Ronnie,
There are several. The example I know is 1DBI - I have little doubt
that there are more out there...
If you are interested by the close proximity in sequence then you might
also like to know that there are examples of 'CC' motifs with disulfides
- look at 1KB0 - a PQQ-dependant alcohol dehydrogenase by Oubrie et al.
- Allister Crow
John Innes Centre
On 05/04/2011 13:55, Ronnie wrote:
I have a question related to protein structure, but not crystallography
per se. Has anyone see a disulfide forming between the two cys of "CXC"
in the middle of a loop, and create a sharp turn, where X is not a
proline? I seems to me that geometrically this would be possible but I
am not sure how stable it is, or how energetically unfavorable it might be.
thanks so much for your input!
Ronnie
