I have a 3.0 A structure which has a Mg liganded by a His NE and a substrate
carboxylate at around 2.1 -2.3 A.
There are a number of other potential liganding amino acid atoms at between 3.2
and 4.5 A. This is clearly
longer than the direct bonding distances found by Harding
http://journals.iucr.org/d/issues/1999/08/00/ad0073/index.html
but these could conceively be coordinating via a water not visible at this
resolution.
I wondered if anyone knew of a tabulation of amino-acid to ion via water distances (ie second coordination sphere
distances). I have not been able to google one so far.
Thanks
nick
--
Dr Nicholas H. Keep
Dean of Faculty of Science
Reader in Structural Biology
School of Crystallography,
Birkbeck, University of London,
Malet Street,
Bloomsbury
LONDON
WC1E 7HX
email n.k...@mail.cryst.bbk.ac.uk
Telephone 020-7631-6852 (Room G57 Office)
020-7631-6868 (Rosalind Franklin Laboratory)
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