Mitchell Omar

Photo of Mitchell Omar, Extension

Mitchell Omar

Assistant Professor

Summary

My interests focus on molecular organization in human health and disease. With a billion proteins packed into a cell, cross-talk and non-specific interactions should dominate. However, cells have evolved subcellular organizational strategies to overcome this. Two crucial strategies are protein complexes and subcellular localization.

How do protein complexes and subcellular localization control important cell signaling?

How do mutations that disrupt this organization cause disease?

Our current efforts are working to understand the molecular events that underlie stress hormone production by the adrenal glands and how mutations to protein kinase A (PKA) drive stress hormone overproduction and tumor growth. Another major project in the lab is investigating the neural functions of a PKA-anchoring protein associated with psychiatric disease. Commonly used techniques include DNA cloning, cell culture, and cell-based biochemistry, as well as live-cell fluorescent imaging, proximity proteomics, and CRISPR gene-editing. Ultimately, we intend to reveal cellular and molecular mechanisms governing vital physiology and to identify new strategies to ameliorate and prevent human disease. 

Education

B.A. English, Minnesota State University Moorhead, 2007
B.S. Biology, University of Iowa, 2011
Ph.D. Neuroscience, Yale University, 2017

News & Journal Articles, Fact Sheets, Reports...

Book Chapter(s)
Biochemical Analysis of AKAPanchored PKA Signaling Complexes Byrne D.P., Omar M.H., Kennedy E.J., Eyers P.A., Scott J.D. 2022, Methods in Molecular Biology (Clifton, NJ). cAMP Signaling: Methods and Protocols, Second Edition. Manuela Zaccolo, ed.
Journals
Anti-diuretic hormone ITP signals via a guanylate cyclase receptor to modulate systemic homeostasis in Drosophila
This important study provides a comprehensive analysis of ITP neuropeptide and its role as an anti-diuretic and metabolic hormone in the fruit fly Drosophila.
Jayati Gera, Marishia Agard, Hannah Nave, Austin B Baldridge, Farwa Sajadi, Leena Thorat, Theresa H McKim, Shu Kondo, Dick R Nässel, Mitchell H Omar, Jean-Paul Paluzzi and Meet Zandawala 2025, eLife
Recruitment of BAG2 to DNAJ-PKAc scaffolds promotes cell survival and resistance to drug-induced apoptosis in fibrolamellar carcinoma Lauer, S.M., Omar, M.H., Golkowski M., Kenerson H.L., Pascual B.C., Forbush K., Smith F.D., Gordon J., Ong S.-E., Yeung R.S., Scott J.D 2024, Cell Reports, Vol. 43 Issue 2
Discovery of a Cushing’s syndrome protein kinase A mutant that biases signaling through type I AKAPs Mitchell H. Omar, Dominic P. Byrne, Safal Shrestha, Tyler M. Lakey, Kyung-Soon Lee, Sophia M. Lauer, Kerrie B. Collins, Leonard A. Daly, Claire E. Eyers, Geoffrey S. Baird, Shao-En Ong, Natarajan Kannan, Patrick A. Eyers, John D. Scott 2024, Science Advances, Vol. 10 Issue 8
Classification of Cushing’s syndrome PKAc mutants based upon their ability to bind PKI. Omar M.H.*, Kihiu M.* (*co-first authors), Byrne D.P., Lee K.-S., Lakey T.M., Butcher E., Eyers P.A., Scott J.D. 2023, Biochemical Journal 480(12):875-890
Proximity biotinylation to define the local environment of the protein kinase A catalytic subunit in adrenal cells Omar M.H., Lauer S.M., Lau H.-T., Golkowski M., Ong S.-E., Scott J.D. 2023, STAR Protocols 4(1):101992
Mislocalization of protein kinase A drives pathology in Cushing’s syndrome Omar M.H., et.al. 2022, Cell Reports 40. 10.1016
Targeting an anchored phosphatase-deacetylase unit restores renal ciliary homeostasis Gopalan J., Omar M.H., Roy A., Cruz N.M., Falcone J., Jones K.N., Forbush K.A., Himmelfarb J., Freedman B.S., Scott J.D. 2021, eLife 10, e67828
AKAP Signaling Islands: Venues for Precision Pharmacology Omar M.H., Scott J.D. 2020, Trends in Pharmacological Sciences 41, 933-946
An acquired scaffolding function of the DNAJ-PKAc fusion contributes to oncogenic signaling in fibrolamellar carcinoma. Turnham R.E., Smith F.D., Kenerson H.L., Omar M.H., Golkowski M., Garcia I., Bauer R., Lau H.-T., Sullivan K.M., Langeberg L.K., Ong S.-E., Riehle K.J., Yeung R.S., Scott J.D. 2019, eLife 8:e44187
Single nucleotide polymorphisms alter kinase anchoring and the subcellular targeting of A-kinase anchoring proteins. Smith F.D., Omar M.H., Nygren P.J., Soughayer J., Hoshi N., Lau H.-T., Snyder C.G., Branon T.C., Ghosh D., Langeberg L.K., Ting A.Y., Santana L.F., Ong S.-E., Navedo M.F., Scott J.D. 2018, PNAS, 115 (49) E11465-E11474
CNS Neurons Deposit Laminin a5 to Stabilize Synapses Omar, M.H., Campbell, M.K., Xiao, X., Zhong, Q., Brunken, W.J., Miner, J.H., Greer, C.A., and Koleske, A.J. 2017, Cell Reports
Corticosteroid-induced dendrite loss and behavioral deficiencies can be blocked by activation of Abl2/Arg kinase. Shapiro L.P.*, Omar M.H.* (*co-first authors), Koleske A.J., Gourley S.L. 2017, Molecular and Cellular Neuroscience
Long-Term Live-Cell STED Nanoscopy of Primary and Cultured Cells with the Plasma Membrane HIDE Probe DiI-SiR. Thompson A.D., Omar M.H., Rivera-Molina F., Xi Z., Koleske A.J., Derek Toomre D., Schepartz A. 2017, Angewandte Chemie
Reciprocal stabilization of ABL and TAZ regulates osteoblastogenesis through transcription factor RUNX2. Matsumoto Y., La Rose J., Kent O.A., Wagner M.J., Narimatsu M., Levy A.D., Omar M.H., Tong J., Krieger J.R., Riggs E., Storozhuk Y., Pasquale J., Ventura M., Yeganeh B., Post M., Moran M.F., Grynpas M.D., Wrana J.L., Superti-Furga G., Koleske A.J., Pendergast A.M., Rottapel R. 2016, Journal of Clinical Investigation
Extracellular matrix control of dendritic spine and synapse structure and plasticity in adulthood. Levy A.D.*, Omar M.H.* (*co-first authors), Koleske, A. J. 2014, Frontiers in Neuroanatomy