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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2016 ; 7
(ä): 13631
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Proliferation of Listeria monocytogenes L-form cells by formation of internal and
external vesicles
#MMPMID27876798
Studer P
; Staubli T
; Wieser N
; Wolf P
; Schuppler M
; Loessner MJ
Nat Commun
2016[Nov]; 7
(ä): 13631
PMID27876798
show ga
L-forms are cell wall-deficient bacteria that divide through unusual mechanisms,
involving dynamic perturbations of the cellular shape and generation of vesicles,
independently of the cell-division protein FtsZ. Here we describe
FtsZ-independent mechanisms, involving internal and external vesicles, by which
Listeria monocytogenes L-forms proliferate. Using micromanipulation of single
cells and vesicles, we show that small vesicles are formed by invagination within
larger intracellular vesicles, receive cytoplasmic content, and represent viable
progeny. In addition, the L-forms can reproduce by pearling, that is, generation
of extracellular vesicles that remain transiently linked to their mother cell via
elastic membranous tubes. Using photobleaching and fluorescence recovery, we
demonstrate cytoplasmic continuity and transfer through these membranous tubes.
Our findings indicate that L-forms' polyploidy and extended interconnectivity
through membranous tubes contribute to the generation of viable progeny
independently of dedicated division machinery, and further support L-forms as
models for studies of potential multiplication mechanisms of hypothetical
primitive cells.