2024
GpsB Coordinates StkP Signaling as a PASTA Kinase Adaptor in<i> Streptococcus</i><i> pneumoniae</i> Cell Division
STAUBEROVA, Vaclava; Bohumil KUBESA; Merrin JOSEPH; Mattia BENEDET; Berenice FURLAN et al.Základní údaje
Originální název
GpsB Coordinates StkP Signaling as a PASTA Kinase Adaptor in<i> Streptococcus</i><i> pneumoniae</i> Cell Division
Autoři
STAUBEROVA, Vaclava; Bohumil KUBESA; Merrin JOSEPH; Mattia BENEDET; Berenice FURLAN; Karolina BURIANKOVA; Ales ULRYCH; Rudolf KUPCIK; Tomas VOMASTEK; Orietta MASSIDDA; Ho-Ching T TSUI; Malcolm E WINKLER; Pavel BRANNY a Linda DOUBRAVOVA
Vydání
Journal of Molecular Biology, LONDON, ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2024, 0022-2836
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10608 Biochemistry and molecular biology
Stát vydavatele
Velká Británie a Severní Irsko
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 4.500
Označené pro přenos do RIV
Ano
Kód RIV
RIV/00216224:90242/24:00139177
Organizační jednotka
CIISB III
UT WoS
EID Scopus
Klíčová slova anglicky
cell signalling; Ser/Thr protein kinase; phosphorylation; cell division; protein-protein interaction
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 26. 3. 2025 21:28, Mgr. Eva Dubská
Anotace
V originále
StkP, the Ser/Thr protein kinase of the major human pathogen Streptococcus pneumoniae, , monitors cell wall signals and regulates growth and division in response. In vivo, , StkP interacts with GpsB, a cell division protein required for septal ring formation and closure, that affects StkP-dependent phosphorylation. Here, we report that although StkP has basal intrinsic kinase activity, GpsB promotes efficient autophosphorylation of StkP and phosphorylation of StkP substrates. Phosphoproteomic analyzes showed that GpsB is phosphorylated at several Ser and Thr residues. We confirmed that StkP directly phosphorylates GpsB in vitro and in vivo, , with T79 and T83 being the major phosphorylation sites. In vitro, , phosphoablative GpsB substitutions had a lower potential to stimulate StkP activity, whereas phosphomimetic substitutions were functional in terms of StkP activation. In vivo, , substitutions of GpsB phosphoacceptor residues, either phosphoablative or mimetic, had a negative effect on GpsB function, resulting in reduced StkP-dependent phosphorylation and impaired cell division. The bacterial two-hybrid assay and coimmunoprecipitation of GpsB from cells with differentially active StkP indicated that increased phosphorylation of GpsB resulted in a more efficient interaction of GpsB with StkP. Our data suggest that GpsB acts as an adaptor that directly promotes StkP activity by mediating interactions within the StkP signaling hub, ensuring StkP recruitment into the complex and substrate specificity. We present a model that interaction of StkP with GpsB and its phosphorylation and dephosphorylation dynamically modulate kinase activity during exponential growth and under cell wall stress of S. pneumoniae, , ensuring the proper functioning of the StkP signaling pathway. (c) 2024 The Author(s). Published by Elsevier Ltd.
Návaznosti
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