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Motoya Kohtani et al.
Journal of the American Chemical Society, 126(4), 1206-1213 (2004-01-30)
Equilibrium constants for the adsorption of the first water molecule on six protonated dipeptides (Gly-Gly+H(+), Gly-Ala+H(+), Ala-Gly+H(+), Ala-Ala+H(+), Pro-Gly+H(+), and Gly-Trp+H(+)) have been measured as a function of temperature, and DeltaH(o) and DeltaS(o) determined. Density functional theory calculations were performed...
Y Wei et al.
Journal of the American Chemical Society, 123(25), 6118-6126 (2001-06-21)
Carbon-13 chemical shift anisotropy (CSA) tensors for various carbon sites of polypeptides, and for carbon sites in alpha-helical and beta-sheet conformations of poly-L-alanine, and polyglycine, are presented. The carbonyl (13)C CSA tensors were determined from one-dimensional CPMAS spectra obtained at...
Molly Moravek et al.
Journal of assisted reproduction and genetics, 29(3), 283-290 (2012-01-17)
To examine potential benefits of dipeptide forms of amino acids for embryo culture by determining ability of dipeptide glycine forms to support embryo development, act as osmolytes, and reduce ammonia production. Frozen thawed 1-cell mouse embryos were cultured in media...
Alessandro Pedretti et al.
Bioorganic & medicinal chemistry, 19(15), 4544-4551 (2011-07-12)
Over the last years, considerable progress has been made for the identification and characterization of drug transporters, and several modeling studies have been undertaken to predict their effects on ADME profiling. Thus, this study was focused on the peptide transporter...
C J Gray et al.
Biomedical peptides, proteins & nucleic acids : structure, synthesis & biological activity, 2(1), 13-18 (1996-01-01)
The methodology for the incorporation of azaamino-acid residues into peptides synthesised by a solid-phase method has been extended to allow azaalanine peptides to be prepared. In this way, Ac-Leu-Ser-Gly-azaAla-Gly-Phe-Ser-Leu-NH2 H-Ala-Ala-Lys-Glu-Ala-Ala-Glu-Ala -Ala-Glu-Lys-Ala-azaAla-Glu-Leu-Ala-Leu-N2H3, and H-Ala-azaAla-Lys-Glu-Ala-Ala-Glu-Ala-Ala-Glu-Lys-Ala-Ala-Glu-Leu-A la-Leu-N2H3 have been prepared. A new analogue...
Víctor Cruz et al.
The journal of physical chemistry. B, 115(16), 4880-4886 (2011-04-08)
An exhaustive umbrella sampling simulation of the alanine dipeptide in solution is reported. The presence of stable Y conformations in solution is assessed by both quantum calculations and experimental data from X-ray and NMR protein-solved structures available in the protein...
C L Welch et al.
The Journal of membrane biology, 54(1), 39-50 (1980-01-01)
Isolated renal brush border microvilli vesicles were employed to study the uptake of radiolabel from L-Ala. [3H]Gly and D-Ala.[3H]Gly as well as to determine the presence of dipeptidase activity. Microvilli vesicles were prepared from porcine kidney cortex by differential centrifugation...
Puneet Ahuja et al.
Journal of the American Chemical Society, 131(22), 7498-7499 (2009-05-16)
We report the first observation of long-lived states (LLS) having lifetimes T(LLS) that exceed the corresponding spin-lattice relaxation times T(1) by more than a factor 6 in a protein. Slow diffusion coefficients characteristic of large biomolecules can be determined by...
Griet Van Zeebroeck et al.
Nature chemical biology, 5(1), 45-52 (2008-12-09)
Transporter-related nutrient sensors, called transceptors, mediate nutrient activation of signaling pathways through the plasma membrane. The mechanism of action of transporting and nontransporting transceptors is unknown. We have screened 319 amino acid analogs to identify compounds that act on Gap1...
C Schiene-Fischer et al.
Journal of the American Chemical Society, 123(26), 6227-6231 (2001-06-28)
Spectral differences between the cis and the trans isomer of a secondary amide peptide bond were used to follow the time course of the cis/trans isomerization of Gly-Gly, Gly-Ala, Ala-Gly, and Ala-Ala dipeptides in the UV/vis region at 220 nm....
Gregory A Barding et al.
Journal of proteome research, 12(2), 898-909 (2012-12-05)
Natural disasters such as drought, extreme temperatures, and flooding can severely impact crop production. Understanding the metabolic response of crops threatened with these disasters provides insights into biological response mechanisms that can influence survival. In this study, a comparative analysis...
Zhanli Wang et al.
European journal of medicinal chemistry, 46(8), 3428-3433 (2011-05-31)
A validated 3D pharmacophore model was generated for a series of ACE inhibitory peptides, which consisted of five features (two hydrophobic functions, two hydrogen bond acceptors, and a negative ionizable function). The built model was able to correctly predict the...
[Interaction of poly-DL-alanylglycine with a phospholipid membrane].
E N Zvonkova et al.
Doklady Akademii nauk SSSR, 259(3), 726-727 (1981-01-01)
Yan Cheng et al.
Se pu = Chinese journal of chromatography, 24(2), 188-191 (2006-07-13)
Peptides are increasingly used as pharmaceutical agents. Many small peptides are the essential compounds in biological systems. Direct chiral separation of dipeptide derivatives using 9-(2-carbazole) ethyl chloroformate (CEOC) as the derivatizing agent by capillary electrophoresis (CE) with beta-cyclodextrin (beta-CD) and...
P R Vasos et al.
Proceedings of the National Academy of Sciences of the United States of America, 106(44), 18469-18473 (2009-10-21)
Major breakthroughs have recently been reported that can help overcome two inherent drawbacks of NMR: the lack of sensitivity and the limited memory of longitudinal magnetization. Dynamic nuclear polarization (DNP) couples nuclear spins to the large reservoir of electrons, thus...
Yousuke Tsuneyoshi et al.
BMC neuroscience, 8, 37-37 (2007-06-01)
Carnosine (beta-alanyl-L-histidine) is a putative neurotransmitter and has a possible role in neuron-glia cell interactions. Previously, we reported that carnosine induced hyperactivity in chicks when intracerebroventricularly (i.c.v.) administered. In the present study, we focused on other beta-alanyl dipeptides to determine...
Annegret Biegel et al.
Journal of medicinal chemistry, 48(13), 4410-4419 (2005-06-25)
The utilization of the membrane transport protein PEPT1 as a drug delivery system is a promising strategy to enhance the oral bioavailability of drugs. Since very little is known about the substrate binding site of PEPT1, computational methods are a...
Trang U Vo et al.
Electrophoresis, 25(9), 1230-1236 (2004-06-03)
Series of dipeptides, including homodipeptides and alanyl dipeptides, were separated using quadruplex (G-quartet) DNA stationary phases in open-tubular capillary electrochromatography (OTCEC). The stationary phases were constructed by covalently attaching the DNA oligonucleotides to the inner capillary surface. Three different G-quartet...
Lee Ayres et al.
Biomacromolecules, 6(2), 825-831 (2005-03-15)
Silks are a widely studied class of naturally occurring structural proteins. Dragline spider silk, in particular, is considered to be nature's high-performance material due to its remarkable combination of strength and toughness. These mechanical properties stem from the protein secondary...
Analysis of vibrational spectra of L-alanylglycine based on density functional theory calculations.
Padmaja L, Ravikumar C, James C, et al.
Spectrochimica Acta Part A: Molecular Spectroscopy, 71, 252-262 (2008)
L Padmaja et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 71(1), 252-262 (2008-02-05)
FT Raman and IR spectra of the crystallized biologically active molecule, L-alanylglycine (L-Ala-Gly) have been recorded and analyzed. The equilibrium geometry, bonding features and harmonic vibrational frequencies of L-Ala-Gly have been investigated with the help of B3LYP density functional theory...
Aurélien Bornet et al.
Journal of magnetic resonance (San Diego, Calif. : 1997), 206(1), 154-156 (2010-07-10)
The transverse relaxation rate R(2) of single quantum coherences, the relaxation rate R(LLC) of long-lived coherences (LLC), and the ratio R(2)/R(LLC) have been studied by experiment, simulation and theory in the two-spin system formed by the Glycine aliphatic protons of...
W W Navarre et al.
The Journal of biological chemistry, 274(22), 15847-15856 (1999-05-21)
Bacteriophage muralytic enzymes degrade the cell wall envelope of staphylococci to release phage particles from the bacterial cytoplasm. Murein hydrolases of staphylococcal phages phi11, 80alpha, 187, Twort, and phiPVL harbor a central domain that displays sequence homology to known N-acetylmuramyl-L-alanyl...
Raman optical activity.
L A Nafie et al.
Methods in enzymology, 226, 470-482 (1993-01-01)
Marie-Pierre Gaigeot
Physical chemistry chemical physics : PCCP, 12(35), 10198-10209 (2010-06-12)
Following our previous work [J. Phys. Chem. B. Lett., 2009, 113, 10059], DFT-based molecular dynamics (DFTMD) simulations of 2-Ala peptide (i.e. Ac-Ala-NHMe dialanine peptide analog with methyl group caps at the extremities) immersed in liquid water at room temperature are...
Gregory A Barding et al.
Journal of proteome research, 11(1), 320-330 (2011-10-25)
Although the genetic mechanism of submergence survival for rice varieties containing the SUB1A gene has been elucidated, the downstream metabolic effects have not yet been evaluated. In this study, the metabolomes of Oryza sativa ssp. japonica cv. M202 and cv....
Masatoshi Watabe et al.
Journal of inorganic biochemistry, 100(10), 1653-1659 (2006-07-22)
We prepared platinum(IV) complexes containing dipeptide and diimine or diamine, the [PtCl(dipeptide-N,N,O)(diimine or diamine)]Cl complex, where -N,N,O means dipeptide coordinated as a tridentate chelate, dipeptide=glycylglycine (NH(2)CH(2)CON(-)CH(2)COO(-), digly, where two protons of dipeptide are detached when the dipeptide coordinates to metal...
M Tafazzoli et al.
Magnetic resonance in chemistry : MRC, 46(4), 370-376 (2008-02-15)
(13)C chemical shieldings and (14)N and (2)H electric field gradient (EFG) tensors of L-alanylglycine (L-alagly) dipeptide were calculated at RHF/6-31 + + G** and B3LYP/6-31 + + G** levels of theory respectively. For these calculations a crystal structure of this...
K Okuyama et al.
Biopolymers, 59(5), 310-319 (2001-08-22)
The molecular and crystal structure of one of the crystalline modifications of Bombyx mori, silk I, was determined by x-ray diffraction method. Cell dimensions are essentially the same as those found in the synthetic model peptide poly(L-Ala-Gly). The (straight phi...
Voislav Blagojevic et al.
Analytical chemistry, 83(9), 3470-3476 (2011-04-21)
The ability to resolve isomeric protonated dipeptides was investigated with the new technique of differential ion mobility mass spectrometry that uses "modifier" molecules to enhance differential mobility. Two pairs of protonated peptides [glycine-alanine (GlyAla) and alanine-glycine (AlaGly), glycine-serine (GlySer) and...
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