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-Structure paper
タイトル | The structure of echovirus type 12 bound to a two-domain fragment of its cellular attachment protein decay-accelerating factor (CD 55). |
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ジャーナル・号・ページ | J Biol Chem, Vol. 279, Issue 9, Page 8325-8332, Year 2004 |
掲載日 | 2004年2月27日 |
著者 | David Bhella / Ian G Goodfellow / Pietro Roversi / David Pettigrew / Yasmin Chaudhry / David J Evans / Susan M Lea / |
PubMed 要旨 | Echovirus type 12 (EV12), an Enterovirus of the Picornaviridae family, uses the complement regulator decay-accelerating factor (DAF, CD55) as a cellular receptor. We have calculated a three- ...Echovirus type 12 (EV12), an Enterovirus of the Picornaviridae family, uses the complement regulator decay-accelerating factor (DAF, CD55) as a cellular receptor. We have calculated a three-dimensional reconstruction of EV12 bound to a fragment of DAF consisting of short consensus repeat domains 3 and 4 from cryo-negative stain electron microscopy data (EMD code 1057). This shows that, as for an earlier reconstruction of the related echovirus type 7 bound to DAF, attachment is not within the viral canyon but occurs close to the 2-fold symmetry axes. Despite this general similarity our reconstruction reveals a receptor interaction that is quite different from that observed for EV7. Fitting of the crystallographic co-ordinates for DAF(34) and EV11 into the reconstruction shows a close agreement between the crystal structure of the receptor fragment and the density for the virus-bound receptor, allowing unambiguous positioning of the receptor with respect to the virion (PDB code 1UPN). Our finding that the mode of virus-receptor interaction in EV12 is distinct from that seen for EV7 raises interesting questions regarding the evolution and biological significance of the DAF binding phenotype in these viruses. |
リンク | J Biol Chem / PubMed:14634014 |
手法 | EM (単粒子) |
解像度 | 16.0 - 18.0 Å |
構造データ | EMDB-1057: The structure of echovirus type 12 bound to a two-domain fragment of its cellular attachment protein decay-accelerating factor (CD 55). EMDB-1058: The structure of echovirus type 12 bound to a two-domain fragment of its cellular attachment protein decay-accelerating factor (CD 55). |
由来 |
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キーワード | VIRUS/RECEPTOR / COMPLEX (VIRUS COAT-IMMUNE PROTEIN) / ECHOVIRUS / PICORNAVIRUS / CD55 / DAF / VIRUS-RECEPTOR COMPLEX / ICOSAHEDRAL VIRUS |