1ua3
From Proteopedia
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| - | [[Image:1ua3.jpg|left|200px]] | + | [[Image:1ua3.jpg|left|200px]] |
| - | + | ||
| - | '''Crystal structure of the pig pancreatic a-amylase complexed with malto-oligosaccharides''' | + | {{Structure |
| + | |PDB= 1ua3 |SIZE=350|CAPTION= <scene name='initialview01'>1ua3</scene>, resolution 2.01Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=GLC:GLUCOSE'>GLC</scene>, <scene name='pdbligand=MAL:MALTOSE'>MAL</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MLR:MALTOTRIOSE'>MLR</scene> and <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Alpha-amylase Alpha-amylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.1 3.2.1.1] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''Crystal structure of the pig pancreatic a-amylase complexed with malto-oligosaccharides''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1UA3 is a [ | + | 1UA3 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Sus_scrofa Sus scrofa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UA3 OCA]. |
==Reference== | ==Reference== | ||
| - | Crystal structure of the pig pancreatic alpha-amylase complexed with malto-oligosaccharides., Payan F, Qian M, J Protein Chem. 2003 Apr;22(3):275-84. PMID:[http:// | + | Crystal structure of the pig pancreatic alpha-amylase complexed with malto-oligosaccharides., Payan F, Qian M, J Protein Chem. 2003 Apr;22(3):275-84. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12962327 12962327] |
[[Category: Alpha-amylase]] | [[Category: Alpha-amylase]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: MAL]] | [[Category: MAL]] | ||
[[Category: MLR]] | [[Category: MLR]] | ||
| - | [[Category: beta-alpha- | + | [[Category: beta-alpha-barrel]] |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 14:29:22 2008'' |
Revision as of 12:29, 20 March 2008
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| , resolution 2.01Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , , , and | ||||||
| Activity: | Alpha-amylase, with EC number 3.2.1.1 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure of the pig pancreatic a-amylase complexed with malto-oligosaccharides
Overview
The structural X-ray map of a pig pancreatic alpha-amylase crystal soaked (and flash-frozen) with a maltopentaose substrate showed a pattern of electron density corresponding to the binding of oligosaccharides at the active site and at three surface binding sites. The electron density region observed at the active site, filling subsites-3 through-1, was interpreted in terms of the process of enzyme-catalyzed hydrolysis undergone by maltopentaose. Because the expected conformational changes in the "flexible loop" that constitutes the surface edge of the active site were not observed, the movement of the loop may depend on aglycone site being filled. The crystal structure was refined at 2.01 A resolution to an R factor of 17.0% ( R(free) factor of 19.8%). The final model consists of 3910 protein atoms, one calcium ion, two chloride ions, 103 oligosaccharide atoms, 761 atoms of water molecules, and 23 ethylene glycol atoms.
About this Structure
1UA3 is a Single protein structure of sequence from Sus scrofa. Full crystallographic information is available from OCA.
Reference
Crystal structure of the pig pancreatic alpha-amylase complexed with malto-oligosaccharides., Payan F, Qian M, J Protein Chem. 2003 Apr;22(3):275-84. PMID:12962327
Page seeded by OCA on Thu Mar 20 14:29:22 2008
Categories: Alpha-amylase | Single protein | Sus scrofa | Payan, F. | Qian, M. | CA | CL | EDO | GLC | MAL | MLR | Beta-alpha-barrel
