Bacterial birth scar proteins mark future flagellum assembly site

Article Abstract:

Two developmental proteins, TipN and TipF, which localize to the division septum and the newborn pole after division, are identified. It is shown that septal localization of TipN/F depends on cytokinesis, thus, TipN and TipF establish a link between bacterial cytokinesis and polar asymmetry, demonstrating that division does indeed leave a positional mark in its wake to direct the biogenesis of a polar organelle.

Cytokinesis

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A molecular beacon defines bacterial cell asymmetry

Article Abstract:

Many cells divide asymmetrically by generating two different cell ends or poles prior to cell division but the mechanism by which cells distinguish one pole from the other is poorly understood. A protein that defines one specific pole of a bacterial cell by localizing to the site of cell division to be inherited by both progeny at the resulting new poles is described.

Cell physiology

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Break on through to the other side: outer membrane penetration of the nascent flagellum by a stop-polymerization mechanism

Article Abstract:

A stop-polymerization model is used as a mechanism for outer membrane penetration of the flagellum. This mechanism plays important role in self-assembly processes of flagella.

Petroleum Refineries, Petroleum refining, Polymerization, Flagella (Microbiology), Flagella, Cell membranes, Structure

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