Context-Specific Target Definition in Influenza A Virus Hemagglutinin – Glycan Receptor Interactions
Identifieur interne : 001122 ( Main/Exploration ); précédent : 001121; suivant : 001123Context-Specific Target Definition in Influenza A Virus Hemagglutinin – Glycan Receptor Interactions
Auteurs : Zachary Shriver ; Rahul Raman ; Karthik Viswanathan ; Ram SasisekharanSource :
- Chemistry & biology [ 1074-5521 ] ; 2009.
Abstract
Protein-glycan interactions are important regulators for a variety of biological processes, ranging from immune recognition to anticoagulation. An important area of active research is directed towards understanding the role of host cell surface glycans as recognition sites for pathogen protein receptors. Recognition of cell surface glycans is a widely employed strategy for a variety of pathogens, including bacteria, parasites, and viruses. We present here a representative example of such an interaction: the binding of influenza A hemagglutinin (HA) to specific sialylated glycans on the cell surface of human upper airway epithelial cells, which initiates the infection cycle. We detail a generalizable strategy to understand the nature of protein-glycan interactions both structurally and biochemically, using HA as a model system. This strategy combines a
Url:
DOI: 10.1016/j.chembiol.2009.08.002
PubMed: 19716471
PubMed Central: 3733240
Affiliations:
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<front><div type="abstract" xml:lang="en"><title>Summary</title>
<p id="P1">Protein-glycan interactions are important regulators for a variety of biological processes, ranging from immune recognition to anticoagulation. An important area of active research is directed towards understanding the role of host cell surface glycans as recognition sites for pathogen protein receptors. Recognition of cell surface glycans is a widely employed strategy for a variety of pathogens, including bacteria, parasites, and viruses. We present here a representative example of such an interaction: the binding of influenza A hemagglutinin (HA) to specific sialylated glycans on the cell surface of human upper airway epithelial cells, which initiates the infection cycle. We detail a generalizable strategy to understand the nature of protein-glycan interactions both structurally and biochemically, using HA as a model system. This strategy combines a <italic>top-down</italic>
approach using available structural information to define important contacts between glycans and HA, with a <italic>bottom-up</italic>
approach using data mining and informatics approaches to identify the common motifs which distinguish glycan binders from non-binders. By probing protein-glycan interactions simultaneously through <italic>top-down</italic>
and <italic>bottom-up</italic>
approaches we can scientifically validate a series of observations. This in turn provides additional confidence and surmounts known challenges in the study of protein-glycan interactions, such as accounting for multivalency, and thus truly defines concepts such as <italic>specificity</italic>
, <italic>affinity,</italic>
and <italic>avidity</italic>
. With the advent of new technologies for glycomics—including glycan arrays, data mining solutions, and robust algorithms to model protein-glycan interactions—we anticipate that such combination approaches will become tractable for a wide variety of protein-glycan interactions.</p>
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<name sortKey="Shriver, Zachary" sort="Shriver, Zachary" uniqKey="Shriver Z" first="Zachary" last="Shriver">Zachary Shriver</name>
<name sortKey="Viswanathan, Karthik" sort="Viswanathan, Karthik" uniqKey="Viswanathan K" first="Karthik" last="Viswanathan">Karthik Viswanathan</name>
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