SPATIAL CONTROL OF INTRACELLULAR SIGNALING (Lee Bardwell, Theme Leader) | Some of the greatest mysteries in biological spafial dynamics lie at the subcellular level. The successes of biochemical and reconstitution-based assays in explaining fundamental mechanisms of cell biology have madeit easy to lose sight of the fact that cells are not just bags of well-sfirred enzymes. With respect to intracellular signaling pathways, there is growing evidence that spatial control is crucial to normal function [192-194] and occurs at many scales: compartments (plasma memtjrane, nucleus);sub-compartments (e.g. membrane rafts and nuclear speckles) and, below these levels, the nano-spafial scale, defined by local tethering interactions. Such spatial regulation is necessarily dynamic: scaffold proteins move to the plasma membrane, kinases and transcription factors move into or out of the nucleus, tethering interactions are regulated by phosphorylation, etc. In addifion, motor-based transport is used both to construct compartments, and to transport signaling molecules during sfimulafion;in turn this transport is regulated by extra- and intracellular cues. Yet for all the evidence that space matters, we often know less about spatial dynamics inside cells than outside of them. We propose three projects that deal with distinct,aspects of intracellular spatial dynamics, but are linked by their reliance on novel, cutting-edge optical, bioinformatic, and modeling methodologies. All three seek to open new lines of inquiry and, as such, incur more than a little technical risk. We believe the risks are justified by the expected gains in discovery and understanding in such a pooriy understood, yet extremely important, area.

National Institute of Health (NIH)
National Institute of General Medical Sciences (NIGMS)
Specialized Center (P50)
Project #
Application #
Study Section
Special Emphasis Panel (ZGM1-CBCB-3)
Project Start
Project End
Budget Start
Budget End
Support Year
Fiscal Year
Total Cost
Indirect Cost
University of California Irvine
United States
Zip Code
Kang, Dong-Ku; Ali, M Monsur; Zhang, Kaixiang et al. (2014) Rapid detection of single bacteria in unprocessed blood using Integrated Comprehensive Droplet Digital Detection. Nat Commun 5:5427
Seiler, Magdalene J; Aramant, Robert B; Jones, Melissa K et al. (2014) A new immunodeficient pigmented retinal degenerate rat strain to study transplantation of human cells without immunosuppression. Graefes Arch Clin Exp Ophthalmol 252:1079-92
Pate, Kira T; Stringari, Chiara; Sprowl-Tanio, Stephanie et al. (2014) Wnt signaling directs a metabolic program of glycolysis and angiogenesis in colon cancer. EMBO J 33:1454-73
Annibale, Paolo; Gratton, Enrico (2014) Advanced fluorescence microscopy methods for the real-time study of transcription and chromatin dynamics. Transcription 5:
Paladino, Simona; Lebreton, St├ęphanie; Tivodar, Simona et al. (2014) Golgi sorting regulates organization and activity of GPI proteins at apical membranes. Nat Chem Biol 10:350-7
Lei, Jinzhi; Levin, Simon A; Nie, Qing (2014) Mathematical model of adult stem cell regeneration with cross-talk between genetic and epigenetic regulation. Proc Natl Acad Sci U S A 111:E880-7
Conesa, Ana; Mortazavi, Ali (2014) The common ground of genomics and systems biology. BMC Syst Biol 8 Suppl 2:S1
Bonaventura, Gabriele; Barcellona, Maria Luisa; Golfetto, Ottavia et al. (2014) Laurdan monitors different lipids content in eukaryotic membrane during embryonic neural development. Cell Biochem Biophys 70:785-94
Holmes, William R (2014) An efficient, nonlinear stability analysis for detecting pattern formation in reaction diffusion systems. Bull Math Biol 76:157-83
Aland, Sebastian; Egerer, Sabine; Lowengrub, John et al. (2014) Diffuse interface models of locally inextensible vesicles in a viscous fluid. J Comput Phys 277:32-47

Showing the most recent 10 out of 176 publications