Study on β-sheet packing, stabilized by aromatic interactions in a tri-peptide crystal
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Ravindranath S. Rathore
Abstract
The role of unconventional aromatic interactions in the β-sheet packing, inside the crystal, has been highlighted. Crystal structure of terminally blocked tri-peptide, Z-L-Ala-L-Ala-L-Leu-pNA has been determined. There are four different conformers of tri-peptide inside the unit-cell, in space group P1. All the four independent molecules are described by semi-extended backbone conformations which form an anti-parallel β-sheet. The inter β-sheet packing is predominantly stabilized by C—H…π and π…π interactions. In π…π interactions, the center-to-center distance between aromatic rings varies from 3.8 Å to 4.6 Å while the closest distance of approach ranges from 3.4 Å to 3.8 Å. The associations of aromatic-aromatic rings are described by either face-to-face or inclined arrangements.
© 2004 Oldenbourg Wissenschaftsverlag GmbH
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Articles in the same Issue
- Description of X-ray powder pattern of turbostratically disordered layer structures with a Rietveld compatible approach
- Crystal structures and their enumeration via quotient graphs
- On the crystal parameters of some representatives of the NiAs family containing platinum group metals and gold
- Crystal structure determination of In3(H3O)(H2PO4)6(HPO4)2 · 4H2O from X-ray powder diffraction
- Orthorhombic ε-phases and transitional structures in Al—Pd—(Fe)
- Structure and characterization of methyl (±)-1-(2-aminophenyl)-2-hydroxy-4-(4-methoxybenzoyl)-5-(4-methoxyphenyl)-3-oxo-2,3-dihydro-1H-pyrrole-2-acetate
- Structure analysis and the existence of light-induced long-lived metastable states in Xn[Fe(CN)5NO] with inorganic and organic cations: Xn = Pb, (H3O+CH6N+), (C2N2H7)2 and (C16H36N)2
- Study on β-sheet packing, stabilized by aromatic interactions in a tri-peptide crystal
- High-pressure in-situ crystallization, structure and phase transitions in 1,2-dichloroethane
- Low-temperature crystal structure of RS-thiocamphor
