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Antimicrobial peptides from animals, plants and fungi organised by their secondary structure content. Circle size indicates overall molecular weight of each peptide. Antimicrobial peptides are a unique and diverse group of molecules, which are divided into subgroups on the basis of their amino acid composition and structure. [3]
Other invertebrates known to produce defensins from this protein superfamily include molluscs, annelids and cnidaria. [24] Plant defensins were discovered in 1990 and have subsequently been found in most plant tissues with antimicrobial activities, with both antifungal and antibacterial examples. [25]
Plant defensins (formerly gamma-thionins) are a family of primitive, highly stable, cysteine-rich defensins found in plants that function to defend them against pathogens and parasites. [1] Defensins are integral components of the innate immune system and belong to the ancient superfamily of antimicrobial peptides (AMPs).
Antimicrobial peptides called defensins are an evolutionarily conserved component of the innate immune response found in all animals and plants, and represent the main form of invertebrate systemic immunity. [157]
Nonribosomal peptides are also found in higher organisms, such as nudibranchs, but are thought to be made by bacteria inside these organisms. [1] While there exist a wide range of peptides that are not synthesized by ribosomes, the term nonribosomal peptide typically refers to a very specific set of these as discussed in this article.
In addition, some of the products of the coagulation system are directly antimicrobial. For example, beta-lysine, a protein produced by platelets during coagulation, can cause lysis of many Gram-positive bacteria by acting as a cationic detergent. [3] Many acute-phase proteins of inflammation are involved in the coagulation system.
Many pathogenesis-related protein families also coincide with groups of human allergens, even though the allergy may have nothing to do with the defense function of the proteins. [5] Grouping these proteins by their sequence features allows for finding potential allergenic proteins from sequenced plant genomes, a field of study dubbed ...
100289462 n/a Ensembl ENSG00000177257 ENSG00000275444 ENSG00000285433 n/a UniProt O15263 n/a RefSeq (mRNA) NM_001205266 n/a RefSeq (protein) NP_001192195 NP_004933 n/a Location (UCSC) Chr 8: 7.41 – 7.42 Mb n/a PubMed search n/a Wikidata View/Edit Human Beta-defensin 2 (BD-2) also known as skin-antimicrobial peptide 1 (SAP1) is a peptide that in humans is encoded by the DEFB4 (defensin, beta ...