Updated model of group A Streptococcus M proteins based on a comprehensive worldwide study

Group A Streptococcus (GAS) M protein is an important virulence factor and potential vaccine antigen, and constitutes the basis for strain typing (emm-typing). Although >200 emm-types are characterized, structural data were obtained from only a limited number of emm-types. We aim to evaluate the...

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Veröffentlicht in:Clinical microbiology and infection 2013-05, Vol.19 (5), p.E222-E229
Hauptverfasser: McMillan, D.J., Drèze, P. -A., Vu, T., Bessen, D.E., Guglielmini, J., Steer, A.C., Carapetis, J.R., Van Melderen, L., Sriprakash, K.S., Smeesters, P.R.
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container_end_page E229
container_issue 5
container_start_page E222
container_title Clinical microbiology and infection
container_volume 19
creator McMillan, D.J.
Drèze, P. -A.
Vu, T.
Bessen, D.E.
Guglielmini, J.
Steer, A.C.
Carapetis, J.R.
Van Melderen, L.
Sriprakash, K.S.
Smeesters, P.R.
description Group A Streptococcus (GAS) M protein is an important virulence factor and potential vaccine antigen, and constitutes the basis for strain typing (emm-typing). Although >200 emm-types are characterized, structural data were obtained from only a limited number of emm-types. We aim to evaluate the sequence diversity of near-full-length M proteins from worldwide sources and analyse their structure, sequence conservation and classification. GAS isolates recovered from throughout the world during the last two decades underwent emm-typing and complete emm gene sequencing. Predicted amino acid sequence analyses, secondary structure predictions and vaccine epitope mapping were performed using MUSCLE and Geneious software. A total of 1086 isolates from 31 countries were analysed, representing 175 emm-types. emm-type is predictive of the whole protein structure, independent of geographical origin or clinical association. Findings of an emm-type paired with multiple, highly divergent central regions were not observed. M protein sequence length, the presence or absence of sequence repeats and predicted secondary structure were assessed in the context of the latest vaccine developments. Based on these global data, the M6 protein model is updated to a three representative M protein (M5, M80 and M77) model, to aid in epidemiological analysis, vaccine development and M protein-related pathogenesis studies.
doi_str_mv 10.1111/1469-0691.12134
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Although &gt;200 emm-types are characterized, structural data were obtained from only a limited number of emm-types. We aim to evaluate the sequence diversity of near-full-length M proteins from worldwide sources and analyse their structure, sequence conservation and classification. GAS isolates recovered from throughout the world during the last two decades underwent emm-typing and complete emm gene sequencing. Predicted amino acid sequence analyses, secondary structure predictions and vaccine epitope mapping were performed using MUSCLE and Geneious software. A total of 1086 isolates from 31 countries were analysed, representing 175 emm-types. emm-type is predictive of the whole protein structure, independent of geographical origin or clinical association. Findings of an emm-type paired with multiple, highly divergent central regions were not observed. M protein sequence length, the presence or absence of sequence repeats and predicted secondary structure were assessed in the context of the latest vaccine developments. 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Although &gt;200 emm-types are characterized, structural data were obtained from only a limited number of emm-types. We aim to evaluate the sequence diversity of near-full-length M proteins from worldwide sources and analyse their structure, sequence conservation and classification. GAS isolates recovered from throughout the world during the last two decades underwent emm-typing and complete emm gene sequencing. Predicted amino acid sequence analyses, secondary structure predictions and vaccine epitope mapping were performed using MUSCLE and Geneious software. A total of 1086 isolates from 31 countries were analysed, representing 175 emm-types. emm-type is predictive of the whole protein structure, independent of geographical origin or clinical association. Findings of an emm-type paired with multiple, highly divergent central regions were not observed. M protein sequence length, the presence or absence of sequence repeats and predicted secondary structure were assessed in the context of the latest vaccine developments. Based on these global data, the M6 protein model is updated to a three representative M protein (M5, M80 and M77) model, to aid in epidemiological analysis, vaccine development and M protein-related pathogenesis studies.</abstract><cop>England</cop><pub>Elsevier Ltd</pub><pmid>23464795</pmid><doi>10.1111/1469-0691.12134</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0002-8566-1726</orcidid><oa>free_for_read</oa></addata></record>
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subjects Antigens, Bacterial - chemistry
Antigens, Bacterial - genetics
Antigens, Bacterial - immunology
Bacterial Outer Membrane Proteins - chemistry
Bacterial Outer Membrane Proteins - genetics
Bacterial Outer Membrane Proteins - immunology
Bacteriology
Carrier Proteins - chemistry
Carrier Proteins - genetics
Carrier Proteins - immunology
DNA, Bacterial - chemistry
DNA, Bacterial - genetics
Epidemiology
Epitope Mapping
Epitopes - genetics
Epitopes - immunology
Genetic Variation
Global Health
Humans
Life Sciences
M protein
Microbiology and Parasitology
Models, Molecular
Molecular Sequence Data
Protein Conformation
Proteins
Sequence Analysis, DNA
Streptococcal Infections - microbiology
Streptococcus
Streptococcus pyogenes
Streptococcus pyogenes - chemistry
Streptococcus pyogenes - genetics
Streptococcus pyogenes - immunology
Streptococcus pyogenes - isolation & purification
typing
vaccine
Vaccines
virulence
title Updated model of group A Streptococcus M proteins based on a comprehensive worldwide study
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