How to name polypeptides ???

Question

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Answer 1

I never learned how to name them, make the nucleotides into codons, which then translate to amino acids and make up the protein sequence.

After you get your sequence, I guess you could look it up or something. The entire chain should make the protein you want (name).

Answer 2

Peptides (from the Greek πεπτος, "digestible") are the family of short molecules formed from the linking, in a defined order, of various α-amino acids. The link between one amino acid residue and the next is an amide bond and is sometimes referred to as a peptide bond.

Proteins are polypeptide molecules (or consist of multiple polypeptide subunits). The distinction is that peptides are short and polypeptides proteins are long. There are several different conventions to determine these, all of which have flaws.

One convention is that those peptide chains that are short enough to be made synthetically from the constituent amino acids are called peptides rather than proteins. However, with the advent of better synthetic techniques, peptides as long as hundreds of amino acids can be made, including full proteins like ubiquitin. Native chemical ligation has given access to even longer proteins, so this convention seems to be outdated.


A polypeptide is a single linear chain of amino acids.
A protein are one or more polypeptides more than about 50 amino acids long.
An oligopeptide or (simply) a peptide is a polypeptide less than 30-50 amino acids long.
A dipeptide has two amino acids.
A tripeptide has three amino acids.
A pentapeptide has five amino acids.
A neuropeptide is a peptide that is active in association with neural tissue.
A peptide hormone is a peptide that acts as a hormone.