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Moblie applications

Eivind A B Undheim, Mehdi Mobli, Glenn F King
Three-dimensional (3D) structures have been used to explore the evolution of proteins for decades, yet they have rarely been utilized to study the molecular evolution of peptides. Here, we highlight areas in which 3D structures can be particularly useful for studying the molecular evolution of peptide toxins. Although we focus our discussion on animal toxins, including one of the most widespread disulfide-rich peptide folds known, the inhibitor cystine knot, our conclusions should be widely applicable to studies of the evolution of disulfide-constrained peptides...
June 2016: BioEssays: News and Reviews in Molecular, Cellular and Developmental Biology
Mehdi Mobli
The application of NMR spectroscopy to study the structure, dynamics and function of macromolecules requires the acquisition of several multidimensional spectra. The one-dimensional NMR time-response from the spectrometer is extended to additional dimensions by introducing incremented delays in the experiment that cause oscillation of the signal along "indirect" dimensions. For a given dimension the delay is incremented at twice the rate of the maximum frequency (Nyquist rate). To achieve high-resolution requires acquisition of long data records sampled at the Nyquist rate...
July 2015: Journal of Magnetic Resonance
Junhong Gui, Boyi Liu, Guan Cao, Andrew M Lipchik, Minervo Perez, Zoltan Dekan, Mehdi Mobli, Norelle L Daly, Paul F Alewood, Laurie L Parker, Glenn F King, Yufeng Zhou, Sven-Eric Jordt, Michael N Nitabach
BACKGROUND: The venoms of predators have been an excellent source of diverse highly specific peptides targeting ion channels. Here we describe the first known peptide antagonist of the nociceptor ion channel transient receptor potential ankyrin 1 (TRPA1). RESULTS: We constructed a recombinant cDNA library encoding ∼100 diverse GPI-anchored peptide toxins (t-toxins) derived from spider venoms and screened this library by coexpression in Xenopus oocytes with TRPA1...
March 3, 2014: Current Biology: CB
Jeffrey C Hoch, Mark W Maciejewski, Mehdi Mobli, Adam D Schuyler, Alan S Stern
NMR spectroscopy is one of the most powerful and versatile analytic tools available to chemists. The discrete Fourier transform (DFT) played a seminal role in the development of modern NMR, including the multidimensional methods that are essential for characterizing complex biomolecules. However, it suffers from well-known limitations: chiefly the difficulty in obtaining high-resolution spectral estimates from short data records. Because the time required to perform an experiment is proportional to the number of data samples, this problem imposes a sampling burden for multidimensional NMR experiments...
February 18, 2014: Accounts of Chemical Research
Rajesh Ghai, Mehdi Mobli, Brett M Collins
Endosomal recycling pathways regulate cellular homeostasis via the transport of internalized material back to the plasma membrane. Phox homology (PX) and band 4.1/ezrin/radixin/moesin (FERM) domain-containing proteins are a recently identified subfamily of PX proteins that are critical for the recycling of numerous transmembrane cargo molecules. The PX-FERM subfamily includes three endosome-associated proteins called sorting nexin (SNX) 17, SNX27, and SNX31. These are modular peripheral membrane proteins that act as central scaffolds mediating protein-lipid interactions, cargo binding, and regulatory protein recruitment...
2014: Methods in Enzymology
Jonas E Jensen, Mehdi Mobli, Andreas Brust, Paul F Alewood, Glenn F King, Lachlan D Rash
APETx2 is a peptide isolated from the sea anemone Anthopleura elegantissima. It is the most potent and selective inhibitor of acid-sensing ion channel 3 (ASIC3) and it is currently in preclinical studies as a novel analgesic for the treatment of chronic inflammatory pain. As a peptide it faces many challenges in the drug development process, including the potential lack of stability often associated with therapeutic peptides. In this study we determined the susceptibility of wild-type APETx2 to trypsin and pepsin and tested the applicability of backbone cyclisation as a strategy to improve its resistance to enzymatic degradation...
July 2012: Marine Drugs
Mehdi Mobli, Mark W Maciejewski, Michael R Gryk, Jeffrey C Hoch
Developments in superconducting magnets, cryogenic probes, isotope labeling strategies, and sophisticated pulse sequences together have enabled the application, in principle, of high-resolution NMR spectroscopy to biomolecular systems approaching 1 megadalton. In practice, however, conventional approaches to NMR that utilize the fast Fourier transform, which require data collected at uniform time intervals, result in prohibitively lengthy data collection times in order to achieve the full resolution afforded by high field magnets...
October 2007: Journal of Biomolecular NMR
R Codina, R F Lockey, R Diwadkar, L L Mobly, S Godfrey
BACKGROUND: The effectiveness of acaricides in homes is controversial. OBJECTIVE: To determine whether disodium octaborate tetrahydrate (DOT) combined with vacuuming lowers dust mite numbers and their allergens in carpets and sofas. METHODS: A 6-month study was carried out with 93 homes, which were randomized into three groups: (i). active, received DOT; (ii). placebo, received water; and (iii). control, received no application. Active and placebo homes were vacuumed weekly...
April 2003: Allergy
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