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https://www.readbyqxmd.com/read/29223801/the-external-face-of-candida-albicans-a-proteomic-view-of-the-cell-surface-and-the-extracellular-environment
#1
Ana Gil-Bona, Ahinara Amador-García, Concha Gil, Lucia Monteoliva
The cell surface and secreted proteins are the initial points of contact between Candida albicans and the host. Improvements in protein extraction approaches and mass spectrometers have allowed researchers to obtain a comprehensive knowledge of these external subproteomes. In this paper, we review the published proteomic studies that have examined C. albicans extracellular proteins, including the cell surface proteins or surfome and the secreted proteins or secretome. The use of different approaches to isolate cell wall and cell surface proteins, such as fractionation approaches or cell shaving, have resulted in different outcomes...
December 6, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/29221973/pathogens-toolbox-to-manipulate-human-complement
#2
REVIEW
Francisco J Fernández, Sara Gómez, M Cristina Vega
The surveillance and pathogen fighting functions of the complement system have evolved to protect mammals from life-threatening infections. In turn, pathogens have developed complex molecular mechanisms to subvert, divert and evade the effector functions of the complement. The study of complement immunoevasion by pathogens sheds light on their infection drivers, knowledge that is essential to implement therapies. At the same time, complement evasion also acts as a discovery ground that reveals important aspects of how complement works under physiological conditions...
December 5, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/29205785/plant-polyphenols-stimulate-adhesion-to-intestinal-mucosa-and-induce-proteome-changes-in-the-probiotic-lactobacillus-acidophilus-ncfm
#3
Hasan Ufuk Celebioglu, Marta Delsoglio, Susanne Brix, Enrica Pessione, Birte Svensson
SCOPE: Plant phenolics, known to exert beneficial effects on human health, were supplemented to cultures of the probiotic bacterium Lactobacillus acidophilus NCFM (NCFM) to assess their effect on its adhesive capacity and the abundancy of individual proteins. METHODS AND RESULTS: The presence of resveratrol and ferulic acid during bacterial growth stimulated adhesion of NCFM to mucin and human intestinal HT-29 cells, while tannic acid improved adhesion only to HT-29 cells and caffeic acid had very modest effect overall...
December 4, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29203708/protein-moonlighting-what-is-it-and-why-is-it-important
#4
REVIEW
Constance J Jeffery
Members of the GroEL/HSP60 protein family have been studied for many years because of their critical roles as ATP-dependent molecular chaperones, so it might come as a surprise that some have important functions in ATP-poor conditions, for example, when secreted outside the cell. At least some members of each of the HSP10, HSP70, HSP90, HSP100 and HSP110 heat shock protein families are also 'moonlighting proteins'. Moonlighting proteins exhibit more than one physiologically relevant biochemical or biophysical function within one polypeptide chain...
January 19, 2018: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/29203706/heat-shock-proteins-as-modulators-and-therapeutic-targets-of-chronic-disease-an-integrated-perspective
#5
Adrienne L Edkins, John T Price, A Graham Pockley, Gregory L Blatch
Many heat shock proteins (HSPs) are essential to survival as a consequence of their role as molecular chaperones, and play a critical role in maintaining cellular proteostasis by integrating the fundamental processes of protein folding and degradation. HSPs are arguably among the most prominent classes of proteins that have been broadly linked to many human disorders, with changes in their expression profile and/or intracellular/extracellular location now being described as contributing to the pathogenesis of a number of different diseases...
January 19, 2018: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/29187596/the-dutpase-of-white-spot-syndrome-virus-assembles-its-active-sites-in-a-noncanonical-manner
#6
Kun Zang, Fuhua Li, Qingjun Ma
dUTPases are essential enzymes for maintaining genome integrity and have recently been shown to play moonlighting roles when containing extra sequences. Interestingly, the trimeric dUTPase of white spot syndrome virus (wDUT) harbors a sequence insert at the position preceding the C-terminal catalytic motif V (pre-V insert), rarely seen in other dUTPases. However, whether this extra sequence endows wDUT with additional properties is unknown. Herein, we present the crystal structures of wDUT in both ligand-free and ligand-bound forms...
November 29, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29186975/mammalian-sulfur-amino-acid-metabolism-a-nexus-between-redox-regulation-nutrition-epigenetics-and-detoxification
#7
María Angeles Pajares, Dolores Pérez-Sala
SIGNIFICANCE: Transsulfuration allows conversion of methionine into cysteine using homocysteine as an intermediate. This pathway produces S-adenosylmethionine, a key metabolite for cell function, and provides 50% of the cysteine needed for hepatic glutathione synthesis. The route requires the intake of essential nutrients (e.g. methionine, vitamins) and is regulated by their availability. Transsulfuration presents multiple interconnections with epigenetics, ATP and glutathione synthesis, polyol and pentose phosphate pathways and detoxification that rely mostly in the exchange of substrates or products...
November 30, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29173981/glucocerebrosidase-haploinsufficiency-in-a53t-%C3%AE-synuclein-mice-impacts-disease-onset-and-course
#8
Nahid Tayebi, Loukia Parisiadou, Bahafta Berhe, Ashley N Gonzalez, Jenny Serra-Vinardell, Raphael J Tamargo, Emerson Maniwang, Zachary Sorrentino, Hideji Fujiwara, Richard J Grey, Shahzeb Hassan, Yotam N Blech-Hermoni, Chuyu Chen, Ryan McGlinchey, Chrissy Makariou-Pikis, Mieu Brooks, Edward I Ginns, Daniel S Ory, Benoit I Giasson, Ellen Sidransky
Mutations in GBA1 encountered in Gaucher disease are a leading risk factor for Parkinson disease and associated Lewy body disorders. Many GBA1 mutation carriers, especially those with severe or null GBA1 alleles, have earlier and more progressive parkinsonism. To model the effect of partial glucocerebrosidase deficiency on neurological progression in vivo, mice with a human A53T α-synuclein (SNCAA53T) transgene were crossed with heterozygous null gba mice (gba+/-). Survival analysis of 84 mice showed that in gba+/-//SNCAA53T hemizygotes and homozygotes, the symptom onset was significantly earlier than in gba+/+//SNCAA53T mice (p-values 0...
November 21, 2017: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/29136215/multitaskprotdb-ii-an-update-of-a-database-of-multitasking-moonlighting-proteins
#9
Luís Franco-Serrano, Sergio Hernández, Alejandra Calvo, María A Severi, Gabriela Ferragut, JosepAntoni Pérez-Pons, Jaume Piñol, Òscar Pich, Ángel Mozo-Villarias, Isaac Amela, Enrique Querol, Juan Cedano
Multitasking, or moonlighting, is the capability of some proteins to execute two or more biological functions. MultitaskProtDB-II is a database of multifunctional proteins that has been updated. In the previous version, the information contained was: NCBI and UniProt accession numbers, canonical and additional biological functions, organism, monomeric/oligomeric states, PDB codes and bibliographic references. In the present update, the number of entries has been increased from 288 to 694 moonlighting proteins...
November 9, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29127264/protein-moonlighting-revealed-by-non-catalytic-phenotypes-of-yeast-enzymes
#10
Adriana Espinosa-Cantú, Diana Ascencio, Selene Herrera-Basurto, Jiewei Xu, Assen Roguev, Nevan J Krogan, Alexander DeLuna
A single gene can partake in several biological processes, and therefore gene deletions can lead to different-sometimes unexpected-phenotypes. However, it is not always clear whether such pleiotropy reflects the loss of a unique molecular activity involved in different processes or the loss of a multifunctional protein. Here, using Saccharomyces cerevisiae metabolism as a model, we systematically test the null hypothesis that enzyme phenotypes depend on a single annotated molecular function, namely their catalysis...
November 10, 2017: Genetics
https://www.readbyqxmd.com/read/29126295/moonprot-2-0-an-expansion-and-update-of-the-moonlighting-proteins-database
#11
Chang Chen, Shadi Zabad, Haipeng Liu, Wangfei Wang, Constance Jeffery
MoonProt 2.0 (http://moonlightingproteins.org) is an updated, comprehensive and open-access database storing expert-curated annotations for moonlighting proteins. Moonlighting proteins contain two or more physiologically relevant distinct functions performed by a single polypeptide chain. Here, we describe developments in the MoonProt website and database since our previous report in the Database Issue of Nucleic Acids Research. For this V 2.0 release, we expanded the number of proteins annotated to 370 and modified several dozen protein annotations with additional or updated information, including more links to protein structures in the Protein Data Bank, compared with the previous release...
November 6, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29123048/cell-cycle-proteins-moonlight-in-multiciliogenesis
#12
Michelle Levine, Andrew Holland
No abstract text is available yet for this article.
November 10, 2017: Science
https://www.readbyqxmd.com/read/29117147/the-na-k-atpase-%C3%AE-subunit-isoforms-expression-in-glioblastoma-multiforme-moonlighting-roles
#13
Deborah Rotoli, Mariana-Mayela Cejas, María-Del-Carmen Maeso, Natalia-Dolores Pérez-Rodríguez, Manuel Morales, Julio Ávila, Ali Mobasheri, Pablo Martín-Vasallo
Glioblastoma multiforme (GBM) is the most common form of malignant glioma. Recent studies point out that gliomas exploit ion channels and transporters, including Na, K-ATPase, to sustain their singular growth and invasion as they invade the brain parenchyma. Moreover, the different isoforms of the β-subunit of Na, K-ATPase have been implicated in regulating cellular dynamics, particularly during cancer progression. The aim of this study was to determine the Na, K-ATPase β subunit isoform subcellular expression patterns in all cell types responsible for microenvironment heterogeneity of GBM using immunohistochemical analysis...
November 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29113626/moonlighting-proteins-nature-s-swiss-army-knives
#14
(no author information available yet)
No abstract text is available yet for this article.
November 7, 2017: Science Progress
https://www.readbyqxmd.com/read/29095812/moonlighting-newborn-screening-markers-the-incidental-discovery-of-a-second-tier-test-for-pompe-disease
#15
Silvia Tortorelli, Jason S Eckerman, Joseph J Orsini, Colleen Stevens, Jeremy Hart, Patricia L Hall, John J Alexander, Dimitar Gavrilov, Devin Oglesbee, Kimiyo Raymond, Dietrich Matern, Piero Rinaldo
PurposeTo describe a novel biochemical marker in dried blood spots suitable to improve the specificity of newborn screening for Pompe disease.MethodsThe new marker is a ratio calculated between the creatine/creatinine (Cre/Crn) ratio as the numerator and the activity of acid α-glucosidase (GAA) as the denominator. Using Collaborative Laboratory Integrated Reports (CLIR), the new marker was incorporated in a dual scatter plot that can achieve almost complete segregation between Pompe disease and false-positive cases...
November 2, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/29090212/metabolism-of-citrate-and-other-carboxylic-acids-in-erythrocytes-as-a-function-of-oxygen-saturation-and-refrigerated-storage
#16
Travis Nemkov, Kaiqi Sun, Julie A Reisz, Tatsuro Yoshida, Andrew Dunham, Edward Y Wen, Alexander Q Wen, Rob C Roach, Kirk C Hansen, Yang Xia, Angelo D'Alessandro
State-of-the-art proteomics technologies have recently helped to elucidate the unanticipated complexity of red blood cell metabolism. One recent example is citrate metabolism, which is catalyzed by cytosolic isoforms of Krebs cycle enzymes that are present and active in mature erythrocytes and was determined using quantitative metabolic flux analysis. In previous studies, we reported significant increases in glycolytic fluxes in red blood cells exposed to hypoxia in vitro or in vivo, an observation relevant to transfusion medicine owing to the potential benefits associated with hypoxic storage of packed red blood cells...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/29083920/heightened-dynamics-of-the-oxidized-y48h-variant-of-human-cytochrome-c-increases-its-peroxidatic-activity
#17
Oliver M Deacon, Andreas Ioannis Karsisiotis, Tadeo Moreno-Chicano, Michael A Hough, Colin Macdonald, Tharin M A Blumenschein, Michael T Wilson, Geoffrey R Moore, Jonathan A R Worrall
Proteins performing multiple biochemical functions are called "moonlighting proteins" or extreme multifunctional (EMF) proteins. Mitochondrial cytochrome c is an EMF protein that binds multiple partner proteins to act as a signaling molecule, transfers electrons in the respiratory chain, and acts as a peroxidase in apoptosis. Mutations in the cytochrome c gene lead to the disease thrombocytopenia, which is accompanied by enhanced apoptotic activity. The Y48H variant arises from one such mutation and is found in the 40-57 Ω-loop, the lowest-unfolding free energy substructure of the cytochrome c fold...
November 8, 2017: Biochemistry
https://www.readbyqxmd.com/read/29061666/suppression-of-a-thermosensitive-zipa-cell-division-mutant-by-altering-amino-acid-metabolism
#18
Daniel Vega Mendoza, William Margolin
ZipA is essential for cell division in Escherichia coli, acting early in the process to anchor polymers of FtsZ to the cytoplasmic membrane. Along with FtsA, FtsZ and ZipA form a proto-ring at midcell that recruits additional proteins to eventually build the division septum. Cells carrying the thermosensitive zipA1 allele divide fairly normally at 30°C in rich medium but cease dividing at temperatures above 34°C, forming long filaments. In a search for suppressors of zipA1, we found that deletions of specific genes involved in amino acid biosynthesis could partially cell rescue growth and division at 34°C or 37°C, but not at 42°C...
October 23, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/29056428/a-lipoylated-metabolic-protein-released-by-staphylococcus-aureus-suppresses-macrophage-activation
#19
James P Grayczyk, Cameron J Harvey, Irina Laczkovich, Francis Alonzo
The virulence factors of pathogenic microbes often have single functions that permit immune suppression. However, a proportion possess multiple activities and are considered moonlighting proteins. By examining secreted virulence factors of Staphylococcus aureus, we determine that the bacterial lipoic acid synthetase LipA suppresses macrophage activation. LipA is known to modify the E2 subunit of the metabolic enzyme complex pyruvate dehydrogenase (E2-PDH) with a fatty acid derivative, lipoic acid, yielding the metabolic protein lipoyl-E2-PDH...
November 8, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/29034753/ataxia-telangiectasia-syndrome-moonlighting-atm
#20
Majid Zaki-Dizaji, Seyed Mohammad Akrami, Hassan Abolhassani, Nima Rezaei, Asghar Aghamohammadi
Ataxia-telangiectasia (A-T) a multisystem disorder primarily characterized by cerebellar degeneration, telangiectasia, immunodeficiency, cancer susceptibility and radiation sensitivity. Identification of the gene defective in this syndrome, ataxia-telangiectasia mutated gene (ATM), and further characterization of the disorder together with a greater insight into the function of the ATM protein have expanded our knowledge about the molecular pathogenesis of this disease. Area covered: In this review, we have attempted to summarize the different roles of ATM signaling that have provided new insights into the diverse clinical phenotypes exhibited by A-T patients...
December 2017: Expert Review of Clinical Immunology
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