Role
Unlike fibrous proteins which only play a structural function, globular proteins can act as:
- Enzymes, by catalyzing organic reactions taking place in the organism in mild conditions and with a great specificity. Different esterases fulfill this role.
- Messengers, by transmitting messages to regulate biological processes. This function is done by hormones, i.e. insulin etc.
- Transporters of other molecules through membranes
- Stocks of amino acids.
- Regulatory roles are also performed by globular proteins rather than fibrous proteins.
- Structural proteins, e.g., actin and tubulin, which are globular and soluble as monomers, but polymerize to form long, stiff fibers
Read more about this topic: Globular Proteins
Famous quotes containing the word role:
“Nothing is ever simple. What do you do when you discover you like parts of the role you’re trying to escape?”
—Marilyn French (b. 1929)
“Certainly parents play a crucial role in the lives of individuals who are intellectually gifted or creatively talented. But this role is not one of active instruction, of teaching children skills,... rather, it is support and encouragement parents give children and the intellectual climate that they create in the home which seem to be the critical factors.”
—David Elkind (20th century)
“Whether or not you have children yourself, you are a parent to the next generation. If we can only stop thinking of children as individual property and think of them as the next generation, then we can realize we all have a role to play.”
—Charlotte Davis Kasl (20th century)