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1gwa
From Proteopedia
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| - | [[Image:1gwa.gif|left|200px]]<br /> | + | [[Image:1gwa.gif|left|200px]]<br /><applet load="1gwa" size="450" color="white" frame="true" align="right" spinBox="true" |
| - | <applet load="1gwa" size="450" color="white" frame="true" align="right" spinBox="true" | + | |
caption="1gwa, resolution 1.85Å" /> | caption="1gwa, resolution 1.85Å" /> | ||
'''TRIIODIDE DERIVATIVE OF PORCINE PANCREAS ELASTASE'''<br /> | '''TRIIODIDE DERIVATIVE OF PORCINE PANCREAS ELASTASE'''<br /> | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1GWA is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Sus_scrofa Sus scrofa] with CA, SO4 and IOD as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Pancreatic_elastase Pancreatic elastase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.36 3.4.21.36] | + | 1GWA is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Sus_scrofa Sus scrofa] with CA, SO4 and IOD as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Pancreatic_elastase Pancreatic elastase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.36 3.4.21.36] Known structural/functional Site: <scene name='pdbsite=CAA:So4 Binding Site For Chain A'>CAA</scene>. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1GWA OCA]. |
==Reference== | ==Reference== | ||
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[[Category: zymogen]] | [[Category: zymogen]] | ||
| - | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Dec 18 15:41:30 2007'' |
Revision as of 13:31, 18 December 2007
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TRIIODIDE DERIVATIVE OF PORCINE PANCREAS ELASTASE
Overview
A series of experiments performed at Cu Kalpha wavelength on in-house, X-ray equipment are presented which investigate two possibilities for, enhancing the experimental phasing signal by means of (i) triiodide/iodide, soaks using KI/I(2) and (ii) combinations of counter-ions introduced using, the short cryosoak method. Triiodide-derivative crystal structures for, five test proteins have been refined and reveal that iodine can bind as, polyiodide and single iodide ions through hydrophobic and hydrogen-bonding, interactions both at the molecular surface and in intramolecular and, intermolecular cavities. In three cases, the structures could be, automatically determined with autoSHARP using in-house SAD and SIRAS data., The investigation of combinatorial counter-ion replacement using multiple, salts with Na(+) and Cs(+) as cations and I(-) and Cl(-) as anions reveals, that, for the case of hen egg-white lysozyme, significant improvement in, phasing signal is obtained by the combined use of salts compared with, SIRAS methods using native and single short-soak derivative data sets.
About this Structure
1GWA is a Single protein structure of sequence from Sus scrofa with CA, SO4 and IOD as ligands. Active as Pancreatic elastase, with EC number 3.4.21.36 Known structural/functional Site: . Full crystallographic information is available from OCA.
Reference
Triiodide derivatization and combinatorial counter-ion replacement: two methods for enhancing phasing signal using laboratory Cu Kalpha X-ray equipment., Evans G, Bricogne G, Acta Crystallogr D Biol Crystallogr. 2002 Jun;58(Pt 6 Pt 2):976-91. Epub, 2002 May 29. PMID:12037300
Page seeded by OCA on Tue Dec 18 15:41:30 2007
Categories: Pancreatic elastase | Single protein | Sus scrofa | Bricogne, G. | Evans, G. | CA | IOD | SO4 | Hydrolase | Serine protease | Signal | Zymogen
