Phosphorylation of Aspergillus fumigatus PkaR impacts growth and cell wall integrity through novel mechanisms.

Abstract:

:Protein kinase A (PKA) signaling is essential for growth and virulence of the fungal pathogen Aspergillus fumigatus. Little is known concerning the regulation of this pathway in filamentous fungi. Employing liquid chromatography-tandem mass spectroscopy, we identified novel phosphorylation sites on the regulatory subunit PkaR, distinct from those previously identified in mammals and yeasts, and demonstrated the importance of two phosphorylation clusters for hyphal growth and cell wall-stress response. We also identified key differences in the regulation of PKA subcellular localization in A. fumigatus compared with other species. This is the first analysis of the phosphoregulation of a PKA regulatory subunit in a filamentous fungus and uncovers critical mechanistic differences between PKA regulation in filamentous fungi compared with mammals and yeast species, suggesting divergent targeting opportunities.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Shwab EK,Juvvadi PR,Waitt G,Soderblom EJ,Moseley MA,Nicely NI,Steinbach WJ

doi

10.1002/1873-3468.12886

subject

Has Abstract

pub_date

2017-11-01 00:00:00

pages

3730-3744

issue

22

eissn

0014-5793

issn

1873-3468

journal_volume

591

pub_type

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