Question

What amino acid sequence does the following mRNA nucleotide sequence specify? 5′−AUGAACCUAUGC−3′ Express the sequence of amino acids using the three-letter abbreviations, separated by hyphens (e.g., Met-Ser-Thr-Lys-Gly).

Answer 1

The given sequence of mRNA is $5`- {\color{Red} AUG}AAC{\color{Red} CUA}UGC-3`$

The first 3 letters represent the codon AUG, which is the start codon and codes for the amino acid  Met(Methionine).

Hence, the first amino acid in the sequence is Met.

The next 3 letter codon is AAC. It codes for the amino acid Asn(Asparagine).

Hence, the second amino acid in the sequence is Asn.

The next three letter code is CUA. It codes for Leu (Leucine).

Hence, the third amino acid in the sequence is Leu.

The next three letter code is UGC. It codes for Cys(Cysteine).

Hence, the last amino acid in the sequence is Cys.

Hence, the amino acid sequence coded by the given mRNA is Met-Asn-Leu-Cys.