1b90
From Proteopedia
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| - | [[Image:1b90.gif|left|200px]] | + | [[Image:1b90.gif|left|200px]] |
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| - | '''BACILLUS CEREUS BETA-AMYLASE APO FORM''' | + | {{Structure |
| + | |PDB= 1b90 |SIZE=350|CAPTION= <scene name='initialview01'>1b90</scene>, resolution 2.5Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene> and <scene name='pdbligand=CA:CALCIUM ION'>CA</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Beta-amylase Beta-amylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.2 3.2.1.2] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''BACILLUS CEREUS BETA-AMYLASE APO FORM''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1B90 is a [ | + | 1B90 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Bacillus_cereus Bacillus cereus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1B90 OCA]. |
==Reference== | ==Reference== | ||
| - | Structure of raw starch-digesting Bacillus cereus beta-amylase complexed with maltose., Mikami B, Adachi M, Kage T, Sarikaya E, Nanmori T, Shinke R, Utsumi S, Biochemistry. 1999 Jun 1;38(22):7050-61. PMID:[http:// | + | Structure of raw starch-digesting Bacillus cereus beta-amylase complexed with maltose., Mikami B, Adachi M, Kage T, Sarikaya E, Nanmori T, Shinke R, Utsumi S, Biochemistry. 1999 Jun 1;38(22):7050-61. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10353816 10353816] |
[[Category: Bacillus cereus]] | [[Category: Bacillus cereus]] | ||
[[Category: Beta-amylase]] | [[Category: Beta-amylase]] | ||
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[[Category: hydrolase(o-glycosyl)]] | [[Category: hydrolase(o-glycosyl)]] | ||
| - | ''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 10:07:52 2008'' |
Revision as of 08:07, 20 March 2008
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| , resolution 2.5Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , and | ||||||
| Activity: | Beta-amylase, with EC number 3.2.1.2 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
BACILLUS CEREUS BETA-AMYLASE APO FORM
Overview
The crystals of beta-amylase from Bacillus cereus belong to space group P21 with the following cell dimensions: a = 57.70 A, b = 92.87 A, c = 65.93 A, and beta =101.95 degrees. The structures of free and maltose-bound beta-amylases were determined by X-ray crystallography at 2.1 and 2.5 A with R-factors of 0.170 and 0.164, respectively. The final model of the maltose-bound form comprises 516 amino acid residues, four maltose molecules, 275 water molecules, one Ca2+, one acetate, and one sulfate ion. The enzyme consists of a core (beta/alpha)8-barrel domain (residues 5-434) and a C-terminal starch-binding domain (residues 435-613). Besides the active site in the core where two maltose molecules are bound in tandem, two novel maltose-binding sites were found in the core L4 region and in the C-terminal domain. The structure of the core domain is similar to that of soybean beta-amylase except for the L4 maltose-binding site, whereas the C-terminal domain has the same secondary structure as domain E of cyclodextrin glucosyltransferase. These two maltose-binding sites are 32-36 A apart from the active site. These results indicate that the ability of B. cereus beta-amylase to digest raw starch can be attributed to the additional two maltose-binding sites.
About this Structure
1B90 is a Single protein structure of sequence from Bacillus cereus. Full crystallographic information is available from OCA.
Reference
Structure of raw starch-digesting Bacillus cereus beta-amylase complexed with maltose., Mikami B, Adachi M, Kage T, Sarikaya E, Nanmori T, Shinke R, Utsumi S, Biochemistry. 1999 Jun 1;38(22):7050-61. PMID:10353816
Page seeded by OCA on Thu Mar 20 10:07:52 2008
Categories: Bacillus cereus | Beta-amylase | Single protein | Adachi, M. | Kage, T. | Mikami, B. | Nanmori, T. | Sarikaya, E. | Shinke, R. | Utsumi, S. | ACT | CA | SO4 | Hydrolase(o-glycosyl)
