[Protein-analysis] Re: why left handed helix is not found

Dr Engelbert Buxbaum engelbert_buxbaum at hotmail.com
Thu Jul 6 06:02:08 EST 2006


sandeep wrote:

> does anybody know why left handed helix is not found in naturally
> occuring proteins i got one PDB entry(1MIC) with a left handed protein
> please comment on it

Because with l-amino acids in a left handed helix the beta-carbon and
carbonyl-oxygen would collide. Since that is not possible, there would
be considerable strain on the backbone, which makes such a structure
improbable.

Both this and your other question could have been easily answered by
appropriate textbooks. Are you a troll?


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