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Sheng Q, Xue C, Zhou Y, Li J, Yuan H, Ke Y, Lan M. Synthesis of Al 3+-doping-TiO 2 monodisperse microspheres and their application for phosphopeptides and glycopeptides enrichment. Talanta 2021; 223:121715. [PMID: 33298258 DOI: 10.1016/j.talanta.2020.121715] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 09/21/2020] [Accepted: 09/28/2020] [Indexed: 11/26/2022]
Abstract
Glycosylation and phosphorylation are two of the most common and important post-translational modifications (PTMs) of proteins, which play critical roles in regulating a variety of complex biological processes and involvement in many diseases. Due to the low abundance of phosphopeptides and glycopeptides, highly selective enrichment methods are crucial to the identification of protein phosphorylation and glycosylation by mass spectrometry (MS). Here, monodisperse uniform Al3+-doping-TiO2 mixed oxide microspheres were easily synthesized. The morphology was controlled by a sol-gel method, during the hydrothermal treatment. The obtained microspheres with uniform particle size distribution (about 1-2 μm),high surface area and improved pore structures, were characterized by SEM, TEM, XRD and N2 adsorption-desorption isotherms. Al3+-doping-TiO2 was applied in enriching glycopeptides and phosphopeptides respectively or simultaneously by using different enrichment conditions, achieving selective enrichment of glycopeptides and phosphopeptides. 20 glycopeptides and 25 phosphopeptides enriched from the tryptic digest mixtures of human serum immunoglobulin G (IgG) and α-casein (molar ratio of 1:1) were obviously observed with greatly improved signal-to-noise (S/N) ratio. Meanwhile, the enrichment results of non-fat milk and human serum also show the enrichment selectivity from complex biological samples. This study will provide a novel insight for selective enrichment of glycopeptides and phosphopeptides in post-translational modification proteomics research.
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Affiliation(s)
- Qianying Sheng
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, PR China
| | - Chenli Xue
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, PR China
| | - Yang Zhou
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, PR China
| | - Junyan Li
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, PR China
| | - Huihui Yuan
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, PR China
| | - Yanxiong Ke
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, PR China.
| | - Minbo Lan
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, PR China.
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Sheng Q, Wang C, Li X, Qin H, Ye M, Xiong Y, Wang X, Li X, Lan M, Li J, Ke Y, Qing G, Liang X. Highly Efficient Separation of Methylated Peptides Utilizing Selective Complexation between Lysine and 18-Crown-6. Anal Chem 2020; 92:15663-15670. [PMID: 33169968 DOI: 10.1021/acs.analchem.0c04158] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Protein methylation is one of the most common and important post-translational modifications, and it plays vital roles in epigenetic regulation, signal transduction, and chromatin metabolism. However, due to the diversity of methylation forms, slight difference between methylated sites and nonmodified ones, and ultralow abundance, it is extraordinarily challenging to capture and separate methylated peptides from biological samples. Here, we introduce a simple and highly efficient method to separate methylated and nonmethylated peptides using 18-crown-6 as a mobile phase additive in high-performance liquid chromatography. Selective complexation between lysine and 18-crown-6 remarkably increases the retention of the peptides on a C18 stationary phase, leading to an excellent baseline separation between the lysine methylated and nonmethylated peptides. A possible binding mechanism is verified by nuclear magnetic resonance titration, biolayer interferometry technology, and quantum chemistry calculation. Through establishment of a simple enrichment methodology, a good selectivity is achieved and four methylated peptides with greatly improved signal-to-noise (S/N) ratios are successfully separated from a complex peptide sample containing 10-fold bovine serum albumin tryptic digests. By selecting rLys N as an enzyme to digest histone, methylation information in the histone could be well identified based on our enrichment method. This study will open an avenue and provide a novel insight for selective enrichment of lysine methylated peptides in post-translational modification proteomics.
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Affiliation(s)
- Qianying Sheng
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Cunli Wang
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Xiaopei Li
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Hongqiang Qin
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Mingliang Ye
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Yuting Xiong
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Xue Wang
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Xiuling Li
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Minbo Lan
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Junyan Li
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Yanxiong Ke
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Guangyan Qing
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Xinmiao Liang
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China.,Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P. R. China
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Chen L, Ding D, Sheng Q, Yu L, Liu X, Liang X. Selective enrichment of N-linked glycopeptides and glycans by using a dextran-modified hydrophilic material. J Sep Sci 2018; 41:2003-2011. [PMID: 29333671 DOI: 10.1002/jssc.201700995] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 11/15/2017] [Accepted: 01/04/2018] [Indexed: 02/06/2023]
Affiliation(s)
- Linlin Chen
- The Fifth People's Hospital; Fudan University; Shanghai China
- Department of Pathology, School of Basic Medical Sciences; Fudan University; Shanghai China
| | - Di Ding
- Department of Pathology, School of Basic Medical Sciences; Fudan University; Shanghai China
| | - Qianying Sheng
- Shanghai Key Laboratory of Functional Materials Chemistry; East China University of Science and Technology; Shanghai China
| | - Long Yu
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
| | - Xiuping Liu
- The Fifth People's Hospital; Fudan University; Shanghai China
- Department of Pathology, School of Basic Medical Sciences; Fudan University; Shanghai China
| | - Xinmiao Liang
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
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