Migration of polyphosphate granules in \(\textit {Agrobacterium tumefaciens}\)
- \(\textit {Agrobacterium tumefaciens}\) has two polyphosphate (polyP) kinases, one of which (PPK1\(_AT\)) is responsible for the formation of polyP granules, while the other (PPK2\(_AT\)) is used for replenishing the NTP pools by using polyP as a phosphate donor to phosphorylate nucleoside diphosphates. Fusions of eYFP with PPK2\(_AT\) or of the polyP granule-associated phosin PptA from \(\textit {Ralstonia eutropha}\) always co-localized with polyP granules in \(\textit {A. tumefaciens}\) and allowed the tracking of polyP granules in time-lapse microscopy experiments without the necessity to label the cells with the toxic dye DAPI. Fusions of PPK1\(_AT\) with mCherry formed fluorescent signals often attached to, but not completely co-localizing with, polyP granules in wild-type cells. Time-lapse microscopy revealed that polyP granules in about one-third of a cell population migrated from the old pole to the new cell pole shortly before or during cell division. Many cells de novo formed a second (nonmigrating) polyP granule at the opposite cell pole before cell division was completed, resulting in two daughter cells each having a polyP granule at the old pole after septum formation. Migration of polyP granules was disordered in mitomycin C-treated or in PopZ-depleted cells, suggesting that polyP granules can associate with DNA or with other molecules that are segregated during the cell cycle.
Author: | Celina HellenbroichGND, Daniel PfeifferORCiDGND, Meriyem AktasORCiDGND, Dieter JendrossekORCiDGND |
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URN: | urn:nbn:de:hbz:294-101539 |
DOI: | https://doi.org/10.1159/000521970 |
Parent Title (English): | Mikrobial physiology |
Publisher: | Karger |
Place of publication: | Basel |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2023/09/12 |
Date of first Publication: | 2022/02/15 |
Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
Tag: | Polyphosphate; Polyphosphate kinase; Polyphosphatosome |
Volume: | 32 |
Issue: | 3/4 |
First Page: | 71 |
Last Page: | 82 |
Note: | Dieser Beitrag ist aufgrund einer konsortialen Lizenz frei zugänglich. |
Institutes/Facilities: | Lehrstuhl für Biologie der Mikroorganismen |
Dewey Decimal Classification: | Naturwissenschaften und Mathematik / Biowissenschaften, Biologie, Biochemie |
open_access (DINI-Set): | open_access |
faculties: | Fakultät für Biologie und Biotechnologie |
Licence (German): | Konsortiale Lizenz |