Peptide Chemistry up to Its Present State
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Amylase Release from Rat Parotid Gland Slices C.L
Br. J. P!harmnic. (1981) 73, 517-523 THE EFFECTS OF SUBSTANCE P AND RELATED PEPTIDES ON a- AMYLASE RELEASE FROM RAT PAROTID GLAND SLICES C.L. BROWN & M.R. HANLEY MRC Neurochemical Pharmacology Unit, Medical Research Council Centre, Medical School, Hills Road, Cambridge CB2 2QH 1 The effects of substance P and related peptides on amylase release from rat parotid gland slices have been investigated. 2 Supramaximal concentrations (1 F.M) of substance P caused enhancement of amylase release over the basal level within 1 min; this lasted for at least 40 min at 30°C. 3 Substance P-stimulated amylase release was partially dependent on extracellular calcium and could be inhibited by 50% upon removal of extracellular calcium. 4 Substance P stimulated amylase release in a dose-dependent manner with an ED50 of 18 nm. 5 All C-terminal fragments of substance P were less potent than substance P in stimulating amylase release. The C-terminal hexapeptide of substance P was the minimum structure for potent activity in this system, having 1/3 to 1/8 the potency of substance P. There was a dramatic drop in potency for the C-terminal pentapeptide of substance P or substance P free acid. Physalaemin was more potent than substance P (ED50 = 7 nM), eledoisin was about equipotent with substance P (ED5o = 17 nM), and kassinin less potent than substance P (ED50 = 150 nM). 6 The structure-activity profile observed is very similar to that for stimulation of salivation in vivo, indicating that the same receptors are involved in mediating these responses. -
Peter P. T. Sah and the Synthesis of Vitamin C in China and Europe
EASTM 20 (2003 ): 92-98 Peter P. T. Sah and the Synthesis of Vitamin C in China and Europe Zhang Li [Zhang Li is Associate Professor at the Institute for the History of Natural Sci ence, Chinese Academy of Sciences. She has published a number of articles on the history of modern chemistry of both the West and China and the social his tory of science in twentieth-century China, including studies on the influence of higher education reform on chemical education in the 1950s in China (1992) and the coordination between national needs and scientists' autonomy during 1949-/965 (2003). She recently received her doctoral degree in the Philosophy of Science from Peking University, completing a dissertation on the institution alization of science in the People's Republic of China. Her forthcoming book is called Gaofenzi kexue zai Zhongguo de jianli ( 1949-1965) r%'J 5t r f-4 ~ ft i:p 00 R"J ~ JI. (1949-1965) ( Institutionalization of Polymer Science in China(l949- /965) Jinan: Shandong jiaoyu chubanshe 2003, ¥ff 1¥i : W J'.f: ¥!I.. W tB It& ffr±, 2003).J * * * The synthesis of vitamin C was one of the main scientific achievements in the 1930s. Many scientists in Europe made contributions to this field, especially Albert Szent-Gyorgyi (1893-1986) from Hungary and Sir Walter Norman Ha worth ( 1883-1950) from England, both of whom won the Nobel Prize in 1937. In the same period, a Chinese chemist, Sa Bentie ~ :;$: ~ (1900-1986), better known outside China as Peter P. T. Sah, was also studying vitamin C. -
Selective and Specific Ion Binding on Proteins at Physiologically-Relevant
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Elsevier - Publisher Connector FEBS Letters 585 (2011) 3126–3132 journal homepage: www.FEBSLetters.org Selective and specific ion binding on proteins at physiologically-relevant concentrations ⇑ Linlin Miao a, Haina Qin a, Patrice Koehl a,b, Jianxing Song a,c, a Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore b Department of Computer Science and Genome Center, University of California, Davis, CA 95616, USA c Department of Biochemistry, Yong Loo Lin School of Medicine and National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore article info abstract Article history: Insoluble proteins dissolved in unsalted water appear to have no well-folded tertiary structures. Received 30 July 2011 This raises a fundamental question as to whether being unstructured is due to the absence of salt Revised 25 August 2011 ions. To address this issue, we solubilized the insoluble ephrin-B2 cytoplasmic domain in unsalted Accepted 29 August 2011 water and first confirmed using NMR spectroscopy that it is only partially folded. Using NMR HSQC Available online 6 September 2011 titrations with 14 different salts, we further demonstrate that the addition of salt triggers no signif- Edited by Miguel De la Rosa icant folding of the protein within physiologically relevant ion concentrations. We reveal however that their 8 anions bind to the ephrin-B2 protein with high affinity and specificity at biologically-rel- evant concentrations. Interestingly, the binding is found to be both salt- and residue-specific. Keywords: Insoluble protein Ó 2011 Federation of European Biochemical Societies. -
Identification of a Novel Vasodilatory Octapeptide from the Skin Secretion
molecules Article Identification of a Novel Vasodilatory Octapeptide from the Skin Secretion of the African Hyperoliid Frog, Kassina senegalensis Qiang Du 1,†, Hui Wang 1,*,†, Chengbang Ma 2, Yue Wu 2, Xinping Xi 2,*, Mei Zhou 2 ID , Tianbao Chen 2 ID , Chris Shaw 2 and Lei Wang 2 1 School of Pharmacy, China Medical University, Shenyang 110001, Liaoning, China; [email protected] 2 Natural Drug Discovery Group, School of Pharmacy, Queen’s University, Belfast BT9 7BL, Northern Ireland, UK; [email protected] (C.M.); [email protected] (Y.W.); [email protected] (M.Z.); [email protected] (T.C.); [email protected] (C.S.); [email protected] (L.W.) * Correspondence: [email protected] (H.W.); [email protected] (X.X.); Tel.: +86-24-2325-6666 (H.W.); +44-28-9097-2200 (X.X.); Fax: +86-2325-5471 (H.W.); +44-28-9094-7794 (X.X.) † These authors contributed equally to this work. Received: 5 July 2017; Accepted: 19 July 2017; Published: 19 July 2017 Abstract: The defensive skin secretions of amphibians continue to be an excellent source of novel biologically-active peptides. Here we report the identification and pharmacological activity of a novel C-terminally amided myotropic octapeptide from the skin secretion of the African hyperoliid frog, Kassina senegalensis. The 8-amino acid peptide has the following primary structure: WMSLGWSL-amide and has a molecular mass of 978 Da. The primary structure and organisation of the biosynthetic precursor of WL-8 amide was successfully deduced from cloned skin secretion-derived cDNA. -
Novel Insulin Products: Why Would Patients, Professionals and Industry Want Them?
CURRENT TOPICS Novel insulin products: Why would patients, professionals and industry want them? VICKY STOKES, 1 KAVITHA SEBASTIAN ROZARIO, 2 JYOTHIS GEORGE 3 Abstract Zülzer, a physician from Berlin, published research into treating di - Multiple innovations over a century have improved the abetes with pancreatic extracts but, again, the Great War inter - safety, tolerability and clinical acceptability of insulin. From rupted research efforts. The latter efforts were in partnership with a therapeutic option that required multiple injections a day, a German company called Farbwerke Hoechst, whose successors often with a poor predictability, insulin has evolved into a developed another popular insulin almost a century later – insulin treatment approach that an empowered patient can self-ad - HOE901, now known as glargine. minister safely. It is the most potent glucose-lowering ther - Halfway across the world, Canadian orthopaedic surgeon, Fred - apy and has hence seen widespread clinical adoption in the erick Banting, and his medical student assistant, Charles Best, suc - last two decades in the treatment of type 2 diabetes. cessfully isolated insulin in 1921. Famously, this extract was first At the same time, the unit-costs of insulin have not declined tested on “Marjorie”, a dog with surgically induced diabetes, and as is often the case with long established therapies. We re - they managed to keep her alive all summer. After this initial success, view the history of insulin as a drug, charting its course from the head of the laboratory, Professor MacLeod, and his team helped early experiments to modern insulin therapies. We consider to refine the production (for example, using cows rather than dogs) the need (or lack thereof) for novel insulin from the perspec - tives of patients, healthcare professionals and healthcare and the purification of insulin. -
Curriculum Vitae Prof. Dr. Adolf Otto Reinhold Windaus
Curriculum Vitae Prof. Dr. Adolf Otto Reinhold Windaus Name: Adolf Otto Reinhold Windaus Lebensdaten: 25. Dezember 1876 - 9. Juni 1956 Adolf Windaus war ein deutscher Chemiker. Er untersuchte Naturstoffe, vor allem die biochemisch wichtigen Sterine und ihren Zusammenhang mit anderen Naturstoffen. Er entdeckte die chemische Verwandtschaft von Cholesterin und Gallensäure. Außerdem lieferte er Arbeiten über Vitamine, vor allem das Vitamin D. Zwischen 1927 und 1931 gelang ihm die Isolierung mehrerer D-Vitamine. Seine Forschungen bildeten die Grundlage für später von seinen Schülern durchgeführten Arbeiten über die menschlichen Sexualhormone. Für seine Verdienste um die Erforschung des Aufbaus der Sterine und ihres Zusammenhangs mit den Vitaminen wurde Adolf Windaus 1928 mit dem Nobelpreis für Chemie ausgezeichnet. Akademischer und beruflicher Werdegang Adolf Windaus begann 1895 ein Studium der Medizin an der Universität Freiburg. Er wechselte nach Berlin, wo er 1897 das Physikum bestand. 1899 wurde er in Freiburg mit einer Arbeit über Neue Beiträge zur Kenntnis der Digitalisstoffe promoviert wurde. 1901 war er zunächst in Berlin als Assistent von Emil Fischer (Nobelpreis für Chemie 1902) tätig. Während dieser Zeit wandte er sich zunehmend chemischen Fragestellungen zu. Außerdem begann er mit seinen Forschungen zu den Sterinen. 1903 habilitierte er sich in Freiburg mit einer Arbeit über Cholesterin. 1906 erhielt er eine außerordentliche Professur an der Universität Göttingen. Im Anschluss wechselte er für zwei Jahre an die Universität Innsbruck, wo er eine außerordentliche Professur für angewandte medizinische Chemie erhielt. 1915 ging er zurück nach Göttingen, wo er als Nachfolger von Otto Wallach (Nobelpreis für Chemie 1910) Ordinarius für Chemie wurde. Dort blieb er bis zu seiner Emeritierung im Jahr 1944. -
Cambridge's 92 Nobel Prize Winners Part 2 - 1951 to 1974: from Crick and Watson to Dorothy Hodgkin
Cambridge's 92 Nobel Prize winners part 2 - 1951 to 1974: from Crick and Watson to Dorothy Hodgkin By Cambridge News | Posted: January 18, 2016 By Adam Care The News has been rounding up all of Cambridge's 92 Nobel Laureates, celebrating over 100 years of scientific and social innovation. ADVERTISING In this installment we move from 1951 to 1974, a period which saw a host of dramatic breakthroughs, in biology, atomic science, the discovery of pulsars and theories of global trade. It's also a period which saw The Eagle pub come to national prominence and the appearance of the first female name in Cambridge University's long Nobel history. The Gender Pay Gap Sale! Shop Online to get 13.9% off From 8 - 11 March, get 13.9% off 1,000s of items, it highlights the pay gap between men & women in the UK. Shop the Gender Pay Gap Sale – now. Promoted by Oxfam 1. 1951 Ernest Walton, Trinity College: Nobel Prize in Physics, for using accelerated particles to study atomic nuclei 2. 1951 John Cockcroft, St John's / Churchill Colleges: Nobel Prize in Physics, for using accelerated particles to study atomic nuclei Walton and Cockcroft shared the 1951 physics prize after they famously 'split the atom' in Cambridge 1932, ushering in the nuclear age with their particle accelerator, the Cockcroft-Walton generator. In later years Walton returned to his native Ireland, as a fellow of Trinity College Dublin, while in 1951 Cockcroft became the first master of Churchill College, where he died 16 years later. 3. 1952 Archer Martin, Peterhouse: Nobel Prize in Chemistry, for developing partition chromatography 4. -
Field Guide to Common Macrofungi in Eastern Forests and Their Ecosystem Functions
United States Department of Field Guide to Agriculture Common Macrofungi Forest Service in Eastern Forests Northern Research Station and Their Ecosystem General Technical Report NRS-79 Functions Michael E. Ostry Neil A. Anderson Joseph G. O’Brien Cover Photos Front: Morel, Morchella esculenta. Photo by Neil A. Anderson, University of Minnesota. Back: Bear’s Head Tooth, Hericium coralloides. Photo by Michael E. Ostry, U.S. Forest Service. The Authors MICHAEL E. OSTRY, research plant pathologist, U.S. Forest Service, Northern Research Station, St. Paul, MN NEIL A. ANDERSON, professor emeritus, University of Minnesota, Department of Plant Pathology, St. Paul, MN JOSEPH G. O’BRIEN, plant pathologist, U.S. Forest Service, Forest Health Protection, St. Paul, MN Manuscript received for publication 23 April 2010 Published by: For additional copies: U.S. FOREST SERVICE U.S. Forest Service 11 CAMPUS BLVD SUITE 200 Publications Distribution NEWTOWN SQUARE PA 19073 359 Main Road Delaware, OH 43015-8640 April 2011 Fax: (740)368-0152 Visit our homepage at: http://www.nrs.fs.fed.us/ CONTENTS Introduction: About this Guide 1 Mushroom Basics 2 Aspen-Birch Ecosystem Mycorrhizal On the ground associated with tree roots Fly Agaric Amanita muscaria 8 Destroying Angel Amanita virosa, A. verna, A. bisporigera 9 The Omnipresent Laccaria Laccaria bicolor 10 Aspen Bolete Leccinum aurantiacum, L. insigne 11 Birch Bolete Leccinum scabrum 12 Saprophytic Litter and Wood Decay On wood Oyster Mushroom Pleurotus populinus (P. ostreatus) 13 Artist’s Conk Ganoderma applanatum -
Forest Fungi in Ireland
FOREST FUNGI IN IRELAND PAUL DOWDING and LOUIS SMITH COFORD, National Council for Forest Research and Development Arena House Arena Road Sandyford Dublin 18 Ireland Tel: + 353 1 2130725 Fax: + 353 1 2130611 © COFORD 2008 First published in 2008 by COFORD, National Council for Forest Research and Development, Dublin, Ireland. All rights reserved. No part of this publication may be reproduced, or stored in a retrieval system or transmitted in any form or by any means, electronic, electrostatic, magnetic tape, mechanical, photocopying recording or otherwise, without prior permission in writing from COFORD. All photographs and illustrations are the copyright of the authors unless otherwise indicated. ISBN 1 902696 62 X Title: Forest fungi in Ireland. Authors: Paul Dowding and Louis Smith Citation: Dowding, P. and Smith, L. 2008. Forest fungi in Ireland. COFORD, Dublin. The views and opinions expressed in this publication belong to the authors alone and do not necessarily reflect those of COFORD. i CONTENTS Foreword..................................................................................................................v Réamhfhocal...........................................................................................................vi Preface ....................................................................................................................vii Réamhrá................................................................................................................viii Acknowledgements...............................................................................................ix -
Peptide Synthesis: Chemical Or Enzymatic
Electronic Journal of Biotechnology ISSN: 0717-3458 Vol.10 No.2, Issue of April 15, 2007 © 2007 by Pontificia Universidad Católica de Valparaíso -- Chile Received June 6, 2006 / Accepted November 28, 2006 DOI: 10.2225/vol10-issue2-fulltext-13 REVIEW ARTICLE Peptide synthesis: chemical or enzymatic Fanny Guzmán Instituto de Biología Pontificia Universidad Católica de Valparaíso Avenida Brasil 2950 Valparaíso, Chile Fax: 56 32 212746 E-mail: [email protected] Sonia Barberis Facultad de Química, Bioquímica y Farmacia Universidad Nacional de San Luis Ejército de los Andes 950 (5700) San Luis, Argentina E-mail: [email protected] Andrés Illanes* Escuela de Ingeniería Bioquímica Pontificia Universidad Católica de Valparaíso Avenida Brasil 2147 Fax: 56 32 2273803 E-mail: [email protected] Financial support: This work was done within the framework of Project CYTED IV.22 Industrial Application of Proteolytic Enzymes from Higher Plants. Keywords: enzymatic synthesis, peptides, proteases, solid-phase synthesis. Abbreviations: CD: circular dichroism CLEC: cross linked enzyme crystals DDC: double dimer constructs ESI: electrospray ionization HOBT: hydroxybenzotriazole HPLC: high performance liquid hromatography KCS: kinetically controlled synthesis MALDI: matrix-assisted laser desorption ionization MAP: multiple antigen peptide system MS: mass spectrometry NMR: nuclear magnetic resonance SPS: solution phase synthesis SPPS: solid-phase peptide synthesis t-Boc: tert-butoxycarbonyl TCS: thermodynamically controlled synthesis TFA: trifluoroacetic acid Peptides are molecules of paramount importance in the medium, biocatalyst and substrate engineering, and fields of health care and nutrition. Several technologies recent advances and challenges in the field are analyzed. for their production are now available, among which Even though chemical synthesis is the most mature chemical and enzymatic synthesis are especially technology for peptide synthesis, lack of specificity and relevant. -
A Global Review on Short Peptides: Frontiers and Perspectives †
molecules Review A Global Review on Short Peptides: Frontiers and Perspectives † Vasso Apostolopoulos 1 , Joanna Bojarska 2,* , Tsun-Thai Chai 3 , Sherif Elnagdy 4 , Krzysztof Kaczmarek 5 , John Matsoukas 1,6,7, Roger New 8,9, Keykavous Parang 10 , Octavio Paredes Lopez 11 , Hamideh Parhiz 12, Conrad O. Perera 13, Monica Pickholz 14,15, Milan Remko 16, Michele Saviano 17, Mariusz Skwarczynski 18, Yefeng Tang 19, Wojciech M. Wolf 2,*, Taku Yoshiya 20 , Janusz Zabrocki 5, Piotr Zielenkiewicz 21,22 , Maha AlKhazindar 4 , Vanessa Barriga 1, Konstantinos Kelaidonis 6, Elham Mousavinezhad Sarasia 9 and Istvan Toth 18,23,24 1 Institute for Health and Sport, Victoria University, Melbourne, VIC 3030, Australia; [email protected] (V.A.); [email protected] (J.M.); [email protected] (V.B.) 2 Institute of General and Ecological Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego˙ 116, 90-924 Lodz, Poland 3 Department of Chemical Science, Faculty of Science, Universiti Tunku Abdul Rahman, Kampar 31900, Malaysia; [email protected] 4 Botany and Microbiology Department, Faculty of Science, Cairo University, Gamaa St., Giza 12613, Egypt; [email protected] (S.E.); [email protected] (M.A.) 5 Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego˙ 116, 90-924 Lodz, Poland; [email protected] (K.K.); [email protected] (J.Z.) 6 NewDrug, Patras Science Park, 26500 Patras, Greece; [email protected] 7 Department of Physiology and Pharmacology, -
INVESTIGATION INTO the CELLULAR ACTIONS of CARNOSINE and C-PEPTIDE Emma H
Marshall Digital Scholar Theses, Dissertations and Capstones 2014 INVESTIGATION INTO THE CELLULAR ACTIONS OF CARNOSINE AND C-PEPTIDE Emma H. Gardner [email protected] Follow this and additional works at: http://mds.marshall.edu/etd Part of the Analytical Chemistry Commons, and the Biochemistry Commons Recommended Citation Gardner, Emma H., "INVESTIGATION INTO THE CELLULAR ACTIONS OF CARNOSINE AND C-PEPTIDE" (2014). Theses, Dissertations and Capstones. Paper 868. This Thesis is brought to you for free and open access by Marshall Digital Scholar. It has been accepted for inclusion in Theses, Dissertations and Capstones by an authorized administrator of Marshall Digital Scholar. For more information, please contact [email protected]. INVESTIGATION INTO THE CELLULAR ACTIONS OF CARNOSINE AND C-PEPTIDE A thesis submitted to the Graduate College of Marshall University In partial fulfillment of the requirements for the degree of Master of Science in Chemistry by Emma H. Gardner Approval by Dr. Leslie Frost, Committee Chairperson Dr. Derrick Kolling Dr. Menashi Cohenford Marshall University May 2014 Table of Contents List of Tables iv List of Figures v IRB Letter vii Abstracts viii 1. Investigation into the Cellular Actions of Carnosine 1 Introduction 1 Experimental Methods 11 Preparation of Carnosine Affinity Beads 11 Tissue Lysis 12 Protein Isolation 13 SDS PAGE Analysis of Isolated Proteins 13 Preparation of Tryptic Digests of Protein Samples from SDS-PAGE Bands 13 Analysis of Tryptic Digests of Proteins by MALDI-TOF Mass Spectrometry 14 Analysis of Tryptic Peptide Amino Acid Sequences by LC/ESI/MS 15 Determining the Effect of Carnosine on AGE Structure Formation 15 Sodium Borohydride Reduction 16 UV-VIS Absorbance Profile of Hemin 16 Results and Discussion 16 Identification of Carnosine Binding Proteins Isolated from Bovine Kidney Tissue 16 Identification of Carnosine Binding Proteins Isolated from Mouse Kidney Tissue 24 Effect of Carnosine on the Formation of AGEs 28 Analysis of Carnosine-Hemin Interactions 33 Future Work 34 References 36 2.