Key publications
Harmer NJ, Roy S, Vivoli M (2019). Carbohydrate Kinases: a Conserved Mechanism Across Differing Folds.
Catalysts,
9, 29-29.
Full text.
Phansopa C, Roy S, Rafferty JB, Douglas CWI, Pandhal J, Wright PC, Kelly DJ, Stafford GP (2014). Structural and functional characterization of NanU, a novel high-affinity sialic acid-inducible binding protein of oral and gut-dwelling Bacteroidetes species.
Biochemical Journal,
458(3), 499-511.
Abstract:
Structural and functional characterization of NanU, a novel high-affinity sialic acid-inducible binding protein of oral and gut-dwelling Bacteroidetes species
We biochemically and structurally characterize a novel inducible surface-associated sialic acid-binding protein present in human-dwelling Bacteroidetes species that represents a novel type of sialic acid-specific polysaccharide utilization locus.
Abstract.
Roy S, Phansopa C, Stafford P, Honma K, Douglas CWI, Sharma A, Stafford GP (2012). Beta-hexosaminidase activity of the oral pathogenTannerella forsythiainfluences biofilm formation on glycoprotein substrates. FEMS Immunology & Medical Microbiology, 65(1), 116-120.
Roy S, Honma K, Douglas CWI, Sharma A, Stafford GP (2011). Role of sialidase in glycoprotein utilization by Tannerella forsythia.
Microbiology,
157(11), 3195-3202.
Abstract:
Role of sialidase in glycoprotein utilization by Tannerella forsythia
The major bacterial pathogens associated with periodontitis include Tannerella forsythia. We previously discovered that sialic acid stimulates biofilm growth of T. forsythia, and that sialidase activity is key to utilization of sialoconjugate sugars and is involved in host–pathogen interactions in vitro. The aim of this work was to assess the influence of the NanH sialidase on initial biofilm adhesion and growth in experiments where the only source of sialic acid was sialoglycoproteins or human oral secretions. After showing that T. forsythia can utilize sialoglycoproteins for biofilm growth, we showed that growth and initial adhesion with sialylated mucin and fetuin were inhibited two- to threefold by the sialidase inhibitor oseltamivir. A similar reduction (three- to fourfold) was observed with a nanH mutant compared with the wild-type. Importantly, these data were replicated using clinically relevant serum and saliva samples as substrates. In addition, the ability of the nanH mutant to form biofilms on glycoprotein-coated surfaces could be restored by the addition of purified NanH, which we show is able to cleave sialic acid from the model glycoprotein fetuin and, much less efficiently, 9-O-acetylated bovine submaxillary mucin. These data show for the first time that glycoprotein-associated sialic acid is likely to be a key in vivo nutrient source for T. forsythia when growing in a biofilm, and suggest that sialidase inhibitors might be useful adjuncts in periodontal therapy.
Abstract.
Roy S, Douglas CWI, Stafford GP (2010). A Novel Sialic Acid Utilization and Uptake System in the Periodontal Pathogen Tannerella forsythia.
Journal of Bacteriology,
192(9), 2285-2293.
Abstract:
A Novel Sialic Acid Utilization and Uptake System in the Periodontal Pathogen Tannerella forsythia
ABSTRACT
.
. Tannerella forsythia is a key contributor to periodontitis, but little is known of its virulence mechanisms. In this study we have investigated the role of sialic acid in biofilm growth of this periodontal pathogen. Our data show that biofilm growth of T. forsythia is stimulated by sialic acid, glycolyl sialic acid, and sialyllactose, all three of which are common sugar moieties on a range of important host glycoproteins. We have also established that growth on sialyllactose is dependent on the sialidase of T. forsythia since the sialidase inhibitor oseltamivir suppresses growth on sialyllactose. The genome of T. forsythia contains a sialic acid utilization locus, which also encodes a putative inner membrane sialic acid permease (NanT), and we have shown this is functional when it is expressed in Escherichia coli. This genomic locus also contains a putatively novel TonB-dependent outer membrane sialic acid transport system (TF0033-TF0034). In complementation studies using an Escherichia coli strain devoid of its outer membrane sialic acid transporters, the cloning and expression of the TF0033-TF0034 genes enabled an E. coli nanR nanC ompR strain to utilize sialic acid as the sole carbon and energy source. We have thus identified a novel sialic acid uptake system that couples an inner membrane permease with a TonB-dependent outer membrane transporter, and we propose to rename these novel sialic acid uptake genes nanO and nanU, respectively. Taken together, these data indicate that sialic acid is a key growth factor for this little-characterized oral pathogen and may be key to its physiology in vivo.
Abstract.
Pham TK, Roy S, Noirel J, Douglas I, Wright PC, Stafford GP (2010). A quantitative proteomic analysis of biofilm adaptation by the periodontal pathogen Tannerella forsythia. PROTEOMICS, 10(17), 3130-3141.
Publications by category
Journal articles
Harmer NJ, Roy S, Vivoli M (2019). Carbohydrate Kinases: a Conserved Mechanism Across Differing Folds.
Catalysts,
9, 29-29.
Full text.
Cross AR, Baldwin VM, Roy S, Essex-Lopresti AE, Prior JL, Harmer NJ (2019). Zoonoses under our noses.
Microbes Infect,
21(1), 10-19.
Abstract:
Zoonoses under our noses.
One Health is an effective approach for the management of zoonotic disease in humans, animals and environments. Examples of the management of bacterial zoonoses in Europe and across the globe demonstrate that One Health approaches of international surveillance, information-sharing and appropriate intervention methods are required to successfully prevent and control disease outbreaks in both endemic and non-endemic regions. Additionally, a One Health approach enables effective preparation and response to bioterrorism threats.
Abstract.
Author URL.
Full text.
Phansopa C, Roy S, Rafferty JB, Douglas CWI, Pandhal J, Wright PC, Kelly DJ, Stafford GP (2014). Structural and functional characterization of NanU, a novel high-affinity sialic acid-inducible binding protein of oral and gut-dwelling Bacteroidetes species.
Biochemical Journal,
458(3), 499-511.
Abstract:
Structural and functional characterization of NanU, a novel high-affinity sialic acid-inducible binding protein of oral and gut-dwelling Bacteroidetes species
We biochemically and structurally characterize a novel inducible surface-associated sialic acid-binding protein present in human-dwelling Bacteroidetes species that represents a novel type of sialic acid-specific polysaccharide utilization locus.
Abstract.
Settem RP, Honma K, Nakajima T, Phansopa C, Roy S, Stafford GP, Sharma A (2012). A bacterial glycan core linked to surface (S)-layer proteins modulates host immunity through Th17 suppression. Mucosal Immunology, 6(2), 415-426.
Roy S, Phansopa C, Stafford P, Honma K, Douglas CWI, Sharma A, Stafford GP (2012). Beta-hexosaminidase activity of the oral pathogenTannerella forsythiainfluences biofilm formation on glycoprotein substrates. FEMS Immunology & Medical Microbiology, 65(1), 116-120.
Roy S, Honma K, Douglas CWI, Sharma A, Stafford GP (2011). Role of sialidase in glycoprotein utilization by Tannerella forsythia.
Microbiology,
157(11), 3195-3202.
Abstract:
Role of sialidase in glycoprotein utilization by Tannerella forsythia
The major bacterial pathogens associated with periodontitis include Tannerella forsythia. We previously discovered that sialic acid stimulates biofilm growth of T. forsythia, and that sialidase activity is key to utilization of sialoconjugate sugars and is involved in host–pathogen interactions in vitro. The aim of this work was to assess the influence of the NanH sialidase on initial biofilm adhesion and growth in experiments where the only source of sialic acid was sialoglycoproteins or human oral secretions. After showing that T. forsythia can utilize sialoglycoproteins for biofilm growth, we showed that growth and initial adhesion with sialylated mucin and fetuin were inhibited two- to threefold by the sialidase inhibitor oseltamivir. A similar reduction (three- to fourfold) was observed with a nanH mutant compared with the wild-type. Importantly, these data were replicated using clinically relevant serum and saliva samples as substrates. In addition, the ability of the nanH mutant to form biofilms on glycoprotein-coated surfaces could be restored by the addition of purified NanH, which we show is able to cleave sialic acid from the model glycoprotein fetuin and, much less efficiently, 9-O-acetylated bovine submaxillary mucin. These data show for the first time that glycoprotein-associated sialic acid is likely to be a key in vivo nutrient source for T. forsythia when growing in a biofilm, and suggest that sialidase inhibitors might be useful adjuncts in periodontal therapy.
Abstract.
Stafford G, Roy S, Honma K, Sharma A (2011). Sialic acid, periodontal pathogens and Tannerella forsythia: stick around and enjoy the feast!. Molecular Oral Microbiology, 27(1), 11-22.
Roy S, Douglas CWI, Stafford GP (2010). A Novel Sialic Acid Utilization and Uptake System in the Periodontal Pathogen Tannerella forsythia.
Journal of Bacteriology,
192(9), 2285-2293.
Abstract:
A Novel Sialic Acid Utilization and Uptake System in the Periodontal Pathogen Tannerella forsythia
ABSTRACT
.
. Tannerella forsythia is a key contributor to periodontitis, but little is known of its virulence mechanisms. In this study we have investigated the role of sialic acid in biofilm growth of this periodontal pathogen. Our data show that biofilm growth of T. forsythia is stimulated by sialic acid, glycolyl sialic acid, and sialyllactose, all three of which are common sugar moieties on a range of important host glycoproteins. We have also established that growth on sialyllactose is dependent on the sialidase of T. forsythia since the sialidase inhibitor oseltamivir suppresses growth on sialyllactose. The genome of T. forsythia contains a sialic acid utilization locus, which also encodes a putative inner membrane sialic acid permease (NanT), and we have shown this is functional when it is expressed in Escherichia coli. This genomic locus also contains a putatively novel TonB-dependent outer membrane sialic acid transport system (TF0033-TF0034). In complementation studies using an Escherichia coli strain devoid of its outer membrane sialic acid transporters, the cloning and expression of the TF0033-TF0034 genes enabled an E. coli nanR nanC ompR strain to utilize sialic acid as the sole carbon and energy source. We have thus identified a novel sialic acid uptake system that couples an inner membrane permease with a TonB-dependent outer membrane transporter, and we propose to rename these novel sialic acid uptake genes nanO and nanU, respectively. Taken together, these data indicate that sialic acid is a key growth factor for this little-characterized oral pathogen and may be key to its physiology in vivo.
Abstract.
Pham TK, Roy S, Noirel J, Douglas I, Wright PC, Stafford GP (2010). A quantitative proteomic analysis of biofilm adaptation by the periodontal pathogen Tannerella forsythia. PROTEOMICS, 10(17), 3130-3141.
Publications by year
2019
Harmer NJ, Roy S, Vivoli M (2019). Carbohydrate Kinases: a Conserved Mechanism Across Differing Folds.
Catalysts,
9, 29-29.
Full text.
Cross AR, Baldwin VM, Roy S, Essex-Lopresti AE, Prior JL, Harmer NJ (2019). Zoonoses under our noses.
Microbes Infect,
21(1), 10-19.
Abstract:
Zoonoses under our noses.
One Health is an effective approach for the management of zoonotic disease in humans, animals and environments. Examples of the management of bacterial zoonoses in Europe and across the globe demonstrate that One Health approaches of international surveillance, information-sharing and appropriate intervention methods are required to successfully prevent and control disease outbreaks in both endemic and non-endemic regions. Additionally, a One Health approach enables effective preparation and response to bioterrorism threats.
Abstract.
Author URL.
Full text.
2014
Phansopa C, Roy S, Rafferty JB, Douglas CWI, Pandhal J, Wright PC, Kelly DJ, Stafford GP (2014). Structural and functional characterization of NanU, a novel high-affinity sialic acid-inducible binding protein of oral and gut-dwelling Bacteroidetes species.
Biochemical Journal,
458(3), 499-511.
Abstract:
Structural and functional characterization of NanU, a novel high-affinity sialic acid-inducible binding protein of oral and gut-dwelling Bacteroidetes species
We biochemically and structurally characterize a novel inducible surface-associated sialic acid-binding protein present in human-dwelling Bacteroidetes species that represents a novel type of sialic acid-specific polysaccharide utilization locus.
Abstract.
2012
Settem RP, Honma K, Nakajima T, Phansopa C, Roy S, Stafford GP, Sharma A (2012). A bacterial glycan core linked to surface (S)-layer proteins modulates host immunity through Th17 suppression. Mucosal Immunology, 6(2), 415-426.
Roy S, Phansopa C, Stafford P, Honma K, Douglas CWI, Sharma A, Stafford GP (2012). Beta-hexosaminidase activity of the oral pathogenTannerella forsythiainfluences biofilm formation on glycoprotein substrates. FEMS Immunology & Medical Microbiology, 65(1), 116-120.
2011
Roy S, Honma K, Douglas CWI, Sharma A, Stafford GP (2011). Role of sialidase in glycoprotein utilization by Tannerella forsythia.
Microbiology,
157(11), 3195-3202.
Abstract:
Role of sialidase in glycoprotein utilization by Tannerella forsythia
The major bacterial pathogens associated with periodontitis include Tannerella forsythia. We previously discovered that sialic acid stimulates biofilm growth of T. forsythia, and that sialidase activity is key to utilization of sialoconjugate sugars and is involved in host–pathogen interactions in vitro. The aim of this work was to assess the influence of the NanH sialidase on initial biofilm adhesion and growth in experiments where the only source of sialic acid was sialoglycoproteins or human oral secretions. After showing that T. forsythia can utilize sialoglycoproteins for biofilm growth, we showed that growth and initial adhesion with sialylated mucin and fetuin were inhibited two- to threefold by the sialidase inhibitor oseltamivir. A similar reduction (three- to fourfold) was observed with a nanH mutant compared with the wild-type. Importantly, these data were replicated using clinically relevant serum and saliva samples as substrates. In addition, the ability of the nanH mutant to form biofilms on glycoprotein-coated surfaces could be restored by the addition of purified NanH, which we show is able to cleave sialic acid from the model glycoprotein fetuin and, much less efficiently, 9-O-acetylated bovine submaxillary mucin. These data show for the first time that glycoprotein-associated sialic acid is likely to be a key in vivo nutrient source for T. forsythia when growing in a biofilm, and suggest that sialidase inhibitors might be useful adjuncts in periodontal therapy.
Abstract.
Stafford G, Roy S, Honma K, Sharma A (2011). Sialic acid, periodontal pathogens and Tannerella forsythia: stick around and enjoy the feast!. Molecular Oral Microbiology, 27(1), 11-22.
2010
Roy S, Douglas CWI, Stafford GP (2010). A Novel Sialic Acid Utilization and Uptake System in the Periodontal Pathogen Tannerella forsythia.
Journal of Bacteriology,
192(9), 2285-2293.
Abstract:
A Novel Sialic Acid Utilization and Uptake System in the Periodontal Pathogen Tannerella forsythia
ABSTRACT
.
. Tannerella forsythia is a key contributor to periodontitis, but little is known of its virulence mechanisms. In this study we have investigated the role of sialic acid in biofilm growth of this periodontal pathogen. Our data show that biofilm growth of T. forsythia is stimulated by sialic acid, glycolyl sialic acid, and sialyllactose, all three of which are common sugar moieties on a range of important host glycoproteins. We have also established that growth on sialyllactose is dependent on the sialidase of T. forsythia since the sialidase inhibitor oseltamivir suppresses growth on sialyllactose. The genome of T. forsythia contains a sialic acid utilization locus, which also encodes a putative inner membrane sialic acid permease (NanT), and we have shown this is functional when it is expressed in Escherichia coli. This genomic locus also contains a putatively novel TonB-dependent outer membrane sialic acid transport system (TF0033-TF0034). In complementation studies using an Escherichia coli strain devoid of its outer membrane sialic acid transporters, the cloning and expression of the TF0033-TF0034 genes enabled an E. coli nanR nanC ompR strain to utilize sialic acid as the sole carbon and energy source. We have thus identified a novel sialic acid uptake system that couples an inner membrane permease with a TonB-dependent outer membrane transporter, and we propose to rename these novel sialic acid uptake genes nanO and nanU, respectively. Taken together, these data indicate that sialic acid is a key growth factor for this little-characterized oral pathogen and may be key to its physiology in vivo.
Abstract.
Pham TK, Roy S, Noirel J, Douglas I, Wright PC, Stafford GP (2010). A quantitative proteomic analysis of biofilm adaptation by the periodontal pathogen Tannerella forsythia. PROTEOMICS, 10(17), 3130-3141.