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Katena32
2 months ago
7

Enolase is an enzyme that catalyzes one reaction in glycolysis in all organisms that carry out this process. The amino acid sequ

ence of enolase is similar but not identical in the organisms. Researchers purified enolase from Saccharomyces cerevisiae, a single-celled eukaryotic yeast that grows best at 37°C , and from Chloroflexus aurantiacus, a bacterium that grows best at the much higher temperature of 55°C . The researchers compared the activity of purified enolase from the two organisms by measuring the rate of the reaction in the presence of varying concentrations of substrate and a constant amount of each enzyme at both 37°C and 55°C .
Biology
1 answer:
-BARSIC- [2.5K]2 months ago
5 0

Answer:

Changes in pH levels affect enzymes. Enzymes operate optimally at an ideal pH value, which is the most conducive pH for their activity. Deviations from this optimal pH can impact enzyme function. Consequently, enzymes demonstrate catalytic activity most effectively at their ideal pH.

When enzymes are exposed to very low or high pH levels, hydrogen ions interact with the amino acids located at the active site. This interaction alters the configuration of the amino acids, affecting how the enzyme operates.

In measuring the activity of enolase, 2-phosphoglyceraldehyde serves as its substrate in a reaction vessel. After proper incubation, the output (PEP) is measured. The ratio of PEP to 2-phosphoglyceraldehyde provides insights into the enzyme's activity.

For the negative control, a reaction vessel is used that does not contain any enolase. This setup helps eliminate any transformation of 2-phosphoglyceraldehyde to PEP in the absence of the enzyme.

All enzymes present in our bodies adapt to the environments we inhabit. This makes C. aurantiacus effective, as the optimal temperature for enolase is 55 degrees. Thus, this enzyme will consistently perform more efficiently at 55 degrees than at 37 degrees.

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