Meaning of Cytosol

What is Cytosol:

Cytosol is the intracellular fluid of cells that makes up most of what is called the cytoplasm in cells

The word cytosol has its origin in Greek and is composed of the words solu- indicating "soluble" and referring to "cell-related", in this case to the cytoplasm. In its etymological sense, the cytosol would be the soluble part of the cytoplasm. In some texts, the cytosol is also called hyaloplasm.

Swimming in the middle of the cytosol are all the elements that make up the cytoplasm, being them: the structural proteins or cytoskeleton and the organelles or organelles. The cytosol or cytoplasmic matrix, together with the mentioned elements, is also part of the cytoplasm.

Most metabolic reactions occur in the cytosol.For example, all proteins synthesized in eukaryotic cells (with cell nuclei) are produced in the cytosol. The only exceptions are some proteins that are synthesized in mitochondria in animal cells and in chloroplasts in plant cells.

The composition of the cytosol will depend on the nature and function of the cell. In general, the cytosol is made up of water, ions, macromolecules, and smaller organic molecules.

The cytosol ions can be, for example, calcium, potassium or sodium. The molecules that we can find in the cytosol can be sugars, polysaccharides, amino acids, nucleic acids and fatty acids.

Importance of the cytosol

One of the most important processes in cells occurs in the cytosol: protein synthesis. In eukaryotic cells, the information to synthesize specific proteins is stored within DNA (deoxyribonucleic acid), in the cell nucleus.

The messenger RNA (ribonucleic acid) will be in charge of carrying the DNA information, crossing the nuclear envelope, through the nuclear pores to the cytosol. In the cytosol, are the ribosomes with which the mRNA will associate for the beginning of translation or protein synthesis.

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