Chemical genetic approach using β-rubromycin reveals that a RIO kinase-like protein is involved in morphological development in Phytophthora infestans.

Abstract:

:To characterize the molecular mechanisms underlying life-stage transitions in Phytophthora infestans, we initiated a chemical genetics approach by screening for a stage-specific inhibitor of morphological development from microbial culture extracts prepared mostly from actinomycetes from soil in Japan. Of the more than 700 extracts, one consistently inhibited Ph. infestans cyst germination. Purification and identification of the active compound by ESI-MS, 1H-NMR, and 13C-NMR identified β-rubromycin as the inhibitor of cyst germination (IC50 = 19.8 μg/L); β-rubromycin did not inhibit growth on rye media, sporangium formation, zoospore release, cyst formation, or appressorium formation in Ph. infestans. Further analyses revealed that β-rubromycin inhibited the germination of cysts and oospores in Pythium aphanidermatum. A chemical genetic approach revealed that β-rubromycin stimulated the expression of RIO kinase-like gene (PITG_04584) by 60-fold in Ph. infestans. Genetic analyses revealed that PITG_04584, which lacks close non-oomycete relatives, was involved in zoosporogenesis, cyst germination, and appressorium formation in Ph. infestans. These data imply that further functional analyses of PITG_04584 may contribute to new methods to suppress diseases caused by oomycetes.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Tani S,Nishio N,Kai K,Hagiwara D,Ogata Y,Tojo M,Sumitani JI,Judelson HS,Kawaguchi T

doi

10.1038/s41598-020-79326-7

subject

Has Abstract

pub_date

2020-12-18 00:00:00

pages

22326

issue

1

issn

2045-2322

pii

10.1038/s41598-020-79326-7

journal_volume

10

pub_type

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