New antimicrobial potential and structural properties of PAFB: A Cationic, cysteine-rich protein from penicillium chrysogenum Q176

Anna Huber, Dorottya Hajdu, Doris Bratschun-Khan, Z. Gáspári, Mihayl Varbanov, Stéphanie Philippot, Ádám Fizil, András Czajlik, Z. Kele, Christoph Sonderegger, László Galgóczy, A. Bodor, Florentine Marx, G. Batta

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Small, cysteine-rich and cationic proteins with antimicrobial activity are produced by diverse organisms of all kingdoms and represent promising molecules for drug development. The ancestor of all industrial penicillin producing strains, the ascomycete Penicillium chryosgenum Q176, secretes the extensively studied antifungal protein PAF. However, the genome of this strain harbours at least two more genes that code for other small, cysteine-rich and cationic proteins with potential antifungal activity. In this study, we characterized the pafB gene product that shows high similarity to PgAFP from P. chrysogenum R42C. Although abundant and timely regulated pafB gene transcripts were detected, we could not identify PAFB in the culture broth of P. chrysogenum Q176. Therefore, we applied a P. chrysogenum-based expression system to produce sufficient amounts of recombinant PAFB to address unanswered questions concerning the structure and antimicrobial function. Nuclear magnetic resonance (NMR)-based analyses revealed a compact β-folded structure, comprising five β-strands connected by four solvent exposed and flexible loops and an "abcabc" disulphide bond pattern. We identified PAFB as an inhibitor of growth of human pathogenic moulds and yeasts. Furthermore, we document for the first time an anti-viral activity for two members of the small, cysteine-rich and cationic protein group from ascomycetes.

Original languageEnglish
Article number1751
JournalScientific Reports
Volume8
Issue number1
DOIs
Publication statusPublished - Dec 1 2018

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Penicillium chrysogenum
Cysteine
Ascomycota
Proteins
Genes
Growth Inhibitors
Penicillium
Disulfides
Penicillins
Fungi
Magnetic Resonance Spectroscopy
Yeasts
Genome
Pharmaceutical Preparations

ASJC Scopus subject areas

  • General

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New antimicrobial potential and structural properties of PAFB : A Cationic, cysteine-rich protein from penicillium chrysogenum Q176. / Huber, Anna; Hajdu, Dorottya; Bratschun-Khan, Doris; Gáspári, Z.; Varbanov, Mihayl; Philippot, Stéphanie; Fizil, Ádám; Czajlik, András; Kele, Z.; Sonderegger, Christoph; Galgóczy, László; Bodor, A.; Marx, Florentine; Batta, G.

In: Scientific Reports, Vol. 8, No. 1, 1751, 01.12.2018.

Research output: Contribution to journalArticle

Huber, A, Hajdu, D, Bratschun-Khan, D, Gáspári, Z, Varbanov, M, Philippot, S, Fizil, Á, Czajlik, A, Kele, Z, Sonderegger, C, Galgóczy, L, Bodor, A, Marx, F & Batta, G 2018, 'New antimicrobial potential and structural properties of PAFB: A Cationic, cysteine-rich protein from penicillium chrysogenum Q176', Scientific Reports, vol. 8, no. 1, 1751. https://doi.org/10.1038/s41598-018-20002-2
Huber, Anna ; Hajdu, Dorottya ; Bratschun-Khan, Doris ; Gáspári, Z. ; Varbanov, Mihayl ; Philippot, Stéphanie ; Fizil, Ádám ; Czajlik, András ; Kele, Z. ; Sonderegger, Christoph ; Galgóczy, László ; Bodor, A. ; Marx, Florentine ; Batta, G. / New antimicrobial potential and structural properties of PAFB : A Cationic, cysteine-rich protein from penicillium chrysogenum Q176. In: Scientific Reports. 2018 ; Vol. 8, No. 1.
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