Molecule of Ribonuclease -A and substrate

Molecule of Ribonuclease -A and substrate

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Credit: J.C. REVY, ISM/SCIENCE PHOTO LIBRARY

Caption: Molecular computer graphics image of a close-up of the interaction of ribonuclease-A with its reactant substrate. Ribonuclease-A is an enzyme involved in the destruction of messenger RNA (mRNA) in the cytoplasm of bacteria. Here, the substrate (orange/white & blue sticks) fits into a depression (the active site) in the surface of the enzyme (yellow). Enzymes are biological catalysts, proteins that speed up the rates of reactions within cells. Each enzyme is specific for a particular reaction; interaction occurs (typically as a weak bond) between enzyme & substrate at the active site, due to the arrang- ement of mutually-attractive groups of atoms The blue dots apparently represent the short contacts between substrate & enzyme.

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Keywords: bacteria, chemical, chemistry, compound, compounds, enzyme, enzyme and, enzyme-substrate reaction, enzymes, lock and key, messenger rna, molecular graphic, molecule, molecules, mrna, ribonuclease-a, ribonuclease-a and, substrate

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