1
|
Arbatsky NP, Shashkov AS, Shneider MM, Popova AV, Kasimova AA, Miroshnikov KA, Knirel YA, Hall RM, Kenyon JJ. The K89 capsular polysaccharide produced by Acinetobacter baumannii LUH5552 consists of a pentameric repeat-unit that includes a 3-acetamido-3,6-dideoxy-d-galactose residue. Int J Biol Macromol 2022; 217:515-521. [PMID: 35843396 DOI: 10.1016/j.ijbiomac.2022.07.085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/17/2022] [Accepted: 07/11/2022] [Indexed: 11/17/2022]
Abstract
Acinetobacter baumannii isolate LUH5552 carries the KL89 capsule biosynthesis gene cluster. Capsular polysaccharide (CPS) isolated from LUH5552 was analyzed by sugar analysis, Smith degradation, and one- and two-dimensional 1H and 13C NMR spectroscopy. The K89 CPS structure has not been seen before in A. baumannii CPS structures resolved to date and includes a 3-acetamido-3,6-dideoxy-d-galactose (d-Fucp3NAc) residue which is rare amongst A. baumannii CPS. The K89 CPS has a →3)-α-d-GalpNAc-(1→3)-β-d-GlcpNAc-(1→ main chain with a β-d-Glcp-(1→2)-β-d-Fucp3NAc-(1→6)-d-Glcp side branch that is α-(1→4) linked to d-GalpNAc. The roles of the Wzy polymerase and the four glycosyltransferases encoded by the KL89 gene cluster in the biosynthesis of the K89 CPS were assigned. Two glycosyltransferases, Gtr121 and Gtr122, link the d-Fucp3NAc to its neighboring sugars.
Collapse
Affiliation(s)
- Nikolay P Arbatsky
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Alexander S Shashkov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Mikhail M Shneider
- M. M. Shemyakin & Y. A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Anastasiya V Popova
- Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region, Russia; State Research Center for Applied Microbiology and Biotechnology, Obolensk, Moscow Region, Russia
| | - Anastasiya A Kasimova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Konstantin A Miroshnikov
- M. M. Shemyakin & Y. A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Yuriy A Knirel
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Ruth M Hall
- School of Life and Environmental Sciences, The University of Sydney, Sydney, Australia
| | - Johanna J Kenyon
- Centre for Immunology and Infection Control, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, Australia.
| |
Collapse
|
2
|
Shah BS, Ashwood HE, Harrop SJ, Farrugia DN, Paulsen IT, Mabbutt BC. Crystal structure of a UDP-GlcNAc epimerase for surface polysaccharide biosynthesis in Acinetobacter baumannii. PLoS One 2018; 13:e0191610. [PMID: 29352301 PMCID: PMC5774825 DOI: 10.1371/journal.pone.0191610] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Accepted: 01/08/2018] [Indexed: 11/29/2022] Open
Abstract
With new strains of Acinetobacter baumannii undergoing genomic analysis, it has been possible to define regions of genomic plasticity (RGPs), encoding specific adaptive elements. For a selected RGP from a community-derived isolate of A. baumannii, we outline sequences compatible with biosynthetic machinery of surface polysaccharides, specifically enzymes utilized in the dehydration and conversion of UDP-N-acetyl-D-glucosamine (UDP-D-GlcNAc). We have determined the crystal structure of one of these, the epimerase Ab-WbjB. This dehydratase belongs to the ‘extended’ short-chain dehydrogenase/reductase (SDR) family, related in fold to previously characterised enzymes CapE and FlaA1. Our 2.65Å resolution structure of Ab-WbjB shows a hexamer, organised into a trimer of chain pairs, with coenzyme NADP+ occupying each chain. Specific active-site interactions between each coenzyme and a lysine quaternary group of a neighbouring chain interconnect adjacent dimers, so stabilising the hexameric form. We show UDP-GlcNAc to be a specific substrate for Ab-WbjB, with binding evident by ITC (Ka = 0.23 μmol-1). The sequence of Ab-WbjB shows variation from the consensus active-site motifs of many SDR enzymes, demonstrating a likely catalytic role for a specific threonine sidechain (as an alternative to tyrosine) in the canonical active site chemistry of these epimerases.
Collapse
Affiliation(s)
- Bhumika S. Shah
- Department of Molecular Sciences, Macquarie University, Sydney, Australia
| | - Heather E. Ashwood
- Department of Molecular Sciences, Macquarie University, Sydney, Australia
| | - Stephen J. Harrop
- School of Physics, The University of New South Wales, Sydney, Australia
| | - Daniel N. Farrugia
- Department of Molecular Sciences, Macquarie University, Sydney, Australia
| | - Ian T. Paulsen
- Department of Molecular Sciences, Macquarie University, Sydney, Australia
| | - Bridget C. Mabbutt
- Department of Molecular Sciences, Macquarie University, Sydney, Australia
- * E-mail:
| |
Collapse
|
3
|
Abstract
The genus Acinetobacter encompasses multiple nosocomial opportunistic pathogens that are of increasing worldwide relevance because of their ability to survive exposure to various antimicrobial and sterilization agents. Among these, Acinetobacter baumannii, Acinetobacter nosocomialis, and Acinetobacter pittii are the most frequently isolated in hospitals around the world. Despite the growing incidence of multidrug-resistant Acinetobacter spp., little is known about the factors that contribute to pathogenesis. New strategies for treating and managing infections caused by multidrug-resistant Acinetobacter strains are urgently needed, and this requires a detailed understanding of the pathobiology of these organisms. In recent years, some virulence factors important for Acinetobacter colonization have started to emerge. In this review, we focus on several recently described virulence factors that act at the bacterial surface level, such as the capsule, O-linked protein glycosylation, and adhesins. Furthermore, we describe the current knowledge regarding the type II and type VI secretion systems present in these strains.
Collapse
|
4
|
Giguère D. Surface polysaccharides from Acinetobacter baumannii : Structures and syntheses. Carbohydr Res 2015; 418:29-43. [DOI: 10.1016/j.carres.2015.10.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 09/30/2015] [Accepted: 10/03/2015] [Indexed: 12/31/2022]
|
5
|
Kokoulin MS, Komandrova NA, Kalinovskiy AI, Tomshich SV, Romanenko LA, Vaskovsky VV. Structure of the O-specific polysaccharide from the deep-sea marine bacterium Idiomarina abyssalis КММ 227(T) containing a 2-O-sulfate-3-N-(4-hydroxybutanoyl)-3,6-dideoxy-d-glucose. Carbohydr Res 2015; 413:100-6. [PMID: 26117228 DOI: 10.1016/j.carres.2015.05.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 05/27/2015] [Accepted: 05/29/2015] [Indexed: 11/29/2022]
Abstract
The O-specific polysaccharide was isolated from the lipopolysaccharide of type strain Idiomarina abyssalis КММ 227(T) and studied by sugar analysis, Smith degradation, and two-dimensional (1)H and (13)C NMR spectroscopy including (1)H,(1)H-TOCSY, (1)H,(1)H-COSY, (1)H,(1)H-ROESY, (1)H,(13)C-HSQC, (1)H,(13)C-HMBC, (1)H,(13)C-H2BC and (1)H,(13)C-HSQC-TOCSY experiments. The new structure of the O-specific polysaccharide of I. abyssalis КММ 227(T) containing 2-O-sulfate-3-N-(4-hydroxybutanoyl)-3,6-dideoxy-d-glucose was established.
Collapse
Affiliation(s)
- Maxim S Kokoulin
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Russia.
| | - Nadezhda A Komandrova
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Russia
| | - Anatoly I Kalinovskiy
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Russia
| | - Svetlana V Tomshich
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Russia
| | - Lyudmila A Romanenko
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Russia
| | - Victor V Vaskovsky
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Russia; Far Eastern Federal University, Vladivostok, Russia
| |
Collapse
|
6
|
The structure of the polysaccharide isolated from Acinetobacter baumannii strain LAC-4. Carbohydr Res 2014; 390:42-5. [PMID: 24690675 DOI: 10.1016/j.carres.2014.03.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 02/28/2014] [Accepted: 03/03/2014] [Indexed: 11/22/2022]
Abstract
The structure of the surface polysaccharide from a hypervirulent for mice Acinetobacter baumannii strain LAC-4 was studied. The polysaccharide was built of trisaccharide repeating units containing α-l-fucosamine, α-d-glucosamine, and α-8-epi-legionaminic acid. The structure interpretation was based mostly on NMR data. Polysaccharide was obtained using a procedure of LPS O-chain preparation, although whether it is an LPS O-chain or capsular polysaccharide remained unclear.
Collapse
|
7
|
MacLean LL, Perry MB, Chen W, Vinogradov E. The structure of the polysaccharide O-chain of the LPS from Acinetobacter baumannii strain ATCC 17961. Carbohydr Res 2009; 344:474-8. [PMID: 19187931 DOI: 10.1016/j.carres.2008.12.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2008] [Revised: 12/03/2008] [Accepted: 12/05/2008] [Indexed: 10/21/2022]
Abstract
The gram-negative bacterium Acinetobacter baumannii strain ATCC17961 has been used by several laboratories in mouse models of respiratory A. baumannii infection, and a study of the role of its lipopolysaccharide in the pathogenicity is of interest. The structure of the O-deacylated polysaccharide O-chain component of its LPS has been determined by 2D NMR spectroscopy and mass spectrometry methods, and by the structural identification of oligosaccharides obtained by sequential application of the Smith degradation of the O-antigen. The O-chain was determined to be a polymer of a branched pentasaccharide repeating unit composed of 2,3-diacetamido-2,3-dideoxy-D-glucuronic acid, 2-acetamido-2-deoxy-D-glucose, 2-acetamido-2-deoxy-D-galactose, D-glucose, and D-galactose, and has the following structure: [carbohydrate sequence see in text].
Collapse
Affiliation(s)
- Leann L MacLean
- Institute for Biological Sciences, National Research Council Canada, ON, Canada
| | | | | | | |
Collapse
|
8
|
Hanuszkiewicz A, Kaczyński Z, Lindner B, Goldmann T, Vollmer E, Debarry J, Heine H, Holst O. Structural Analysis of the Capsular Polysaccharide fromAcinetobacter lwoffiiF78. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800887] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
9
|
Abstract
The polymeric O-antigen was isolated from the lipopolysaccharide of the reference of the reference strain for Acinetobacter baumannii serogroup O-7. Both the lipopolysaccharide and the isolated polymer reacted with the homologous antiserum. Monosaccharide analyses and NMR spectra showed that the polymer had a hexasaccharide repeating unit constructed from residues of L-rhamnose (4) and N-acetyl-D-glucosamine (2). The following structure for the repeating unit was established by means of detailed interpretation of the NMR spectra, methylation analysis, and chemical degradations. The tetrasaccharide backbone is identical to that for the O-10 antigen of A. baumannii, which has alpha-D-ManpNAc as the lateral substituent in place of the disaccharide present in the O-7 antigen. [formula: see text]
Collapse
|
10
|
Haseley SR, Wilkinson SG. Structural studies of the putative O-specific polysaccharide of Acinetobacter baumannii O24 containing 5,7-diamino-3,5,7,9-tetradeoxy-L-glycero-D-galacto-nonulosonic acid. EUROPEAN JOURNAL OF BIOCHEMISTRY 1997; 250:617-23. [PMID: 9428717 DOI: 10.1111/j.1432-1033.1997.0617a.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A polysaccharide containing D-GlcN, 2-amino-2,6-dideoxy-L-galactose (L-FucN), and 7-acetamido-5-acylamino-3,5,7,9-tetradeoxy-L-glycero-D-galacto-nonulo sonic acid (LegAX), in which the acyl group (X) is either S-3-hydroxybutyryl (50%) or acetyl (50%), was isolated by mild acid hydrolysis treatment, followed by gel-permeation chromatography, of the water-soluble lipopolysaccharide from Acinetobacter baumannii serogroup O24. The polysaccharide, characterised by means of monosaccharide analyses, partial acid hydrolysis, methylation analysis and NMR studies, was shown to have a linear tetrasaccharide repeating unit, as depicted below. Serological tests indicated that the polymer corresponded to the O24 antigen. -->6)-alpha-D-GlcpNAc-(1-->3)-alpha-L-FucpNAc-(1-->3)-alpha-D-Glcp NAc-(1-->4)-beta-LegpAX-(1-->.
Collapse
Affiliation(s)
- S R Haseley
- School of Chemistry, University of Hull, England
| | | |
Collapse
|
11
|
Haseley SR, Holst O, Brade H. Structural and serological characterisation of the O-antigenic polysaccharide of the lipopolysaccharide from Acinetobacter strain 90 belonging to DNA group 10. EUROPEAN JOURNAL OF BIOCHEMISTRY 1997; 245:470-6. [PMID: 9151981 DOI: 10.1111/j.1432-1033.1997.t01-1-00470.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Water-soluble lipopolysaccharide (phenol/water extraction) isolated from Acinetobacter strain 90, which belongs to DNA group 10, was hydrolysed with 1% acetic acid, ultracentrifuged, and water-soluble products finally eluted from a Sephadex G-50 column. The major fraction, a polysaccharide, contained D-Gal, D-GlcNAc, D-GalNAc, and 4,6-dideoxy-4-[(R)-3-hydroxybutyramido]-D-galactose (Fuc4NBuOH). The polysaccharide was characterised by means of monosaccharide analyses, Smith-degradation, N-deacetylation/deamination, and NMR studies, and was shown to have a branched pentasaccharide repeating unit. [structure in text] This structure was specifically recognised in western blots and enzyme immunoassays by polyclonal rabbit antisera.
Collapse
Affiliation(s)
- S R Haseley
- Division of Medical and Biochemical Microbiology, Research Centre Borstel, Centre for Medicine and Biosciences, Germany
| | | | | |
Collapse
|
12
|
Haseley SR, Pantophlet R, Brade L, Holst O, Brade H. Structural and serological characterisation of the O-antigenic polysaccharide of the lipopolysaccharide from Acinetobacter junii strain 65. EUROPEAN JOURNAL OF BIOCHEMISTRY 1997; 245:477-81. [PMID: 9151982 DOI: 10.1111/j.1432-1033.1997.t01-1-00477.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A polysaccharide containing rhamnose (Rha) and Gal was isolated by acetic acid hydrolysis, followed by gel-permeation chromatography, from the water-soluble lipopolysaccharide (phenol/water extracted) from Acinetobacter junii strain 65. The polysaccharide was characterised by means of monosaccharide analyses, Smith degradation, and NMR studies, and was shown to have a linear pentasaccharide repeating unit, as depicted below. This structure was specifically recognised in western blots and enzyme immunoassays by polyclonal rabbit antisera. [structure in text]
Collapse
Affiliation(s)
- S R Haseley
- Division of Medical and Biochemical Microbiology, Research Centre Borstel, Centre for Medicine and Biosciences, Germany
| | | | | | | | | |
Collapse
|