Atomic Resolution (0·83 Å) Crystal Structure of the Hydrophobic Protein Crambin at 130 K

Chenoweth and co-workers provide an atomic resolution crystal structure and computational analysis illustrating that aza-proline mimics l-proline stereochemistry in collagen.

Download Full-text

Atomic resolution crystal structure of squid ganglion DFPase

Acta Crystallographica Section D Biological Crystallography ◽

10.1107/s0907444902012714 ◽

2002 ◽

Vol 58 (10) ◽

pp. 1757-1759 ◽

Cited By ~ 6

Author(s):

Juergen Koepke ◽

Eileen I. Scharff ◽

Christian Lücke ◽

Heinz Rüterjans ◽

Günter Fritzsch

Keyword(s):

Crystal Structure ◽

Atomic Resolution

Download Full-text

Direct observation of incommensurate structure in Mo3Si

Acta Crystallographica Section A Foundations and Advances ◽

10.1107/s2053273316012286 ◽

2016 ◽

Vol 72 (6) ◽

pp. 660-666 ◽

Cited By ~ 2

Author(s):

Ahmet Gulec ◽

Xiaoxiang Yu ◽

Matthew Taylor ◽

John H. Perepezko ◽

Laurence Marks

Keyword(s):

Crystal Structure ◽

Density Functional Theory ◽

Atom Probe Tomography ◽

Density Functional ◽

Density Functional Theory Calculations ◽

Atom Probe ◽

Atomic Resolution ◽

Contrast Imaging ◽

Functional Theory ◽

Incommensurate Structure

Z-contrast imaging, electron diffraction, atom-probe tomography (APT) and density functional theory calculations were used to study the crystal structure of the Mo3Si phase which was previously reported to have an A15 crystal structure. The results showed that Mo3Si has an incommensurate crystal structure with a non-cubic unit cell. The small off-stoichiometry in composition of the sample which was revealed by APT and atomic resolutionZ-contrast imaging suggested that site substitution caused the development of split atomic positions, disorder and vacancies.

Download Full-text

Atomic Resolution Investigations of Phase Transformation from TaN to CrTaN in a Steel Matrix

Materials Science Forum ◽

10.4028/www.scientific.net/msf.706-709.823 ◽

2012 ◽

Vol 706-709 ◽

pp. 823-828

Author(s):

Hilmar Kjartansson Danielsen ◽

John Hald

Keyword(s):

Crystal Structure ◽

Creep Strength ◽

Power Plants ◽

Atomic Resolution ◽

Double Layers ◽

Steel Matrix ◽

Phase Precipitation ◽

Direct Transformation ◽

Term Creep

In development of 12%Cr high temperature steels used for fossil fired power plants, the precipitation of large Z-phase particles, CrMN, has been identified as a major problem since they replace small and finely distributed MN particles. This causes a premature breakdown in the long-term creep strength of the steel. The Cr content promotes Z-phase precipitation, making MN strengthening of these materials unfeasible, since 12%Cr is necessary for oxidation resistance. The authors have suggested an acceleration of Z-phase precipitation to obtain a fine and stable distribution of CrMN instead of MN, thus preserving long-term creep strength. This can be done by alloying with Ta instead of Nb and V. Recent investigations have indicated a direct transformation of MN into CrMN to take place, not the traditional nucleation/dissolution process. In this paper atomic resolution microscopy shows how Cr atoms diffuse from the steel matrix into TaN precipitates and physically transform them into CrTaN. The crystal structure of the precipitates changes from that of a typical MN NaCl type crystal structure to a Z-phase crystal structure with alternating double layers of Cr and TaN. Since there is a large contrast between heavy Ta atoms and light Cr atoms, the ordering of the Cr layers inside the TaN particles can clearly be observed.

Download Full-text

Crystal Structure of Hydrophobic Protein from Soybean; a Member of a New Cysteine-rich Family

Journal of Molecular Biology ◽

10.1006/jmbi.1993.1334 ◽

1993 ◽

Vol 231 (3) ◽

pp. 877-887 ◽

Cited By ~ 59

Author(s):

Franck Baud ◽

Eva Pebay-Peyroula ◽

Claudine Cohen-Addad ◽

Shoji Odani ◽

Mogens S. Lehmann

Keyword(s):

Crystal Structure ◽

Hydrophobic Protein ◽

Rich Family

Download Full-text

2L1412 Crystal structure of oxygen evolving Photosystem II complex at an atomic resolution(Photobiology: Photosynthesis,The 48th Annual Meeting of the Biophysical Society of Japan)

Seibutsu Butsuri ◽

10.2142/biophys.51.s95_2 ◽

2011 ◽

Vol 51 (supplement) ◽

pp. S95

Author(s):

Yasufumi Umena ◽

Keisuke Kawakami ◽

Nobuo Kamiya ◽

Jian-Ren Shen

Keyword(s):

Crystal Structure ◽

Photosystem Ii ◽

Annual Meeting ◽

Atomic Resolution ◽

Biophysical Society ◽

Oxygen Evolving

Download Full-text

Water structure of a hydrophobic protein at atomic resolution: Pentagon rings of water molecules in crystals of crambin

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.81.19.6014 ◽

1984 ◽

Vol 81 (19) ◽

pp. 6014-6018 ◽

Cited By ~ 224

Author(s):

M. M. Teeter

Keyword(s):

Water Structure ◽

Atomic Resolution ◽

Water Molecules ◽

Hydrophobic Protein

Download Full-text

Crystal and Molecular Structure of 7-Diethylamino-[1′,3′,3′-trimethyl-4-((1,3,3-trimethyl-1,3-dihydro-2H-indole-2-ylidene)methyl)-1′,3,3′,4-tetrahydrospiro[chromene-2,2′-indole]]: A Dicondensation Product From the Reaction of 4-Diethylaminosalicylaldehyde with Fischer's Base

Australian Journal of Chemistry ◽

10.1071/ch11499 ◽

2012 ◽

Vol 65 (7) ◽

pp. 779 ◽

Cited By ~ 3

Author(s):

Mohamed Ashraf ◽

Graeme J. Gainsford ◽

Andrew J. Kay

Keyword(s):

Molecular Structure ◽

Crystal Structure ◽

Diffraction Data ◽

Crystal And Molecular Structure ◽

Atomic Resolution ◽

Related Structure ◽

The Novel ◽

Data Comparison ◽

Molecular Features

The novel molecule, 7-diethylamino-[1′,3′,3′-trimethyl-4-((1,3,3-trimethyl-1,3-dihydro-2H-indole-2-ylidene)methyl)-1′,3,3′,4-tetrahydrospiro[chromene-2,2′-indole]], was isolated as the product from the condensation of diethylaminosalicylaldehyde with two equivalents of Fischer’s base and its crystal structure determined, initially using MoKα radiation. The diffraction data at higher theta angles (d < 0.9 Å) was notably weak so a further dataset was collected using CuKα to determine the cause. Although a different crystal batch and larger crystal was used and a better dataset obtained (with significantly improved atomic resolution) the comparison shows that the essential molecular features and weak intermolecular binding are duplicated in the refinement with the latter data. Comparison is made with a closely related structure. Consistent with observations for this related structure it is proposed that the product is formed through the interception of an intermediate carbinol by Fischer’s base.

Download Full-text