A protein contains an arginine and an aspartic acid that interact electrostatica

Question

A protein contains an arginine and an aspartic acid that interact electrostatically (through ionic bonds) as depicted in the structure at right. In the drawing, nitrogen is colored blue, oxygen is red, carbon is green, and hydrogen is white. Do you expect this interaction to favor the protonation or deprotonation of the Asp residue? Does the interaction tend to increase or decrease the pKa of the Asp? Explain your thinking.

Unfortunately, a picture of the interaction was not included so this is the info to be used to answer the question!

Explanation / Answer

Protonation is said to be, Addition of proton whereas, removal of the proton is said to be deprotonation according to lowry brown state theory.

Yes, it will favor the protonation and deprotonation properties of the Asp residue. Due to this interactions, the Pka of the Asp residue will increase or decrease. In this picture there no side chains have shown about the carboxylic acids and its ability about loosing or donating the protons to become acidic or basic.

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