RAPID INHIBITION OF PROTEIN HISTIDINE PHOSPHORYLATION BY UV-IRRADIATION IN XANTHOMONAS-ORYZAE PV ORYZAE

Citation
Hj. Huang et al., RAPID INHIBITION OF PROTEIN HISTIDINE PHOSPHORYLATION BY UV-IRRADIATION IN XANTHOMONAS-ORYZAE PV ORYZAE, FEMS microbiology letters, 134(2-3), 1995, pp. 189-194
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Microbiology
Journal title
ISSN journal
0378-1097
Volume
134
Issue
2-3
Year of publication
1995
Pages
189 - 194
Database
ISI
SICI code
0378-1097(1995)134:2-3<189:RIOPHP>2.0.ZU;2-8
Abstract
Exposure of Xanthomonas oryzae pv. oryzae tells to 254 nm UV radiation resulted in an alteration of protein phosphorylation. Labelling of th e phosphohistidine-containing proteins with molecular masses of 81 and 32 kDa, named p81 and p32, was rapidly reduced following UV irradiati on in the early exponential cells, but the decrease was not detected i n mid-exponential cells. Mitomycin C, a DNA replication inhibitor, and rifampicin, a drug generally used to inhibit RNA synthesis and DNA re plication, were also found to reduce the histidyl phosphorylation. How ever, this alteration of protein phosphorylation was not hindered by c hloramphenicol treatment. A possible role for these histidyl phosphopr oteins in sensing UV light is proposed.