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Taguchi A. [Development of Synthetic Methodology for Mid-size Peptide Based on Disulfide Bond Formation]. YAKUGAKU ZASSHI 2023; 143:989-995. [PMID: 38044114 DOI: 10.1248/yakushi.23-00117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
Disulfide bonds in peptides contribute to the immobilization and rigidity of their structures, leading to the expression of biological activity and resistance to metabolic enzymes. In addition, disulfide bonds are important in the construction of conjugates comprising two bioactive molecules such as peptides, sugars and drugs. Therefore, new methods of disulfide bond formation contribute to a more efficient construction of disulfide products. This article reviews studies on development of synthetic methodology for disulfide bond formation by using 3-nitro-2-pyridinesulfenyl (Npys) compounds. We have developed a one-pot solid-phase disulfide ligation (SPDSL) method by using an Npys resin, which can easily afford an asymmetric disulfide bond that is generated using two types of thiol-containing components such as peptides and small molecules. The disulfide-linked conjugation between a hydrophobic molecule and a hydrophilic peptide can be easily prepared. Based on the SPDSL strategy, we also developed a disulfide-driven cyclic peptide synthesis, which represents a new strategy to prepare cyclic peptides from two different fragments. By generating a disulfide bond between two fragments, the entropically favorable intramolecular amide bond formation can be achieved, resulting in the reduction of racemization at the coupling site. We found that methyl 3-nitro-2-pyridinesulfenate (Npys-OMe) functions as a disulfide bond-forming reagent possessing mildly oxidative activity. This reagent enhances intramolecular disulfide bond formation between two thiols for the synthesis of cyclic peptides under mildly acidic conditions. As the applications of Npys-OMe, we demonstrated the disulfide bond formation on thiols-containing peptidyl resin.
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2
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Protein cysteine S-glycosylation: oxidative hydrolysis of protein S-glycosidic bonds in aqueous alkaline environments. Amino Acids 2023; 55:61-74. [PMID: 36460841 PMCID: PMC9877059 DOI: 10.1007/s00726-022-03208-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 09/13/2022] [Indexed: 12/03/2022]
Abstract
Some glycoproteins contain carbohydrates S-linked to cysteine (Cys) residues. However, relatively few S-glycosylated proteins have been detected, due to the lack of an effective research methodology. This work outlines a general concept for the detection of S-glycosylation sites in proteins. The approach was verified by exploratory experiments on a model mixture of β-S-glucosylated polypeptides obtained by the chemical transformation of lysozyme P00698. The model underwent two processes: (1) oxidative hydrolysis of S-glycosidic bonds under alkaline conditions to expose the thiol group of Cys residues; (2) thiol S-alkylation leading to thiol S-adduct formation at the former S-glycosylation sites. Oxidative hydrolysis was conducted in aqueous urea, dimethyl sulfoxide, or trifluoroethanol, with silver nitrate as the reaction promoter, in the presence of triethylamine and/or pyridine. The concurrent formation of stable protein silver thiolates, gluconic acid, and silver nanoclusters was observed. The essential de-metalation of protein silver thiolates using dithiothreitol preceded the S-labeling of Cys residues with 4-vinyl pyridine or a fluorescent reagent. The S-labeled model was sequenced by tandem mass spectrometry to obtain data on the modifications and their distribution over the protein chains. This enabled the efficiency of both S-glycosidic bonds hydrolysis and S-glycosylation site labeling to be evaluated. Suggestions are also given for testing this novel strategy on real proteomic samples.
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Taguchi A, Kobayashi K, Cui Y, Takayama K, Taniguchi A, Hayashi Y. Disulfide-Driven Cyclic Peptide Synthesis of Human Endothelin-2 with a Solid-Supported Npys-Cl. J Org Chem 2019; 85:1495-1503. [PMID: 31793782 DOI: 10.1021/acs.joc.9b02362] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We report here the synthesis of human endothelin-2, a peptide of 21 amino acid residues with two disulfide bonds, based on the novel idea of a disulfide-driven cyclic peptide synthesis (DdCPS). This synthesis has two steps: (1) a one-pot solid-phase disulfide ligation of two different sulfur-containing peptide fragments using an Npys-Cl resin and (2) intramolecular cyclization of the disulfide peptide via amide bond formation using a thioester ligation. Human endothelin-2 was obtained in a total yield of 2.2% with two such DdCPS procedures and subsequent deprotection and HPLC purification. This strategy is the basis of a new solid-phase assisted practical synthesis of cyclic disulfide peptides.
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Affiliation(s)
- Akihiro Taguchi
- Department of Medicinal Chemistry, School of Pharmacy , Tokyo University of Pharmacy and Life Sciences , 1432-1 Horinouchi , Hachioji , Tokyo 192-0392 , Japan
| | - Kiyotaka Kobayashi
- Department of Medicinal Chemistry, School of Pharmacy , Tokyo University of Pharmacy and Life Sciences , 1432-1 Horinouchi , Hachioji , Tokyo 192-0392 , Japan
| | - Yan Cui
- Department of Medicinal Chemistry, School of Pharmacy , Tokyo University of Pharmacy and Life Sciences , 1432-1 Horinouchi , Hachioji , Tokyo 192-0392 , Japan
| | - Kentaro Takayama
- Department of Medicinal Chemistry, School of Pharmacy , Tokyo University of Pharmacy and Life Sciences , 1432-1 Horinouchi , Hachioji , Tokyo 192-0392 , Japan
| | - Atsuhiko Taniguchi
- Department of Medicinal Chemistry, School of Pharmacy , Tokyo University of Pharmacy and Life Sciences , 1432-1 Horinouchi , Hachioji , Tokyo 192-0392 , Japan
| | - Yoshio Hayashi
- Department of Medicinal Chemistry, School of Pharmacy , Tokyo University of Pharmacy and Life Sciences , 1432-1 Horinouchi , Hachioji , Tokyo 192-0392 , Japan
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4
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Katayama H, Goto T. Improvement of stability of phenacyloxycarbamidomethyl (Pocam) group, a cysteine protecting group removable with zinc reduction, under acidic conditions. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2016.12.081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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5
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Yang R, Bi X, Li F, Cao Y, Liu CF. Native chemical ubiquitination using a genetically incorporated azidonorleucine. Chem Commun (Camb) 2015; 50:7971-4. [PMID: 24915456 DOI: 10.1039/c4cc03721a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A robust chemical ubiquitination method was developed. The method employed a genetically incorporated azidonorleucine as an orthogonal lysine precursor for the installation of a Gly residue bearing an Nα-auxiliary which mediated the ligation between ubiquitin(1-75)-thioester and the target protein. To demonstrate our methodology, a model protein, K48-linked diubiquitin, was synthesized with an overall yield of 35%.
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Affiliation(s)
- Renliang Yang
- Division of Structural Biology and Biochemistry, School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551.
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6
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: an update for 2009-2010. MASS SPECTROMETRY REVIEWS 2015; 34:268-422. [PMID: 24863367 PMCID: PMC7168572 DOI: 10.1002/mas.21411] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 07/16/2013] [Accepted: 07/16/2013] [Indexed: 05/07/2023]
Abstract
This review is the sixth update of the original article published in 1999 on the application of MALDI mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2010. General aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, arrays and fragmentation are covered in the first part of the review and applications to various structural typed constitutes the remainder. The main groups of compound that are discussed in this section are oligo and polysaccharides, glycoproteins, glycolipids, glycosides and biopharmaceuticals. Many of these applications are presented in tabular form. Also discussed are medical and industrial applications of the technique, studies of enzyme reactions and applications to chemical synthesis.
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Affiliation(s)
- David J. Harvey
- Department of BiochemistryOxford Glycobiology InstituteUniversity of OxfordOxfordOX1 3QUUK
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7
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Asahina Y, Nabeshima K, Hojo H. Peptidyl N-alkylcysteine as a peptide thioester surrogate in the native chemical ligation. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.01.095] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Zuo C, Tang S, Zheng JS. Chemical synthesis and biophysical applications of membrane proteins. J Pept Sci 2014; 21:540-9. [DOI: 10.1002/psc.2721] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 10/30/2014] [Accepted: 10/31/2014] [Indexed: 12/16/2022]
Affiliation(s)
- Chao Zuo
- High Magnetic Field Laboratory; Chinese Academy of Sciences; Hefei 230031 China
- Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Shan Tang
- Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Ji-Shen Zheng
- High Magnetic Field Laboratory; Chinese Academy of Sciences; Hefei 230031 China
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9
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Liu F, Mayer JP. Protein Chemical Synthesis in Drug Discovery. PROTEIN LIGATION AND TOTAL SYNTHESIS I 2014; 362:183-228. [DOI: 10.1007/128_2014_598] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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10
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Chemical synthesis of proteins using N-sulfanylethylanilide peptides, based on N-S acyl transfer chemistry. Top Curr Chem (Cham) 2014; 363:33-56. [PMID: 25467538 DOI: 10.1007/128_2014_586] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Native chemical ligation (NCL), which features the use of peptide thioesters, is among the most reliable ligation protocols in chemical protein synthesis. Thioesters have conventionally been synthesized using tert-butyloxycarbonyl (Boc)-based solid-phase peptide synthesis (SPPS); however, the increasing use of 9-fluorenylmethyloxycarbonyl (Fmoc) SPPS requires an efficient preparative protocol for thioesters which is fully compatible with Fmoc chemistry. We have addressed this issue by mimicking the naturally occurring thioester-forming step seen in intein-mediated protein splicing of the intein-extein system, using an appropriate chemical device to induce N-S acyl transfer reaction, avoiding the problems associated with Fmoc strategies. We have developed N-sulfanylethylanilide (SEAlide) peptides, which can be synthesized by standard Fmoc SPPS and converted to the corresponding thioesters through treatment under acidic conditions. Extensive examination of SEAlide peptides showed that the amide-type SEAlide peptides can be directly and efficiently involved in NCL via thioester species in the presence of phosphate salts, even under neutral conditions. The presence or absence of phosphate salts provided kinetically controllable chemoselectivity in NCL for SEAlide peptides. This allowed SEAlide peptides to be used in both one-pot/N-to-C-directed sequential NCL under kinetically controlled conditions, and the convergent coupling of large peptide fragments, which facilitated the chemical synthesis of proteins over about 100 residues. The use of SEAlide peptides, enabling sequential NCL operated under kinetically controlled conditions, and the convergent coupling, were used for the total chemical synthesis of a 162-residue monoglycosylated GM2-activator protein (GM2AP) analog.
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11
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Guan X, Chaffey PK, Zeng C, Tan Z. New Methods for Chemical Protein Synthesis. Top Curr Chem (Cham) 2014; 363:155-92. [DOI: 10.1007/128_2014_599] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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12
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Malins LR, Mitchell NJ, Payne RJ. Peptide ligation chemistry at selenol amino acids. J Pept Sci 2013; 20:64-77. [DOI: 10.1002/psc.2581] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 10/09/2013] [Accepted: 10/10/2013] [Indexed: 01/18/2023]
Affiliation(s)
- Lara R. Malins
- School of Chemistry; The University of Sydney; Sydney NSW 2006 Australia
| | | | - Richard J. Payne
- School of Chemistry; The University of Sydney; Sydney NSW 2006 Australia
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13
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Asahina Y, Kamitori S, Takao T, Nishi N, Hojo H. Chemoenzymatic Synthesis of the Immunoglobulin Domain of Tim-3 Carrying a Complex-Type N-Glycan by Using a One-pot Ligation. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303073] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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14
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Asahina Y, Kamitori S, Takao T, Nishi N, Hojo H. Chemoenzymatic Synthesis of the Immunoglobulin Domain of Tim-3 Carrying a Complex-Type N-Glycan by Using a One-pot Ligation. Angew Chem Int Ed Engl 2013; 52:9733-7. [DOI: 10.1002/anie.201303073] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 05/29/2013] [Indexed: 01/05/2023]
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15
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Katayama H, Hojo H. The phenacyl group as an efficient thiol protecting group in a peptide condensation reaction by the thioester method. Org Biomol Chem 2013; 11:4405-13. [PMID: 23715434 DOI: 10.1039/c3ob40644j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One of the condensation methods for the preparation of long-chain peptides, the so-called thioester method requires protecting groups for amino and thiol groups for regioselective ligation. In this study, we demonstrated that the phenacyl (Pac) group acts as an efficient protecting group of cysteine side chains. We synthesized a cysteine derivative carrying the Pac group at the side chain sulfur atom, and Pac-containing peptides and peptide thioesters were synthesized using it by the ordinary 9-fluorenylmethoxycarbonyl (Fmoc)-based solid-phase peptide synthesis strategy. Pac-containing peptide segments could be condensed by the thioester method. After the condensation reaction, Pac groups could be removed by Zn/AcOH treatment. In addition, the azido group, which was used for the protection of lysine side chains, was simultaneously converted into an amino group, demonstrating that this protecting group scheme simplified the deprotecting reaction after the peptide condensation reaction to a single step.
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Affiliation(s)
- Hidekazu Katayama
- Department of Applied Biochemistry, School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan.
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16
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Taichi M, Hemu X, Qiu Y, Tam JP. A thioethylalkylamido (TEA) thioester surrogate in the synthesis of a cyclic peptide via a tandem acyl shift. Org Lett 2013; 15:2620-3. [PMID: 23668312 DOI: 10.1021/ol400801k] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The cyclic cystine-knot peptide, kalata B1, was synthesized by employing a novel Fmoc-compatible thioethylalkylamido (TEA) thioester surrogate via an N-S acyl shift followed by a thiol-thioester exchange reaction. TEA thioester surrogate is cost-effective, conveniently prepared in one-step with starting materials, readily available from commercial sources, and highly efficient in preparing peptide thioesters.
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Affiliation(s)
- Misako Taichi
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551
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17
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Otaka A, Sato K, Ding H, Shigenaga A. One-Pot/Sequential Native Chemical Ligation UsingN-Sulfanylethylanilide Peptide. CHEM REC 2012; 12:479-90. [DOI: 10.1002/tcr.201200007] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Indexed: 01/05/2023]
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18
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Sakamoto K, Sato K, Shigenaga A, Tsuji K, Tsuda S, Hibino H, Nishiuchi Y, Otaka A. Synthetic Procedure for N-Fmoc Amino Acyl-N-Sulfanylethylaniline Linker as Crypto-Peptide Thioester Precursor with Application to Native Chemical Ligation. J Org Chem 2012; 77:6948-58. [DOI: 10.1021/jo3011107] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Ken Sakamoto
- Institute
of Health Biosciences and Graduate School of Pharmaceutical Sciences, The University of Tokushima, Tokushima 770-8505, Japan
| | - Kohei Sato
- Institute
of Health Biosciences and Graduate School of Pharmaceutical Sciences, The University of Tokushima, Tokushima 770-8505, Japan
| | - Akira Shigenaga
- Institute
of Health Biosciences and Graduate School of Pharmaceutical Sciences, The University of Tokushima, Tokushima 770-8505, Japan
| | - Kohei Tsuji
- Institute
of Health Biosciences and Graduate School of Pharmaceutical Sciences, The University of Tokushima, Tokushima 770-8505, Japan
| | - Shugo Tsuda
- Institute
of Health Biosciences and Graduate School of Pharmaceutical Sciences, The University of Tokushima, Tokushima 770-8505, Japan
- Saito Research Center, Peptide Institute, Inc., 7-2-9 Saito Ibaraki, Osaka
567-0085, Japan
| | - Hajime Hibino
- Saito Research Center, Peptide Institute, Inc., 7-2-9 Saito Ibaraki, Osaka
567-0085, Japan
| | - Yuji Nishiuchi
- Saito Research Center, Peptide Institute, Inc., 7-2-9 Saito Ibaraki, Osaka
567-0085, Japan
- Department
of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Akira Otaka
- Institute
of Health Biosciences and Graduate School of Pharmaceutical Sciences, The University of Tokushima, Tokushima 770-8505, Japan
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Hojo H, Tanaka H, Hagiwara M, Asahina Y, Ueki A, Katayama H, Nakahara Y, Yoneshige A, Matsuda J, Ito Y, Nakahara Y. Chemoenzymatic Synthesis of Hydrophobic Glycoprotein: Synthesis of Saposin C Carrying Complex-Type Carbohydrate. J Org Chem 2012; 77:9437-46. [DOI: 10.1021/jo3010155] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | | | | | | | | | | | | | - Yukishige Ito
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351- 0198, Japan
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20
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Zheng JS, Chang HN, Wang FL, Liu L. Fmoc synthesis of peptide thioesters without post-chain-assembly manipulation. J Am Chem Soc 2011; 133:11080-3. [PMID: 21714552 DOI: 10.1021/ja204088a] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An operationally simple method for the synthesis of peptide thioesters is developed using standard Fmoc solid-phase peptide synthesis procedures. The method relies on the use of a premade enamide-containing amino acid which, in the final TFA cleavage step, renders the desired thioester functionality through an irreversible intramolecular N-to-S acyl transfer.
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Affiliation(s)
- Ji-Shen Zheng
- Department of Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
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Synthesis of the sphingolipid activator protein, saposin C, using an azido-protected O-acyl isopeptide as an aggregation-disrupting element. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.11.154] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Katayama H, Nakahara Y, Hojo H. N-Methyl-phenacyloxycarbamidomethyl (Pocam) group: a novel thiol protecting group for solid-phase peptide synthesis and peptide condensation reactions. Org Biomol Chem 2011; 9:4653-61. [DOI: 10.1039/c1ob05253e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Hojo H, Kobayashi H, Ubagai R, Asahina Y, Nakahara Y, Katayama H, Ito Y, Nakahara Y. Efficient preparation of Fmoc-aminoacyl-N-ethylcysteine unit, a key device for the synthesis of peptide thioesters. Org Biomol Chem 2011; 9:6807-13. [DOI: 10.1039/c1ob05831b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mende F, Seitz O. 9-Fluorenylmethyloxycarbonyl-basierte Festphasensynthese von α-Peptidthioestern. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201005180] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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25
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Mende F, Seitz O. 9-Fluorenylmethoxycarbonyl-Based Solid-Phase Synthesis of Peptide α-Thioesters. Angew Chem Int Ed Engl 2010; 50:1232-40. [DOI: 10.1002/anie.201005180] [Citation(s) in RCA: 170] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2010] [Indexed: 01/26/2023]
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26
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Hojo H, Ozawa C, Katayama H, Ueki A, Nakahara Y, Nakahara Y. The Mercaptomethyl Group Facilitates an Efficient One-Pot Ligation at Xaa-Ser/Thr for (Glyco)peptide Synthesis. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000384] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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27
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Hojo H, Ozawa C, Katayama H, Ueki A, Nakahara Y, Nakahara Y. The Mercaptomethyl Group Facilitates an Efficient One-Pot Ligation at Xaa-Ser/Thr for (Glyco)peptide Synthesis. Angew Chem Int Ed Engl 2010; 49:5318-21. [DOI: 10.1002/anie.201000384] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Shigenaga A, Sato K, Otaka A. Recent Progress in the Synthetic Methodologies of Peptide Thioesters. J SYN ORG CHEM JPN 2010. [DOI: 10.5059/yukigoseikyokaishi.68.911] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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