Success Story

June 3, 2019  |  Jola Glotzer

Proteomics of 3D cell cultures

A new method to study proteomics across multilayer cell cultures developed by Bethany Perez-White and Spiro Getsios, in part supported by a CBC Postdoctoral Research Award

Bethany Perez-White, NU

A new publication that acknowledges funding in part by the CBC has recently appeared in Methods in Molecular Biology and is titled “Biotin Identification Proteomics in Three-Dimensional Organotypic Human Skin Cultures.”

The CBC support for this research came from a CBC Postdoctoral Research Award (2014; renewed for 2015) to Bethany Perez-White, NU, who is senior author on the paper. At the time, Bethany was a postdoc in Spiro Getsios’ lab, NU — a co-author on the paper. Thomas Paul, who also participated in the published study has similarly strong ties to the CBC – for six consecutive years (2010-2015), Thomas taught at the CBC Summer Workshops in Proteomics and Informatics. The CBC congratulates all involved in the current study.

Publication attributed to CBC funding*:

Cable CJ, Kaplan N, Getsios S, Thomas PM, Perez White BE. Biotin Identification Proteomics in Three-Dimensional Organotypic Human Skin Cultures. Methods Mol Biol. 2019 May 24. [Epub ahead of print] (PubMed)


Biotin identification (BioID) proteomics facilitates the unbiased detection of protein interaction neighborhoods in live cells. The BioID technique relies on the covalent biotin alteration of vicinal proteins by a modified bacterial biotin ligase. The biotin ligase is fused to a protein of interest to identify putative protein-protein interactions. Here, we describe the adaptation of this technique for use in three-dimensional epidermal cultures. Due to the covalent biotin modification of proteins, our protocol allows for the complete solubilization of the total cellular protein content in differentiated keratinocytes. Thus, a comprehensive network of potential interactors of a protein of interest can be mapped.

Expression of EphA2-BirA* fusion protein in 2D and 3D primary epidermal keratinocyte cultures detected by HA-tag (green) and distribution of biotinylated proteins as shown by streptavidin reactivity (red). (Source:


This work was supported by NIH grant AR072773, a Dermatology Foundation Career Development Award grant, and a Chicago Biomedical Consortium Postdoctoral Award to B.E.P.W. and NIH grant AR062110 to S.G. Work was performed with the support of the Northwestern University Skin Disease Research Center funded by NIH grant AR057216 and Northwestern Proteomics funded by NIH grants CA060553 and GM108569.

Featured CBC Community member(s):

Bethany Perez White and Spiro Getsios, NU

Paul Thomas, NU
  • CBC Summer Workshops in Proteomics and Informatics (2010, 2011, 2012, 2013, 2014, 2015)
    Paul Thomas (NU) – Workshop Lecturer


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