PMID- 17567703 OWN - NLM STAT- MEDLINE DCOM- 20070928 LR - 20181113 IS - 0022-538X (Print) IS - 1098-5514 (Electronic) IS - 0022-538X (Linking) VI - 81 IP - 17 DP - 2007 Sep TI - Porcine arterivirus attachment to the macrophage-specific receptor sialoadhesin is dependent on the sialic acid-binding activity of the N-terminal immunoglobulin domain of sialoadhesin. PG - 9546-50 AB - The sialic acid-binding lectin sialoadhesin (Sn) is a macrophage-restricted receptor for porcine reproductive and respiratory syndrome virus (PRRSV). To investigate the importance of pSn sialic acid-binding activity for PRRSV infection, an R(116)-to-E mutation was introduced in the predicted sialic acid-binding domain of pSn, resulting in a mutant, pSn(RE), that could not bind sialic acids. PSn, but not pSn(RE), allowed PRRSV binding and internalization. These data show that the sialic acid-binding activity of pSn is essential for PRRSV attachment to pSn and thus identifies the variable, N-terminal domain of Sn as a PRRSV binding domain. FAU - Delputte, Peter L AU - Delputte PL AD - Laboratory of Virology, Department Virology, Parasitology, and Immunology, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium. peter.delputte@UGent.be FAU - Van Breedam, Wander AU - Van Breedam W FAU - Delrue, Iris AU - Delrue I FAU - Oetke, Cornelia AU - Oetke C FAU - Crocker, Paul R AU - Crocker PR FAU - Nauwynck, Hans J AU - Nauwynck HJ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20070613 PL - United States TA - J Virol JT - Journal of virology JID - 0113724 RN - 0 (Membrane Glycoproteins) RN - 0 (Receptors, Immunologic) RN - 0 (Receptors, Virus) RN - 0 (Sialic Acid Binding Ig-like Lectin 1) RN - GZP2782OP0 (N-Acetylneuraminic Acid) SB - IM MH - Amino Acid Substitution/genetics MH - Animals MH - Binding Sites/genetics MH - CHO Cells MH - Cricetinae MH - Cricetulus MH - Macrophages/*virology MH - Membrane Glycoproteins/chemistry/genetics/*metabolism MH - Mutagenesis, Site-Directed MH - Mutation, Missense MH - N-Acetylneuraminic Acid/*metabolism MH - Porcine respiratory and reproductive syndrome virus/*physiology MH - Protein Binding MH - Protein Structure, Tertiary MH - Receptors, Immunologic/chemistry/genetics/*metabolism MH - Receptors, Virus/genetics/*metabolism MH - Sialic Acid Binding Ig-like Lectin 1 MH - *Virus Attachment MH - Virus Internalization PMC - PMC1951444 EDAT- 2007/06/15 09:00 MHDA- 2007/09/29 09:00 PMCR- 2008/01/01 CRDT- 2007/06/15 09:00 PHST- 2007/06/15 09:00 [pubmed] PHST- 2007/09/29 09:00 [medline] PHST- 2007/06/15 09:00 [entrez] PHST- 2008/01/01 00:00 [pmc-release] AID - JVI.00569-07 [pii] AID - 0569-07 [pii] AID - 10.1128/JVI.00569-07 [doi] PST - ppublish SO - J Virol. 2007 Sep;81(17):9546-50. doi: 10.1128/JVI.00569-07. Epub 2007 Jun 13.