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The taxonomic range for the selected organisms is: Thermoanaerobacterium thermosulfurigenes
The expected taxonomic range for this enzyme is: Bacteria, Archaea, Eukaryota
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4,6-O-ethylidene-4-nitrophenyl-alpha-D-maltoheptaoside + maltose
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maltose as donor and acceptor, overview
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soluble starch + glycosyl acceptor
alpha-cyclodextrin + beta cyclodextrin + gamma-cyclodextrin
soluble starch + glycosyl acceptor
beta-cyclodextrin
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soluble starch + glycosyl acceptor
cyclodextrins
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starch + glycosyl acceptor
cyclodextrin
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the cyclodextrin product specificity can be changed into linear product specificity, by introducing a five-residue insertion mutation at the donor substrate binding subsites. The CGTase mutants remain clearly different from the maltogenic alpha-amylase, as they have much lower hydrolytic activities, they form linear products of variable sizes and they retain a low cyclodextrin forming activity, whereas maltogenic alpha-amylases produce primarily maltose. The five-residue insertion, concomitantly, strongly enhances the exo-specificity of CGTase
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additional information
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soluble starch + glycosyl acceptor
alpha-cyclodextrin + beta cyclodextrin + gamma-cyclodextrin
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soluble starch + glycosyl acceptor
alpha-cyclodextrin + beta cyclodextrin + gamma-cyclodextrin
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product ratios 43% alpha-cyclodextrin, 46% beta-cyclodextrin and 11% gamma-cyclodextrin
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additional information
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the enzyme primarily catalyses the formation of cyclic alpha-1,4-linked cyclodextrins from starch. This enzyme also possesses unusually high hydrolytic activity as a side reaction, thought to be due to partial retention of ancestral enzyme function. Product formation, alpha-, beta-, and gamma-cyclodextrins, of wild-type and mutant enzymes, substrate-binding subsites of CGTase, and sugar binding structure, overview
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additional information
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CGTases produce a mixture of cyclodextrins from starch consisting of 6 alpha, 7 beta, or 8 gamma glucose units, specificity, overview
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additional information
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cyclodextrin glucanotransferases produce a mixture of cyclic alpha-(1,4)-linked oligosaccharides, cyclodextrins, from starch. The enzyme from Thermoanaerobacterium thermosulfurigenes produces alpha- and beta-cyclodextrins
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additional information
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reaction mechanism, a linear glucan chain binds to the substrate binding subsites of CGTase followed by bond cleavage to yield a covalent glycosyl-enzyme intermediate. The nature of the acceptor molecule in the second step of the reaction, to which the covalently bound oligosaccharide is transferred, determines the enzyme reaction specificity, schematic overview. The enzyme also shows high hydrolytic activity on potato starch
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additional information
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substrates bind across the enzyme surface in a long groove formed by the domains A and B that can accommodate at least 7 glucose residues at the donor subsites and 3 at the acceptor subsites. Cyclodextrin glucanotransferases cleave the alpha-1,4-glycosidic bonds between the subsites -1 and +1 in alpha-glucans yielding a stable covalent glycosyl-intermediate bound at the donor subsites. The glycosyl-intermediate is then transferred to the 4-hydroxyl of its own non-reducing end forming a new alpha-1,4-glycosidic bond to yield a cyclic product
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Tonkova, A.
Bacterial cyclodextrin glucanotransferase
Enzyme Microb. Technol.
22
678-686
1998
Bacillus cereus, Bacillus cereus NCIMB 13123, Bacillus licheniformis, Bacillus ohbensis, Bacillus sp. (in: Bacteria), Bacillus sp. (in: Bacteria) 1011, Bacillus sp. (in: Bacteria) AL-6, Bacillus sp. (in: Bacteria) INMIA 1919, Bacillus sp. (in: Bacteria) INMIA A7/1, Bacillus sp. (in: Bacteria) INMIA T4, Bacillus sp. (in: Bacteria) INMIA t6, Geobacillus stearothermophilus, Geobacillus stearothermophilus N2, Klebsiella oxytoca, Klebsiella pneumoniae, Lederbergia lentus, Lysinibacillus sphaericus, Lysinibacillus sphaericus ATCC 7055, Micrococcus luteus, Niallia circulans, Niallia circulans 8, Paenibacillus macerans, Paenibacillus macerans IAM1243, Priestia megaterium, Priestia megaterium No5, Salimicrobium halophilum, Salimicrobium halophilum INMIA-3849, Thermoanaerobacterium thermosulfurigenes, Thermoanaerobacterium thermosulfurigenes EM1, Weizmannia coagulans
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brenda
Tachibana, Y.; Kuramura, A.; Shirasaka, N.; Suzuki, Y.; Yamamoto, T.; Fujiwara, S.; Takagi, M.; Imanaka, T.
Purification and characterization of an extremely thermostable cyclomaltodextrin glucanotransferase from a newly isolated hyperthermophilic archaeon, a Thermococcus sp
Appl. Environ. Microbiol.
65
1991-1997
1999
Bacillus licheniformis (P14014), Bacillus sp. (in: Bacteria), Bacillus sp. (in: Bacteria) (P31746), Bacillus sp. (in: Bacteria) 1011, Brevibacterium sp., Brevibacterium sp. 9605, Geobacillus stearothermophilus, Geobacillus stearothermophilus (P31797), Klebsiella oxytoca, Klebsiella pneumoniae, Paenibacillus macerans, Paenibacillus macerans (P04830), Thermoanaerobacter sp., Thermoanaerobacterium thermosulfurigenes, Thermoanaerobacterium thermosulfurigenes (P26827), Thermococcus sp., Thermococcus sp. B1001
brenda
Yamamoto, T.; Shiraki, K.; Fujiwara, S.; Takagi, M.; Fukui, K.; Imanaka, T.
In vitro heat effect on functional and conformational changes of cyclodextrin glucanotransferase from hyperthermophilic archaea
Biochem. Biophys. Res. Commun.
265
57-61
1999
Geobacillus stearothermophilus, Niallia circulans, Niallia circulans 251, Niallia circulans 8, Thermoanaerobacterium thermosulfurigenes, Thermoanaerobacterium thermosulfurigenes EM1, Thermococcus sp., Thermococcus sp. (Q9UWN2), Thermococcus sp. B1001
brenda
Rashid, N.; Cornista, J.; Ezaki, S.; Fukui, T.; Atomi, H.; Imanaka, T.
Characterization of an archaeal cyclodextrin glucanotransferase with a novel C-terminal domain
J. Bacteriol.
184
777-784
2002
Bacillus sp. (in: Bacteria), Bacillus sp. (in: Bacteria) 1011, Geobacillus stearothermophilus, Geobacillus stearothermophilus (P31797), Klebsiella oxytoca (P08704), Niallia circulans, Niallia circulans (P43379), Niallia circulans 251, Niallia circulans 251 (P43379), Paenibacillus macerans (P31835), Thermoanaerobacterium thermosulfurigenes, Thermoanaerobacterium thermosulfurigenes EM1, Thermococcus kodakarensis (Q8X268), Thermococcus sp., Thermococcus sp. (Q9UWN2), Thermococcus sp. B1001, Thermococcus sp. B1001 (Q9UWN2)
brenda
Doukyu, N.; Kuwahara, H.; Aono, R.
Isolation of Paenibacillus illinoisensis that produces cyclodextrin glucanotransferase resistant to organic solvents
Biosci. Biotechnol. Biochem.
67
334-340
2003
Niallia circulans, Priestia megaterium, Salimicrobium halophilum, Paenibacillus macerans, Bacillus ohbensis, Bacillus sp. (in: Bacteria), Brevibacterium sp., Thermoanaerobacterium thermosulfurigenes, Paenibacillus illinoisensis, Paenibacillus illinoisensis ST-12K, Brevibacterium sp. 9605, Bacillus sp. (in: Bacteria) BE101, Niallia circulans 251
brenda
Leemhuis, H.; Kragh, K.M.; Dijkstra, B.W.; Dijkhuizen, L.
Engineering cyclodextrin glycosyltransferase into a starch hydrolase with a high exo-specificity
J. Biotechnol.
103
203-212
2003
Thermoanaerobacterium thermosulfurigenes
brenda
Qi, Q.; Zimmermann, W.
Cyclodextrin glucanotransferase: from gene to applications
Appl. Microbiol. Biotechnol.
66
475-485
2005
Bacillus licheniformis (P14014), Bacillus ohbensis (P27036), Bacillus sp. (in: Bacteria) (O82984), Bacillus sp. (in: Bacteria) (P05618), Bacillus sp. (in: Bacteria) (P17692), Bacillus sp. (in: Bacteria) (P30921), Bacillus sp. (in: Bacteria) (P31747), Bacillus sp. (in: Bacteria) (Q59239), Bacillus sp. (in: Bacteria) 1011 (P05618), Bacillus sp. (in: Bacteria) 1018 (P17692), Bacillus sp. (in: Bacteria) 17.1 (P30921), Bacillus sp. (in: Bacteria) 38-2 (P30921), Bacillus sp. (in: Bacteria) 6.6.3 (P31747), Bacillus sp. (in: Bacteria) A2-5a (O82984), Bacillus sp. (in: Bacteria) KC201 (Q59239), Brevibacillus brevis (O30565), Brevibacillus brevis CD162 (O30565), Cytobacillus firmus, Cytobacillus firmus 290-3, Evansella clarkii (Q8L3E0), Evansella clarkii 7384 (Q8L3E0), Geobacillus stearothermophilus (P31797), Klebsiella oxytoca (P08704), Klebsiella oxytoca M5a1 (P08704), Niallia circulans (P30920), Niallia circulans (P43379), Niallia circulans (Q9F5W3), Niallia circulans 251 (P43379), Niallia circulans 8 (P30920), Niallia circulans A11 (Q9F5W3), Nostoc sp. (Q8RMG0), Nostoc sp. 9229 (Q8RMG0), Paenibacillus macerans (P31835), Salipaludibacillus agaradhaerens, Salipaludibacillus agaradhaerens (Q7X3T0), Salipaludibacillus agaradhaerens DSM 8721 (Q7X3T0), Salipaludibacillus agaradhaerens DSM 9948, Salipaludibacillus agaradhaerens LS-3C, Streptococcus pyogenes, Thermoanaerobacter sp., Thermoanaerobacterium thermosulfurigenes (P26827), Thermococcus kodakarensis (Q8X268), Thermococcus sp. (Q9UWN2), Thermococcus sp. B1001 (Q9UWN2), Xanthomonas axonopodis, Xanthomonas campestris
brenda
Kelly, R.M.; Leemhuis, H.; Rozeboom, H.J.; van Oosterwijk, N.; Dijkstra, B.W.; Dijkhuizen, L.
Elimination of competing hydrolysis and coupling side reactions of a cyclodextrin glucanotransferase by directed evolution
Biochem. J.
413
517-525
2008
Thermoanaerobacterium thermosulfurigenes, Thermoanaerobacterium thermosulfurigenes EM1
brenda
Kelly, R.M.; Dijkhuizen, L.; Leemhuis, H.
The evolution of cyclodextrin glucanotransferase product specificity
Appl. Microbiol. Biotechnol.
84
119-133
2009
Anaerobranca gottschalkii, Bacillus sp. (in: Bacteria) (P05618), Geobacillus stearothermophilus (P31797), Geobacillus stearothermophilus NO2 (P31797), Klebsiella pneumoniae, Klebsiella pneumoniae M5a1, Niallia circulans, Thermoanaerobacter sp., Thermoanaerobacterium thermosulfurigenes, Thermoanaerobacterium thermosulfurigenes EM1, Thermococcus sp., Thermococcus sp. B1001
brenda
Leemhuis, H.; Kelly, R.M.; Dijkhuizen, L.
Engineering of cyclodextrin glucanotransferases and the impact for biotechnological applications
Appl. Microbiol. Biotechnol.
85
823-835
2010
Alkalihalobacillus clausii, Alkalihalobacillus clausii E16, Anaerobranca gottschalkii, Bacillus licheniformis, Bacillus ohbensis, Bacillus sp. (in: Bacteria), Bacillus sp. (in: Bacteria) B1018, Bacillus sp. (in: Bacteria) BL-31, Bacillus sp. (in: Bacteria) G1, Bacillus sp. (in: Bacteria) KC201, Bacillus sp. (in: Bacteria) TS1-1, Brevibacillus brevis, Brevibacillus brevis CD162, Cytobacillus firmus, Evansella clarkii, Evansella clarkii 7384, Geobacillus stearothermophilus, Geobacillus stearothermophilus ET1, Klebsiella pneumoniae, Klebsiella pneumoniae M5a1, Niallia circulans, Paenibacillus campinasensis, Paenibacillus campinasensis H69-3, Paenibacillus graminis, Paenibacillus graminis NC22.13, Paenibacillus illinoisensis, Paenibacillus illinoisensis ST-12 K, Paenibacillus macerans, Paenibacillus pabuli, Paenibacillus pabuli US132, Paenibacillus sp., Priestia megaterium, Salipaludibacillus agaradhaerens, Salipaludibacillus agaradhaerens LS-3C, Thermoanaerobacter sp., Thermoanaerobacterium thermosulfurigenes, Thermoanaerobacterium thermosulfurigenes EM1
brenda