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Production of a site- and phosphorylation state-specific antibody

Abstract

Protein phosphorylation plays important roles in various aspects of cellular events. Visualization of site-specific phosphorylation in cells is of great importance not only to analyze spatial and temporal distribution but also to investigate biological function. Now, site- and phosphorylation state-specific antibodies are widely utilized as the most powerful tools for these analyses. This protocol details a method to produce the polyclonal version of such an antibody by immunizing a synthetic phosphopeptide corresponding to a protein phosphorylated at targeted site(s). This protocol is also applicable to the production of other types of antibodies, which specifically recognize the site-specific modification, such as acetylation, methylation and proteolysis. The protocol can be completed in 2–3 months.

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Figure 1: Design of synthetic peptides for producing each site- and phosphorylation state-specific antibody.
Figure 2: Schematic diagram showing the emulsification of adjuvant/antigen and the affinity-purification of antibodies.
Figure 3: Purification of a site- and phosphorylation state-specific antibody.
Figure 4: Characterization and utilization of a site- and phosphorylation state-specific antibody (AK8578)14 against phosphoSer857 and phosphoSer858 on inner centromere protein (INCENP).
Figure 5: Characterization and utilization of a site- and phosphorylation state-specific antibody (αPH10)16 against phosphoSer10 on histone H3.

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Acknowledgements

This work was supported in part by Grants-in-Aid for Scientific Research on Priority Areas from the Ministry of Education, Culture, Sports, Science and Technology, Japan, by Grants-in-Aid for Scientific Research from Japan Society for the Promotion of Science, by a Grant-in-aid for the Third Term Comprehensive 10-Year Strategy for Cancer Control from the Ministry of Health and Welfare, Japan, by Astellas Foundation for Research on Metabolic Disorders, by Aichi Cancer Research Foundation, by The Ichiro Kanehara Foundation and by The Mochida Memorial Foundation for Medical and Pharmaceutical Research. Protocol derived from http://dx.doi.org/10.1038/nprot.2007.31.

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Correspondence to Masaki Inagaki.

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Goto, H., Inagaki, M. Production of a site- and phosphorylation state-specific antibody. Nat Protoc 2, 2574–2581 (2007). https://doi.org/10.1038/nprot.2007.374

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