1jrf
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(New page: 200px<br /><applet load="1jrf" size="450" color="white" frame="true" align="right" spinBox="true" caption="1jrf" /> '''NMR Solution Structure of the Viral Receptor...)
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Revision as of 16:23, 20 November 2007
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NMR Solution Structure of the Viral Receptor Domain of Tva
Overview
Tva is the cellular receptor for subgroup A avian sarcoma and leukosis, virus (ASLV-A). The viral receptor function of Tva is determined by a, 40-residue, cysteine-rich motif called the LDL-A module. Here we report, the solution structure of the LDL-A module of Tva, determined by nuclear, magnetic resonance (NMR) spectroscopy. Although the carboxyl terminus of, the Tva LDL-A module has a structure similar to those of other reported, LDL-A modules, the amino terminus adopts a different conformation. The, LDL-A module of Tva does not contain the signature antiparallel beta-sheet, observed in other LDL-A modules, and it is more flexible than other, reported LDL-A modules. The LDL-A structure of Tva provides mechanistic, insights into how a simple viral receptor functions in retrovirus entry., The side chains of H38 and W48 of Tva, which have been identified as viral, contact residues by mutational analysis, are solvent exposed, suggesting, that they are directly involved in EnvA binding. However, the side chain, of L34, another potential viral contact residue identified previously, is, buried inside of the module and forms the hydrophobic core with other, residues. Thus L34 likely stabilizes the Tva structure but is not a viral, interaction determinant. In addition, we propose that the flexible, amino-terminal region of Tva plays an important role in determining, specificity in the Tva-EnvA interaction.
About this Structure
1JRF is a Single protein structure of sequence from Coturnix japonica with CA as ligand. Full crystallographic information is available from OCA.
Reference
Solution structure of the viral receptor domain of Tva and its implications in viral entry., Wang QY, Huang W, Dolmer K, Gettins PG, Rong L, J Virol. 2002 Mar;76(6):2848-56. PMID:11861852
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