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signaling through the cell matrix (in English)
Alvaro Macieira-Coelho
(Illustrated by)
·
Springer
· Paperback
signaling through the cell matrix (in English) - Macieira-Coelho, Alvaro
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Synopsis "signaling through the cell matrix (in English)"
The genetic information contained in a cell needs the appropriate environment to express itself, not only the intracellular environment but also the extracel- lular one. The latter is provided to a great extent by the molecules which constitute the extracellular matrix. On the one hand, the matrix creates inter alia the right pH and osmotic envi- ronment and allows the diffusion of messengers targeting the cell membrane; on the other hand, it has a mechanical effect whose relevance began to be understood 28 years ago. Basically, the messages that reach the cell and are then transported to the genome depend on molecular conformational flexibility. Molecular structures usually prevail because they represent states of minimum potential energy cre- ating energy barriers which are activated through conformational changes. From the periphery to the nucleus the information flows through the activa- tion of energy barriers. The tools used to switch from low-energy to high- energy molecular configurations are: the binding of ligands to their receptors, gradients of electrochemical potential created by ion pumps, Ca2+ mobiliza- tion, and phosphorylation and dephosphorylation. Variation in molecular con- figuration through molecular binding is in itself sufficient to trigger ion pumps and activate kinases and phosphatases. This is one aspect of the mechanical role of the extracellular matrix dealt with herein: the induction of molecular and supramolecular conformational modifications through interactions with the cell membrane, which promote the transduction and centripetal progression of signals.
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The book is written in English.
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