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Dehydropeptide Supramolecular Hydrogels and Nanostructures As Potential Peptidomimetic Biomedical Materials
International Journal of Molecular Sciences Review Dehydropeptide Supramolecular Hydrogels and Nanostructures as Potential Peptidomimetic Biomedical Materials Peter J. Jervis * , Carolina Amorim, Teresa Pereira, José A. Martins and Paula M. T. Ferreira Centre of Chemistry, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; [email protected] (C.A.); [email protected] (T.P.); [email protected] (J.A.M.); [email protected] (P.M.T.F.) * Correspondence: [email protected] Abstract: Supramolecular peptide hydrogels are gaining increased attention, owing to their potential in a variety of biomedical applications. Their physical properties are similar to those of the extracel- lular matrix (ECM), which is key to their applications in the cell culture of specialized cells, tissue engineering, skin regeneration, and wound healing. The structure of these hydrogels usually consists of a di- or tripeptide capped on the N-terminus with a hydrophobic aromatic group, such as Fmoc or naphthalene. Although these peptide conjugates can offer advantages over other types of gelators such as cross-linked polymers, they usually possess the limitation of being particularly sensitive to proteolysis by endogenous proteases. One of the strategies reported that can overcome this barrier is to use a peptidomimetic strategy, in which natural amino acids are switched for non-proteinogenic analogues, such as D-amino acids, β-amino acids, or dehydroamino acids. Such peptides usually possess much greater resistance to enzymatic hydrolysis. Peptides containing dehydroamino acids, Citation: Jervis, P.J.; Amorim, C.; i.e., dehydropeptides, are particularly interesting, as the presence of the double bond also intro- Pereira, T.; Martins, J.A.; Ferreira, duces a conformational restraint to the peptide backbone, resulting in (often predictable) changes P.M.T. -
Highly Stereoselective and Efficient Synthesis of the Dopa Analogue In
Turk J Chem 34 (2010) , 181 – 186. c TUB¨ ITAK˙ doi:10.3906/kim-0904-14 Highly stereoselective and efficient synthesis of the dopa analogue in pepticinnamin E via enantioselective hydrogenation of dehydroamino acids Dequn SUN Marine College, Shandong University at Weihai, Weihai 264209, P. R. CHINA e-mail: [email protected] Received 13.04.2009 An efficient and new method was developed to prepare the dopa analogue 11 in natural pepticinnamin via catalytic hydrogenation of dehydroamino acids (DDAA) with a good yield and ee. Product 11 is a key intermediate towards the total synthesis of pepticinnamin E and its analogues. Key Words: Synthesis; dopa analogue; enantioselective hydrogenation; dehydroamino acid. Introduction Pepticinnamin E1 (Figure) is a major product of the pepticinnamins, which are isolated from the culture of Streptomyces sp. OH-4652. It was identified as a depsipeptide having an O − Z -pentenylcinnamin acid and a novel dopa analogue, whose configuration has been determined as S by the Waldmann group using the Sch¨ollkopf method. 2 Pepticinnamin E shows rather potent inhibitory activity against farnesyl protein transferase (FPTase) with an IC 50 of 0.3 μM and is the first competitive inhibitor derived from a natural product. Our interest in the exploitation of a new methodology to synthesise naturally bioactive peptides containing non-ribosomal amino acids led us to initiate the synthesis of pepticinnamin E (1). Emphasis was placed on preparing both dopa analogue 2 and O − Z -pentenylcinnamin acid. 3 This study reports the enantioselective synthesis of the precursor of the dopa analogue 2, which would be suitable for the total synthesis of pepticinnamin E and its analogues. -
Phosphorus-Containing Amino Acids with a P–C Bond in the Side Chain Or a P–O, P–Sorp–N Bond: Cite This: RSC Adv., 2020, 10, 6678 from Synthesis to Applications
RSC Advances View Article Online REVIEW View Journal | View Issue Phosphorus-containing amino acids with a P–C bond in the side chain or a P–O, P–SorP–N bond: Cite this: RSC Adv., 2020, 10, 6678 from synthesis to applications a b b Mathieu Arribat, Florine Cavelier * and Emmanuelle Remond´ * Since the discovery of (L)-phosphinothricin in the year 1970, the development of a-amino acids bearing a phosphorus group has been of renewed interest due to their diverse applications, including their use in [18F]-fluorolabeling, as fluorescent probes, as protecting groups and in the reversible immobilization of amino acids or peptide derivatives on carbon nanomaterials. Considerable progress has also been achieved in the field of antiviral agents, through the development of phosphoramidate prodrugs, which increase significantly the intracellular delivery of nucleoside monophosphate and monophosphonate analogues. This review aims to summarize the strategies reported in the literature for the synthesis of P(III), P(IV) and P(V) phosphorus-containing amino acids with P–C, P–O, P–SorP–N bonds in the side Received 2nd December 2019 Creative Commons Attribution-NonCommercial 3.0 Unported Licence. chains and their related applications, including their use in natural products, ligands for asymmetric Accepted 22nd January 2020 catalysis, peptidomimetics, therapeutic agents, chemical reagents, markers and nanomaterials. The DOI: 10.1039/c9ra10917j discussion is organized according to the position of the phosphorus atom linkage to the amino acid side rsc.li/rsc-advances chain, either in an a-, b-, g-ord-position or to a hydroxyl, thiol or amino group. 1. Introduction phosphinothricin has engendered the development of numerous drugs for neurodegenerative disease treatment. -
Is Chromogranin a Prohormone? Had Only a Fraction of the Pancreastatin Potency of the Peptide Characterized by Lee E
~N...:.AT.;:...U=--R.;:...E_V_O_L_.~32_5 _22_J_A_NU_A_R_Y_l_98_7 _________ NEWS ANDVIEWS-------------------'--301 Peptide function small percentage of plasma chromogranin was processed to a pancreastatin-like molecule, or if native chromogranin A Is chromogranin a prohormone? had only a fraction of the pancreastatin potency of the peptide characterized by Lee E. Eiden Tatemoto et at .. It is clearly necessary to establish that the molecule isolated by IN THE 4 December issue of Nature!, K. terminal processing signal for the forma- Tatemoto et at. is indeed the substance Tatemoto and co-workers report the tion of pancreastatin from a chromogranin found at beta-cell and D-cell receptors in sequence of a newly discovered putative A-like precursor in the rat. vivo. It will be of special interest to deter- hormone, pancreastatin, which as its There is chromogranin, as well as mine if amidation is necessary for bio name implies inhibits insulin (and soma pancreastatin, immunoreactivity in the logical activity, because amidation of tostatin) secretion from the endocrine pancreas of several species, and both poly- other biologically active peptides such as pancreas. There is a striking structural peptides are present in the brain"!', consis- enkephalins seems to oc-cur differentially similarity between pancreastatin and part tent with a precursor-product relationship in central and autonomic nervous tissue, of bovine chromogranin A, whose se between chromogranin A and pancreas- and this differential post-translational quence was recently reported in Nature by tatin. Whether or not pancreastatin is gen- modification may be relevant to different, myself and collaborators, and independ erated from chromogranin A or a chromo- as yet undiscovered hormonal functions of ently in the EMBO Journal by Benedum granin A-like precursor must await the these molecules. -
Sandra Cristina Gomes Oliveira Aminoácidos Não-Proteinogénicos
Universidade do Minho Escola de Ciências Sandra Cristina Gomes Oliveira Aminoácidos não-proteinogénicos como antioxidantes Aminoácidos não-proteinogénicos como antioxidantes Aminoácidos não-proteinogénicos como antioxidantes Sandra Cristina Gomes Oliveira Cristina Gomes Oliveira Sandra Minho | 2016 U Outubro de 2016 Universidade do Minho Escola de Ciências Sandra Cristina Gomes Oliveira Aminoácidos não-proteinogénicos como antioxidantes Tese de Mestrado Mestrado em Química Medicinal Trabalho efetuado sob a orientação de Doutor Luís Miguel Oliveira Sieuve Monteiro e de Doutora Maria de Fátima Azevedo Brandão Amaral Paiva Martins Outubro de 2016 Agradecimentos O projeto que desenvolvi ao longo do segundo ano de mestrado, só foi possível graças à colaboração de diversas pessoas que, ajudaram na sua realização, às quais aproveito desde já para agradecer. Em primeiro lugar, gostaria de agradecer ao Doutor Luís Monteiro e à Doutora Paula Ferreira, pelo enorme e incansável apoio, pelos seus ensinamentos, paciência e disponibilidade. À Doutora Fátima Paiva-Martins da Faculdade de Ciências da Universidade do Porto, agradeço por me ter proporcionado a oportunidade de desenvolver uma parte deste trabalho na Faculdade de Ciências da Universidade do Porto, pela sua orientação, ensinamento, disponibilidade e apoio. Gostaria também de agradecer aos meus amigos de mestrado pelo companheirismo e os momentos agradáveis. Aos meus colegas que estiveram comigo no laboratório da Faculdade de Ciências da Universidade do Porto por toda a ajuda que deram a integrar- me no laboratório nos primeiros tempos de trabalho. Agradeço também aos restantes amigos. Quero agradecer de uma forma muito especial à minha família que sempre se mostrou presente, disponível e compreensiva, principalmente aos meus pais por fazerem de mim aquilo que sou hoje. -
Copyrighted Material
353 Index a aromatic 1,2-diphosphines 84 absolute asymmetric synthesis 67, 88 aspergillomarasmine 10 acetaldehyde 48, 203, 223, 292, 321 asymmetric synthesis (ÀS) acetic acid moiety 207, 321 – absolute asymmetric synthesis 67 acetic anhydride 51, 93, 209 – classification 51, 67 acetoacetic ether 129 – diastereoselective asymmetric synthesis 67 acetonitrile 51, 100, 103, 227, 236, 360 –effectivenessof 67 acetoxy-ion elimination 58 – enantiomeric asymmetric synthesis 68 (R)-O-acetylserine complex 294 – partial asymmetric synthesis 67 (S)-O-acetylserine complex 204, 293 atropoisomer 296 acrylic acid 113, 120 azetidine-2-carboxylic acid 8 alanine alkylation 215, 220 alanopine 4, 7, 11 aldol condensation 111, 188, 222, 223 b aldol reaction 159, 224 Bacillus brevis 2 alkylhalides 115, 152, 216 Balz–Schiemann reaction 264 allyl chloride 218 benzaldehyde 147, 148–151, 162 aluminum nitrate 39 benzophenone moiety 96, 97 amino acid moiety 47, 110, 186 benzylamine 100, 102, 176 -amino aldehydes 173 benzylation reaction 82, 111 2-amino-2’-carboxyindan 95 benzylbromide 82, 111, 140, 143, 145, 184, 2-aminoacetophenone 190, 201, 285 218, 290, 318 2-aminoacrylic acid 99 benzylcinchonidine 75 aminobinaphthols 104, 106, 112, 114, 125 benzylcinchonine 81 3-aminobutanoic acid 179 (S)-2-N-(N’-benzylprolyl)aminobenzophenone -aminobutyric acid (GABA) 2 (BPB) 200 1-aminocyclopropanecarboxylic acid (ACC) (S)-BINOLAM 81 85 biomimetic chemical approach 25 1-amino-2,2-dideuterocyclopropanecarboxylicCOPYRIGHTEDbiomimetic enzymeMATERIAL systems 25 acid 85 Δ-bis[N-3-methylsalicylideneglycinate]sodium -
Synthesis of Bis-Dehydroamino Acid Derivatives by Suzuki
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Universidade do Minho: RepositoriUM High yielding synthesis of N-ethyl dehydroamino acids Luís S. Monteiro* and Ana S. Suárez Chemistry Centre, University of Minho, Gualtar, 4710-057 Braga, Portugal Author’s address: L. S. Monteiro, Chemistry Centre, University of Minho, Gualtar, 4710-057 Braga, Portugal, Fax: +351 253604382, e-mail: [email protected]. Abstract. Recently we reported the use of a sequence of alkylation and dehydration methodologies to obtain N-ethyl-- dehydroamino acid derivatives. The application of this N-alkylation procedure to several methyl esters of -dibromo and - bromo, -substituted dehydroamino acids protected with standard amine protecting groups was subsequently reported. The corresponding N-ethyl, -bromo dehydroamino acid derivatives were obtained in fair to high yields and some were used as substrates in Suzuki cross coupling reactions to give N-ethyl, -disubstituted dehydroalanine derivatives. Herein, we further explore N-ethylation of -halo dehydroamino acid derivatives using triethyloxonium tetrafluoroborate as alkylating agent but substituting N,N-diisopropylethylamine for potassium tert-butoxide as auxiliary base. In these conditions, for all -halo dehydroamino acid derivatives, reactions were complete and the N-ethylated derivative could be isolated in high yield. This method was also applied for N-ethylation of non-halogenated dehydroamino acids. Again, with all compounds the reactions were complete and the N-ethyl dehydroamino acid derivatives could be isolated in high yields. Some of these N-ethyl dehydroamino acid methyl ester derivatives were converted in high yields to their corresponding acids and coupled to an amino acid methyl ester to give N-ethyl dehydrodipeptide derivatives in good yields. -
N,N-Diprotected Dehydroamino Acid Derivatives: Versatile Substrates for the Synthesis of Novel Amino Acids
N,N-DIPROTECTED DEHYDROAMINO ACID DERIVATIVES: VERSATILE SUBSTRATES FOR THE SYNTHESIS OF NOVEL AMINO ACIDS Paula M. T. Ferreira and Luís S. Monteiro Department of Chemistry, University of Minho, Gualtar, 4710-057 Braga, Portugal (e-mail: [email protected]) Abstract. Non-proteinogenic amino acids are an important class of organic compounds that can have intrinsic biological activity or can be found in peptides with antiviral, antitumor, anti-inflammatory or immunosuppressive activities. This type of compounds is also important in drug development, in the elucidation of biochemical pathways and in conformational studies. Therefore, research towards efficient methods that allow the synthesis of these compounds constitutes an important area of peptide chemistry. In our laboratories we have developed a new and high yielding method for the synthesis of N,N-diprotected dehydroamino acid derivatives using tert-butyl pyrocarbonate and 4-dimethylaminopyridine. These compounds were used as substrates in several types of reactions, allowing the synthesis of a variety of new amino acid derivatives. Some of these new compounds are heterocyclic systems or contain heterocyclic moieties such as pyrazole, indole, or imidazole. Thus, several nitrogen heterocycles were reacted with N,N-diprotected dehydroalanine to give new β-substituted alanines and dehydroalanines. Furanic amino acids were obtained treating the methyl ester of N-(4-toluenesulfonyl), N-(tert-butoxycarbonyl) dehydroalanine with carbon nucleophiles of the β-dicarbonyl type having at least one methyl group attached to one of the carbonyl groups. Treatment of these furanic amino acids with trifluoracetic acid afforded pyrrole derivatives in good to high yields. A N,N-diprotected 1,4-dihydropyrazine was obtained reacting the methyl ester of N-(4-toluenesulfonyl), N-(tert-butoxycarbonyl)dehydroalanine with 4-dimethylaminopyridine and an excess of potassium carbonate. -
Thiol-Disulfide Exchange in Human Growth Hormone Saradha Chandrasekhar Purdue University
Purdue University Purdue e-Pubs Open Access Dissertations Theses and Dissertations January 2015 Thiol-Disulfide Exchange in Human Growth Hormone Saradha Chandrasekhar Purdue University Follow this and additional works at: https://docs.lib.purdue.edu/open_access_dissertations Recommended Citation Chandrasekhar, Saradha, "Thiol-Disulfide Exchange in Human Growth Hormone" (2015). Open Access Dissertations. 1449. https://docs.lib.purdue.edu/open_access_dissertations/1449 This document has been made available through Purdue e-Pubs, a service of the Purdue University Libraries. Please contact [email protected] for additional information. i THIOL-DISULFIDE EXCHANGE IN HUMAN GROWTH HORMONE A Dissertation Submitted to the Faculty of Purdue University by Saradha Chandrasekhar In Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy August 2015 Purdue University West Lafayette, Indiana ii To my parents Chandrasekhar and Visalakshi & To my fiancé Niranjan iii ACKNOWLEDGEMENTS I would like to thank Dr. Elizabeth M. Topp for her tremendous support, guidance and valuable suggestions throughout. The successful completion of my PhD program would not have been possible without her constant encouragement and enthusiasm. Through the last five years, I’ve learned so much as a graduate student in her lab. My thesis committee members: Dr. Stephen R. Byrn, Dr. Gregory T. Knipp and Dr. Weiguo A. Tao, thank you for your time and for all your valuable comments during my oral preliminary exam. I would also like to thank Dr. Fred Regnier for his suggestions with the work on human growth hormone. I am grateful to all my lab members and friends for their assistance and support. I would like to especially thank Dr. -
1 the Historical Development of Asymmetric Hydrogenation
1 1 The Historical Development of Asymmetric Hydrogenation John M. Brown Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, UK 1.1 Introduction How did chemists gain the current levels of knowledge and expertise for control- ling molecular chirality through hydrogenation or otherwise? The desirability of asymmetric synthesis was recognized in the 1880s by Emil Fischer and others, but practical solutions only arose more than 80 years later. The key reasons are explored here. This brief review has five main Sections 1.2–1.6, covering first the development of ideas underpinning our understanding of asymmetry, then the initial applications to asymmetric synthesis, and also the development of asymmetric heterogeneous hydrogenation of alkenes. The final sections on asymmetric homogeneous hydro- genation of alkenes are limited to work published in or before the early 1980s, in advance of extensive developments, and thus excluding the important inputs of irid- ium catalysts and more recently early transition metals. 1.2 Early Work on the Recognition of Molecular Asymmetry Chemistry was an emerging science by the beginning of the nineteenth century with many opportunities for fundamental discovery. At that time scientists crossed dis- ciplines easily; optics and mineralogy played important roles because of the ready accessibility and verifiable purity of solid substances. Malus had invented the first polarimeter in 1808, enabling measurement of both the sense and magnitude of rota- tion of plane-polarized light [4]. Following this, work by Arago and others on the interaction of polarized light with minerals intensified in the following decade [5]. Haüy had earlier concluded that each type of crystal has a fundamental primitive, nucleus or “integrant molecule” of a particular shape, that could not be broken fur- ther without destroying both the physical and chemical nature of the crystal. -
A Process for Producing Human Growth Hormone
Patentamt JEuropaischesEuropean Patent Office (in Publication number: 0 217 814 Office europeen des brevets B1 EUROPEAN PATENT SPECIFICATION Date of publication of patent specification: 16.05.90 int.ci.5: C 12 P 21/06, C 12 N 15/00 Application number: 86901361.5 Date of filing: 06.02.86 International application number: PCT/DK86/00014 International publication number: WO 86/04609 14.08.86 Gazette 86/18 A PROCESS FOR PRODUCING HUMAN GROWTH HORMONE. (§) Priority: 07.02.85 DK 556/85 Proprietor: NOVO-NORDISK A/S Novo Alle DK-2880 Bagsvaerd (DK) Date of publication of application: 15.04.87 Bulletin 87/16 Inventor: ANDERSEN, Henrik, Dalboge Ordrupvej 1 12 B Publication of the grant of the patent: DK-2920 Charlottenlund (DK) 16.05.90 Bulletin 90/20 Inventor: PEDERSEN, John Kajerodvaenge 35 DK-3460 Birkero /d (DK) Designated Contracting States: Inventor: CHRISTENSEN, Thorkild AT BE CH DE FR GB IT LI LU NL SE Bellisvej 55 DK-3450Allerod(DK) Inventor: HANSEN, Jorli, Winnie References cited: Kloverhoj20 EP-A-0020290 DK-2600Glostrup(DK) EP-A-0089626 Inventor: JESSEN, Torben, Ehlern WO-A-84/02351 Kalundborgvej 216 US-A-4543329 DK-4300Holbaek(DK) Chemical Abstracts, vol. 77, 1972, Abstract no. 2289q, Calluhan et al, Fed. Proc. Fed. Amer, Coc. Representative: von Kreisler, Alek, Dipl.-Chem. Exp. Biol. 1972 31(3), 1105-13 (Eng). etal 00 Deichmannhaus am Hauptbahnhof Chemical Abstracts, vol. 76, 1972, Abstract no. D-5000 Koln 1 (DE) 83215s, Lindley et al. Biochem J. 1972. 126(3), 683-5(Eng). O Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. -
Evidence That the Major Degradation Product of Glucose-Dependent Insulinotropic Polypeptide, GIP(3–42), Is a GIP Receptor Antagonist in Vivo
525 Evidence that the major degradation product of glucose-dependent insulinotropic polypeptide, GIP(3–42), is a GIP receptor antagonist in vivo V A Gault, J C Parker, P Harriott1, P R Flatt and F P M O’Harte School of Biomedical Sciences, University of Ulster, Cromore Road, Coleraine, N Ireland BT52 1SA, UK 1Centre for Peptide and Protein Engineering, School of Biology and Biochemistry, The Queen’s University of Belfast, Medical Biology Centre, Belfast, N Ireland BT9 7BL, UK (Requests for offprints should be addressed to V A Gault; Email: [email protected]) Abstract The incretin hormone glucose-dependent insulinotropic was significantly less potent at stimulating insulin secretion polypeptide (GIP) is rapidly degraded in the circulation (1·9- to 3·2-fold; P<0·001), compared with native GIP by dipeptidyl peptidase IV forming the N-terminally and significantly inhibited GIP-stimulated (107 M) truncated peptide GIP(3–42). The present study exam- insulin secretion with maximal inhibition (48·86·2%; ined the biological activity of this abundant circulating P<0·001) observed at 107 M. In (ob/ob) mice, admin- fragment peptide to establish its possible role in GIP istration of GIP(3–42) significantly inhibited GIP- action. Human GIP and GIP(3–42) were synthesised stimulated insulin release (2·1-fold decrease; P<0·001) and by Fmoc solid-phase peptide synthesis, purified by exaggerated the glycaemic excursion (1·4-fold; P<0·001) HPLC and characterised by electrospray ionisation-mass induced by a conjoint glucose load. These data indicate spectrometry. In GIP receptor-transfected Chinese ham- that the N-terminally truncated GIP(3–42) fragment acts ster lung fibroblasts, GIP(3–42) dose dependently inhib- as a GIP receptor antagonist, moderating the insulin ited GIP-stimulated (107 M) cAMP production (up to secreting and metabolic actions of GIP in vivo.