3LVX
Crystal structure of human alpha-defensin 1 (I6A mutant)
Summary for 3LVX
| Entry DOI | 10.2210/pdb3lvx/pdb |
| Related | 3GNY |
| Descriptor | Neutrophil defensin 1, SULFATE ION, GLYCEROL, ... (4 entities in total) |
| Functional Keywords | antimicrobial peptide, human alpha defensin 1, human neutrophil peptide 1, hnp1, antibiotic, antimicrobial, antiviral defense, defensin, disulfide bond, fungicide, phosphoprotein, secreted, antimicrobial protein |
| Cellular location | Secreted: P59665 |
| Total number of polymer chains | 2 |
| Total formula weight | 7104.28 |
| Authors | Pazgier, M.,Lu, W. (deposition date: 2010-02-22, release date: 2010-03-09, Last modification date: 2024-10-30) |
| Primary citation | Wei, G.,Pazgier, M.,de Leeuw, E.,Rajabi, M.,Li, J.,Zou, G.,Jung, G.,Yuan, W.,Lu, W.Y.,Lehrer, R.I.,Lu, W. Trp-26 imparts functional versatility to human alpha-defensin HNP1. J.Biol.Chem., 285:16275-16285, 2010 Cited by PubMed Abstract: We performed a comprehensive alanine scan of human alpha-defensin HNP1 and tested the ability of the resulting analogs to kill Staphylococcus aureus, inhibit anthrax lethal factor, and bind human immunodeficiency virus-1 gp120. By far, the most deleterious mutation for all of these functions was W26A. The activities lost by W26A-HNP1 were restored progressively by replacing W26 with non-coded, straight-chain aliphatic amino acids of increasing chain length. The hydrophobicity of residue 26 also correlated with the ability of the analogs to bind immobilized wild type HNP1 and to undergo further self-association. Thus, the hydrophobicity of residue 26 is not only a key determinant of the direct interactions of HNP1 with target molecules, but it also governs the ability of this peptide to form dimers and more complex quaternary structures at micromolar concentrations. Although all defensin peptides are cationic, their amphipathicity is at least as important as their positive charge in enabling them to participate in innate host defense. PubMed: 20220136DOI: 10.1074/jbc.M110.102749 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.63 Å) |
Structure validation
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