The G zipper motif is found in transmembrane proteins at an above random frequency and there are models explaining how it might help with multiple transmembrane intra-membrane helix bundle assembly.

However there are a bunch of different "flavours" of these G zipper motifs. Here are the ones I have come across so far:


I don't think I am completely up to date so that is a non-exhaustive list. Have I missed any? Broadly speaking what accounts for their variation?

note: X refers to a non specific amino acid in FASTA protein sequences.

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    $\begingroup$ It seems to be a small family as per pfam. And frankly I had never heard of glycine zippers till now (so thanks for that). Perhaps this may be useful. $\endgroup$ – WYSIWYG Jun 28 '15 at 18:43

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