Truncation of domain V of the multidomain glucansucrase GTF180 of Lactobacillus reuteri 180 heavily impairs its polysaccharide-synthesizing ability
Abstract Glucansucrases are exclusively found in lactic acid bacteria and synthesize a variety of α-glucans from sucrose. They are large multidomain enzymes belonging to the CAZy family 70 of glycoside hydrolase enzymes (GH70). The crystal structure of the N-terminal truncated GTF180 of Lactobacillu...
Ausführliche Beschreibung
Autor*in: |
Meng, Xiangfeng [verfasserIn] |
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Artikel |
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Sprache: |
Englisch |
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2015 |
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Anmerkung: |
© Springer-Verlag Berlin Heidelberg 2015 |
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Übergeordnetes Werk: |
Enthalten in: Applied microbiology and biotechnology - Springer Berlin Heidelberg, 1984, 99(2015), 14 vom: 15. Jan., Seite 5885-5894 |
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Übergeordnetes Werk: |
volume:99 ; year:2015 ; number:14 ; day:15 ; month:01 ; pages:5885-5894 |
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DOI / URN: |
10.1007/s00253-014-6361-8 |
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Katalog-ID: |
OLC2050768974 |
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520 | |a Abstract Glucansucrases are exclusively found in lactic acid bacteria and synthesize a variety of α-glucans from sucrose. They are large multidomain enzymes belonging to the CAZy family 70 of glycoside hydrolase enzymes (GH70). The crystal structure of the N-terminal truncated GTF180 of Lactobacillus reuteri 180 (GTF180-ΔN) revealed that the polypeptide chain follows a U shape course to form five domains, including domains A, B, and C, which resemble those of family GH13 enzymes, and two extra and novel domains (domains IV and V), which are attached to the catalytic core. To elucidate the functional roles of domain V, we have deleted the domain V fragments from both the N- and C-terminal ends (GTF180-ΔNΔV). Truncation of domain V of GTF180-ΔN yielded a catalytically fully active enzyme but with heavily impaired polysaccharide synthesis ability. Instead, GTF180-ΔNΔV produced a large amount of oligosaccharides. Domain V is not involved in determining the linkage specificity, and the size of polysaccharide produced as the polysaccharide produced by GTF180-ΔNΔV was identical in size and structure with that of GTF180-ΔN. The data indicates that GTF180-ΔNΔV acts nonprocessively, frequently initiating synthesis of a new oligosaccharide from sucrose, instead of continuing the synthesis of a full size polysaccharide. Mutations L940E and L940F in GTF180-ΔNΔV, which are involved in the acceptor substrate binding, restored polysaccharide synthesis almost to the level of GTF180-ΔN. These results demonstrated that interactions of growing glucan chains with both domain V and acceptor substrate binding sites are important for polysaccharide synthesis. | ||
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700 | 1 | |a Dijkhuizen, Lubbert |4 aut | |
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10.1007/s00253-014-6361-8 doi (DE-627)OLC2050768974 (DE-He213)s00253-014-6361-8-p DE-627 ger DE-627 rakwb eng 570 VZ 12 ssgn BIODIV DE-30 fid Meng, Xiangfeng verfasserin aut Truncation of domain V of the multidomain glucansucrase GTF180 of Lactobacillus reuteri 180 heavily impairs its polysaccharide-synthesizing ability 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2015 Abstract Glucansucrases are exclusively found in lactic acid bacteria and synthesize a variety of α-glucans from sucrose. They are large multidomain enzymes belonging to the CAZy family 70 of glycoside hydrolase enzymes (GH70). The crystal structure of the N-terminal truncated GTF180 of Lactobacillus reuteri 180 (GTF180-ΔN) revealed that the polypeptide chain follows a U shape course to form five domains, including domains A, B, and C, which resemble those of family GH13 enzymes, and two extra and novel domains (domains IV and V), which are attached to the catalytic core. To elucidate the functional roles of domain V, we have deleted the domain V fragments from both the N- and C-terminal ends (GTF180-ΔNΔV). Truncation of domain V of GTF180-ΔN yielded a catalytically fully active enzyme but with heavily impaired polysaccharide synthesis ability. Instead, GTF180-ΔNΔV produced a large amount of oligosaccharides. Domain V is not involved in determining the linkage specificity, and the size of polysaccharide produced as the polysaccharide produced by GTF180-ΔNΔV was identical in size and structure with that of GTF180-ΔN. The data indicates that GTF180-ΔNΔV acts nonprocessively, frequently initiating synthesis of a new oligosaccharide from sucrose, instead of continuing the synthesis of a full size polysaccharide. Mutations L940E and L940F in GTF180-ΔNΔV, which are involved in the acceptor substrate binding, restored polysaccharide synthesis almost to the level of GTF180-ΔN. These results demonstrated that interactions of growing glucan chains with both domain V and acceptor substrate binding sites are important for polysaccharide synthesis. Glucansucrase Glucan GTF180 Oligosaccharide Polysaccharide Dobruchowska, Justyna M. aut Pijning, Tjaard aut Gerwig, Gerrit J. aut Kamerling, Johannis P. aut Dijkhuizen, Lubbert aut Enthalten in Applied microbiology and biotechnology Springer Berlin Heidelberg, 1984 99(2015), 14 vom: 15. Jan., Seite 5885-5894 (DE-627)129942634 (DE-600)392453-1 (DE-576)015507750 0175-7598 nnns volume:99 year:2015 number:14 day:15 month:01 pages:5885-5894 https://doi.org/10.1007/s00253-014-6361-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_130 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4082 GBV_ILN_4277 GBV_ILN_4305 AR 99 2015 14 15 01 5885-5894 |
spelling |
10.1007/s00253-014-6361-8 doi (DE-627)OLC2050768974 (DE-He213)s00253-014-6361-8-p DE-627 ger DE-627 rakwb eng 570 VZ 12 ssgn BIODIV DE-30 fid Meng, Xiangfeng verfasserin aut Truncation of domain V of the multidomain glucansucrase GTF180 of Lactobacillus reuteri 180 heavily impairs its polysaccharide-synthesizing ability 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2015 Abstract Glucansucrases are exclusively found in lactic acid bacteria and synthesize a variety of α-glucans from sucrose. They are large multidomain enzymes belonging to the CAZy family 70 of glycoside hydrolase enzymes (GH70). The crystal structure of the N-terminal truncated GTF180 of Lactobacillus reuteri 180 (GTF180-ΔN) revealed that the polypeptide chain follows a U shape course to form five domains, including domains A, B, and C, which resemble those of family GH13 enzymes, and two extra and novel domains (domains IV and V), which are attached to the catalytic core. To elucidate the functional roles of domain V, we have deleted the domain V fragments from both the N- and C-terminal ends (GTF180-ΔNΔV). Truncation of domain V of GTF180-ΔN yielded a catalytically fully active enzyme but with heavily impaired polysaccharide synthesis ability. Instead, GTF180-ΔNΔV produced a large amount of oligosaccharides. Domain V is not involved in determining the linkage specificity, and the size of polysaccharide produced as the polysaccharide produced by GTF180-ΔNΔV was identical in size and structure with that of GTF180-ΔN. The data indicates that GTF180-ΔNΔV acts nonprocessively, frequently initiating synthesis of a new oligosaccharide from sucrose, instead of continuing the synthesis of a full size polysaccharide. Mutations L940E and L940F in GTF180-ΔNΔV, which are involved in the acceptor substrate binding, restored polysaccharide synthesis almost to the level of GTF180-ΔN. These results demonstrated that interactions of growing glucan chains with both domain V and acceptor substrate binding sites are important for polysaccharide synthesis. Glucansucrase Glucan GTF180 Oligosaccharide Polysaccharide Dobruchowska, Justyna M. aut Pijning, Tjaard aut Gerwig, Gerrit J. aut Kamerling, Johannis P. aut Dijkhuizen, Lubbert aut Enthalten in Applied microbiology and biotechnology Springer Berlin Heidelberg, 1984 99(2015), 14 vom: 15. Jan., Seite 5885-5894 (DE-627)129942634 (DE-600)392453-1 (DE-576)015507750 0175-7598 nnns volume:99 year:2015 number:14 day:15 month:01 pages:5885-5894 https://doi.org/10.1007/s00253-014-6361-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_130 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4082 GBV_ILN_4277 GBV_ILN_4305 AR 99 2015 14 15 01 5885-5894 |
allfields_unstemmed |
10.1007/s00253-014-6361-8 doi (DE-627)OLC2050768974 (DE-He213)s00253-014-6361-8-p DE-627 ger DE-627 rakwb eng 570 VZ 12 ssgn BIODIV DE-30 fid Meng, Xiangfeng verfasserin aut Truncation of domain V of the multidomain glucansucrase GTF180 of Lactobacillus reuteri 180 heavily impairs its polysaccharide-synthesizing ability 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2015 Abstract Glucansucrases are exclusively found in lactic acid bacteria and synthesize a variety of α-glucans from sucrose. They are large multidomain enzymes belonging to the CAZy family 70 of glycoside hydrolase enzymes (GH70). The crystal structure of the N-terminal truncated GTF180 of Lactobacillus reuteri 180 (GTF180-ΔN) revealed that the polypeptide chain follows a U shape course to form five domains, including domains A, B, and C, which resemble those of family GH13 enzymes, and two extra and novel domains (domains IV and V), which are attached to the catalytic core. To elucidate the functional roles of domain V, we have deleted the domain V fragments from both the N- and C-terminal ends (GTF180-ΔNΔV). Truncation of domain V of GTF180-ΔN yielded a catalytically fully active enzyme but with heavily impaired polysaccharide synthesis ability. Instead, GTF180-ΔNΔV produced a large amount of oligosaccharides. Domain V is not involved in determining the linkage specificity, and the size of polysaccharide produced as the polysaccharide produced by GTF180-ΔNΔV was identical in size and structure with that of GTF180-ΔN. The data indicates that GTF180-ΔNΔV acts nonprocessively, frequently initiating synthesis of a new oligosaccharide from sucrose, instead of continuing the synthesis of a full size polysaccharide. Mutations L940E and L940F in GTF180-ΔNΔV, which are involved in the acceptor substrate binding, restored polysaccharide synthesis almost to the level of GTF180-ΔN. These results demonstrated that interactions of growing glucan chains with both domain V and acceptor substrate binding sites are important for polysaccharide synthesis. Glucansucrase Glucan GTF180 Oligosaccharide Polysaccharide Dobruchowska, Justyna M. aut Pijning, Tjaard aut Gerwig, Gerrit J. aut Kamerling, Johannis P. aut Dijkhuizen, Lubbert aut Enthalten in Applied microbiology and biotechnology Springer Berlin Heidelberg, 1984 99(2015), 14 vom: 15. Jan., Seite 5885-5894 (DE-627)129942634 (DE-600)392453-1 (DE-576)015507750 0175-7598 nnns volume:99 year:2015 number:14 day:15 month:01 pages:5885-5894 https://doi.org/10.1007/s00253-014-6361-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_130 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4082 GBV_ILN_4277 GBV_ILN_4305 AR 99 2015 14 15 01 5885-5894 |
allfieldsGer |
10.1007/s00253-014-6361-8 doi (DE-627)OLC2050768974 (DE-He213)s00253-014-6361-8-p DE-627 ger DE-627 rakwb eng 570 VZ 12 ssgn BIODIV DE-30 fid Meng, Xiangfeng verfasserin aut Truncation of domain V of the multidomain glucansucrase GTF180 of Lactobacillus reuteri 180 heavily impairs its polysaccharide-synthesizing ability 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2015 Abstract Glucansucrases are exclusively found in lactic acid bacteria and synthesize a variety of α-glucans from sucrose. They are large multidomain enzymes belonging to the CAZy family 70 of glycoside hydrolase enzymes (GH70). The crystal structure of the N-terminal truncated GTF180 of Lactobacillus reuteri 180 (GTF180-ΔN) revealed that the polypeptide chain follows a U shape course to form five domains, including domains A, B, and C, which resemble those of family GH13 enzymes, and two extra and novel domains (domains IV and V), which are attached to the catalytic core. To elucidate the functional roles of domain V, we have deleted the domain V fragments from both the N- and C-terminal ends (GTF180-ΔNΔV). Truncation of domain V of GTF180-ΔN yielded a catalytically fully active enzyme but with heavily impaired polysaccharide synthesis ability. Instead, GTF180-ΔNΔV produced a large amount of oligosaccharides. Domain V is not involved in determining the linkage specificity, and the size of polysaccharide produced as the polysaccharide produced by GTF180-ΔNΔV was identical in size and structure with that of GTF180-ΔN. The data indicates that GTF180-ΔNΔV acts nonprocessively, frequently initiating synthesis of a new oligosaccharide from sucrose, instead of continuing the synthesis of a full size polysaccharide. Mutations L940E and L940F in GTF180-ΔNΔV, which are involved in the acceptor substrate binding, restored polysaccharide synthesis almost to the level of GTF180-ΔN. These results demonstrated that interactions of growing glucan chains with both domain V and acceptor substrate binding sites are important for polysaccharide synthesis. Glucansucrase Glucan GTF180 Oligosaccharide Polysaccharide Dobruchowska, Justyna M. aut Pijning, Tjaard aut Gerwig, Gerrit J. aut Kamerling, Johannis P. aut Dijkhuizen, Lubbert aut Enthalten in Applied microbiology and biotechnology Springer Berlin Heidelberg, 1984 99(2015), 14 vom: 15. Jan., Seite 5885-5894 (DE-627)129942634 (DE-600)392453-1 (DE-576)015507750 0175-7598 nnns volume:99 year:2015 number:14 day:15 month:01 pages:5885-5894 https://doi.org/10.1007/s00253-014-6361-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_130 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4082 GBV_ILN_4277 GBV_ILN_4305 AR 99 2015 14 15 01 5885-5894 |
allfieldsSound |
10.1007/s00253-014-6361-8 doi (DE-627)OLC2050768974 (DE-He213)s00253-014-6361-8-p DE-627 ger DE-627 rakwb eng 570 VZ 12 ssgn BIODIV DE-30 fid Meng, Xiangfeng verfasserin aut Truncation of domain V of the multidomain glucansucrase GTF180 of Lactobacillus reuteri 180 heavily impairs its polysaccharide-synthesizing ability 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag Berlin Heidelberg 2015 Abstract Glucansucrases are exclusively found in lactic acid bacteria and synthesize a variety of α-glucans from sucrose. They are large multidomain enzymes belonging to the CAZy family 70 of glycoside hydrolase enzymes (GH70). The crystal structure of the N-terminal truncated GTF180 of Lactobacillus reuteri 180 (GTF180-ΔN) revealed that the polypeptide chain follows a U shape course to form five domains, including domains A, B, and C, which resemble those of family GH13 enzymes, and two extra and novel domains (domains IV and V), which are attached to the catalytic core. To elucidate the functional roles of domain V, we have deleted the domain V fragments from both the N- and C-terminal ends (GTF180-ΔNΔV). Truncation of domain V of GTF180-ΔN yielded a catalytically fully active enzyme but with heavily impaired polysaccharide synthesis ability. Instead, GTF180-ΔNΔV produced a large amount of oligosaccharides. Domain V is not involved in determining the linkage specificity, and the size of polysaccharide produced as the polysaccharide produced by GTF180-ΔNΔV was identical in size and structure with that of GTF180-ΔN. The data indicates that GTF180-ΔNΔV acts nonprocessively, frequently initiating synthesis of a new oligosaccharide from sucrose, instead of continuing the synthesis of a full size polysaccharide. Mutations L940E and L940F in GTF180-ΔNΔV, which are involved in the acceptor substrate binding, restored polysaccharide synthesis almost to the level of GTF180-ΔN. These results demonstrated that interactions of growing glucan chains with both domain V and acceptor substrate binding sites are important for polysaccharide synthesis. Glucansucrase Glucan GTF180 Oligosaccharide Polysaccharide Dobruchowska, Justyna M. aut Pijning, Tjaard aut Gerwig, Gerrit J. aut Kamerling, Johannis P. aut Dijkhuizen, Lubbert aut Enthalten in Applied microbiology and biotechnology Springer Berlin Heidelberg, 1984 99(2015), 14 vom: 15. Jan., Seite 5885-5894 (DE-627)129942634 (DE-600)392453-1 (DE-576)015507750 0175-7598 nnns volume:99 year:2015 number:14 day:15 month:01 pages:5885-5894 https://doi.org/10.1007/s00253-014-6361-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_130 GBV_ILN_267 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4082 GBV_ILN_4277 GBV_ILN_4305 AR 99 2015 14 15 01 5885-5894 |
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Enthalten in Applied microbiology and biotechnology 99(2015), 14 vom: 15. Jan., Seite 5885-5894 volume:99 year:2015 number:14 day:15 month:01 pages:5885-5894 |
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Enthalten in Applied microbiology and biotechnology 99(2015), 14 vom: 15. Jan., Seite 5885-5894 volume:99 year:2015 number:14 day:15 month:01 pages:5885-5894 |
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Meng, Xiangfeng |
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Meng, Xiangfeng ddc 570 ssgn 12 fid BIODIV misc Glucansucrase misc Glucan misc GTF180 misc Oligosaccharide misc Polysaccharide Truncation of domain V of the multidomain glucansucrase GTF180 of Lactobacillus reuteri 180 heavily impairs its polysaccharide-synthesizing ability |
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570 VZ 12 ssgn BIODIV DE-30 fid Truncation of domain V of the multidomain glucansucrase GTF180 of Lactobacillus reuteri 180 heavily impairs its polysaccharide-synthesizing ability Glucansucrase Glucan GTF180 Oligosaccharide Polysaccharide |
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Truncation of domain V of the multidomain glucansucrase GTF180 of Lactobacillus reuteri 180 heavily impairs its polysaccharide-synthesizing ability |
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Truncation of domain V of the multidomain glucansucrase GTF180 of Lactobacillus reuteri 180 heavily impairs its polysaccharide-synthesizing ability |
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truncation of domain v of the multidomain glucansucrase gtf180 of lactobacillus reuteri 180 heavily impairs its polysaccharide-synthesizing ability |
title_auth |
Truncation of domain V of the multidomain glucansucrase GTF180 of Lactobacillus reuteri 180 heavily impairs its polysaccharide-synthesizing ability |
abstract |
Abstract Glucansucrases are exclusively found in lactic acid bacteria and synthesize a variety of α-glucans from sucrose. They are large multidomain enzymes belonging to the CAZy family 70 of glycoside hydrolase enzymes (GH70). The crystal structure of the N-terminal truncated GTF180 of Lactobacillus reuteri 180 (GTF180-ΔN) revealed that the polypeptide chain follows a U shape course to form five domains, including domains A, B, and C, which resemble those of family GH13 enzymes, and two extra and novel domains (domains IV and V), which are attached to the catalytic core. To elucidate the functional roles of domain V, we have deleted the domain V fragments from both the N- and C-terminal ends (GTF180-ΔNΔV). Truncation of domain V of GTF180-ΔN yielded a catalytically fully active enzyme but with heavily impaired polysaccharide synthesis ability. Instead, GTF180-ΔNΔV produced a large amount of oligosaccharides. Domain V is not involved in determining the linkage specificity, and the size of polysaccharide produced as the polysaccharide produced by GTF180-ΔNΔV was identical in size and structure with that of GTF180-ΔN. The data indicates that GTF180-ΔNΔV acts nonprocessively, frequently initiating synthesis of a new oligosaccharide from sucrose, instead of continuing the synthesis of a full size polysaccharide. Mutations L940E and L940F in GTF180-ΔNΔV, which are involved in the acceptor substrate binding, restored polysaccharide synthesis almost to the level of GTF180-ΔN. These results demonstrated that interactions of growing glucan chains with both domain V and acceptor substrate binding sites are important for polysaccharide synthesis. © Springer-Verlag Berlin Heidelberg 2015 |
abstractGer |
Abstract Glucansucrases are exclusively found in lactic acid bacteria and synthesize a variety of α-glucans from sucrose. They are large multidomain enzymes belonging to the CAZy family 70 of glycoside hydrolase enzymes (GH70). The crystal structure of the N-terminal truncated GTF180 of Lactobacillus reuteri 180 (GTF180-ΔN) revealed that the polypeptide chain follows a U shape course to form five domains, including domains A, B, and C, which resemble those of family GH13 enzymes, and two extra and novel domains (domains IV and V), which are attached to the catalytic core. To elucidate the functional roles of domain V, we have deleted the domain V fragments from both the N- and C-terminal ends (GTF180-ΔNΔV). Truncation of domain V of GTF180-ΔN yielded a catalytically fully active enzyme but with heavily impaired polysaccharide synthesis ability. Instead, GTF180-ΔNΔV produced a large amount of oligosaccharides. Domain V is not involved in determining the linkage specificity, and the size of polysaccharide produced as the polysaccharide produced by GTF180-ΔNΔV was identical in size and structure with that of GTF180-ΔN. The data indicates that GTF180-ΔNΔV acts nonprocessively, frequently initiating synthesis of a new oligosaccharide from sucrose, instead of continuing the synthesis of a full size polysaccharide. Mutations L940E and L940F in GTF180-ΔNΔV, which are involved in the acceptor substrate binding, restored polysaccharide synthesis almost to the level of GTF180-ΔN. These results demonstrated that interactions of growing glucan chains with both domain V and acceptor substrate binding sites are important for polysaccharide synthesis. © Springer-Verlag Berlin Heidelberg 2015 |
abstract_unstemmed |
Abstract Glucansucrases are exclusively found in lactic acid bacteria and synthesize a variety of α-glucans from sucrose. They are large multidomain enzymes belonging to the CAZy family 70 of glycoside hydrolase enzymes (GH70). The crystal structure of the N-terminal truncated GTF180 of Lactobacillus reuteri 180 (GTF180-ΔN) revealed that the polypeptide chain follows a U shape course to form five domains, including domains A, B, and C, which resemble those of family GH13 enzymes, and two extra and novel domains (domains IV and V), which are attached to the catalytic core. To elucidate the functional roles of domain V, we have deleted the domain V fragments from both the N- and C-terminal ends (GTF180-ΔNΔV). Truncation of domain V of GTF180-ΔN yielded a catalytically fully active enzyme but with heavily impaired polysaccharide synthesis ability. Instead, GTF180-ΔNΔV produced a large amount of oligosaccharides. Domain V is not involved in determining the linkage specificity, and the size of polysaccharide produced as the polysaccharide produced by GTF180-ΔNΔV was identical in size and structure with that of GTF180-ΔN. The data indicates that GTF180-ΔNΔV acts nonprocessively, frequently initiating synthesis of a new oligosaccharide from sucrose, instead of continuing the synthesis of a full size polysaccharide. Mutations L940E and L940F in GTF180-ΔNΔV, which are involved in the acceptor substrate binding, restored polysaccharide synthesis almost to the level of GTF180-ΔN. These results demonstrated that interactions of growing glucan chains with both domain V and acceptor substrate binding sites are important for polysaccharide synthesis. © Springer-Verlag Berlin Heidelberg 2015 |
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title_short |
Truncation of domain V of the multidomain glucansucrase GTF180 of Lactobacillus reuteri 180 heavily impairs its polysaccharide-synthesizing ability |
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