteomic analyses were employed to study the differences in protein expression profiles in chlorophyll-deficient and normal green leaves in the tea plant cultivar “Huangjinya”. A total of 2110 proteins were identified in “Huangjinya”, and 173 proteins showed differential accumulations between the chlorotic and normal green leaves. Of these, 19 proteins were correlated with RNA expression levels, based on integrated analyses of the transcriptome and proteome. Moreover, the results of our analysis of differentially expressed proteins suggested that primary carbon metabolism (i.e., carbohydrate synthesis and transport) was inhibited in chlorotic tea leaves. The differentially expressed genes and proteins combined with photosynthetic phenotypic data indicated that 4-coumarate-CoA ligase (4CL) showed a major effect on repressing flavonoid metabolism, and abnormal developmental chloroplast inhibited the accumulation of chlorophyll and flavonoids because few carbon skeletons were provided as a result of a weakened primary carbon metabolism. -
Characterization of Α-L-Fucosidase and Other Digestive Hydrolases From
Acta Tropica 141 (2015) 118–127 Contents lists available at ScienceDirect Acta Tropica journal homepage: www.elsevier.com/locate/actatropica Characterization of ␣-L-fucosidase and other digestive hydrolases from Biomphalaria glabrata Natalia N. Perrella a,b, Rebeca S. Cantinha c,d, Eliana Nakano c, Adriana R. Lopes a,∗ a Laboratory of Biochemistry and Biophysics—Instituto Butantan, São Paulo, Brazil b Programa de Pós Graduac¸ ão Interunidades em Biotecnologia PPIB, Universidade de São Paulo, São Paulo, SP, Brazil c Laboratory of Parasitology—Instituto Butantan, São Paulo, Brazil d Instituto de Pesquisas Energéticas e Nucleares, Universidade de São Paulo, São Paulo, SP, Brazil article info abstract Article history: Schistosoma mansoni is one of the major agents of the disease Schistosomiasis, which is one of the Received 10 February 2014 major global public health concerns. Biomphalaria glabrata is an obligate intermediate mollusc host of Received in revised form 3 July 2014 S. mansoni. Although the development of S. mansoni occurs in the snail hepatopancreas, studies that Accepted 12 August 2014 focus on this organ remain limited. In this study, we biochemically identified five distinct carbohy- Available online 16 September 2014 drases (amylase, maltase, ␣-glucosidase, trehalase, and ␣-L-fucosidase), lipases, and peptidases in the B. glabrata hepatopancreas and focused on the isolation and characterization of the activity of ␣-L- Keywords: fucosidase. The isolated ␣-L-fucosidase has a molecular mass of 141 kDa, an optimum pH of 5.8, and Hepatopancreas ␣ Enzymes is inhibited by Tris, fucose, and 1-deoxyfuconojirimycin. B. glabrata -L-fucosidase is an exoglycosidase ␣-L-Fucosidase that can hydrolyze the natural substrate fucoidan to fucose residues. -
Identification and Partial Characterization of a Family of Putative Palmitoyltransferases in Dictyostelium Discoideum Brent Elliot Wells
The University of Maine DigitalCommons@UMaine Electronic Theses and Dissertations Fogler Library 2003 Identification and Partial Characterization of a Family of Putative Palmitoyltransferases in Dictyostelium Discoideum Brent Elliot Wells Follow this and additional works at: http://digitalcommons.library.umaine.edu/etd Part of the Biochemistry Commons Recommended Citation Wells, Brent Elliot, "Identification and Partial Characterization of a Family of Putative Palmitoyltransferases in Dictyostelium Discoideum" (2003). Electronic Theses and Dissertations. 301. http://digitalcommons.library.umaine.edu/etd/301 This Open-Access Thesis is brought to you for free and open access by DigitalCommons@UMaine. It has been accepted for inclusion in Electronic Theses and Dissertations by an authorized administrator of DigitalCommons@UMaine. IDENTIFICATION AND PARTIAL CHARACTERIZATION OF A FAMILY OF PUTATIVE PALMITOYLTRANSFERASES IN DICTYOSTELIUM DISCOIDEUM BY Brent Elliott Wells B.S. University of Utah, 1994 A THESIS Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Science (in Biochemistry) The Graduate School The University of Maine December, 2003 Advisory Committee: Robert E. Gundersen, Associate Professor of Biochemistry, Advisor Keith W. Hutchison, Professor of Biochemistry Mary Rumpho-Kennedy, Professor of Biochemistry LIBRARY RIGHTS STATEMENT In presenting this thesis in partial fulfillment of the requirements for an advanced degree at The University of Maine, I agree that the Library shall make it freely available for inspection. I further agree that permission for "fair use" copying of this thesis for scholarly purposes may be granted by the Librarian. It is understood that any copying or publication of this thesis for financial gain shall not be allowed without my written permission. -
Glycoproteomics-Based Signatures for Tumor Subtyping and Clinical Outcome Prediction of High-Grade Serous Ovarian Cancer
ARTICLE https://doi.org/10.1038/s41467-020-19976-3 OPEN Glycoproteomics-based signatures for tumor subtyping and clinical outcome prediction of high-grade serous ovarian cancer Jianbo Pan 1,2,3, Yingwei Hu1,3, Shisheng Sun 1,3, Lijun Chen1, Michael Schnaubelt1, David Clark1, ✉ Minghui Ao1, Zhen Zhang1, Daniel Chan1, Jiang Qian2 & Hui Zhang 1 1234567890():,; Inter-tumor heterogeneity is a result of genomic, transcriptional, translational, and post- translational molecular features. To investigate the roles of protein glycosylation in the heterogeneity of high-grade serous ovarian carcinoma (HGSC), we perform mass spectrometry-based glycoproteomic characterization of 119 TCGA HGSC tissues. Cluster analysis of intact glycoproteomic profiles delineates 3 major tumor clusters and 5 groups of intact glycopeptides. It also shows a strong relationship between N-glycan structures and tumor molecular subtypes, one example of which being the association of fucosylation with mesenchymal subtype. Further survival analysis reveals that intact glycopeptide signatures of mesenchymal subtype are associated with a poor clinical outcome of HGSC. In addition, we study the expression of mRNAs, proteins, glycosites, and intact glycopeptides, as well as the expression levels of glycosylation enzymes involved in glycoprotein biosynthesis pathways in each tumor. The results show that glycoprotein levels are mainly controlled by the expression of their individual proteins, and, furthermore, that the glycoprotein-modifying glycans cor- respond to the protein levels of glycosylation enzymes. The variation in glycan types further shows coordination to the tumor heterogeneity. Deeper understanding of the glycosylation process and glycosylation production in different subtypes of HGSC may provide important clues for precision medicine and tumor-targeted therapy. -
The HOTHEAD Protein: Assessing Enzymatic Activity Using Computational and Recombinant Protein Expression Approaches
The HOTHEAD Protein: Assessing Enzymatic Activity using Computational and Recombinant Protein Expression Approaches By Eric Le Dreff-Kerwin A thesis Presented to the University of Waterloo In fulfillment of the Thesis requirement for the degree of Master of Science In Biology Waterloo, Ontario, Canada, 2019 © Eric Le Dreff-Kerwin 2019 Author’s Declaration I hereby declare that I am the sole author of this thesis. This is a true copy of the thesis, including any required final revisions, as accepted by my examiners. I understand that my thesis may be made electronically available to the public. ii Abstract In Arabidopsis thaliana, a number of genes regulating cuticle synthesis have been identified by virtue of organ fusion phenotype. One such gene, HOTHEAD (HTH) was among those originally identified by this phenotype but its exact role in cuticle formation has proven challenging to determine. Previous bioinformatic work has identified that the HTH protein is a member of the GMC oxidoreductase family, and shares peptide sequence identity with a mandelonitrile lyase and an alcohol dehydrogenase that are within the same protein family. This thesis work investigated the potential enzymatic function of HTH by comparing a structural model to two structural analogs. The structure model of HTH, as determined in this study, shows that HTH shares certain conserved features of GMC proteins. The aim of this research also included isolating a recombinantly expressed HTH protein from Escherichia coli and initial work in Pichia pastoris. Protein isolation attempts in Escherichia coli failed to yield active HTH protein, potentially due to the lack of post-translational modifications. -
CYP2A6) by P53
Transcriptional Regulation of Human Stress Responsive Cytochrome P450 2A6 (CYP2A6) by p53 Hao Hu M.Biotech. (Biotechnology) 2012 The University of Queensland B.B.A. 2009 University of Electronic Science and Technology of China B.Sc. (Pharmacy) 2009 University of Electronic Science and Technology of China A thesis submitted for the degree of Doctor of Philosophy at The University of Queensland in 2016 School of Medicine ABSTRACT Human cytochrome P450 (CYP) 2A6 is highly expressed in the liver and the encoding gene is regulated by various stress activated transcription factors, such as the nuclear factor (erythroid-derived 2)-like 2 (Nrf-2). Unlike the other xenobiotic metabolising CYP enzymes (XMEs), CYP2A6 only plays a minor role in xenobiotic metabolism. The CYP2A6 is highly induced by multiple forms of cellular stress conditions, where XMEs expression is normally inhibited. Recent findings suggest that the CYP2A6 plays an important role in regulating BR homeostasis. A computer based sequence analysis on the 3 kb proximate CYP2A6 promoter revealed several putative binding sites for p53, a protein that mediates regulation of antioxidant and apoptosis pathways. In this study, the role of p53 in CYP2A6 gene regulation is demonstrated. The site closest to transcription start site (TSS) is highly homologous with the p53 consensus sequence. The p53 responsiveness of this site was confirmed by transfections with various stepwise deleted of CYP2A6-5’-Luc constructs containing the putative p53RE. Deletion of the putative p53RE resulted in a total abolishment of p53 responsiveness of CYP2A6 promoter. Specific binding of p53 to the putative p53RE was detected by electrophoresis mobility shift assay. -
Characterisation of Bilirubin Metabolic Pathway in Hepatic Mitochondria Siti Nur Fadzilah Muhsain M.Sc
Characterisation of Bilirubin Metabolic Pathway in Hepatic Mitochondria Siti Nur Fadzilah Muhsain M.Sc. (Medical Research) 2005 Universiti Sains Malaysia Postgrad. Dip. (Toxicology) 2003 University of Surrey B.Sc.(Biomed. Sc.) 2000 Universiti Putra Malaysia A thesis submitted for the degree of Doctor of Philosophy at The University of Queensland in 2014 School of Medicine ABSTRACT Bilirubin (BR), a toxic waste product of degraded haem, is a potent antioxidant at physiological concentrations. To achieve the maximum benefit of BR, its intracellular level needs to be carefully regulated. A system comprising of two enzymes, haem oxygenase-1 (HMOX1) and cytochrome P450 2A5 (CYP2A5) exists in the endoplasmic reticulum (ER), responsible for regulating BR homeostasis. This system is induced in response to oxidative stress. In this thesis, oxidative stress caused accumulation of these enzymes in mitochondria — major producers and targets of reactive oxygen species (ROS) — is demonstrated. To understand the significance of this intracellular targeting, properties of microsomal and mitochondrial BR metabolising enzymes were compared and the capacity of mitochondrial CYP2A5 to oxidise BR in response to oxidative stress is reported. Microsomes and mitochondrial fractions were isolated from liver homogenates of DBA/2J mice, administered with sub-toxic dose of pyrazole, an oxidant stressor. The purity of extracted organelles was determined by analysing the expressions and activities of their respective marker enzymes. HMOX1 and CYP2A5 were significantly increased in microsomes and even more so in mitochondria in response to pyrazole-induced oxidative stress. By contrast, the treatment did not increase either microsomes or mitochondrial Uridine-diphosphate-glucuronosyltransferase 1A1 (UGT1A1), the sole enzyme that catalyses BR elimination through glucuronidation. -
United States Patent (19) 11 Patent Number: 5,981,835 Austin-Phillips Et Al
USOO598.1835A United States Patent (19) 11 Patent Number: 5,981,835 Austin-Phillips et al. (45) Date of Patent: Nov. 9, 1999 54) TRANSGENIC PLANTS AS AN Brown and Atanassov (1985), Role of genetic background in ALTERNATIVE SOURCE OF Somatic embryogenesis in Medicago. Plant Cell Tissue LIGNOCELLULOSC-DEGRADING Organ Culture 4:107-114. ENZYMES Carrer et al. (1993), Kanamycin resistance as a Selectable marker for plastid transformation in tobacco. Mol. Gen. 75 Inventors: Sandra Austin-Phillips; Richard R. Genet. 241:49-56. Burgess, both of Madison; Thomas L. Castillo et al. (1994), Rapid production of fertile transgenic German, Hollandale; Thomas plants of Rye. Bio/Technology 12:1366–1371. Ziegelhoffer, Madison, all of Wis. Comai et al. (1990), Novel and useful properties of a chimeric plant promoter combining CaMV 35S and MAS 73 Assignee: Wisconsin Alumni Research elements. Plant Mol. Biol. 15:373-381. Foundation, Madison, Wis. Coughlan, M.P. (1988), Staining Techniques for the Detec tion of the Individual Components of Cellulolytic Enzyme 21 Appl. No.: 08/883,495 Systems. Methods in Enzymology 160:135-144. de Castro Silva Filho et al. (1996), Mitochondrial and 22 Filed: Jun. 26, 1997 chloroplast targeting Sequences in tandem modify protein import specificity in plant organelles. Plant Mol. Biol. Related U.S. Application Data 30:769-78O. 60 Provisional application No. 60/028,718, Oct. 17, 1996. Divne et al. (1994), The three-dimensional crystal structure 51 Int. Cl. ............................. C12N 15/82; C12N 5/04; of the catalytic core of cellobiohydrolase I from Tricho AO1H 5/00 derma reesei. Science 265:524-528. -
Properties of Chlorophyllase from Capsicum Annuum L. Fruits
Properties of Chlorophyllase from Capsicum annuum L. Fruits Dámaso Hornero-Méndez and Marí a Isabel Mínguez-Mosquera* Departamento de Biotecnologia de Alimentos, Instituto de la Grasa (CSIC), Av. Padre Garcia Tejero, 4, 41012-Sevilla, SPAIN. Fax: +34-954691262. E-mail: [email protected] * Author for correspondence and reprint requests Z. Naturforsch. 56c, 1015-1021 (2001); received June 27/August 6 , 2001 Chlorophyll, Chlorophyllase, Capsicum annuum The in vitro properties of semi-purified chlorophyllase (chlorophyll-chlorophyllido hy drolase, EC 3.1.1.14) from Capsicum annuum fruits have been studied. The enzyme showed an optimum of activity at pH 8.5 and 50 °C. Substrate specificity was studied for chlorophyll (Chi) a, Chi b, pheophytin (Phe) a and Phe b, with K m values of 10.70, 4.04, 2.67 and 6.37 ^im respectively. Substrate inhibition was found for Phe b at concentrations higher than 5 ^m. Chlorophyllase action on Chi a ’ and Chi b' was also studied but no hydrolysis was observed, suggesting that the mechanism of action depends on the configuration at C-132 in the chloro phyll molecule, with the enzyme acting only on compounds with R132 stereochemistry. The effect of various metals (Mg2+, Hg2+, Cu2+, Zn2+, Co , Fe2+ and Fe3+) was also investigated, and a general inhibitory effect was found, this being more marked for Hg2+ and Fe2+. Func tional groups such as -SH and -S-S- seemed to participate in the formation of the enzyme- substrate complex. Chelating ion and the carbonyl group at C3 appeared to be important in substrate recognition by the enzyme. -
Summary & Conclusions
Enzymatic functionalization and degradation of natural and synthetic polymers Von der Fakultät für Mathematik, Informatik und Naturwissenschaften der RWTH Aachen University zur Erlangung des akademischen Grades einer Doktorin der Naturwissenschaften genehmigte Dissertation vorgelegt von Shohana Subrin Islam M. Sc. Biotechnologie aus Dhaka, Bangladesch Berichter: Univ. -Prof. Dr. Ulrich Schwaneberg Univ. -Prof. Dr. Lothar Elling Tag der mündlichen Prüfung: 23.01.2019 Diese Dissertation ist auf den Internetseiten der Universitätsbibliothek verfügbar. To my mom & my sister-the two persons in the world who always stand by me Table of content Table of content Table of content _______________________________________________________________ v Publications and patents ________________________________________________________ ix Abstract _____________________________________________________________________ xi 1. General introduction _______________________________________________________ 1 1.1 Enzymatic functionalization of (bio)polymers _______________________________________ 1 1.2 Enzymatic degradation of polymers _______________________________________________ 3 1.3 Protein engineering ____________________________________________________________ 5 1.3.1 Directed evolution of enzymes _________________________________________________________ 6 1.3.2 KnowVolution – Directed Evolution 2.0 __________________________________________________ 9 1.4 Aims of the dissertation _______________________________________________________ 11 2. Engineering of