List of Primers Used in Qrt-PCR
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Inorganic Polyphosphate in Mammals: Where’S
Biochemical Society Transactions (2020) https://doi.org/10.1042/BST20190328 Review Article Inorganic polyphosphate in mammals: where’s Wally? Downloaded from https://portlandpress.com/biochemsoctrans/article-pdf/doi/10.1042/BST20190328/867675/bst-2019-0328c.pdf by University College London (UCL) user on 19 February 2020 Yann Desfougères, Adolfo Saiardi and Cristina Azevedo Medical Research Council Laboratory for Molecular Cell Biology, University College London, London, U.K. Correspondence: Adolfo Saiardi ([email protected]) Inorganic polyphosphate (polyP) is a ubiquitous polymer of tens to hundreds of ortho- phosphate residues linked by high-energy phosphoanhydride bonds. In prokaryotes and lower eukaryotes, both the presence of polyP and of the biosynthetic pathway that leads to its synthesis are well-documented. However, in mammals, polyP is more elusive. Firstly, the mammalian enzyme responsible for the synthesis of this linear biopolymer is unknown. Secondly, the low sensitivity and specificity of available polyP detection methods make it difficult to confidently ascertain polyP presence in mammalian cells, since in higher eukaryotes, polyP exists in lower amounts than in yeast or bacteria. Despite this, polyP has been given a remarkably large number of functions in mammals. In this review, we discuss some of the proposed functions of polyP in mammals, the lim- itations of the current detection methods and the urgent need to understand how this polymer is synthesized. Introduction Arthur Kornberg and Igor Kulaev spent a large part of their careers working on inorganic polyphos- phate (polyP). Convinced of the fundamental importance of this ‘forgotten polymer’, they and their teams developed tools to study polyP in a wide range of organisms from bacteria to mammals [1,2]. -
In Vivo Mapping of a GPCR Interactome Using Knockin Mice
In vivo mapping of a GPCR interactome using knockin mice Jade Degrandmaisona,b,c,d,e,1, Khaled Abdallahb,c,d,1, Véronique Blaisb,c,d, Samuel Géniera,c,d, Marie-Pier Lalumièrea,c,d, Francis Bergeronb,c,d,e, Catherine M. Cahillf,g,h, Jim Boulterf,g,h, Christine L. Lavoieb,c,d,i, Jean-Luc Parenta,c,d,i,2, and Louis Gendronb,c,d,i,j,k,2 aDépartement de Médecine, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; bDépartement de Pharmacologie–Physiologie, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; cFaculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; dCentre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; eQuebec Network of Junior Pain Investigators, Sherbrooke, QC J1H 5N4, Canada; fDepartment of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA 90095; gSemel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, CA 90095; hShirley and Stefan Hatos Center for Neuropharmacology, University of California, Los Angeles, CA 90095; iInstitut de Pharmacologie de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; jDépartement d’Anesthésiologie, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; and kQuebec Pain Research Network, Sherbrooke, QC J1H 5N4, Canada Edited by Brian K. Kobilka, Stanford University School of Medicine, Stanford, CA, and approved April 9, 2020 (received for review October 16, 2019) With over 30% of current medications targeting this family of attenuates pain hypersensitivities in several chronic pain models proteins, G-protein–coupled receptors (GPCRs) remain invaluable including neuropathic, inflammatory, diabetic, and cancer pain therapeutic targets. -
Caveolae and Cancer: a New Mechanical Perspective
Special Edition 367 Caveolae and Cancer: A New Mechanical Perspective Christophe Lamaze1,2,3, Stéphanie Torrino1,2,3 Caveolae are small invaginations of the plasma membrane in cells. In addition to their classically described functions in cell signaling and membrane trafficking, it was recently shown that caveolae act also as plasma membrane sensors that respond immediately to acute mechanical stresses. Caveolin 1 (Cav1), the main component of caveolae, is a multifunctional scaffolding protein that can remodel the extracellular environment. Caveolae dysfunction, due to mutations in caveolins, has been linked to several human diseases called “caveolinopathies,” including muscular dystrophies, cardiac disease, infection, osteoporosis, and cancer. The role of caveolae and/or Cav1 remains controversial particularly in tumor progression. Cav1 function has been associated with several steps of cancerogenesis such as tumor growth, cell migration, metastasis, and angiogenesis, yet it was observed that Cav1 could affect these steps in a Dr. Christophe Lamaze positive or negative manner. Here, we discuss the possible function of caveolae and Cav1 in tumor progression in the context of their recently discovered role in cell mechanics. (Biomed J 2015;38:367-379) Key words: cancer, caveolae, caveolin, cavin, mechanics aveolae (for “little caves”) are small (50–100 nm) caveolins may control intracellular signaling.[8] Cplasma membrane invaginations discovered by electron The modulation of cell signaling by caveolae and/or Cav1 microscopy in 1953.[1] Caveolin (Cav) and Cavin proteins are could be one of the mechanisms by which caveolae play a the key components of caveolae that are enriched in glyco‑ role in cell transformation and tumor progression. -
Ppn2, a Novel Zn2+-Dependent Polyphosphatase in the Acidocalcisome-Like Yeast Vacuole Rūta Gerasimaitėand Andreas Mayer*
© 2017. Published by The Company of Biologists Ltd | Journal of Cell Science (2017) 130, 1625-1636 doi:10.1242/jcs.201061 RESEARCH ARTICLE Ppn2, a novel Zn2+-dependent polyphosphatase in the acidocalcisome-like yeast vacuole Rūta Gerasimaitėand Andreas Mayer* ABSTRACT metabolism of the cell and polyP is used by the cells as a Pi reserve Acidocalcisome-like organelles are found in all kingdoms of life. Many and in phosphorylation and polyphosphorylation reactions of their functions, such as the accumulation and storage of metal (Azevedo et al., 2015; Livermore et al., 2016; Nocek et al., 2008; ions, nitrogen and phosphate, the activation of blood clotting and Rao et al., 2009). PolyP is important in detoxification of heavy inflammation, depend on the controlled synthesis and turnover of metals and in counteracting alkaline and osmotic stress (Keasling, polyphosphate (polyP), a polymer of inorganic phosphate linked 1997; Pick and Weiss, 1991; Rohloff and Docampo, 2008). In by phosphoric anhydride bonds. The exploration of the role of addition, infectivity and persistence of prokaryotic and eukaryotic acidocalcisomes in metabolism and physiology requires the parasites depend on their polyP stores (Galizzi et al., 2013; Kim manipulation of polyP turnover, yet the complete set of proteins et al., 2002; Lander et al., 2013). The ability of polyP to stabilize responsible for this turnover is unknown. Here, we identify a novel proteins and act as a chaperone increases stress tolerance of cells type of polyphosphatase operating in the acidocalcisome-like (Azevedo et al., 2015; Dahl et al., 2015; Gray et al., 2014). vacuoles of the yeast Saccharomyces cerevisiae, which we called Mammalian cells contain much lower polyP levels compared to Ppn2. -
Sumoylation of EHD3 Modulates Tubulation of the Endocytic Recycling Compartment
RESEARCH ARTICLE SUMOylation of EHD3 Modulates Tubulation of the Endocytic Recycling Compartment Or Cabasso☯, Olga Pekar☯¤, Mia Horowitz* Department of Cell Research and Immunology, Tel Aviv University, Ramat Aviv, Israel ☯ These authors contributed equally to this work. ¤ Current address: Skirball Institute of Biomolecular Medicine, New York University, New York New York, United States of America * [email protected] Abstract Endocytosis defines the entry of molecules or macromolecules through the plasma mem- brane as well as membrane trafficking in the cell. It depends on a large number of proteins that undergo protein-protein and protein-phospholipid interactions. EH Domain containing (EHDs) proteins formulate a family, whose members participate in different stages of endo- cytosis. Of the four mammalian EHDs (EHD1-EHD4) EHD1 and EHD3 control traffic to the endocytic recycling compartment (ERC) and from the ERC to the plasma membrane, while EHD2 modulates internalization. Recently, we have shown that EHD2 undergoes SUMOylation, which facilitates its exit from the nucleus, where it serves as a co-repressor. OPEN ACCESS In the present study, we tested whether EHD3 undergoes SUMOylation and what is its role Citation: Cabasso O, Pekar O, Horowitz M (2015) in endocytic recycling. We show, both in-vitro and in cell culture, that EHD3 undergoes SUMOylation of EHD3 Modulates Tubulation of the Endocytic Recycling Compartment. PLoS ONE 10(7): SUMOylation. Localization of EHD3 to the tubular structures of the ERC depends on its e0134053. doi:10.1371/journal.pone.0134053 SUMOylation on lysines 315 and 511. Absence of SUMOylation of EHD3 has no effect on Editor: Xiaochen Wang, National Institute of its dimerization, an important factor in membrane localization of EHD3, but has a dominant Biological Sciences, Beijing, CHINA negative effect on its appearance in tubular ERC structures. -
Inorganic Polyphosphate in Mammals: Where’S Wally?
Biochemical Society Transactions (2020) 48 95–101 https://doi.org/10.1042/BST20190328 Review Article Inorganic polyphosphate in mammals: where’s Wally? Yann Desfougères, Adolfo Saiardi and Cristina Azevedo Medical Research Council Laboratory for Molecular Cell Biology, University College London, London, U.K. Correspondence: Adolfo Saiardi ([email protected]) Inorganic polyphosphate (polyP) is a ubiquitous polymer of tens to hundreds of ortho- phosphate residues linked by high-energy phosphoanhydride bonds. In prokaryotes and lower eukaryotes, both the presence of polyP and of the biosynthetic pathway that leads to its synthesis are well-documented. However, in mammals, polyP is more elusive. Firstly, the mammalian enzyme responsible for the synthesis of this linear biopolymer is unknown. Secondly, the low sensitivity and specificity of available polyP detection methods make it difficult to confidently ascertain polyP presence in mammalian cells, since in higher eukaryotes, polyP exists in lower amounts than in yeast or bacteria. Despite this, polyP has been given a remarkably large number of functions in mammals. In this review, we discuss some of the proposed functions of polyP in mammals, the lim- itations of the current detection methods and the urgent need to understand how this polymer is synthesized. Introduction Arthur Kornberg and Igor Kulaev spent a large part of their careers working on inorganic polyphos- phate (polyP). Convinced of the fundamental importance of this ‘forgotten polymer’, they and their teams developed tools to study polyP in a wide range of organisms from bacteria to mammals [1,2]. Today, polyP is recognized as a molecule of many and important functions. The large spectrum of activities in medically relevant contexts have made polyP a highly promising target for therapeutic applications. -
Retrograde Trafficking of AB5 Toxins: Mechanisms to Therapeutics
J Mol Med DOI 10.1007/s00109-013-1048-7 REVIEW Retrograde trafficking of AB5 toxins: mechanisms to therapeutics Somshuvra Mukhopadhyay & Adam D. Linstedt Received: 1 April 2013 /Revised: 23 April 2013 /Accepted: 24 April 2013 # Springer-Verlag Berlin Heidelberg 2013 Abstract Bacterial AB5 toxins are a clinically relevant class and epidemic diarrhea; and pertussis toxin (PTx), which is the of exotoxins that include several well-known members such causative agent for whooping cough [1, 2]. Each year, infec- as Shiga, cholera, and pertussis toxins. Infections with toxin- tions with these toxin-producing bacteria affect millions of producing bacteria cause devastating human diseases that individuals and cause more than a million deaths [1]. affect millions of individuals each year and have no definitive AB5 toxins are so-called because they are formed by the medical treatment. The molecular targets of AB5 toxins reside association of a single A subunit with a pentameric B subunit in the cytosol of infected cells, and the toxins reach the cytosol (Fig. 1)[1, 2]. The toxins exert their cytotoxic effect by by trafficking through the retrograde membrane transport altering the activity of specific molecular targets in the cytosol pathway that avoids degradative late endosomes and lyso- of infected cells. STx blocks protein synthesis by removing a somes. Focusing on Shiga toxin as the archetype member, single adenine residue from the 28S ribosomal RNA, and CTx we review recent advances in understanding the molecular and PTx increase cAMP levels by ADP-ribosylating the Gsα mechanisms involved in the retrograde trafficking of AB5 or Giα components of heterotrimeric G proteins, respectively toxins and highlight how these basic science advances are [1, 2]. -
12) United States Patent (10
US007635572B2 (12) UnitedO States Patent (10) Patent No.: US 7,635,572 B2 Zhou et al. (45) Date of Patent: Dec. 22, 2009 (54) METHODS FOR CONDUCTING ASSAYS FOR 5,506,121 A 4/1996 Skerra et al. ENZYME ACTIVITY ON PROTEIN 5,510,270 A 4/1996 Fodor et al. MICROARRAYS 5,512,492 A 4/1996 Herron et al. 5,516,635 A 5/1996 Ekins et al. (75) Inventors: Fang X. Zhou, New Haven, CT (US); 5,532,128 A 7/1996 Eggers Barry Schweitzer, Cheshire, CT (US) 5,538,897 A 7/1996 Yates, III et al. s s 5,541,070 A 7/1996 Kauvar (73) Assignee: Life Technologies Corporation, .. S.E. al Carlsbad, CA (US) 5,585,069 A 12/1996 Zanzucchi et al. 5,585,639 A 12/1996 Dorsel et al. (*) Notice: Subject to any disclaimer, the term of this 5,593,838 A 1/1997 Zanzucchi et al. patent is extended or adjusted under 35 5,605,662 A 2f1997 Heller et al. U.S.C. 154(b) by 0 days. 5,620,850 A 4/1997 Bamdad et al. 5,624,711 A 4/1997 Sundberg et al. (21) Appl. No.: 10/865,431 5,627,369 A 5/1997 Vestal et al. 5,629,213 A 5/1997 Kornguth et al. (22) Filed: Jun. 9, 2004 (Continued) (65) Prior Publication Data FOREIGN PATENT DOCUMENTS US 2005/O118665 A1 Jun. 2, 2005 EP 596421 10, 1993 EP 0619321 12/1994 (51) Int. Cl. EP O664452 7, 1995 CI2O 1/50 (2006.01) EP O818467 1, 1998 (52) U.S. -
Communities and Homology in Protein-Protein Interactions
Communities and Homology in Protein-protein Interactions Anna Lewis Balliol College University of Oxford A thesis submitted for the degree of Doctor of Philosophy Michaelmas 2011 2 3 This thesis is dedicated to the inspirational Jen Weterings. Wishing her well in her ongoing recovery. Acknowledgements With thanks to Charlotte, Nick and Mason, for being the best supervisors a girl could ask for. With thanks to all those who have helped me with the work in this thesis. In particular Sumeet Agarwal, Rebecca Hamer, Gesine Reinert, James Wakefield, Simon Myers, Steve Kelly, Nicholas Lewis, members of the Oxford Protein Informatics Group and members of the Oxford/Imperial Systems and Signalling group. With thanks to all those who have made my DPhil years a wonderful experience, in particular my family, my Balliol family, and my DTC family. Abstract Knowledge of protein sequences has exploded, but knowledge of protein function is needed to make use of sequence information, and this lags behind. A protein’s function must be understood in context and part of this is the network of interactions between proteins. What are the relationships between protein function and the structure of the interaction network? In the first part of my thesis, I investigate the functional relevance of clusters, or communities, of proteins in the yeast protein interaction network. Communities are candidates for biological modules. The work I present is the first to systematically investigate this structure at multiple scales in such networks. I develop novel tests to assess whether communities are functionally homogeneous, and demonstrate that almost every protein is found in a functionally homogeneous community at some scale. -
Membrane Trafficking in the Yeast Saccharomyces Cerevisiae Model
Int. J. Mol. Sci. 2015, 16, 1509-1525; doi:10.3390/ijms16011509 OPEN ACCESS International Journal of Molecular Sciences ISSN 1422-0067 www.mdpi.com/journal/ijms Review Membrane Trafficking in the Yeast Saccharomyces cerevisiae Model Serge Feyder, Johan-Owen De Craene, Séverine Bär, Dimitri L. Bertazzi and Sylvie Friant * Department of Molecular and Cellular Genetics, UMR7156, Université de Strasbourg and CNRS, 21 rue Descartes, Strasbourg 67084, France; E-Mails: [email protected] (S.F.); [email protected] (J.-O.D.C.); [email protected] (S.B.); [email protected] (D.L.B.) * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +33-368-851-360. Academic Editor: Jeremy C. Simpson Received: 14 October 2014 / Accepted: 19 December 2014 / Published: 9 January 2015 Abstract: The yeast Saccharomyces cerevisiae is one of the best characterized eukaryotic models. The secretory pathway was the first trafficking pathway clearly understood mainly thanks to the work done in the laboratory of Randy Schekman in the 1980s. They have isolated yeast sec mutants unable to secrete an extracellular enzyme and these SEC genes were identified as encoding key effectors of the secretory machinery. For this work, the 2013 Nobel Prize in Physiology and Medicine has been awarded to Randy Schekman; the prize is shared with James Rothman and Thomas Südhof. Here, we present the different trafficking pathways of yeast S. cerevisiae. At the Golgi apparatus newly synthesized proteins are sorted between those transported to the plasma membrane (PM), or the external medium, via the exocytosis or secretory pathway (SEC), and those targeted to the vacuole either through endosomes (vacuolar protein sorting or VPS pathway) or directly (alkaline phosphatase or ALP pathway). -
Page 1 of 11 Enzymes of Yeast Polyphosphate Metabolism
Enzymes of yeast polyphosphate metabolism: structure, enzymology and biological roles Rūta Gerasimaitė and Andreas Mayer Department of Biochemistry, University of Lausanne, Ch. des Boveresses 155, 1066 Epalinges, Switzerland Corresponding author: Andreas Mayer Keywords: inorganic polyphosphate, exopolyphosphatase, endopolyphosphatase, polyP polymerase, VTC complex, yeast vacuole Page 1 of 11 Abstract Inorganic polyphosphate (polyP) is found in all living organisms. The known polyP functions in eukaryotes range from osmoregulation and virulence in parasitic protozoa to modulating blood coagulation, inflammation, bone mineralization and cellular signaling in mammals. However mechanisms of regulation and even the identity of involved proteins in many cases remain obscure. Most of the insights obtained so far stem from studies in the yeast Saccharomyces cerevisiae. Here, we provide a short overview of the properties and functions of known yeast polyP metabolism enzymes and discuss future directions for polyP research. Page 2 of 11 Introduction Inorganic polyphosphate (polyP) is found in all kingdoms of life. Due to its simple chemical structure, the possibility to be synthesized abiotically, and its ubiquitous presence, polyP has been declared a “molecular” fossil, a relic of the ancient prebiotic world, which is mostly exploited by freely-living microorganisms for phosphate storage and metal chelation [1]. However, during the past several years, many exciting functions of cellular polyP in the mammals have been described. PolyP regulates bone calcification and is involved in activating the blood clotting cascade, inflammatory responses and various events of cellular signalling [2-5]. Understanding the molecular mechanisms of eukaryotic polyP synthesis and degradation appears crucial for further characterization of these intriguing activities of polyP. -
EHD4) in the Kidney
University of Nebraska Medical Center DigitalCommons@UNMC Theses & Dissertations Graduate Studies Spring 5-5-2018 Role of EPS15 Homology Domain-Containing Protein 4 (EHD4) in the Kidney Shamma Rahman University of Nebraska Medical Center Follow this and additional works at: https://digitalcommons.unmc.edu/etd Part of the Cellular and Molecular Physiology Commons, and the Systems and Integrative Physiology Commons Recommended Citation Rahman, Shamma, "Role of EPS15 Homology Domain-Containing Protein 4 (EHD4) in the Kidney" (2018). Theses & Dissertations. 253. https://digitalcommons.unmc.edu/etd/253 This Dissertation is brought to you for free and open access by the Graduate Studies at DigitalCommons@UNMC. It has been accepted for inclusion in Theses & Dissertations by an authorized administrator of DigitalCommons@UNMC. For more information, please contact [email protected]. ROLE OF EPS15 HOMOLOGY DOMAIN-CONTAINING PROTEIN 4 (EHD4) IN THE KIDNEY by Shamma S. Rahman A DISSERTATION Presented to the Faculty of the University of Nebraska Graduate College in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Cellular & Integrative Physiology Graduate Program Under the Supervision of Assistant Professor Erika I. Boesen University of Nebraska Medical Center Omaha, Nebraska January, 2018 Supervisory Committee: Steven Sansom, Ph.D. Hamid Band, M.D., Ph.D. Kaushik P. Patel, Ph.D. i ACKNOWLEDGEMENTS When I started my journey in the “awe-inspiring” world of graduate studies, I never imagined that I would end up in a kidney lab. I had almost no previous knowledge about the complexity of renal physiology, let alone working with animal models. I am extremely fortunate that I found Dr.