6cs9 | pdb_00006cs9

Crystal structure of human beta-defensin 2 in complex with PIP2

spinqualitylabelsall models 6cs9, resolution 1.85Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6cs9 is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: PIO Gene: DEFB4A, DEFB102, DEFB2, DEFB4, DEFB4B (HUMAN) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Human defensins belong to a subfamily of the cationic antimicrobial peptides and act as a first line of defense against invading microbes. Their often broad-spectrum antimicrobial and antitumor activities make them attractive for therapeutic development; however, their precise molecular mechanism(s) of action remains to be defined. We show that human beta-defensin 2 (HBD-2) permeabilizes Candida albicans cell membranes via a mechanism targeting the plasma membrane lipid phosphatidylinositol 4,5-bisphosphate (PIP2). We determined the structure of HBD-2 bound to PIP2, which revealed two distinct PIP2-binding sites, and showed, using functional assays, that mutations in these sites ablate PIP2-mediated fungal growth inhibition by HBD-2. Our study provides the first insight into lipid-mediated human defensin membrane permeabilization at an atomic level and reveals a unique mode of lipid engagement to permeabilize cell membranes. Human beta-defensin 2 kills Candida albicans through phosphatidylinositol 4,5-bisphosphate-mediated membrane permeabilization.,Jarva M, Phan TK, Lay FT, Caria S, Kvansakul M, Hulett MD Sci Adv. 2018 Jul 25;4(7):eaat0979. doi: 10.1126/sciadv.aat0979. eCollection 2018, Jul. PMID:30050988 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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