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Nagai-Okatani C, Tominaga D, Tomioka A, Sakaue H, Goda N, Ko S, Kuno A, Kaji H. GRable version 1.0: A software tool for site-specific glycoform analysis with improved MS1-based glycopeptide detection with parallel clustering and confidence evaluation with MS2 information. Mol Cell Proteomics 2024:100833. [PMID: 39181535 DOI: 10.1016/j.mcpro.2024.100833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 08/16/2024] [Accepted: 08/19/2024] [Indexed: 08/27/2024] Open
Abstract
High-throughput intact glycopeptide analysis is crucial for elucidating the physiological and pathological status of the glycans attached to each glycoprotein. Mass spectrometry-based glycoproteomic methods are challenging because of the diversity and heterogeneity of glycan structures. Therefore, we developed an MS1-based site-specific glycoform analysis method named "Glycan heterogeneity-based Relational IDentification of Glycopeptide signals on Elution profile (Glyco-RIDGE)" for a more comprehensive analysis. This method detects glycopeptide signals as a cluster based on the mass and chromatographic properties of glycopeptides and then searches for each combination of core peptides and glycan compositions by matching their mass and retention time differences. Here, we developed a novel browser-based software named GRable for semi-automated Glyco-RIDGE analysis with significant improvements in glycopeptide detection algorithms, including "parallel clustering." This unique function improved the comprehensiveness of glycopeptide detection and allowed the analysis to focus on specific glycan structures, such as pauci-mannose. The other notable improvement is evaluating the "confidence level" of the GRable results, especially using MS2 information. This function facilitated reduced misassignment of the core peptide and glycan composition and improved the interpretation of the results. Additional improved points of the algorithms are "correction function" for accurate monoisotopic peak picking; one-to-one correspondence of clusters and core peptides even for multiply sialylated glycopeptides; and "inter-cluster analysis" function for understanding the reason for detected but unmatched clusters. The significance of these improvements was demonstrated using purified and crude glycoprotein samples, showing that GRable allowed site-specific glycoform analysis of intact sialylated glycoproteins on a large-scale and in-depth. Therefore, this software will help us analyze the status and changes in glycans to obtain biological and clinical insights into protein glycosylation by complementing the comprehensiveness of MS2-based glycoproteomics. GRable can be freely run online using a web browser via the GlyCosmos Portal (https://glycosmos.org/grable).
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Affiliation(s)
- Chiaki Nagai-Okatani
- Molecular and Cellular Glycoproteomics Research Group, Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan.
| | - Daisuke Tominaga
- Molecular and Cellular Glycoproteomics Research Group, Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
| | - Azusa Tomioka
- Molecular and Cellular Glycoproteomics Research Group, Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
| | - Hiroaki Sakaue
- Molecular and Cellular Glycoproteomics Research Group, Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
| | - Norio Goda
- Department of Systems Medicine, Keio University School of Medicine, Shinjuku, Tokyo 160-8582, Japan
| | - Shigeru Ko
- Department of Systems Medicine, Keio University School of Medicine, Shinjuku, Tokyo 160-8582, Japan
| | - Atsushi Kuno
- Molecular and Cellular Glycoproteomics Research Group, Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
| | - Hiroyuki Kaji
- Molecular and Cellular Glycoproteomics Research Group, Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan; Institute for Glyco-core Research (iGCORE), Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8601, Japan.
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Kanie S, Wu C, Kihira K, Yasuno R, Mitani Y, Ohmiya Y. Bioluminescence of ( R)-Cypridina Luciferin with Cypridina Luciferase. Int J Mol Sci 2024; 25:2699. [PMID: 38473946 DOI: 10.3390/ijms25052699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 02/21/2024] [Accepted: 02/24/2024] [Indexed: 03/14/2024] Open
Abstract
Cypridina luciferin (CypL) is a marine natural product that functions as the luminous substrate for the enzyme Cypridina luciferase (CypLase). CypL has two enantiomers, (R)- and (S)-CypL, due to its one chiral center at the sec-butyl moiety. Previous studies reported that (S)-CypL or racemic CypL with CypLase produced light, but the luminescence of (R)-CypL with CypLase has not been investigated. Here, we examined the luminescence of (R)-CypL, which had undergone chiral separation from the enantiomeric mixture, with a recombinant CypLase. Our luminescence measurements demonstrated that (R)-CypL with CypLase produced light, indicating that (R)-CypL must be considered as the luminous substrate for CypLase, as in the case of (S)-CypL, rather than a competitive inhibitor for CypLase. Additionally, we found that the maximum luminescence intensity from the reaction of (R)-CypL with CypLase was approximately 10 fold lower than that of (S)-CypL with CypLase, but our kinetic analysis of CypLase showed that the Km value of CypLase for (R)-CypL was approximately 3 fold lower than that for (S)-CypL. Furthermore, the chiral high-performance liquid chromatography (HPLC) analysis of the reaction mixture of racemic CypL with CypLase showed that (R)-CypL was consumed more slowly than (S)-CypL. These results indicate that the turnover rate of CypLase for (R)-CypL was lower than that for (S)-CypL, which caused the less efficient luminescence of (R)-CypL with CypLase.
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Affiliation(s)
- Shusei Kanie
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Hokkaido Center, 2-17-2-1 Tsukisamu-Higashi, Toyohira-ku, Sapporo 062-8517, Japan
| | - Chun Wu
- Biomedical Research Institute, AIST, Kansai Center, 1-8-31 Midorigaoka, Ikeda 563-8577, Japan
| | - Kiyohito Kihira
- Japan Aerospace Exploration Agency (JAXA), Tsukuba Space Center, 2-1-1 Sengen, Tsukuba 305-8505, Japan
| | - Rie Yasuno
- Cellular and Molecular Biotechnology Research Institute, AIST, Tsukuba Center, 1-1-1 Higashi, Tsukuba 305-8566, Japan
| | - Yasuo Mitani
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Hokkaido Center, 2-17-2-1 Tsukisamu-Higashi, Toyohira-ku, Sapporo 062-8517, Japan
| | - Yoshihiro Ohmiya
- Biomedical Research Institute, AIST, Kansai Center, 1-8-31 Midorigaoka, Ikeda 563-8577, Japan
- Department of Biomedical Engineering, Osaka Institute of Technology (OIT), 5-16-1 Ohmiya, Asahi-ku, Osaka 535-8585, Japan
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14-3-3 proteins are luciferases candidate proteins from lanternfish Diaphus watasei. Photochem Photobiol Sci 2023; 22:263-277. [PMID: 36197650 DOI: 10.1007/s43630-022-00311-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 09/17/2022] [Indexed: 10/10/2022]
Abstract
The lanternfish is a deep-sea fish with ventral-lateral and head photophores. It uses its ventral-lateral photophores to camouflage its ventral silhouette, a strategy called counterillumination. The bioluminescent reaction of lanternfish involves coelenterazine as a substrate luciferin but the enzyme catalyzing the bioluminescent reaction has not been identified. We report a candidate enzyme of luciferase from lanternfish Diaphus watasei. We purified the luciferase and performed SDS-PAGE analysis resulted in two bands corresponding to the activity, and following mass spectrometry analysis detected three 14-3-3 proteins of which functions is known to exhibit protein-protein interactions. The molecular weights and isoelectric points of the 14-3-3 proteins were almost consistent with the luciferase properties. The addition of two 14-3-3 binding compounds, R18 peptide and fusicoccin, resulted in the inhibition of the luciferase activity. However, the two 14-3-3 recombinant proteins showed very slight luminescence activity. These results suggested that the 14-3-3 proteins are candidate luciferases of D. watasei.
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