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Liu Y, Nomura K, Abe J, Kajihara Y. Recent advances on the synthesis of N-linked glycoprotein for the elucidation of glycan functions. Curr Opin Chem Biol 2023; 73:102263. [PMID: 36746076 DOI: 10.1016/j.cbpa.2023.102263] [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] [Received: 10/17/2022] [Revised: 12/05/2022] [Accepted: 12/30/2022] [Indexed: 02/05/2023]
Abstract
Glycoproteins play roles in many biological events, while, the glycan structure-function relationship has remained to be studied. In order to understand glycan function, homogeneous glycoproteins have been synthesized. This review introduced recent progress of their synthetic approaches.
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Affiliation(s)
- Yanbo Liu
- Department of Chemistry Osaka University, 1-1 Machikaneyama, Toyonaka, 560-0043 Japan
| | - Kota Nomura
- Department of Chemistry Osaka University, 1-1 Machikaneyama, Toyonaka, 560-0043 Japan
| | - Junpei Abe
- Department of Chemistry Osaka University, 1-1 Machikaneyama, Toyonaka, 560-0043 Japan
| | - Yasuhiro Kajihara
- Department of Chemistry Osaka University, 1-1 Machikaneyama, Toyonaka, 560-0043 Japan.
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Maki Y, Otani Y, Okamoto R, Izumi M, Kajihara Y. Isolation and characterization of high-mannose type glycans containing five or six mannose residues from hen egg yolk. Carbohydr Res 2022; 521:108680. [PMID: 36156417 DOI: 10.1016/j.carres.2022.108680] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 09/14/2022] [Indexed: 11/24/2022]
Abstract
High-mannose type glycans play important roles in biosynthesis of glycoproteins including glycoprotein quality control system. In the endoplasmic reticulum (ER), α1,2-mannosidases cleave several mannose (Man) residues to give small high-mannose type glycans, such as glycans containing five or six mannose residues (M5-glycan or M6-glycan). These glycans are reported to act as a signal for degradation processes of glycoproteins in the ER. In this work, we isolated the M5-glycan and the M6-glycan from delipidated egg yolk and confirmed that their structures were identical to human type glycans based on rigorous NMR experiments, suggesting the potential use for semisynthesis of glycoconjugates and glycan analysis.
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Affiliation(s)
- Yuta Maki
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan; Project Research Center for Fundamental Sciences, Graduate School of Science, Osaka University 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Yuiko Otani
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Ryo Okamoto
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan; Project Research Center for Fundamental Sciences, Graduate School of Science, Osaka University 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Masayuki Izumi
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Yasuhiro Kajihara
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan.
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