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Background

Cell biologists face the need to rapidly analyse their proteins of interest in order to gain insight into their function. Often protein purification, cellular localisation and Western blot analyses can be multi-step processes, where protein is lost, activity is destroyed or effective antibodies have not yet been generated.

Aim

To develop a method that simplifies the critical protein analytical steps of the laboratory researcher, leading to easy, efficient and rapid protein purification, cellular localisation and quantification.

Results

We have tagged the SMC2 subunit of the condensin complex with the Streptavidin-Binding Peptide (SBP), optimising and demonstrating the efficacious use of this tag for performing these protein analytical steps. Based on silver staining, and Western analysis, SBP delivered an outstanding specificity and purity of the condensin complex. We also developed a rapid and highly specific procedure to localise SBP-tagged proteins in cells in a single step procedure thus bypassing the need for using antibodies. Furthermore we have shown that the SBP tag can be used for isolating tagged proteins from chemically cross-linked cell populations for capturing DNA-protein interactions.

Conclusions

The small 38-amino acid synthetic SBP offers the potential to successfully perform all four critical analytical procedures as a single step and should have a general utility for the study of many proteins and protein complexes."xsd:string
http://purl.uniprot.org/citations/21194474http://purl.org/dc/terms/identifier"doi:10.1186/1471-2091-11-50"xsd:string
http://purl.uniprot.org/citations/21194474http://purl.uniprot.org/core/author"Kim J.H."xsd:string
http://purl.uniprot.org/citations/21194474http://purl.uniprot.org/core/author"Hudson D.F."xsd:string
http://purl.uniprot.org/citations/21194474http://purl.uniprot.org/core/author"Choo K.H."xsd:string
http://purl.uniprot.org/citations/21194474http://purl.uniprot.org/core/author"Kalitsis P."xsd:string
http://purl.uniprot.org/citations/21194474http://purl.uniprot.org/core/author"Chang T.M."xsd:string
http://purl.uniprot.org/citations/21194474http://purl.uniprot.org/core/author"Graham A.N."xsd:string
http://purl.uniprot.org/citations/21194474http://purl.uniprot.org/core/date"2010"xsd:gYear
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http://purl.uniprot.org/citations/21194474http://purl.uniprot.org/core/title"Streptavidin-Binding Peptide (SBP)-tagged SMC2 allows single-step affinity fluorescence, blotting or purification of the condensin complex."xsd:string
http://purl.uniprot.org/citations/21194474http://purl.uniprot.org/core/volume"11"xsd:string
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