1ok0
From Proteopedia
(New page: 200px<br /><applet load="1ok0" size="450" color="white" frame="true" align="right" spinBox="true" caption="1ok0, resolution 0.93Å" /> '''CRYSTAL STRUCTURE OF...) |
|||
| Line 1: | Line 1: | ||
| - | [[Image:1ok0.jpg|left|200px]]<br /><applet load="1ok0" size=" | + | [[Image:1ok0.jpg|left|200px]]<br /><applet load="1ok0" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1ok0, resolution 0.93Å" /> | caption="1ok0, resolution 0.93Å" /> | ||
'''CRYSTAL STRUCTURE OF TENDAMISTAT'''<br /> | '''CRYSTAL STRUCTURE OF TENDAMISTAT'''<br /> | ||
==Overview== | ==Overview== | ||
| - | The crystal structure of the proteinaceous alpha-amylase inhibitor | + | The crystal structure of the proteinaceous alpha-amylase inhibitor tendamistat has been determined at 100 K to a resolution of 0.93 A. The final R factor for all reflections with F > 4sigma(F) is 9.26%. The mean coordinate error for fully occupied protein atoms as derived from full-matrix inversion is 0.018 A. An extended network of multiple discrete conformations has been identified on the side of tendamistat that binds to the target molecule. Most notably, residue Tyr15, which interacts with the glycine-rich loop characteristic of mammalian amylases, and a cluster of amino-acid side chains surrounding it are found in two well defined conformations. The flexibility observed in this crystal structure together with information about residues fixed by lattice contacts in the crystal but found to be mobile in a previous NMR study supports a model in which most of the residues involved in binding are not fixed in the free form of the inhibitor, suggesting an induced-fit type of binding. |
==About this Structure== | ==About this Structure== | ||
| - | 1OK0 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Streptomyces_tendae Streptomyces tendae] with CL and GOL as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http:// | + | 1OK0 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Streptomyces_tendae Streptomyces tendae] with <scene name='pdbligand=CL:'>CL</scene> and <scene name='pdbligand=GOL:'>GOL</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1OK0 OCA]. |
==Reference== | ==Reference== | ||
| Line 14: | Line 14: | ||
[[Category: Streptomyces tendae]] | [[Category: Streptomyces tendae]] | ||
[[Category: Koenig, V.]] | [[Category: Koenig, V.]] | ||
| - | [[Category: Schneider, T | + | [[Category: Schneider, T R.]] |
[[Category: Vertesy, L.]] | [[Category: Vertesy, L.]] | ||
[[Category: CL]] | [[Category: CL]] | ||
| Line 20: | Line 20: | ||
[[Category: alpha amylase inhibitor]] | [[Category: alpha amylase inhibitor]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:18:39 2008'' |
Revision as of 12:18, 21 February 2008
|
CRYSTAL STRUCTURE OF TENDAMISTAT
Overview
The crystal structure of the proteinaceous alpha-amylase inhibitor tendamistat has been determined at 100 K to a resolution of 0.93 A. The final R factor for all reflections with F > 4sigma(F) is 9.26%. The mean coordinate error for fully occupied protein atoms as derived from full-matrix inversion is 0.018 A. An extended network of multiple discrete conformations has been identified on the side of tendamistat that binds to the target molecule. Most notably, residue Tyr15, which interacts with the glycine-rich loop characteristic of mammalian amylases, and a cluster of amino-acid side chains surrounding it are found in two well defined conformations. The flexibility observed in this crystal structure together with information about residues fixed by lattice contacts in the crystal but found to be mobile in a previous NMR study supports a model in which most of the residues involved in binding are not fixed in the free form of the inhibitor, suggesting an induced-fit type of binding.
About this Structure
1OK0 is a Single protein structure of sequence from Streptomyces tendae with and as ligands. Full crystallographic information is available from OCA.
Reference
Structure of the alpha-amylase inhibitor tendamistat at 0.93 A., Konig V, Vertesy L, Schneider TR, Acta Crystallogr D Biol Crystallogr. 2003 Oct;59(Pt 10):1737-43. Epub 2003, Sep 19. PMID:14501112
Page seeded by OCA on Thu Feb 21 14:18:39 2008
