Since its inception in FY2012, the mass spectrometry facility within CPTR collaborated in 15 different projects and analyzed more than 650 samples. Those projects address a variety of biological questions addressed primarily by one of two applications of protein mass spectrometry. One of the most common uses is to identify the entire proteome of a specific sample, such as an organelle, or to identify enriched protein interactors. We have collaborated of seven projects of this type, among them: characterization of the proteome of organelles purified from vegetative and developing Dictyostelium;identification of protein interactors of Arf-GAP proteins;identification of interactors of the delta133 isoform of p53;relative quantitation of secreted proteomes;and protein targets of a small molecule inhibitor. Mass spectrometry analysis is also a leading method to identify sites of post-translational modification on proteins. We have worked on six projects that involve identification protein modifications, including ubiquitination, hosphorylation, methylation, acetylation, and covalent modification by a two different small molecule inhibitors. Currently, many of these projects are still ongoing. Thus far, they have produced very interesting results for the collaborator and suggested specific hypotheses to be tested in follow-up experiments.

National Institute of Health (NIH)
National Cancer Institute (NCI)
Scientific Cores Intramural Research (ZIC)
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National Cancer Institute Division of Basic Sciences
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Chen, Pei-Wen; Jian, Xiaoying; Heissler, Sarah M et al. (2016) The Arf GTPase-activating Protein, ASAP1, Binds Nonmuscle Myosin 2A to Control Remodeling of the Actomyosin Network. J Biol Chem 291:7517-26
Kumar, Jeyan S; Miller Jenkins, Lisa M; Gottesman, Michael M et al. (2016) The Drug Excipient Cyclodextrin Interacts With d-Luciferin and Interferes With Bioluminescence Imaging. Mol Imaging 15:
Appella, Ettore; Jenkins, Lisa M Miller; Guengerich, F Peter (2015) Introduction to thematic series: protein interactions, structures, and networks. J Biol Chem 290:26393-4
Wang, Rui-Hong; Lahusen, Tyler J; Chen, Qiang et al. (2014) SIRT1 deacetylates TopBP1 and modulates intra-S-phase checkpoint and DNA replication origin firing. Int J Biol Sci 10:1193-202
Horikawa, Izumi; Fujita, Kaori; Jenkins, Lisa M Miller et al. (2014) Autophagic degradation of the inhibitory p53 isoform Δ133p53α as a regulatory mechanism for p53-mediated senescence. Nat Commun 5:4706
Hall, Matthew D; Marshall, Travis S; Kwit, Alexandra D T et al. (2014) Inhibition of glutathione peroxidase mediates the collateral sensitivity of multidrug-resistant cells to tiopronin. J Biol Chem 289:21473-89
Humbard, Matthew A; Surkov, Serhiy; De Donatis, Gian Marco et al. (2013) The N-degradome of Escherichia coli: LIMITED PROTEOLYSIS IN VIVO GENERATES A LARGE POOL OF PROTEINS BEARING N-DEGRONS. J Biol Chem 288:28913-24