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395 Newest Publications in proceedings of the national academy of sciences current issue

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matching the following criteria

Orientation of aromatic residues in amyloid cores: Structural insights into prion fiber diversity [Chemistry]

02-Dec-2014 | Anna Reymer; Kendra K. Frederick; Sandra Rocha; Tamás Beke-Somfai; Catherine C. Kitts; Susan Lindquist; Bengt Nordén, Proceedings of the National Academy of Sciences current issue, 2014

Structural conversion of one given protein sequence into different amyloid states, resulting in distinct phenotypes, is one of the most intriguing phenomena of protein biology. Despite great efforts the structural origin of prion diversity remains elusive, mainly because amyloids are insoluble ...

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Flexible and conductive MXene films and nanocomposites with high capacitance [Chemistry]

25-Nov-2014 | Zheng Ling; Chang E. Ren; Meng-Qiang Zhao; Jian Yang; James M. Giammarco; Jieshan Qiu; Michel W. Barsoum; Yury Gogotsi, Proceedings of the National Academy of Sciences current issue, 2014

MXenes, a new family of 2D materials, combine hydrophilic surfaces with metallic conductivity. Delamination of MXene produces single-layer nanosheets with thickness of about a nanometer and lateral size of the order of micrometers. The high aspect ratio of delaminated MXene renders it promising ...

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Bispecific antibody generated with sortase and click chemistry has broad antiinfluenza virus activity [Immunology and Inflammation]

25-Nov-2014 | Koen Wagner; Mark J. Kwakkenbos; Yvonne B. Claassen; Kelly Maijoor; Martino Böhne; Koenraad F. van der Sluijs; Marti ..., Proceedings of the National Academy of Sciences current issue, 2014

Bispecific antibodies have therapeutic potential by expanding the functions of conventional antibodies. Many different formats of bispecific antibodies have meanwhile been developed. Most are genetic modifications of the antibody backbone to facilitate incorporation of two different variable ...

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Amino acid modified Ni catalyst exhibits reversible H2 oxidation/production over a broad pH range at elevated temperatures [Chemistry]

18-Nov-2014 | Arnab Dutta; Daniel L. DuBois; John A. S. Roberts; Wendy J. Shaw, Proceedings of the National Academy of Sciences current issue, 2014

Hydrogenases interconvert H2 and protons at high rates and with high energy efficiencies, providing inspiration for the development of molecular catalysts. Studies designed to determine how the protein scaffold can influence a catalytically active site have led to the synthesis of amino acid ...

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Self-assembled MmsF proteinosomes control magnetite nanoparticle formation in vitro [Chemistry]

11-Nov-2014 | Andrea E. Rawlings; Jonathan P. Bramble; Robyn Walker; Jennifer Bain; Johanna M. Galloway; Sarah S. Staniland, Proceedings of the National Academy of Sciences current issue, 2014

Magnetotactic bacteria synthesize highly uniform intracellular magnetite nanoparticles through the action of several key biomineralization proteins. These proteins are present in a unique lipid-bound organelle (the magnetosome) that functions as a nanosized reactor in which the particle is ...

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Luminescence color switching of supramolecular assemblies of discrete molecular decanuclear gold(I) sulfido complexes [Chemistry]

11-Nov-2014 | Franky Ka-Wah Hau; Terence Kwok-Ming Lee; Eddie Chung-Chin Cheng; Vonika Ka-Man Au; Vivian Wing-Wah Yam, Proceedings of the National Academy of Sciences current issue, 2014

A series of discrete decanuclear gold(I) μ3-sulfido complexes with alkyl chains of various lengths on the aminodiphosphine ligands, [Au10{Ph2PN(CnH2n+1)PPh2}4(μ3-S)4](ClO4)2, has been synthesized and characterized. These complexes have been shown to form supramolecular nanoaggregate assemblies ...

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Redox chemistry in the phosphorus biogeochemical cycle [Earth, Atmospheric, and Planetary Sciences]

28-Oct-2014 | Matthew A. Pasek; Jacqueline M. Sampson; Zachary Atlas, Proceedings of the National Academy of Sciences current issue, 2014

The element phosphorus (P) controls growth in many ecosystems as the limiting nutrient, where it is broadly considered to reside as pentavalent P in phosphate minerals and organic esters. Exceptions to pentavalent P include phosphine—PH3—a trace atmospheric gas, and phosphite and hypophosphite, P ...

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Loss of conformational entropy in protein folding calculated using realistic ensembles and its implications for NMR-based calculations [Chemistry]

28-Oct-2014 | Michael C. Baxa; Esmael J. Haddadian; John M. Jumper; Karl F. Freed; Tobin R. Sosnick, Proceedings of the National Academy of Sciences current issue, 2014

The loss of conformational entropy is a major contribution in the thermodynamics of protein folding. However, accurate determination of the quantity has proven challenging. We calculate this loss using molecular dynamic simulations of both the native protein and a realistic denatured state ...

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Ultraefficient homogeneous catalyst for the CO2-to-CO electrochemical conversion [Chemistry]

21-Oct-2014 | Cyrille Costentin; Guillaume Passard; Marc Robert; Jean-Michel Savéant, Proceedings of the National Academy of Sciences current issue, 2014

A very efficient electrogenerated Fe0 porphyrin catalyst was obtained by substituting in tetraphenylporphyrin two of the opposite phenyl rings by ortho-, ortho'-phenol groups while the other two are perfluorinated. It proves to be an excellent catalyst of the CO2-to-CO conversion as to ...

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Designer substrate library for quantitative, predictive modeling of reaction performance [Chemistry]

14-Oct-2014 | Elizabeth N. Bess; Amanda J. Bischoff; Matthew S. Sigman, Proceedings of the National Academy of Sciences current issue, 2014

Assessment of reaction substrate scope is often a qualitative endeavor that provides general indications of substrate sensitivity to a measured reaction outcome. Unfortunately, this field standard typically falls short of enabling the quantitative prediction of new substrates’ performance. The ...

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