1i75: Difference between revisions
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[[Image:1i75.jpg|left|200px]] | [[Image:1i75.jpg|left|200px]] | ||
'''CRYSTAL STRUCTURE OF CYCLODEXTRIN GLUCANOTRANSFERASE FROM ALKALOPHILIC BACILLUS SP.#1011 COMPLEXED WITH 1-DEOXYNOJIRIMYCIN''' | {{Structure | ||
|PDB= 1i75 |SIZE=350|CAPTION= <scene name='initialview01'>1i75</scene>, resolution 2.0Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene> and <scene name='pdbligand=NOJ:1-DEOXYNOJIRIMYCIN'>NOJ</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Cyclomaltodextrin_glucanotransferase Cyclomaltodextrin glucanotransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.1.19 2.4.1.19] | |||
|GENE= BACCGTA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1409 Bacillus sp.]) | |||
}} | |||
'''CRYSTAL STRUCTURE OF CYCLODEXTRIN GLUCANOTRANSFERASE FROM ALKALOPHILIC BACILLUS SP.#1011 COMPLEXED WITH 1-DEOXYNOJIRIMYCIN''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1I75 is a [ | 1I75 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Bacillus_sp. Bacillus sp.]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1I75 OCA]. | ||
==Reference== | ==Reference== | ||
Crystal structure of cyclodextrin glucanotransferase from alkalophilic Bacillus sp. 1011 complexed with 1-deoxynojirimycin at 2.0 A resolution., Kanai R, Haga K, Yamane K, Harata K, J Biochem. 2001 Apr;129(4):593-8. PMID:[http:// | Crystal structure of cyclodextrin glucanotransferase from alkalophilic Bacillus sp. 1011 complexed with 1-deoxynojirimycin at 2.0 A resolution., Kanai R, Haga K, Yamane K, Harata K, J Biochem. 2001 Apr;129(4):593-8. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11275559 11275559] | ||
[[Category: Bacillus sp.]] | [[Category: Bacillus sp.]] | ||
[[Category: Cyclomaltodextrin glucanotransferase]] | [[Category: Cyclomaltodextrin glucanotransferase]] | ||
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[[Category: protein-inhibitor complex]] | [[Category: protein-inhibitor complex]] | ||
''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 11:46:32 2008'' | ||
Revision as of 12:46, 20 March 2008
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| , resolution 2.0Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | and | ||||||
| Gene: | BACCGTA (Bacillus sp.) | ||||||
| Activity: | Cyclomaltodextrin glucanotransferase, with EC number 2.4.1.19 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF CYCLODEXTRIN GLUCANOTRANSFERASE FROM ALKALOPHILIC BACILLUS SP.#1011 COMPLEXED WITH 1-DEOXYNOJIRIMYCIN
OverviewOverview
1-Deoxynojirimycin, a pseudo-monosaccharide, is a strong inhibitor of glucoamylase but a relatively weak inhibitor of cyclodextrin glucanotransferase (CGTase). To elucidate this difference, the crystal structure of the CGTase from alkalophilic Bacillus sp. 1011 complexed with 1-deoxynojirimycin was determined at 2.0 A resolution with the crystallographic R value of 0.154 (R(free) = 0.214). The asymmetric unit of the crystal contains two CGTase molecules and each molecule binds two 1-deoxynojirimycins. One 1-deoxynojirimycin molecule is bound to the active center by hydrogen bonds with catalytic residues and water molecules, but its binding mode differs from that expected in the substrate binding. Another 1-deoxynojirimycin found at the maltose-binding site 1 is bound to Asn-667 with a hydrogen bond and by stacking interaction with the indole moiety of Trp-662 of molecule 1 or Trp-616 of molecule 2. Comparison of this structure with that of the acarbose-CGTase complex suggested that the lack of stacking interaction with the aromatic side chain of Tyr-100 is responsible for the weak inhibition by 1-deoxynojirimycin of the enzymatic action of CGTase.
About this StructureAbout this Structure
1I75 is a Single protein structure of sequence from Bacillus sp.. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structure of cyclodextrin glucanotransferase from alkalophilic Bacillus sp. 1011 complexed with 1-deoxynojirimycin at 2.0 A resolution., Kanai R, Haga K, Yamane K, Harata K, J Biochem. 2001 Apr;129(4):593-8. PMID:11275559
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