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A strategy can be used to analyze intracellular interaction proteomics of cell-surface receptors

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Abstract

Comprehensive knowledge of the intracellular protein interactions of cell-surface receptors will greatly advance our comprehension of the underlying trafficking mechanisms. Hence, development of effective and high-throughput approaches is highly desired. In this work, we presented a strategy aiming to tailor toward the analysis of intracellular protein interactome of cell-surface receptors. We used α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptors subunit GluA1 as an example to illustrate the methodological application. To capture intracellular proteins that interact with GluA1, after surface biotinylation of the prepared hippocampal neurons and slices, the non-biotinylated protein components as intracellular protein-enriched fraction were unconventionally applied for the following co-immunoprecipitation. The co-immuno-precipitated proteins were then analyzed through mass spectrometry-based proteomics and bioinformatics platforms. The detailed localizations indicated that intracellular proteins accounted for up to 93.7 and 90.3% of the analyzed proteins in the neurons and slices, respectively, suggesting that our protein preparation was highly effective to characterize intracellular interactome of GluA1. Further, we systematically revealed the protein functional profile of GluA1 intracellular interactome, thereby providing complete overview and better comprehension of diverse intracellular biological processes correlated with the complex GluA1 trafficking. All experimental results demonstrated that our methodology would be applicable and useful for intracellular interaction proteomics of general cell-surface receptors.

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Data availability

The proteomics raw data can be found in the ProteomeXchange Consortium with the identifier PXD026268. The datasets supporting this article have been uploaded as part of the electronic supplementary materials.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 31770890 and 31570826).

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Authors and Affiliations

Authors

Contributions

YL, FY and JZ: designed the project. YL, MZ, ZL and SL: performed experiments. HL and RH: analyzed the data. YL, FY and JZ: prepared the manuscript. All authors read and approved the final manuscript.

Corresponding authors

Correspondence to Faping Yi or Jian Zhou.

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Competing interests

The authors declare no competing interests.

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The authors declare that they have no conflicts of interest.

Ethical approval

The experimental protocol was approved by the Ethical Committee of Chongqing Medical University. Animals were treated in accordance with the National Institutes of Health Guidelines for the use and care of laboratory animals.

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Handling editor: K. Wan Li.

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Supplementary Information

Below is the link to the electronic supplementary material.

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Supplementary file1 Supplementary Fig. 1 Sodium dodecyl sulfate–polyacrylamide gel electrophoresis (SDS-PAGE) band pattern of the co-immunoprecipitation (co-IP) protein samples from the experimental (Exp) and control groups. Protein bands were excised to five gel slices per lane and subjected to gel-based tandem mass spectrometry (GeLC–MS/MS) analysis (TIF 7889 KB)

726_2022_3223_MOESM2_ESM.xlsx

Supplementary file2 Supplementary Table 1 All proteins identified from the hippocampal neurons and slices in the experimental (Exp) and control groups of the co-immuno-precipitation (co-IP) experiment. The two samples from independent experiments were prepared for each group. Each sample in duplicate was analyzed by solution-based tandem mass spectrometry (SoLC–MS/MS) and gel-based tandem mass spectrometry (GeLC–MS/MS). To eliminate non-specific bindings of Protein G agarose beads, the total proteins identified in the two control samples by the two proteomic approaches were excluded from the list of the experimental group (XLSX 487 KB)

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Supplementary file3 Supplementary Table 2 Mass spectrometry (MS)-based identification information of GluA1 in solution-based tandem mass spectrometry (SoLC–MS/MS) and gel-based tandem mass spectrometry (GeLC–MS/MS) analyses (XLSX 11 KB)

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Supplementary file4 Supplementary Table 3 Intracellular localizations of the potential GluA1-interacting proteins identified from the hippocampal neurons and slices. The analysis was conducted using seven bioinformatics tools: OmicsBean, g:Profiler, BINGO, STRING, PANTHER, DAVID and KOBAS (XLSX 78 KB)

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Supplementary file5 Supplementary Table 4 Enrichment results of gene ontology (GO) annotations in biological process and molecular function, and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway terms of the identified potential GluA1-interacting proteins. The significantly enriched items were shown in yellow (XLSX 492 KB)

726_2022_3223_MOESM6_ESM.xlsx

Supplementary file6 Supplementary Table 5 Summary of the potential GluA1-interacting proteins identified in the present study (with literature evidence) (XLSX 30 KB)

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Liu, Y., Zhang, M., Liu, Z. et al. A strategy can be used to analyze intracellular interaction proteomics of cell-surface receptors. Amino Acids 55, 263–273 (2023). https://doi.org/10.1007/s00726-022-03223-8

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  • DOI: https://doi.org/10.1007/s00726-022-03223-8

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