The following is a segment of the DNA template that codes for human insulin: TTT GTG AAC CAA CAC CTG
b. Write the three-letter and one-letter abbreviations for this corresponding peptide segment.

Question

The following is a segment of the DNA template that codes for human insulin: TTT GTG AAC CAA CAC CTG

b. Write the three-letter and one-letter abbreviations for this corresponding peptide segment.

Accepted Answer

All right. Hello everyone. So this question says to identify the peptide segment corresponding to this DNA template coding for a segment of an enzyme. We have gatcctataggatcg provide the one letter and three letter abbreviations. All right. So this question is asking us to recall the concepts of both transcription and translation because in transcription, we recall that DNA is converted into an MRNA molecule. And then after translation, just move this a little bit towards the center here. But during translation, that MRNA molecule is used to create a protein but to be more precise, right, what's happening is that the Mrna codes for the polypeptide sequence that eventually undergoes folding to produce the, the complete protein. So the first thing we have to do is find the MRN a sequence from this DNA template and then convert the MRN A into what amino acids are produced. So first, let me just go ahead and copy out the DNA. So that's GAT CCT A T A GG A and TCG. Now, when it comes to finding the MRN A sequence, all we have to do is recall our complementary base pairing rules. Now, thymine doesn't exist in MRN A right. Instead, we're going to see uracil. So it's important to recall here that adenine binds with uracil and vice versa. And cytosine binds with guanine and vice versa. Now, because we are starting with a DNA template, it's important to recognize that adenine pairs with thymine and vice versa in DNA. And so using our complementary base rules, the first segment of DNA here is G A G pairs with C A pairs with you and Mr and T pairs with A. So our first coon in the MRN is CU A, we call that codons are groups of three nucleotides in RN A, that each code for one amino acid. So one code on one group of three nucleotides equals one amino acid. So up next, we have T in our DNA which would give GG A, an MRN A, then we have a T A which would pair with UAU GG A that would pair with CC and TCG that would pair with a GC. And so now that we have our MNA segment using our genetic code, we compare each coon in the MRNA to the resulting amino acid and that is going to help us with our peptide or finding our peptide. Now, the good news is that you don't have to memorize these coons except for a few select ones because there's a very convenient table available to match each coat on to the amino acid. So, referencing that table and starting with our first code on here CU A that matches with Lucy. So that's our first amino acid and the three letter abbreviation is L EU from there, we have GA which would code for Glycine or Gy. Then we have you a, you which produces tyrosine or Tyr, then we have CC which would code for Prolene or Pr O and then we have GC at the very end which codes for Siri or S er and so as you can see here, we do have the amino acid sequence using our three letter abbreviations. So let's go ahead and recall our one letter abbreviations. Now, sometimes they're intuitive and sometimes they're not right. For example, the one letter code of lucine is simply the letter L for glycine, it's the letter G. But for tyrosine, it's actually the letter Y though for Prolene, it's the letter P and for Siri, it's the letter S, but now here you have it, we have our amino acid sequence, our peptide sequence using both three letter and one letter abbreviations. And so with that being said, thank you so very much for watching. And I hope you found this helpful.

The following is a segment of the DNA template that codes for human insulin: TTT GTG AAC CAA CAC CTG
b. Write the three-letter and one-letter abbreviations for this corresponding peptide segment.

Verified video answer for a similar problem:

Key Concepts

DNA Codons

Amino Acids and Their Abbreviations

Translation Process