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23 May 2010 14:37:55 IST

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Examples of amino acid side chains that may hydrogen bond to each other:

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Examples of amino acid side chains that may hydrogen bond to each other:

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edison

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21 Sep 2011 17:35:56 IST

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Hydrogen Bonding:

Hydrogen bonding between "side chains" occurs in a variety of circumstances. The most usual cases are between two alcohols, an alcohol and an acid, two acids, or an alcohol and an amine or amide. In giving the structures for various examples, the backbone of the protein fragment will be represented by a short helix with only the side chain structure given as in the graphic on the left.

In the prion protein, tyr 128 is hydrogen bonded to asp 178, which cause one part of the chain to be bonding with a part some distance away.

Examples of amino acid side chains that may hydrogen bond to each other:

Two alcohols: ser, thr, and tyr.
Alcohol and an acid: asp and tyr
Two acids: asp and glu
Alcohol and amine: ser and lys
Alcohol and amide: ser and asn

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