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Stochastic antagonism between two proteins governs a bacterial cell fate switch.

08:00 EDT 4th October 2019 | BioPortfolio

Summary of "Stochastic antagonism between two proteins governs a bacterial cell fate switch."

Cell fate decision circuits must be variable enough for genetically identical cells to adopt a multitude of fates, yet ensure that these states are distinct, stably maintained, and coordinated with neighboring cells. A long-standing view is that this is achieved by regulatory networks involving self-stabilizing feedback loops that convert small differences into long-lived cell types. We combined regulatory mutants and in vivo reconstitution with theory for stochastic processes to show that the marquee features of a cell fate switch in -discrete states, multigenerational inheritance, and timing of commitments-can instead be explained by simple stochastic competition between two constitutively produced proteins that form an inactive complex. Such antagonistic interactions are commonplace in cells and could provide powerful mechanisms for cell fate determination more broadly.

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This article was published in the following journal.

Name: Science (New York, N.Y.)
ISSN: 1095-9203
Pages: 116-120

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Medical and Biotech [MESH] Definitions

A subclass of LIM domain proteins that include an additional centrally-located homeodomain region that binds AT-rich sites on DNA. Many LIM-homeodomain proteins play a role as transcriptional regulators that direct cell fate.

A notch receptor and proto-oncogene protein characterized by a large extracellular domain that consists of 29 EPIDERMAL GROWTH FACTOR - like repeat sequences (EGF repeats) and five ANKYRIN REPEATS. It functions as a receptor for SERRATE-JAGGED PROTEINS and Delta1 (DLK1) protein to control cell fate determination.

Periplasmic proteins that scavenge or sense diverse nutrients. In the bacterial environment they usually couple to transporters or chemotaxis receptors on the inner bacterial membrane.

Bacterial proteins that share the property of binding irreversibly to PENICILLINS and other ANTIBACTERIAL AGENTS derived from LACTAMS. The penicillin-binding proteins are primarily enzymes involved in CELL WALL biosynthesis including MURAMOYLPENTAPEPTIDE CARBOXYPEPTIDASE; PEPTIDE SYNTHASES; TRANSPEPTIDASES; and HEXOSYLTRANSFERASES.

Genes that determine the fate of a cell or CELLS in a region of the embryo during EMBRYONIC DEVELOPMENT.

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