2d91
From Proteopedia
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Structure of HYPER-VIL-lysozyme
Overview
New techniques are presented for the preparation of iodine derivatives, involving vapour diffusion of iodine. Firstly, in the vaporizing iodine, labelling (VIL) technique, a small amount of KI/I(2) solution is enclosed, in a crystallization well, with the result that gaseous I(2) molecules, diffuse into the crystallization droplets without exerting substantial, changes in ionic strength in the target crystals. Once they have diffused, into the droplet, the I(2) molecules sometimes iodinate accessible, tyrosines at ortho positions. Secondly, when iodination is insufficient, the hydrogen peroxide VIL (HYPER-VIL) technique can be further applied to, increase the iodination ratio by the addition of a small droplet of, hydrogen peroxide (H(2)O(2)) to the crystallization well; the gaseous, H(2)O(2) also diffuses into the crystallization droplet to emphasize the, iodination. These techniques are most effective for phase determination, when coupled with softer X-rays, such as those from Cu Kalpha or Cr Kalpha, radiation. The effectiveness of these techniques was assessed using five, different crystals. Four of the crystals were successfully iodinated, providing sufficient phasing power for structure determination.
About this Structure
2D91 is a Single protein structure of sequence from Gallus gallus with IOD as ligand. Active as Lysozyme, with EC number 3.2.1.17 Full crystallographic information is available from OCA.
Reference
New methods to prepare iodinated derivatives by vaporizing iodine labelling (VIL) and hydrogen peroxide VIL (HYPER-VIL)., Miyatake H, Hasegawa T, Yamano A, Acta Crystallogr D Biol Crystallogr. 2006 Mar;62(Pt 3):280-9. Epub 2006, Feb 22. PMID:16510975
Page seeded by OCA on Wed Nov 21 09:29:40 2007
