This subproject is one of many research subprojects utilizing theresources provided by a Center grant funded by NIH/NCRR. The subproject andinvestigator (PI) may have received primary funding from another NIH source,and thus could be represented in other CRISP entries. The institution listed isfor the Center, which is not necessarily the institution for the investigator.The investigation of light-driven signal generation/transduction in light-harvesting protein systems of photosynthetic lower eukaryotes and bacteria is of a wide biological interest. Major progress has been made in understanding the mechanism of generation of an initial signal. However, the main question still remains unanswered: what are the pathways of signal transduction in response to such environmental stimuli as light? In this proposal we address the problem of the molecular mechanism of light-driven signal transduction in light-sensing protein systems. As a representative system we have chosen Avena sativa (oat) phototropin1 (phot1). Phot1 is a plasma membrane-associated flavoprotein that functions as the primary photoreceptor mediating phototropic plant movement, phototropism. Phot1 is composed of two N-terminal light, oxygen, voltage (LOV) sensor domains, denoted LOV1 and LOV2, and an effector C-terminal Ser/Thr kinase domain. The molecular mechanism of signal transduction in phot1 may reveal how the system controls phototropism at the molecular level. Moreover, the project offers the opportunity to compare different folds of LOV domain proteins and reveal common aspects of their signal transduction mechanisms. That is, we can highlight an evolutionarily-conserved pathway of long-range structural connectivity leading from the LOV domain(s) to the effector domain(s) or protein-interaction partners.
| Weingarten, Adam S; Dannenhoffer, Adam J; Kazantsev, Roman V et al. (2018) Chromophore Dipole Directs Morphology and Photocatalytic Hydrogen Generation. J Am Chem Soc 140:4965-4968 |
| Yang, Cheolhee; Choi, Minseo; Kim, Jong Goo et al. (2018) Protein Structural Dynamics of Wild-Type and Mutant Homodimeric Hemoglobin Studied by Time-Resolved X-Ray Solution Scattering. Int J Mol Sci 19: |
| Kazantsev, Roman V; Dannenhoffer, Adam J; Weingarten, Adam S et al. (2017) Crystal-Phase Transitions and Photocatalysis in Supramolecular Scaffolds. J Am Chem Soc 139:6120-6127 |
| Fournier, Bertrand; Sokolow, Jesse; Coppens, Philip (2016) Analysis of multicrystal pump-probe data sets. II. Scaling of ratio data sets. Acta Crystallogr A Found Adv 72:250-60 |
| Cho, Hyun Sun; Schotte, Friedrich; Dashdorj, Naranbaatar et al. (2016) Picosecond Photobiology: Watching a Signaling Protein Function in Real Time via Time-Resolved Small- and Wide-Angle X-ray Scattering. J Am Chem Soc 138:8815-23 |
| Pande, Kanupriya; Hutchison, Christopher D M; Groenhof, Gerrit et al. (2016) Femtosecond structural dynamics drives the trans/cis isomerization in photoactive yellow protein. Science 352:725-9 |
| Weingarten, Adam S; Kazantsev, Roman V; Palmer, Liam C et al. (2015) Supramolecular Packing Controls H? Photocatalysis in Chromophore Amphiphile Hydrogels. J Am Chem Soc 137:15241-6 |
| Pfoh, Roland; Pai, Emil F; Saridakis, Vivian (2015) Nicotinamide mononucleotide adenylyltransferase displays alternate binding modes for nicotinamide nucleotides. Acta Crystallogr D Biol Crystallogr 71:2032-9 |
| Mariette, Céline; Guérin, Laurent; Rabiller, Philippe et al. (2015) The creation of modulated monoclinic aperiodic composites in n-alkane/urea compounds. Z Kristallogr Cryst Mater 230:5-11 |
| Yang, Xiaojing; Stojkovi?, Emina A; Ozarowski, Wesley B et al. (2015) Light Signaling Mechanism of Two Tandem Bacteriophytochromes. Structure 23:1179-89 |
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