scholarly journals Crystal and molecular structure of a histo-blood group antigen involved in cell adhesion: the Lewis x trisaccharide

Glycobiology ◽  
1996 ◽  
Vol 6 (5) ◽  
pp. 537-542 ◽  
Author(s):  
Serge Peréz ◽  
Nadine Mouhous-Riou ◽  
Nikolay E. Nifant'ev ◽  
Yury E. Tsvetkov ◽  
Bernard Bachet ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Cell Adhesion ◽  
Blood Group ◽  
Crystal And Molecular Structure ◽  
Blood Group Antigen ◽  
Lewis X

scholarly journals The Hidden Conformation of Lewis x, a Human Histo-Blood Group Antigen, Is a Determinant for Recognition by Pathogen Lectins

2016 ◽  
Vol 11 (7) ◽  
pp. 2011-2020 ◽  
Author(s):  
Jérémie Topin ◽  
Mickaël Lelimousin ◽  
Julie Arnaud ◽  
Aymeric Audfray ◽  
Serge Pérez ◽  
...  
Keyword(s):  
Blood Group ◽  
Blood Group Antigen ◽  
Lewis X

scholarly journals Occurrence of a novel fucose-containing pentaglycosylceramide with blood-group-B active determinant in Xenopus blastula cells: its possible involvement in cell-cell adhesion

1995 ◽  
Vol 306 (3) ◽  
pp. 821-827 ◽  
Author(s):  
K Nomura ◽  
N Nakajo ◽  
K I P Hidari ◽  
H Nomura ◽  
M Murata ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Cell Adhesion ◽  
Xenopus Laevis ◽  
Blood Group ◽  
Blood Group Antigen ◽  
Gas Chromatography Mass Spectrometry ◽  
Cell Contact ◽  
Chemical Structures ◽  
Group B ◽  
Cell Cell

For understanding of the biological function of glycoconjugates during embryogenesis and morphogenesis, Xenopus laevis is considered a very useful animal model. We have found that blood-group-active molecules characteristically were distributed in the cell-cell contact region of Xenopus blastula cells. The chemical nature of blood-group-active glycoconjugates, including glycosphingolipids, is little known. T.l.c.-immunostaining using anti-blood-group-antigen antibodies showed that many species of blood group-B-active glycosphingolipids existed in the neutral glycosphingolipid fraction extracted from Xenopus laevis eggs. Among the B-active glycosphingolipids detected, two major components with the fastest mobility on a t.l.c. plate, tentatively termed XN-1 and XN-2, were isolated, and their chemical structures were characterized by gas chromatography-mass spectrometry, immunological anlaysis, fast-atom-bombardment mass spectrometry and 1H-n.m.r. spectroscopy. Both XN-1 and XN-2 had an identical pentaoligosaccharide structure, but differed in their ceramide moiety. The chemical structure is: [table: see text]. This is a novel type of pentaglycosylceramide with blood-group B activity, in that it lacks N-acetylhexosamine in its core carbohydrate structure. In this paper, a possible involvement of the blood-group antigen in the cell-adhesion process of Xenopus embryonic cells is discussed.

Crystal and molecular structure of a platinum(II) complex with β-mercaptoethylamine hydrochloride

2018 ◽  
Vol 59 (1) ◽  
pp. 191-195
Author(s):  
A. N. Azizova ◽  
◽  
D. B. Tagiev ◽  
S. N. Osmanova ◽  
Sh. G. Kasumov ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure

The crystal and molecular structure of tris(pentamethylenedithiocarbamate) chromium(III)-chloroform (1 : 2)

1981 ◽  
Vol 46 (1) ◽  
pp. 6-19 ◽  
Author(s):  
Viktor Kettman ◽  
Ján Garaj ◽  
Jaroslav Majer
Keyword(s):  
Molecular Structure ◽  
Structural Analysis ◽  
Crystal And Molecular Structure ◽  
Analysis Method ◽  
Complex Molecules ◽  
Coordination Polyhedra ◽  
X Ray ◽  
Cell Dimensions ◽  
Crustal Density ◽  
Unit Cell Dimensions

The crystal and molecular structure of [Cr(S2CN(CH2)5)3].2 CHCl3 was found by the X-ray structural analysis method. The value R 0.090 was found for 1 131 observed independent reflections. The substance crystallizes in a space group of symmetry P212121 with the following unit cell dimensions: a = 0.8675 (6), b = 1.815(2), c = 2.155(3) nm. The experimentally observed crustal density was 1.48 Mgm-3 and the value calculated for Z = 4 was 1.51 Mgm-3. The CrS6 coordination polyhedron has the shape of a trigonally distorted octahedron, where the D3 symmetry is a approximately retained. The degree of trigonal distortion expressed as the projection of the chelate S-Cr-S angle onto the plane perpendicular to the C3 pseudo axis is Φ = 41.7° (Φ = 60° for an octahedron). The skeleton of the structure formed by the complex molecules contains channels filled with chloroform molecules. The specific type of complex-chloroform interaction consists of the formation of hydrogen bonds of the chloroform protons with the fully occupied pπ-orbitals of the sulphur atoms in the coordination polyhedra. The low stability and crystal decomposition can be explained by loss of chloroform from the channels.

The Crystal and Molecular Structure of sym-fac-(1,4,7-Triazaheptane)-(S)-aspartatocobalt(III) Diperchlorate Dihydrate

1994 ◽  
Vol 59 (5) ◽  
pp. 1052-1058 ◽  
Author(s):  
Jan Ondráček ◽  
Jana Ondráčková ◽  
Jaroslav Maixner ◽  
František Jursík
Keyword(s):  
Molecular Structure ◽  
Aspartic Acid ◽  
Crystal And Molecular Structure ◽  
Heavy Atom ◽  
Membered Ring ◽  
Boat Conformation ◽  
Hydrogen Atoms ◽  
Orthorhombic System ◽  
Anisotropic Temperature ◽  
Heavy Atom Method

The crystal and molecular structure of s-fac-[Co((S)-Asp)(dien)]ClO4 . HClO4 .2 H2O (dien = 1,4,7-triazaheptane) was solved by the heavy atom method. The position parameters of the non-hydrogen atoms and their anisotropic temperature parameters were refined based on 1 726 observed reflections with a final value of R = 0.073. The substance crystallizes in the orthorhombic system in the space group P212121, Z = 4, a = 8.506(1), b = 17.171(2), c = 13.277(1) Å. The structure involves hydrogen bonds between the O2, O4 and HN2 atoms of aspartic acid and the two molecules of water. The five-membered dien chelate rings take the asymmetric envelope conformations. The five-membered ring of (S)-aspartic acid possesses the symmetric envelope conformation whereas the six-membered ring exhibits the skew boat conformation.

Determination of the structure of bis(propyldithiocarbamate)nickel(II)

1990 ◽  
Vol 55 (4) ◽  
pp. 1010-1014 ◽  
Author(s):  
Jiří Kameníček ◽  
Richard Pastorek ◽  
František Březina ◽  
Bohumil Kratochvíl ◽  
Zdeněk Trávníček
Keyword(s):  
Molecular Structure ◽  
Title Compound ◽  
Crystal And Molecular Structure ◽  
Heavy Atom ◽  
Unit Cell ◽  
Monoclinic Space Group ◽  
Planar Configuration ◽  
Compound C ◽  
Heavy Atom Method

The crystal and molecular structure of the title compound (C8H16N2NiS4) was solved by the heavy atom method and the structure was refined anisotropically to a final R factor of R = 0.029 (wR = 0.037) for 715 observed reflections. The crystal is monoclinic, space group P21/c with a = 948.3(2), b = 776.9(2), c = 1 167.4(2) pm, β = 125.14(2)°, Z = 2. The molecule contains two four-membered NiSCS rings of approximately planar configuration with the Ni atom situated at a centre of symmetry. The molecules are arranged in chains along the c-axis of the unit cell.

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