How do covalent disulfide bonds, hydrogen bonds with wat...

Question

How do covalent disulfide bonds, hydrogen bonds with water, and hydrophobic interactions all contribute to a protein's tertiary structure?

Accepted Answer

Welcome back everyone. Let's look at our next question What type of bond is responsible for stabilizing the tertiary structure of proteins containing the amino acid Sistine. When we look at our answer choices, we've got the choice of three different types of bonds and twisty none of the above. So there's the potential that none of those is the right answer. So of course we'll want to start in the first place by looking at what the structure of is, remembering what it's our group is. So here is 16. And the side chain that makes this team is the style group S. H. And as we can recall more content videos. S. H. Forms an actual coe violent bond with other 16 other residues in a protein. It forms a co valent bond between the two sulfur atoms on to residues forming a di sulfide bond. So choice C. Is our answer here. A di sulfide bond. Being Covalin is very strong and very stable. So that actually does stabilize kind of hold in place that tertiary structure of the protein. Since we have a correct answer, we can go ahead and eliminate choice D none of the above. But let's look at our other two answers to understand why they are not correct. Choice A. Is ionic bond but of course an ionic bond forms when you have charged amino acids specifically opposite charges that attract each other. But as we see, 16 is not a charged amino acid. So that's not a correct answer. And finally choice be hydrogen bond. Well hydrogen bonds are very weak links that attraction between the partial positive and partial negative charge. They wouldn't be a stabilizing element in this tertiary structure. They just kind of cause this week attraction there. So that's why that's not our correct answer. So we eliminate Choice B. So what is the type of bond responsible for stabilizing? That tertiary structure with Sistine is choice E. Di sulfide bond. See you in the next video.

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How do covalent disulfide bonds, hydrogen bonds with water, and hydrophobic interactions all contribute to a protein's tertiary structure?