Crystal and solution structures of the B-DNA dodecamer d(CGCAAATTTGCG) probed by Raman spectroscopy: heterogeneity in the crystal structure does not persist in the solution structure

Biochemistry ◽  
1988 ◽  
Vol 27 (3) ◽  
pp. 931-938 ◽  
Author(s):  
J. M. Benevides ◽  
A. H. J. Wang ◽  
G. A. Van der Marel ◽  
J. H. Van Boom ◽  
G. J. Thomas
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Solution Structure ◽  
Solution Structures ◽  
Dna Dodecamer

Crystal and solution structures of a novel antimicrobial peptide from Chrysomya megacephala

2021 ◽  
Vol 77 (7) ◽  
Author(s):  
Chengliang Xiao ◽  
Zaiyu Xiao ◽  
Cuifang Hu ◽  
Jie Lu ◽  
Liwei Cui ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Ab Initio ◽  
Solution Structure ◽  
Mitochondrial Atpase ◽  
Microbial Infection ◽  
Atpase Inhibitor ◽  
Apparent Contradiction ◽  
Chrysomya Megacephala ◽  
Solution Structures ◽  
Wide Range

Antimicrobial peptides (AMPs) are small amphipathic peptides that exhibit bactericidal activity against a wide range of pathogenic microorganisms and are considered to be potential substitutes for antibiotics effective against microbial infection. PSK, an 84-amino-acid AMP recently isolated from Chrysomya megacephala larvae, probably belongs to the mitochondrial ATPase inhibitor family according to its sequence. No member of this family from an insect has been structurally characterized to date. In this study, the crystal structure of full-length PSK determined by molecular replacement using an ab initio modeled ensemble as a search model and a solution structure obtained from small-angle X-ray scattering (SAXS) measurements are reported. The crystal structure reveals a distinct fold compared with those of homologous peptides, in that PSK comprises two antiparallel α-helices rather than a single long helix, which is in good agreement with the SAXS-based ab initio model. However, the peptide exists as a monomer in solution, even though a stable dimer was observed in the crystal structure. This apparent contradiction may reflect different oligomerization states that may be implicated in its bioactivity. The data presented here have established a solid basis for further mechanistic studies of this novel insect AMP.

scholarly journals Study of anisotropic thermal conductivity in textured thermoelectric alloys by Raman spectroscopy

RSC Advances ◽  
2021 ◽  
Vol 11 (39) ◽  
pp. 24456-24465
Author(s):  
Rapaka S. C. Bose ◽  
K. Ramesh
Keyword(s):  
Crystal Structure ◽  
Thermal Conductivity ◽  
Raman Spectroscopy ◽  
Transport Properties ◽  
Thermal Transport ◽  
Layered Crystal ◽  
Layered Crystal Structure ◽  
Thermal Transport Properties ◽  
Anisotropic Thermal Conductivity ◽  
P Type

Polycrystalline p-type Sb1.5Bi0.5Te3 (SBT) and n-type Bi2Te2.7Se0.3 (BTS) compounds possessing layered crystal structure show anisotropic electronic and thermal transport properties.

Crystallization of Molybdenum Disulfide Films Deposited by Pulsed Laser Ablation

1990 ◽  
Vol 201 ◽  
Author(s):  
J. S. Zabinski ◽  
M. S. Donley ◽  
P. J. John ◽  
V. J. Dyhouse ◽  
A. J. Safriet ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Emerging Technology ◽  
Substrate Material ◽  
Post Deposition Annealing ◽  
Film Properties ◽  
Deposition Parameters ◽  
Post Deposition

AbstractPulsed laser ablation (PLA) is an emerging technology that provides a mechanism to deposit lubricious films and to tailor film properties by the appropriate choice of substrate materials, deposition parameters and post deposition treatments. The properties of MoS2 films deposited by PLA are evaluated as a function of: (1) substrate material, (2) duration of post deposition annealing treatments using 248 nm laser radiation and (3) substrate temperature during deposition. The chemistry and crystal structure of the different films are determined using small angle X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and Rutherford backscattering spectroscopy (RBS). The tribological properties of the films are then evaluated as a function of their chemistry and crystal structure.

scholarly journals Solution structures of long-acting insulin analogues and their complexes with albumin

2019 ◽  
Vol 75 (3) ◽  
pp. 272-282 ◽  
Author(s):  
Line A. Ryberg ◽  
Pernille Sønderby ◽  
Fabian Barrientos ◽  
Jens T. Bukrinski ◽  
Günther H. J. Peters ◽  
...  
Keyword(s):  
Solution Structure ◽  
Insulin Analogues ◽  
Size Exclusion ◽  
Life Extension ◽  
Once Daily ◽  
Solution Structures ◽  
X Ray Scattering ◽  
Exclusion Chromatography ◽  
Self Association ◽  
Long Acting

The lipidation of peptide drugs is one strategy to obtain extended half-lives, enabling once-daily or even less frequent injections for patients. The half-life extension results from a combination of self-association and association with human serum albumin (albumin). The self-association and association with albumin of two insulin analogues, insulin detemir and insulin degludec, were investigated by small-angle X-ray scattering (SAXS) and dynamic light scattering (DLS) in phenolic buffers. Detemir shows concentration-dependent self-association, with an equilibrium between hexamer, dihexamer, trihexamer and larger species, while degludec appears as a dihexamer independent of concentration. The solution structure of the detemir trihexamer has a bent shape. The stoichiometry of the association with albumin was studied using DLS. For albumin–detemir the molar stoichiometry was determined to be 1:6 (albumin:detemir ratio) and for albumin–degludec it was between 1:6 and 1:12 (albumin:degludec ratio). Batch SAXS measurements of a 1:6 albumin:detemir concentration series revealed a concentration dependence of complex formation. The data allowed the modelling of a complex between albumin and a detemir hexamer and a complex consisting of two albumins binding to opposite ends of a detemir dihexamer. Measurements of size-exclusion chromatography coupled to SAXS revealed a complex between a degludec dihexamer and albumin. Based on the results, equilibria for the albumin–detemir and albumin–degludec mixtures are proposed.

scholarly journals The preparation and characterization of SeCl3SbF6, improved syntheses of MCl3(As/Sb)F6 (M = S, Se), and the X-ray crystal structure determination of SeCl3AsF6 and a new phase of SBr3SbF6

1996 ◽  
Vol 74 (9) ◽  
pp. 1671-1681 ◽  
Author(s):  
Jack Passmore ◽  
Paul D. Boyle ◽  
Gabriele Schatte ◽  
Todd Way ◽  
T. Stanley Cameron
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Crystal Structures ◽  
Monoclinic Space Group ◽  
X Ray ◽  
Ft Raman Spectroscopy ◽  
New Phase ◽  
Ft Raman

Alternative and, in some cases, improved syntheses of the salts MX3(As/Sb)F6 (M = S, Se) and SCl3(SbCl6/AlCl4) are described. In addition, the synthesis of SeCl3SbF6 is reported. The compounds were characterized by FT–Raman spectroscopy and the X-ray crystal structures of SeCl3AsF6 (also 77Se NMR) and a new phase of SBr3SbF6 were determined. Crystals of SeCl3AsF6 and SBr3SbF6 are monoclinic, space group P21/c with [values for SBr3SbF6 in brackets] a = 7.678(1) [8.137(1)] Å, b = 9.380(3) [9.583(2)] Å, c = 11.920(3) [12.447(2)] Å, β = 98.19(2)° [97.36(1)]°, V = 849.72(3) [962.6(3)] Å3,z = 4, Dx = 2.925 [3.502] Mg m−3, R = 0.0525 [0.055], and Rw = 0.0554 [0.060] for 1151 [1472] observed reflections. Key words: MX3+ salts, FT–Raman spectroscopy, X-ray crystal structures of SeCl3AsF6, SBr3SbF6, and preparation of SeCl3SbF6.

A synergic approach of X-ray powder diffraction and Raman spectroscopy for crystal structure determination of 2,3-thienoimide capped oligothiophenes

2018 ◽  
Vol 20 (5) ◽  
pp. 3630-3636 ◽  
Author(s):  
C. Cappuccino ◽  
P. P. Mazzeo ◽  
T. Salzillo ◽  
E. Venuti ◽  
A. Giunchi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Powder Diffraction ◽  
Structure Determination ◽  
Molecular Conformation ◽  
Rapid Identification ◽  
Crystal Structure Determination ◽  
X Ray

This work presents a Raman based approach for the rapid identification of the molecular conformation in a series of new 2,3-thienoimide capped quaterthiophenes.

scholarly journals Crystal structure of a B-DNA dodecamer containing inosine, d(CGCIAATTCGCG), at 2.4 Å resolution and its comparison with other B-DNA dodecamers

1992 ◽  
Vol 20 (20) ◽  
pp. 5457-5464 ◽  
Author(s):  
Jian-Cheng Xuan ◽  
Irene T. Weber
Keyword(s):  
Crystal Structure ◽  
Dna Dodecamer

Synthesis, single-crystal structure determination and Raman spectrum of Cu[C(CN)3]2·2 NH3

2015 ◽  
Vol 70 (3) ◽  
pp. 177-181
Author(s):  
Olaf Reckeweg ◽  
Armin Schulz ◽  
Francis J. DiSalvo
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Raman Spectrum ◽  
Single Crystals ◽  
Structure Determination ◽  
Aqueous Ammonia ◽  
Ambient Conditions ◽  
Light Blue ◽  
Cell Parameters ◽  
First Time

AbstractTransparent, light blue crystals of Cu[C(CN)3]2·2 NH3 were obtained by dissolving Cu[C(CN)3]2 in aqueous ammonia and subsequent evaporation of the solvent under ambient conditions. Cu[C(CN)3]2·2 NH3 crystallizes in the space group C2/c (no. 15, Z = 4) with the cell parameters a = 1291.9(3), b = 753.18(15) and c = 1200.8(2) pm, and β = 92.68(3)°. The nature of the tricyanomethanide anion and the ammonia molecules were verified by Raman spectroscopy. Single crystals of Ag[C(CN)3] and Cu[C(CN)3]2 were synthesized, the known structures were confirmed and their Raman spectra were recorded for the first time for comparison.

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