BcNoxD, a putative ER protein, is a new component of the NADPH oxidase complex in Botrytis cinerea. Issue 6 (19th December 2014)

• Record Type: Journal Article
• Authors: Siegmund, Ulrike; Marschall, Robert; Tudzynski, Paul
• Is Part Of: Molecular microbiology. Volume 95:Issue 6(2015)
• Page Start: 988
• Page End: 1005
• Publication Date: 2014-12-19
• Subjects: Molecular microbiology -- Periodicals; 572.829
• DOI: 10.1111/mmi.12869
• Languages: English
• ISSNs: 0950-382X

Abstract

<abstract abstract-type="main"> <title>Summary</title> <p>NADPH oxidases (Nox) are major enzymatic producer of reactive oxygen species (ROS). In fungi these multi‐enzyme complexes are involved in sexual differentiation and pathogenicity. However, in contrast to mammalian systems, the composition and recruitment of the fungal Nox complexes are unresolved. Here we introduce a new Nox component, the membrane protein NoxD in the grey mold fungus <italic>B</italic><italic>otrytis cinerea</italic>. It has high homology to the ER protein Pro41 from <italic>S</italic><italic>ordaria macrospora</italic>, similar functions to the catalytic Nox subunit BcNoxA in differentiation and pathogenicity, and shows similarities to phagocytic p22phox. BcNoxA and BcNoxD interact with each other. Both proteins are involved in pathogenicity, fusion of conidial anastomosis tubes (CAT) and formation of sclerotia and conidia. These data support our earlier view based on localization studies, for an ER‐related function of the Nox complex. We present the first evidence that some functions of the BcNoxA complex are indeed linked to the ER, while others clearly require export from the ER.</p> </abstract>