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  • 1
    Online Resource
    Online Resource
    Karlsruhe : KIT Scientific-Publ.
    Keywords: IT-Management ; Unternehmensarchitektur ; Agentenbasierte Modellierung ; Forschungsbericht ; Hochschulschrift ; Servicegrad ; Organic Computing ; Mehragentensystem
    Type of Medium: Online Resource
    Pages: Online-Ressource (382 S., 9,86 MB) , graph. Darst.
    ISBN: 3866447302 , 9783866447301
    DDC: 658.812028563
    Language: English
    Note: Zugl.: Karlsruhe, Karlsruher Inst. für Technologie, Diss., 2011 , Systemvoraussetzungen: Acrobat reader.
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  • 2
    Online Resource
    Online Resource
    Newark :John Wiley & Sons, Incorporated,
    Keywords: Proteins-Synthesis. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (627 pages)
    Edition: 1st ed.
    ISBN: 9783527823574
    DDC: 572.645
    Language: English
    Note: Cover -- Title Page -- Copyright -- Contents -- Preface -- Chapter 1 Characterization of Protein Molecules Prepared by Total Chemical Synthesis -- 1.1 Introduction -- 1.2 Chemical Protein Synthesis -- 1.3 Comments on Characterization of Synthetic Protein Molecules -- 1.3.1 Homogeneity -- 1.3.2 Amino Acid Sequence -- 1.3.3 Chemical Analogues -- 1.3.4 Limitations of SPPS -- 1.3.5 Folding as a Purification Step -- 1.4 Summary -- References -- Chapter 2 Automated Fast Flow Peptide Synthesis -- 2.1 Introduction -- 2.2 Results -- 2.2.1 Summary -- 2.2.1.1 Mechanical Principles -- 2.2.1.2 Chemical Principles -- 2.2.1.3 User Interface Principles -- 2.2.1.4 Data Analysis Method -- 2.2.1.5 Outcome -- 2.2.2 First‐generation Automated Fast Flow Peptide Synthesis -- 2.2.2.1 Key Findings -- 2.2.2.2 Design of First‐generation AFPS -- 2.2.2.3 Characterization of First‐generation AFPS -- 2.2.3 Second‐generation Automated Fast Flow Peptide Synthesis -- 2.2.3.1 Key Findings -- 2.2.3.2 Design of Second‐generation AFPS -- 2.2.3.3 Characterization and Use of Second‐generation AFPS -- 2.2.4 Third‐generation Automated Fast Flow Peptide Synthesis -- 2.2.4.1 Key Findings -- 2.2.4.2 Design of Third‐generation AFPS -- 2.2.4.3 Characterization of Third‐generation AFPS -- 2.2.4.4 Reagent Stability Study -- 2.2.5 Fourth‐generation Automated Fast Flow Peptide Synthesis -- 2.2.5.1 Key Findings -- 2.2.5.2 Effect of Solvent on Fast Flow Synthesis -- 2.2.5.3 Design and Characterization of Fourth‐generation AFPS -- 2.3 Conclusions -- Acknowledgments -- References -- Chapter 3 N,S‐ and N,Se‐Acyl Transfer Devices in Protein Synthesis -- 3.1 Introduction -- 3.2 N,S‐ and N,Se‐Acyl Transfer Devices: General Presentation, Reactivity and Statistical Overview of Their Utilization -- 3.2.1 General Presentation of N,S‐ and N,Se‐Acyl Transfer Devices. , 3.2.2 Relative Reactivity of N,S‐ and N,Se‐Acyl Transfer Devices -- 3.2.3 A Statistical Overview of the Synthetic Use of N,S‐ and N,Se‐Acyl Transfer Devices for Protein Total Chemical Synthesis -- 3.3 Preparation of SEA/SeEAoff and SEAlide Peptides -- 3.3.1 Preparation of SEA and SeEA Peptides -- 3.3.2 Preparation of SEAlide Peptides -- 3.4 Redox‐controlled Assembly of Biotinylated NK1 Domain of the Hepatocyte Growth Factor (HGF) Using SEA and SeEA Chemistries -- 3.5 The Total Chemical Synthesis of GM2‐AP Using SEAlide‐based Chemistry -- 3.6 Conclusion -- References -- Chapter 4 Chemical Synthesis of Proteins Through Native Chemical Ligation of Peptide Hydrazides -- 4.1 Introduction -- 4.2 Development of Peptide Hydrazide‐based Native Chemical Ligation -- 4.2.1 Conversion of Peptide Hydrazide to Peptide Azide -- 4.2.2 Acyl Azide‐based Solid‐phase Peptide Synthesis -- 4.2.3 Acyl Azide‐based Solution‐phase Peptide Synthesis -- 4.2.4 The Transesterification of Acyl Azide -- 4.2.5 Development of Peptide Hydrazide‐based Native Chemical Ligation -- 4.3 Optimization of Peptide Hydrazide‐based Native Chemical Ligation -- 4.3.1 Preparation of Peptide Hydrazides -- 4.3.1.1 2‐Cl‐Trt‐Cl Resin -- 4.3.1.2 Peptide Hydrazides from Expressed Proteins -- 4.3.1.3 Sortase‐mediated Hydrazide Generation -- 4.3.2 Activation Methods of Peptide Hydrazide -- 4.3.2.1 Knorr Pyrazole Synthesis -- 4.3.2.2 Activation in TFA -- 4.3.3 Ligation Sites of Peptide Hydrazide -- 4.3.4 Multiple Fragment Ligation Based on Peptide Hydrazide -- 4.3.4.1 N‐to‐C Sequential Ligation -- 4.3.4.2 Convergent Ligation -- 4.3.4.3 One‐pot Ligation -- 4.4 Application of Peptide Hydrazide‐based Native Chemical Ligation -- 4.4.1 Peptide Drugs and Diagnostic Tools -- 4.4.1.1 Peptide Hydrazides for Cyclic Peptide Synthesis -- 4.4.1.2 Screening for d Peptide Inhibitors Targeting PD‐L1. , 4.4.1.3 Chemical Synthesis of DCAF for Targeted Antibody Blocking -- 4.4.1.4 Peptide Toxins -- 4.4.2 Synthesis and Application of Two‐photon Activatable Chemokine CCL5 -- 4.4.3 Proteins with Posttranslational Modification -- 4.4.3.1 The Synthesis of Glycosylation‐modified Full‐length IL‐6 -- 4.4.3.2 The Chemical Synthesis of EPO -- 4.4.3.3 Chemical Synthesis of Homogeneous Phosphorylated p62 -- 4.4.3.4 Chemical Synthesis of K19, K48 Bi‐acetylated Atg3 Protein -- 4.4.4 Ubiquitin Chains -- 4.4.4.1 Synthesis of K27‐linked Ubiquitin Chains -- 4.4.4.2 Synthesis of Atypical Ubiquitin Chains by Using an Isopeptide‐linked Ub Isomer -- 4.4.4.3 Synthesis of Atypical Ubiquitin Chains Using an Isopeptide‐linked Ub Isomer -- 4.4.5 Modified Nucleosomes -- 4.4.5.1 Synthesis of DNA‐barcoded Modified Nucleosome Library -- 4.4.5.2 Synthesis of Modified Histone Analogs with a Cysteine Aminoethylation‐assisted Chemical Ubiquitination Strategy -- 4.4.5.3 Synthesis of Ubiquitylated Histones for Examination of the Deubiquitination Specificity of USP51 -- 4.4.6 Membrane Proteins -- 4.4.7 Mirror‐image Biological Systems -- 4.5 Summary and Outlook -- References -- Chapter 5 Expanding Native Chemical Ligation Methodology with Synthetic Amino Acid Derivatives -- 5.1 Native Chemical Ligation -- 5.2 Desulfurization Chemistries -- 5.3 Aspartic Acid (Asp, D) -- 5.4 Glutamic Acid (Glu, E) -- 5.5 Phenylalanine (Phe, F) -- 5.6 Isoleucine (Ile, I) -- 5.7 Lysine (Lys, K) -- 5.8 Leucine (Leu, L) -- 5.9 Asparagine (Asn, N) -- 5.10 Proline (Pro, P) -- 5.11 Glutamine (Gln, Q) -- 5.12 Arginine (Arg, R) -- 5.13 Threonine (Thr, T) -- 5.14 Valine (Val, V) -- 5.15 Tryptophan (Trp, W) -- 5.16 Application of Selenocysteine (Sec) to Ligation Chemistry -- 5.17 Aspartic Acid (Asp, D) -- 5.18 Glutamic Acid (Glu, E) -- 5.19 Phenylalanine (Phe, F) -- 5.20 Leucine (Leu, L) -- 5.21 Proline (Pro, P). , 5.22 Serine (Ser, S) -- References -- Chapter 6 Peptide Ligations at Sterically Demanding Sites -- 6.1 Introduction -- 6.2 Ligations Using Thioesters -- 6.2.1 Exogenous Additive‐promoted Ligations -- 6.2.2 Ligations Using Reactive Thioesters -- 6.2.3 Internal Activation Strategy in Peptide Ligations -- 6.3 Ligations Using Oxo‐esters -- 6.4 Peptide Ligations Based on Selenoesters -- 6.5 Microfluidics‐promoted NCL -- 6.6 Representative Applications in Protein Synthesis -- 6.7 Summary and Outlook -- References -- Chapter 7 Controlling Segment Solubility in Large Protein Synthesis -- 7.1 Solvent Manipulation -- 7.2 Isoacyl Strategy -- 7.3 Semipermanent Solubilizing Tags -- 7.3.1 N‐ or C‐Terminal Solubilizing "Tails" -- 7.3.2 Reversible Backbone Modifications as Solubilizing Tags -- 7.3.3 Building Block Solubilizing Tags -- 7.3.4 Extendable Side‐chain‐based Solubilizing Tags -- References -- Chapter 8 Toward HPLC‐free Total Chemical Synthesis of Proteins -- 8.1 Introduction -- 8.1.1 Capture and Release Purification -- 8.1.2 Solid‐phase Chemical Ligations (SPCL) -- 8.2 Synthesis of Peptide Segments for Native Chemical Ligation -- 8.2.1 HPLC‐free Preparation of N‐terminal Peptide Segments for NCL -- 8.2.2 HPLC‐free Preparation of C‐terminal Peptide Segments for NCL -- 8.3 Synthesis of Proteins Using the His6 Tag -- 8.3.1 Reversible His6‐based Capture Tags -- 8.3.2 His6‐based Immobilization for C‐to‐N Assembly of Crambin -- 8.3.3 His6‐based Immobilization for Assembly of Proteins on Microtiter Plates -- 8.3.4 His6 and Hydrazide Tags for Sequential N‐to‐C Capture and Release -- 8.4 Synthesis of Proteins via Oxime Formation -- 8.4.1 Reversible Oxime‐based Capture Tags -- 8.4.2 Oxime‐based Immobilization for N‐to‐C Solid‐phase Chemical Ligations -- 8.4.3 Oxime‐based Immobilization for C‐to‐N Solid‐phase Chemical Ligations. , 8.4.4 Oxime‐based C‐to‐N Solid‐phase Chemical Ligations -- 8.5 Synthesis of Proteins via Hydrazone Formation -- 8.5.1 Reversible Hydrazone‐based Capture Tags -- 8.5.2 Hydrazone‐based Immobilization for Assembly of Proteins on Microtiter Plates -- 8.6 Synthesis of Proteins Using Click Chemistry -- 8.6.1 Click‐based Immobilization for N‐to‐C Solid‐phase Peptide Ligations Using a Protected Alkyne -- 8.6.2 Click‐based Immobilization for N‐to‐C Solid‐phase Peptide Ligations Using a Sea Group -- 8.7 Synthesis of Proteins Using the KAHA Ligation -- 8.7.1 The KAHA Ligation -- 8.7.2 HPLC‐free Synthesis of Proteins Using the KAHA Ligation -- 8.8 Synthesis of Proteins Using Photocleavable Tags -- 8.8.1 Synthesis of Proteins Using a Photocleavable Biotin‐based Purification Tag -- 8.8.2 Synthesis of Proteins Using a Photocleavable His6‐based Purification Tag -- 8.9 Conclusion -- References -- Chapter 9 Solid‐phase Chemical Ligation -- 9.1 Introduction -- 9.1.1 The Promises of Solid Phase Chemical Ligation (SPCL) -- 9.1.2 Chemical Ligation Reactions Used for SPCL -- 9.1.3 Key Requirements for a SPCL Strategy -- 9.2 SPCL in the C‐to‐N Direction -- 9.2.1 Temporary Masking Groups to Enable Iterative Ligations -- 9.2.2 Linkers for C‐to‐N SPCL -- 9.2.2.1 Use of Same Linker and Solid Support for SPPS and SPCL -- 9.2.2.2 Re‐immobilization of the C‐Terminal Segment -- 9.3 SPCL in the N‐to‐C Direction -- 9.3.1 Temporary Masking Groups to Enable Iterative Ligations -- 9.3.2 Linkers for N‐to‐C SPCL -- 9.3.3 Case Study -- 9.3.4 SPCL with Concomitant Purifications -- 9.4 Post‐Ligation Solid‐Supported Transformations -- 9.4.1 Chemical Transformations -- 9.4.2 Biochemical Transformations -- 9.5 Solid Support -- 9.6 Conclusion and Perspectives -- Acknowledgment -- References -- Chapter 10 Ser/Thr Ligation for Protein Chemical Synthesis -- 10.1 Serine/Threonine Ligation. , 10.2 Epimerization Issue.
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  • 3
    Online Resource
    Online Resource
    Cham :Springer International Publishing AG,
    Keywords: Proteins-Synthesis. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (235 pages)
    Edition: 1st ed.
    ISBN: 9783319191898
    Series Statement: Topics in Current Chemistry Series ; v.363
    DDC: 572.645
    Language: English
    Note: Intro -- Preface -- Contents -- Chemical Protein Synthesis with the KAHA Ligation -- 1 Introduction -- 1.1 Overview of Chemical Ligations for Protein Synthesis -- 1.2 KAHA Ligation -- 1.2.1 Types of KAHA Ligation -- 1.2.2 Mechanism -- Type I -- Type II -- 2 α-Ketoacids -- 2.1 General Properties of α-Keto Acids -- 2.2 Synthesis of Peptide α-Ketoacids -- 2.2.1 Phosphorus Ylides -- 2.2.2 Sulfur Ylides -- 2.3 Solid Supported Linker for Peptide Sulfur-Ylide Synthesis -- 2.4 Protecting Groups for C-Terminal α-Ketoacids -- 3 Hydroxylamines -- 3.1 Overview -- 3.2 O-Unsubstituted Peptide Hydroxylamines -- 3.2.1 On-Resin Synthesis by Nucleophilic Substitution -- 3.2.2 Nitrone-Protected N-Hydroxy Aminoacid Building Blocks -- 3.2.3 In Situ Preparation of Peptides with N-Terminal Nitrone-Protected N-Hydroxy Aminoacids -- 3.2.4 Synthesis of beta-Peptides with Isoxazolidin-5-One Building Blocks -- 3.3 O-Substituted Hydroxylamines -- 3.3.1 OBz Hydroxylamines -- 3.3.2 O-Aryl Hydroxylamines -- 3.3.3 Cyclic Hydroxylamines -- 4 Ligations/Protein Synthesis -- 4.1 Ligations with Type I Hydroxylamines -- 4.2 Ligations with 5-Oxaproline -- 4.2.1 Formation and Rearrangement of Depsipeptides -- 4.2.2 Two-Segment Ligations with 5-Oxaproline -- 4.2.3 Multi-Segment Ligations -- UFM-1 -- SUMO3 -- 4.3 Peptide Macrocycles -- 4.3.1 Macrocyclizations with Free Hydroxylamines: Synthesis of Epi-Aza-Surfactin -- 4.3.2 Synthesis of Natural Products with Nitrone-Protected Monomers -- 4.3.3 General and Efficient Synthesis of Macrocyclic Peptides with 5-Oxaproline -- 5 Potassium Acyltrifluoroborate (KAT) Ligation -- 6 Outlook -- 6.1 Development of New Cyclic Hydroxylamines -- 6.2 Orthogonally Protected α-Ketoacids -- 6.3 Kinetically Controlled Ligations -- 6.4 Combining KAHA Ligation and Native Chemical Ligation -- 6.5 Summary -- References. , Chemical Synthesis of Proteins Using N-Sulfanylethylanilide Peptides, Based on N-S Acyl Transfer Chemistry -- 1 Introduction -- 2 Development of N-S Acyl Transfer Device for Thioester Synthesis with Practical Applications in Peptide/Protein Synthesis -- 2.1 Naturally Occurring Thioester Formation: Intein-Extein System -- 2.2 Chemistry Seen in Naturally Occurring Thioester Formation -- 2.3 Peptidyloxazolidinone as Thioester Precursor -- 2.4 N-Sulfanylethylaniline Linker as Alternative to Oxazolidinone -- 2.5 Initial Observation on of SEAlide Peptide -- 2.6 Attempted Sequential NCL Using SEAlide Peptides -- 2.7 SEAlide Peptides Function as Thioesters in the Presence of Phosphate Salts -- 2.8 Synthesis of hANP by One-Pot/N-to-C-Directed Sequential NCL -- 2.9 One-Pot/Four-Segment Ligation -- 2.10 Dual Kinetically Controlled Ligation -- 2.11 Chemical Synthesis of Proteins Using SEAlide Peptides -- 3 Summary, Conclusions, and Outlook -- References -- Postligation-Desulfurization: A General Approach for Chemical Protein Synthesis -- 1 Introduction -- 2 Postligation-Desulfurization (Alanine Ligation) -- 2.1 Metal-Based Desulfurization -- 2.2 Metal-Free Desulfurization -- 2.3 Application of Postligation-Metal-Free Desulfurization (Ala Ligation) -- 3 Postligation-Desulfurization at Other Amino Acid Sites -- 3.1 Metal-Free Desulfurization -- 3.1.1 Ligation at Valine Site -- 3.1.2 Ligation at Lysine Site -- 3.1.3 Ligation at Threonine Site -- 3.1.4 Ligation at Leucine Site -- 3.1.5 Ligation at Proline Site -- 3.1.6 Ligation at Arginine Site -- 3.1.7 Ligation at Aspartic Acid Site -- 3.1.8 Ligation at the Glutamate Site -- 3.2 Metal-Based Desulfurization -- 3.2.1 Ligation at the Phenylalanine Site -- 3.2.2 Ligation at the Glutamine Site -- 3.2.3 Ligation at the Tryptophan Site -- 3.3 Sugar-Assisted Ligation (SAL) -- 3.4 One-Pot Ligation-Desulfurization. , 4 Total Synthesis of hPTH -- 5 Conclusion -- References -- Solid Phase Protein Chemical Synthesis -- 1 Introduction -- 2 Chemical Protein Synthesis by Stepwise Solid Phase Peptide Synthesis -- 3 Purification by Selective Capture on a Solid Support -- 3.1 Purification by Covalent Capture on a Solid Support -- 3.2 Purification by Covalent Internal Resin Capture -- 3.3 Purification by Selective and Non-Covalent Adsorption on a Solid Support -- 4 Chemical Protein Synthesis by the Solid Phase Sequential Chemoselective Ligation of Unprotected Peptide Segments -- 4.1 Advantages of the Solid Phase Approach -- 4.2 Solid Phase Protein Synthesis in the C-to-N Direction -- 4.2.1 N-Terminal Cysteine Protection Strategies -- 4.2.2 Linker Strategies for C-to-N Solid Phase Elongation Strategies -- 4.3 N-to-C Solid Phase Chemical Protein Synthesis -- 5 Conclusion -- References -- New Methods for Chemical Protein Synthesis -- 1 Introduction -- 2 Synthesis of Peptide Fragments -- 2.1 New Methods for Peptide Synthesis -- 2.1.1 Amide Bond Formation -- 2.1.2 Methods for the Synthesis of Long/Difficult Peptides -- 2.2 New Methods for Activated Peptide Synthesis -- 3 Assembly of Peptide Fragments -- 3.1 New Methods for Peptide Ligation -- 3.1.1 KAHA Method -- 3.1.2 Fragment Condensation -- 3.1.3 Ser and Thr Ligation -- 3.2 One-Pot Strategies for the Assembly of Peptide Fragments -- 3.2.1 C-to-N Direction -- 3.2.2 N-to-C Direction -- 4 Folding of Synthetic Polypeptide Chains -- 5 Conclusion -- References -- Chemical and Biological Tools for the Preparation of Modified Histone Proteins -- 1 Introduction -- 2 Genetic Approaches for Modified Histones -- 2.1 Genetic Mimics of Histone Modifications -- 2.2 Codon Suppression: Expanded Genetic Code Approaches to Modified Histones -- 2.2.1 Encoded Lysine Modifications. , 2.2.2 Combined Genetic and Chemical Approaches: Modifications Introduced Through Dehydroalanine -- 2.2.3 Encoded Phosphoserine -- 3 Chemical Installation of PTM Analogs at Single Cysteine Sites -- 3.1 MLAs: Methyllysine Analogs -- 3.2 Acetyllysine Analogs via Cysteine Alkylation -- 3.3 Thiol-ene Chemistry to Introduce Modification Analogs -- 3.4 Disulfide Stapling -- 4 Chemical Ligation for the Preparation of Modified Histone Proteins -- 4.1 Histone Semi-Synthesis by Expressed Protein Ligation: Modifications Near the Histone N-Terminus -- 4.2 Considerations for Selection of Appropriate Ligation Sites -- 4.3 Histone Semi-Synthesis by Expressed Protein Ligation: Modifications Near the Histone C-Terminus -- 4.4 Total Synthesis of Histone Proteins by NCL -- 5 Prospects: Synthetic Histone Proteins in the Eukaryotic Cell -- References -- Index.
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  • 4
    Online Resource
    Online Resource
    Cham :Springer International Publishing AG,
    Keywords: Proteins-Synthesis. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (275 pages)
    Edition: 1st ed.
    ISBN: 9783319191867
    Series Statement: Topics in Current Chemistry Series ; v.362
    DDC: 574.19295999999997
    Language: English
    Note: Intro -- Preface -- Contents -- Total Synthesis of Glycosylated Proteins -- 1 Introduction -- 2 Chemical Synthesis of Glycopeptides -- 3 Chemical Synthesis of Glycoproteins -- 3.1 Advances in Chemical Ligation -- 3.2 Total Synthesis of Homogeneous N-Glycosylated Proteins -- 3.2.1 Human Glycoprotein Hormones -- Human α-Glycoprotein Hormone (α-hGPH) -- Human beta-Follicle Stimulating Hormone (beta-hFSH) -- Human beta-Luteinizing Hormone (beta-hLH) and beta-ChorionicGonadotropin Hormone (beta-hCG) -- 3.2.2 Granulocyte-Macrophage Colony-Stimulating Factor (GM-CSF) -- 3.2.3 Erythropoietin (EPO) -- 4 Conclusion -- References -- Modern Extensions of Native Chemical Ligation for Chemical Protein Synthesis -- 1 Introduction -- 2 Native Chemical Ligation -- 2.1 Scope and Mechanism -- 2.2 Modern Application -- 3 Development of New Cysteine Ligation Surrogates -- 3.1 Auxiliary-Based Methods -- 3.1.1 N-Terminal Ligation Auxiliaries -- 3.1.2 Side-Chain Ligation Auxiliaries -- 4 Post-Ligation Manipulations -- 4.1 Ligation-Desulfurization -- 4.2 Ligation-Desulfurization in Protein Synthesis -- 4.3 Ligation-Desulfurization at Thiol-Derived Amino Acids -- 4.3.1 Phenylalanine -- 4.3.2 Valine -- 4.3.3 Threonine -- 4.3.4 Lysine -- 4.3.5 Leucine -- 4.3.6 Proline -- 4.3.7 Glutamine -- 4.3.8 Arginine -- 4.3.9 Aspartic Acid -- 4.3.10 Glutamic Acid -- 4.3.11 Tryptophan -- 4.3.12 Protein Synthesis via Ligation at Non-Cys Sites -- 4.4 Ligation at Selenocysteine -- 4.5 Ligation-Deselenization Chemistry -- 5 Conclusion -- References -- Chemical Methods for Protein Ubiquitination -- 1 Introduction -- 2 Preparation of Ub-Proteins with Native Isopeptide Bonds -- 2.1 Nα-Auxiliary-Mediated Ubiquitination -- 2.2 Thiolated-Lysine-Mediated Ubiquitination -- 2.3 Ubiquitination Through Ag+-Mediated Activation of Ubiquitin C-Terminal Thioester. , 3 Preparation of Ub-Proteins with Non-Native Linkages -- 4 Conclusion -- References -- Peptide Thioester Formation via an Intramolecular N to S Acyl Shift for Peptide Ligation -- 1 Introduction -- 2 Intramolecular N to S Acyl Shift Reaction -- 2.1 At the Thiol Auxiliary, Dmmb -- 2.2 At the Cysteine Residue -- 3 Peptide Thioester Synthesis via Intramolecular N to S Acyl Shift -- 3.1 Active Acyl Structure -- 3.2 Thiol Auxiliary, Dmmb -- 3.3 tert-Amide with Vicinal Thiol Group -- 3.4 tert-Amide with Irreversibility -- 3.5 C-Terminal Cysteine -- 3.6 Cysteinylproline Ester (CPE) -- 3.7 Cysteinylprolylcysteine (CPC) -- 4 Protein Synthesis via N to S Acyl Shift Based on the CPE System -- Conclusions -- References -- Chemical Synthesis and Biological Function of Lipidated Proteins -- 1 Introduction -- 1.1 N-Myristoylation -- 1.2 Palmitoylation -- 1.3 Prenylation -- 1.4 GPI-Anchor Addition -- 1.5 Other Types of Lipidation -- 2 Synthesis of Lipidated Peptides -- 2.1 Preparation of Lipidated Cysteine Building Blocks -- 2.2 Solution-Phase Synthesis of Lipidated Peptides -- 2.3 Solid-Phase Approach for the Synthesis of Lipidated Peptides -- 2.4 Synthesis of Lipidated Peptides by Combined Solution/Solid-Phase Approach -- 2.4.1 Synthesis of Phosphatidylethanolaminylated Peptide -- 2.4.2 Synthesis of Sterol-Modified Peptide -- 3 Synthesis of Lipidated Proteins -- 3.1 Assisted Solubilisation Strategy -- 3.2 Expressed Protein Ligation -- 3.3 MIC Ligation -- 3.4 Diels-Alder Ligation -- 3.5 Click Ligation -- 3.6 Sortase-Mediated Protein Ligation -- 4 Chemical Biology of Lipidated Protein -- 4.1 Cell Biological Studies of S-Palmitoylation Cycle of Ras GTPases -- 4.2 Biophysical Studies of Lipidated Ras GTPases -- 4.3 Structural Studies of Prenylated Rheb GTPases -- 4.4 Thermodynamic Basis of Rab GTPases Membrane Targeting -- 4.5 Biological Function of GPI-Anchors. , 4.6 Function of LC3-PE in Autophagosome Formation -- 5 Conclusions and Perspectives -- References -- Protein Chemical Synthesis in Drug Discovery -- 1 Introduction -- 2 A Brief History of Modern Chemical Protein Synthesis -- 2.1 Peptide Chemistry in the Early Years, 1880s-1950s -- 2.2 Solid-Phase Peptide Synthesis (SPPS), 1960s-1980s -- 2.3 Protein Synthesis by Peptide Ligation, 1990s-Present -- 2.4 Analytical Methods -- 3 Key Chemistries for Modern Chemical Protein Synthesis -- 3.1 Native Chemical Ligation -- 3.2 Preparation of Peptide C-Terminal Thioesters -- 3.2.1 Preparation of Peptide C-Terminal Thioester by Boc-SPPS -- 3.2.2 Preparation of Peptide C-Terminal Thioesters by Fmoc-SPPS -- 3.2.3 Preparation of Protein C-Terminal Thioesters by Expressed Protein Ligation -- 3.3 Ligation at Non-Cys Junctions -- 3.3.1 Thiol Handle-Mediated Ligation at Non-Cys Junction -- 3.3.2 Thiol Handle-Free Ligation at Non-Cys Junction -- 3.4 Multiple Segment Ligation Strategies -- 3.5 The Folding of a Synthetic Protein -- 4 Applications of Protein Chemical Synthesis to Drug Discovery -- 4.1 Chemical Synthesis of d-Proteins and Their Application to Drug Discovery -- 4.1.1 Mirror Image Phage-Display -- 4.1.2 Racemic Protein Crystallization -- 4.2 Chemical Synthesis of Enzymes -- 4.3 Protein Pharmaceuticals -- 4.3.1 Chemical Synthesis of Erythropoietin -- 4.3.2 Chemical Synthesis of Insulin -- 5 Conclusion -- References -- Applications of Chemical Ligation in Peptide Synthesis via Acyl Transfer -- 1 Introduction to Native Chemical Ligation -- 2 Solid Phase vs Solution Phase Chemical Ligation -- 3 Intramolecular Chemical Ligation (Acyl Migration) -- 3.1 S- to N-Acyl Migration -- 3.2 O- to N-Acyl Migrations -- 3.3 N- to N-Acyl Migrations -- 4 Applications of Native Chemical Ligation -- 4.1 Synthesis of Cyclic Peptides -- 4.2 Synthesis of Glycopeptides. , 5 Computational Rationalization of Chemical Ligation -- 6 Conclusions -- References -- Index.
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  • 5
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 4143-4151 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present a critical theoretical study of electronic properties of silicon nanoclusters, in particular the roles played by symmetry, relaxation, and hydrogen passivation on the stability, the gap states and the energy gap of the system using the order N [O(N)] nonorthogonal tight-binding molecular dynamics and the local analysis of electronic structure. We find that for an unrelaxed cluster with its atoms occupying the regular tetrahedral network, the presence of undistorted local bonding configuration is sufficient for the appearance of a small clean energy gap. However, the energy gap of the unrelaxed cluster does not start at the highest occupied molecular orbital (HOMO). In fact, between the HOMO and the lower edge of the energy gap, localized dangling bond states are found. With hydrogen passivation, the localized dangling bond states are eliminated, resulting in a wider and clean energy gap. Relaxation of these hydrogen passivated clusters does not alter either the structure or the energy gap appreciably. However, if the silicon clusters are allowed to relax first, the majority of the dangling bonds are eliminated but additional defect states due to bond distortion appear, making the energy gap dirty. Hydrogen passivation of these relaxed clusters will further eliminate most of the remnant dangling bonds but no appreciable effect on the defect states associated with bond distortions will take place, thus still resulting in a dirty gap. For the hydrogen-passivated SiN nanoclusters with no bond distortion and no overall symmetry, we have studied the variation of the energy gap as a function of size of the cluster for N in the range of 80〈N〈6000. The dependence of the energy gap on the size shows similar behavior to that for silicon nanoclusters with no bond distortion but possessing overall symmetry. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: Malignant gliomas, the most common form of primary brain tumors, are highly dependent on the mevalonate (MVA) pathway for the synthesis of lipid moieties critical to cell replication. Human glioblastoma cells were found to be uniquely vulnerable to growth arrest by lovastatin, a competitive inhibitor of the enzyme regulating MVA synthesis, 3-hydroxy-3-methylglutaryl coenzyme A reductase. The sodium salt of phenylacetic acid (NaPA), an inhibitor of MVA-pyrophosphate decarboxylase, the enzyme that controls MVA use, acted synergistically with lovastatin to suppress malignant growth. When used at pharmacologically attainable concentrations, the two compounds induced profound cytostasis and loss of malignant properties such as invasiveness and expression of the transforming growth factor-β2 gene, coding for a potent immunosuppressive cytokine. Supplementation with exogenous ubiquinone, an end product of the MVA pathway, failed to rescue the cells, suggesting that decreased synthesis of intermediary products are responsible for the antitumor effects observed. In addition to blocking the MVA pathway, lovastatin alone and in combination with NaPA increased the expression of the peroxisome proliferator-activated receptor, a transcription factor implicated in the control of lipid metabolism, cell growth, and differentiation. Our results indicate that targeting lipid metabolism with lovastatin, used alone or in combination with the aromatic fatty acid NaPA, may offer a novel approach to the treatment of malignant gliomas.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 752 (1995), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 638 (1991), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food quality 23 (2000), S. 0 
    ISSN: 1745-4557
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Oral particles are produced when the tongue is pulled away from the palate and when the lips are parted (Kao et al. 1998). To explore the role of oral particles on flavor perception, experiments were designed to compare the perception of some food flavors under conditions that produce and do not produce oral particles. The minimum perceptible concentrations of 2-pentanone, 2-heptanone, and 2-nonanone were determined when observers held their mouthparts still and when they were allowed to move their lips and tongues. The minimum perceptible concentration with mouthparts still was significantly higher than that with mouthparts moving. Flavor descriptors applied to mixtures of amino acids, salts and flavor potentiators, which were designed to simulate crab flavor, also shifted substantially when tasted with still versus moving mouthparts. The differences observed with still and moving mouthparts support the hypothesis that oral particles strongly influence flavor perception.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 116 (1994), S. 6745-6747 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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