Chemical Forums

Specialty Chemistry Forums => Biochemistry and Chemical Biology Forum => Topic started by: xk9x on December 12, 2006, 09:37:57 PM

Title: Help naming polypeptides
Post by: xk9x on December 12, 2006, 09:37:57 PM

Hello all.

Today in my Nuc/Org. class we briefly discussed polypeptides at the end of the lecture. My teacher told us to find the name for the tripeptide formed from glycine, phenylalanine, and methionine.

The example in class was of a dipeptide formed from alanine and cysteine. The name of that was alanylcysteine.

So, for the Gly + Phe + Met, would the correct name be glycylphenylalanylmethionine? Is there supposed to be a space in there, or is my name totally incorrect? Thanks everyone.

Title: Re: Help naming polypeptides
Post by: Yggdrasil on December 12, 2006, 10:08:59 PM

Looks like a good name to me.  For clarity some people put dashes, (e.g. alanyl-cysteine) but those are optional.

Title: Re: Help naming polypeptides
Post by: Palmbeach on April 25, 2007, 05:09:40 PM

How long peptides can you give names? I mean just reel aminoacids seems tedious to me, small peptides I would just write the sequence one letter code and thats it!  ;D

Title: Re: Help naming polypeptides
Post by: Yggdrasil on April 25, 2007, 10:21:07 PM

I agree with you palmbeach.  I guess IUPAC just has to have a name for everything even if the name is the least efficient way of identifying certain peptides.  Just imagine if NCBI had all of its protein sequences written out as methionylalanyllysylphenylalanylaspartyl...