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Isolation of a novel antimicrobal peptide gene (Sp-AMP) homologue from Pinus sylvestris (Scots pine) following infection with the root rot fungus Heterobasidion annosum
Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, Box 7026, Uppsala, Sweden.
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2003 (English)In: FEMS Microbiology Letters, ISSN 0378-1097, E-ISSN 1574-6968, Vol. 228, no 1, 27-31 p.Article in journal (Refereed) Published
Abstract [en]

A new family of antimicrobial peptide homologues termed Sp-Amp has been discovered in Pinus sylvestris (Scots pine). This is the first report of such proteins to be characterized in a conifer species. Sp-AMP1 was identified in a substructured cDNA library of root tissue infected with the root rot fungus Heterobasidion annosum and encodes a mature peptide of 79 amino acid residues. Three additional members of the Sp-AMP family (Sp-AMPs 2–4) encode cysteine-rich proteins of 105 amino acids, each containing an N-terminal region with a probable cleavage signal sequence. Northern analysis confirmed that Sp-AMP expression is elevated in Scots pine roots upon infection with H. annosum. These peptides share 64% amino acid identity with a mature protein from Macadamia integrifolia (MiAMP1), which allowed us to build a homology model for preliminary analysis. Southern analyses further confirmed that several copies of the gene are present in the Scots pine genome. The potential significance of Sp-AMP in the H. annosum–conifer pathosystem is discussed.

Place, publisher, year, edition, pages
2003. Vol. 228, no 1, 27-31 p.
National Category
Biochemistry and Molecular Biology
URN: urn:nbn:se:uu:diva-47430DOI: 10.1016/S0378-1097(03)00697-9OAI: oai:DiVA.org:uu-47430DiVA: diva2:75337
Available from: 2008-10-17 Created: 2008-10-17 Last updated: 2014-01-23Bibliographically approved

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Nahalkova, Jarmila
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