1yo4

Solution Structure of the SARS Coronavirus ORF 7a coded X4 protein

spinqualitylabelsall models 1yo4, 10 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1yo4 is a 1 chain structure with sequence from Sars coronavirus. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, OCA, RCSB, PDBsum Function [YX4_CVHSA] Non-structural protein which is dispensable for virus replication in cell culture. Publication Abstract from PubMed The SARS related Coronavirus genome contains a variety of novel accessory genes. One of these, called ORF7a or ORF8, code for a protein, known as 7a, U122 or X4. We set out to determine the three-dimensional structure of the soluble ectodomain of this type-I transmembrane protein by nuclear magnetic resonance spectroscopy. The fold of the protein is the first member of a further variation of the immunoglobulin like beta-sandwich fold. Because X4 does not reveal significant sequence homologies to proteins in the data bases, we carried out a structure based similarity search for proteins with known function. High structural similarity to Dl domains of ICAM-1 and ICAM-2, and common features in amino acid sequence between X4 and ICAM-1, suggest X4 to possess binding activity for the alpha(L) integrin I domain of LFA-1. Further, based on this structure based prediction, potential functions of X4 in virus replication and pathogenesis are discussed. Solution structure of the X4 protein coded by the SARS related coronavirus reveals an immunoglobulin like fold and suggests a binding activity to integrin I domains.,Hanel K, Stangler T, Stoldt M, Willbold D J Biomed Sci. 2006 May;13(3):281-93. Epub 2005 Nov 23. PMID:16328780 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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