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Publication Abstract from PubMed

Defensins are innate immune molecules that upon recognition of specific phospholipids can disrupt microbial membranes by forming oligomeric assemblies. Structures of two related plant defensins, NaD1 and NsD7, bound to phosphatidylinositol 4,5-bisphosphate (PIP2 ) and phosphatidic acid (PA), respectively, revealed striking differences in their oligomeric topologies. To understand how NsD7 binds different phospholipids and rationalize the different topologies, we determined the structure of an NsD7-PIP2 complex. This structure reveals fundamental differences in phospholipid binding compared to NsD7-PA, and an oligomeric topology nearly identical to the previously determined NaD1-PIP2 complex, establishing that the PIP2 fibril topology is conserved between NaD1 and NsD7. Our findings highlight the remarkable ability of defensins to bind different types of phospholipids to form oligomeric fibrils with diverse topologies. This article is protected by copyright. All rights reserved.

Structure of the defensin NsD7 in complex with PIP2 reveals that defensin:lipid oligomer topologies are dependent on lipid type.,Jarva M, Lay FT, Hulett MD, Kvansakul M FEBS Lett. 2017 Jul 25. doi: 10.1002/1873-3468.12761. PMID:28741756^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.