1qi3: Difference between revisions
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1qi3]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Pseudomonas_stutzeri Pseudomonas stutzeri]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QI3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1QI3 FirstGlance]. <br> | <table><tr><td colspan='2'>[[1qi3]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Pseudomonas_stutzeri Pseudomonas stutzeri]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QI3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1QI3 FirstGlance]. <br> | ||
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MTT:MALTOTETRAOSE'>MTT</scene>< | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MTT:MALTOTETRAOSE'>MTT</scene></td></tr> | ||
<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Glucan_1,4-alpha-maltotetraohydrolase Glucan 1,4-alpha-maltotetraohydrolase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.60 3.2.1.60] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Glucan_1,4-alpha-maltotetraohydrolase Glucan 1,4-alpha-maltotetraohydrolase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.60 3.2.1.60] </span></td></tr> | ||
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1qi3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qi3 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1qi3 RCSB], [http://www.ebi.ac.uk/pdbsum/1qi3 PDBsum]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1qi3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qi3 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1qi3 RCSB], [http://www.ebi.ac.uk/pdbsum/1qi3 PDBsum]</span></td></tr> | ||
<table> | </table> | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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[[Category: Glucan 1,4-alpha-maltotetraohydrolase]] | [[Category: Glucan 1,4-alpha-maltotetraohydrolase]] | ||
[[Category: Pseudomonas stutzeri]] | [[Category: Pseudomonas stutzeri]] | ||
[[Category: Hasegawa, K | [[Category: Hasegawa, K]] | ||
[[Category: Kubota, M | [[Category: Kubota, M]] | ||
[[Category: Matsuura, Y | [[Category: Matsuura, Y]] | ||
[[Category: Hydrolase]] | [[Category: Hydrolase]] | ||
[[Category: Maltotetraose-forming exo amylase]] | [[Category: Maltotetraose-forming exo amylase]] | ||
Revision as of 10:57, 6 January 2015
MUTANT (D193N) MALTOTETRAOSE-FORMING EXO-AMYLASE IN COMPLEX WITH MALTOTETRAOSEMUTANT (D193N) MALTOTETRAOSE-FORMING EXO-AMYLASE IN COMPLEX WITH MALTOTETRAOSE
Structural highlights
Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe crystal structures of the four product-complexed single mutants of the catalytic residues of Pseudomonas stutzeri maltotetraose-forming alpha-amylase, E219G, D193N, D193G and D294N, have been determined. Possible roles of the catalytic residues Glu219, Asp193 and Asp294 have been discussed by comparing the structures among the previously determined complexed mutant E219Q and the present mutant enzymes. The results suggested that Asp193 predominantly works as the base catalyst (nucleophile), whose side chain atom lies in close proximity to the C1-atom of Glc4, being involved in the intermediate formation in the hydrolysis reaction. While Asp294 works for tightly binding the substrate to give a twisted and a deformed conformation of the glucose ring at position -1 (Glc4). The hydrogen bond between the side chain atom of Glu219 and the O1-atom of Glc4, that implies the possibility of interaction via hydrogen, consistently present throughout these analyses, supports the generally accepted role of this residue as the acid catalyst (proton donor). Roles of catalytic residues in alpha-amylases as evidenced by the structures of the product-complexed mutants of a maltotetraose-forming amylase.,Hasegawa K, Kubota M, Matsuura Y Protein Eng. 1999 Oct;12(10):819-24. PMID:10556241[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References |
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