BIO181 Discussion Roles of phosphorylation in protein function.

Phosphorylation is an essential aspect of the activity of proteins since it is responsible for the formation of signal transduction pathways. Phosphorylation is the typical mechanism used to create proteins and is also responsible for the transmission of signals throughout the cell (Sauve et al., 2018). When taking into account the fact that insulin is a hydrophilic molecule that cannot pass through the plasma membrane, this can be demonstrated to be the case. The process of phosphorylation can transmit signals that are compatible with the receptor. Once construction is finished, the receptor will go through the conformation process, which will allow insulin to cross the plasma membrane. Phosphorylation is essential for a number of reasons, including the fact that it helps activate and deactivate enzymes, so contributing to the regulation of cell activity. The incorporation of phosphate groups into these amino acids can cause these proteins to behave differently. This can take the form of a change in their enzymatic activity (i.e. turning it on or off), a change in their connection with other proteins, or a change in their location within the cell. Multiple amino acids may be phosphorylated by each protein kinase, depending on the specific enzyme.

How may the activation of a transcription factor result in long-term modifications to the cellular structure?

When, for example, an enzyme that speeds up the metabolism of sugar is activated, this phenomenon takes place. Generally speaking, shifts in the levels of DNA transcription are the cause of long-term cellular alterations. For instance, a protein may be manufactured to start the replication of cellular DNA by stimulating the cell division cycle. In other words, the long-term effect is DNA transcription that is changed, which indicates that it is capable of causing serious damage.

References

Sauvé, V., Sung, G., Soya, N., Kozlov, G., Blaimschein, N., Miotto, L. S., … & Gehring, K. (2018). Mechanism of parkin activation by phosphorylation. Nature structural & molecular biology, 25(7), 623-630.