A collaborative work from the Qiang and An groups has recently been published on PNAS.
This work describes the studies of thermodynamic intermediate states of interactions
between pH-Low insertion (pHLIP) peptides and membrane bilayers, using advanced solid-state
NMR spectroscopy. A multi-stage pH-modulated membrane insertion model for pHLIP peptides
was proposed. Graduate and undergraduate students S. Otieno, S. Hanz, B. Chakravorty
from the Qiang group, and graduate students A. Zhang and L. Klees from the An group
contributed to this work.
S.A. Otieno, S.Z. Hanz, B. Chakravorty, A. Zhang, L.M. Klees, M. An, and W. Qiang,
pH-dependent thermodynamic intermediates of pHLIP membrane insertion determined by
solid-state NMR spectroscopy. Proc. Natl. Acad. Sci. U.S.A., 2018, 115(48), 12194-12199.
The Fang group, in collaboration with researchers from Cornell and NTU, recently reported
their observation of phase transitions of formamidinium lead iodide (FAPbI3) under pressure. The article was just accepted by J. Am. Chem. Soc. FAPbI3 is a hybrid compound, consisting of a perovskite alpha-phase and hexagonal (non-perovskite)
delta-phase. Study on the pressure-induced structural evolution of this organic-inorganic
compound is a hot topic. For the first time, the authors determined that the pressure
could accelerate the alpha- to delta-FAPbI3 transformation.
Shaojie Jiang, Yiliang Luan, Joon I. Jang, Tom Baikie, Xin Huang, Ruipeng Li, Felix
O. Saouma, Zhongwu Wang, Timothy J. White and Jiye Fang, Phase Transitions of Formamidinium
Lead Iodide Perovskite under Pressure, J. Am. Chem. Soc., 2018, 140(42), 13952-13957.
The honor thesis research of an undergraduate student Vladislav Roytman is the subject
of a recent publication in Chem. Eur. J. from the Vetticatt group at Binghamton University.
This paper details the use of 13C kinetic isotope effects and DFT calculations as a novel probe to distinguish between
of enol and enamine mechanisms in aminocatalysis.
Roytman, V. A.; Karugu, R. W.; Hong, Y.; Hirschi, J. S.; Vetticatt, M. J. 13C Kinetic Isotope Effects as a Quantitative Probe To Distinguish between Enol and
Enamine Mechanisms in Aminocatalysis Chem. Eur. J.2018, 24(32), 8098-8102.
A recent publication in J. Am. Chem. Soc. from the Vetticatt/Hirschi groups at Binghamton
University in collaboration with the Lambert group at Cornell University reports on
a novel mode of asymmetric induction in chiral Brønsted acid catalysis. Computational
exploration of the origin of enantioselectivity reveals a unique point-chirality-induced
helical chirality of the catalyst dictates the enantioselectivity of an inverse electron
demand Diels Alder reaction.
Rozners group in collaboration with Dharmacon, Vandebilt and Rochester researchers
recently reported in ACS Chemical Biology that replacement of a single phosphate linkage
between the first and second nucleosides of the passenger strand of a short interfering
RNA with an amide linkage almost completely abolished its undesired activity and restored
the desired activity of guide strands that had been compromised by unfavorable amide
modifications. Eliminating off-target activity of the passenger strand will be important
for improving therapeutic potential of short interfering RNAs.
Citation: Hardcastle, T., Novosjolova, I., Kotikam, V., Cheruiyot, S. K., Mutisya,
D., Kennedy, S. D., Egli, M., Kelley, M. L., Smith, Anja van B., and Rozners, E. A
Single Amide Linkage in the Passenger Strand Suppresses Its Activity and Enhances
Guide Strand Targeting of siRNAs. ACS Chem. Biol.2018, 13, 533-536.
Congratulations to Dan Ciulla (Callahan group) whose recent paper was featured on
the cover of the Journal of the American Chemical Society and featured in the journal's
Spotlight section. The paper describes a new approach to control the activity of a
cancer-related protein through the combined power of site-directed mutagenesis and
mechanism-guided chemical synthesis.
Citation: Ciulla, D.A,; Jorgensen, M.T.; Giner, J.L.; Callahan, B.P. Chemical Bypass
of General Base Catalysis in Hedgehog Protein Cholesterolysis Using a Hyper-Nucleophilic
Substrate. J Am Chem Soc.2018,140(3), 916-918.
The paper describes the identification of energetic contributions to the substrate
translocation by glutamate transporters and highlights the critical contribution of
charge compensation to transport, adding to results from previous molecular dynamics
simulations for improved understanding of the glutamate translocation process. This
work was funded by the NSF.
Citation: Wang J.; Albers†, T.; Grewer*, C. Energy Landscape of the Substrate Translocation
Equilibrium of Plasma-Membrane Glutamate Transporters. J. Phys. Chem. B,2018,122(1), 28–39
An article by Arvind Kumar, Shih-Sheng Sun and Alistair J. Lees published in Photophysics of Organometallics has been ranked 221 out of 64157 articles (published between 2010 to 2014) by Web
Citation: Kumar A.; Sun S.S.; Lees A.J. Photophysics and Photochemistry of Organometallic
Rhenium Diimine Complexes. In Photophysics of Organometallics, Lees A., Eds.; Topics in Organometallic Chemistry, Springer, Berlin, Heidelberg,
2009; vol 29.
Dr. Sozanne Solmaz, Assistant Professor, has published a paper in the Journal Cell
Cycle together with her students Kyle Loftus, Heying Cui, Amanda Ceravolo and Dylan
Perreiras, as well as collaborators David King and Elias Coutavas from UC Berkeley
and the Rockefeller University. The paper provides new insights how the transport
of the nucleus within the cell is initiated in G2 phase. Transport of the nucleus
is important for a fundamental process in brain development and faithful chromosome
segregation. Defects in these transport processes cause cancer and microcephaly, a
devastating brain developmental disease in infants. Results will help devise therapies
for these devastating diseases.
Citation: Loftus, K.M.; Cui, H.; Coutavas, E.; King, D.S.; Ceravolo, A.; Pereiras,
D.; Solmaz, S.R. Mechanism for G2 phase-specific nuclear export of the kinetochore
protein CENP-F. Cell Cycle, 2017,16, 1414-1429.
A recent paper in Nucleic Acids Research “Amide linkages mimic phosphates in RNA interactions
with proteins and are well tolerated in the guide strand of short interfering RNAs”
showcases results obtained by former graduate students Daniel Mutisya and Samwel Cheruiyot
in collaboration with several academic and industrial research groups
Citation: Mutisya, D.; Hardcastle, D.; Cheruiyot, S.; Pallan, P.; Kennedy, S.; Egli,
M.; Kelley, M.L.; van Brabant Smith, A.; Rozners, E. Amide linkages mimic phosphates
in RNA interactions with proteins and are well tolerated in the guide strand of short
interfering RNAs. Nucleic Acids Research,2017, 14, 8142-8155.
A recent paper in RNA journal "Sequence-selective recognition of double-stranded RNA
and enhanced cellular uptake of cationic nucleobase and backbone-modified peptide
nucleic acids” showcases results obtained by graduate student Dziyana Hnedzko and
undergraduate research assistant Yannis Karamitas in collaboration with Professor
Dennis McGee at the Biology Department.
Citation: Hnedzko, D.; McGee, D.W.; Karamitas, Y.A.; Rozners, E. Sequence-selective
recognition of double-stranded RNA and enhanced cellular uptake of cationic nucleobase
and backbone-modified peptide nucleic acids. RNA, 2017,23:, 58-69 .