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The type-specific substance from Pneumococcus type 11A(43).

ABSTRACT: 1. The type-specific substance from Pneumococcus type 11A(43) is a polymer containing d-glucose, d-galactose, glycerol, phosphate and O-acetyl in the approximate molecular proportions 2:2:1:1:2. 2. Removal of the O-acetyl groups with ammonia gave a compound no longer active towards type 11A antiserum. 3. Treatment of S.11A with sodium borohydride, followed by hydrolysis with alkali yielded a phosphorus-free polysaccharide, whose structure was studied by methylation and by degradation with periodate. 4. Examination of S.11A and its de-O-acetyl derivative by periodate oxidation led to the partial structure (XI) for the type-specific substance, which thus has several features in common with S.18.

SUBMITTER: Kennedy DA

PROVIDER: S-EPMC1185066 | biostudies-other | 1969 Oct

REPOSITORIES: biostudies-other

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The type-specific substance from Pneumococcus type 33B.

Project description:1. The type-specific substance, S. 33B, from Pneumococcus type 33B contains P, 2.89; hexose, 51; total sugar, 69; galactosamine, 18; and d-glucose, 20%. 2. After degradation with alkali, followed by enzymic dephosphorylation, S. 33B yielded a hexasaccharide. 3. The hexasaccharide was assigned the structure O-beta-d-glucopyranosyl- (1-->5)-O-beta-d-galactofuranosyl- (1-->3)-O-2-acetamido-2-deoxy-beta-d- galactopyranosyl-(1-->4)-O-[alpha-d- galactopyranosyl-(1-->2)]-alpha-d-galactopyranosyl- (1-->2)-ribitol. 4. Phosphate residues in S. 33B are located on the hydroxyl groups at position 5 of ribitol units and on the hydroxyl groups at position 6 of hexopyranose residues.

| S-EPMC1166164 | biostudies-other

The type-specific substance from Pneumococcus type 29.

Project description:1. A pentasaccharide, corresponding to the dephosphorylated repeating unit of the specific substance, S.29, from Pneumococcus type 29, was obtained by hydrolysis with alkali followed by enzymic dephosphorylation. 2. The pentasaccharide was shown to be O-2-acetamido-2-deoxy-beta-d-galactopyranosyl-(1-->6)-O-beta-d-galactofuranosyl-(1-->3)-O-beta-d-galactopyranosyl-(1-->6)-O-beta-d-galactofuranosyl-(1-->1)-ribitol. 3. The phosphodiester linkages in S.29 join the hydroxyl group at position 5 of ribitol and the hydroxyl group at position 3 or 4 of a 2-acetamido-2-deoxy-d-galactose residue in the next repeating unit. 4. A partial structure for S.29 was deduced from these experiments.

| S-EPMC1187575 | biostudies-other

The type-specific substance from Pneumococcus type 13.

Project description:1. The type-specific substance, S.13, from Pneumococcus type 13 was subjected to hydrolysis with alkali, followed by enzymic dephosphorylation, to yield a pentasaccharide. 2. The pentasaccharide, corresponding to the dephosphorylated repeating unit of S.13, was shown to be O-beta-d-galactopyranosyl-(1-->4)-O-beta- d-glucopyranosyl-(1-->3)-O-beta-d- galactofuranosyl-(1-->4)-O-2-acetamido-2-deoxy-beta-d- glucopyranosyl-(1-->2)-ribitol. 3. The phosphodiester linkages in S.13 join the hydroxyl group at position 1 of ribitol and the hydroxyl group at position 4 of a galactopyranosyl residue in the next repeating unit. 4. Ester groups, presumably O-acetyl, are located on positions 2 or 3 of most glucopyranosyl residues in S.13. 5. A partial structure for S.13 is proposed.

| S-EPMC1174299 | biostudies-other

The type-specific substance from Pneumococcus type 10A(34). The phosphodiester linkages.

Project description:1. The phosphate groups in the type-specific substance S. 10A from Pneumococcus type 10A (34) were shown to join the hydroxyl group at position 1 or 5 of ribitol and the hydroxyl group at position 5 or 6 of a d-galactofuranosyl residue in the next repeating unit. 2. A partial formula of the type-specific substance was derived.

| S-EPMC1265219 | biostudies-other

The specific substance from Pneumococcus type 34 (41). The phosphodiester linkages.

Project description:1. The phosphate groups in the type-specific substance S.34 from Pneumococcus type 34 (U.S. type 41) were shown to join the hydroxyl group at position 1 or 5 of ribitol and the hydroxyl group at position 3 of a d-galactofuranosyl residue in the next repeating unit. 2. A partial structure of the type-specific substance was derived. 3. New syntheses of d-galactose 2-phosphate and d-galactose 3-phosphate are described.

| S-EPMC1186944 | biostudies-other

The type-specific substance from Pneumococcus type 10A(34). Structure of the dephosphorylated repeating unit.

Project description:1. A hexasaccharide unit was isolated from the specific substance S. 10A from Pneumococcus type 10A (34) by hydrolysis with alkali followed by enzymic dephosphorylation. 2. The hexasaccharide was shown to be O-d-galactofuranosyl-(1-->3)-O-d- galactopyranosyl-(1-->4)-O-[d-galactofuranosyl- (1-->6)]-O-2-acet-amido-2-deoxy-d-galactopyranosyl- (1-->3)-O-d-galactopyranosyl-(1-->2)-ribitol.

| S-EPMC1265218 | biostudies-other

The specific substance from Pneumococcus type 34 the configuration of the glycosidic linkages.

Project description:1. The specific compound from Pneumococcus type 34 was isolated from capsular material by ion-exchange chromatography. This separated it from a substance with chemical and serological properties corresponding to those reported for C-substance. 2. The configuration of the two galactofuranosyl linkages in the repeating unit of S.34 was determined and the configurations previously assigned to the other glycosidic linkages were confirmed. 3. The dephosphorylated deacetylated repeating unit is thus O-beta-d-galactofuranosyl-(1-->3)-O-alpha-d-glucopyranosyl-(1-->2)-O-beta-d-galactofuranosyl-(1-->3)-O-alpha-d-galactopyranosyl- (1-->2)-ribitol.

| S-EPMC1265164 | biostudies-other

Genomic analyses of recombinant adenovirus type 11a in China.

Project description:Whole-genome sequencing of human adenovirus type 11 (HAdV-11) strain QS, isolated in China, was conducted, and its sequence was compared with the sequences of strains within the species of HAdVs. The HAdV-11 QS genome contains 34,755 nucleotides. Similar to the other HAdV subgenus B sequences, the HAdV-11 QS genome coded 37 functional proteins and could be divided into four early, two intermediate, and five late transcription regions. The amino acid sequences of the fiber and the hypervariable regions (HVRs) within the hexon gene of HAdV-11 QS were identical to the corresponding sequences of the HAdV-11a strain; further analyses that compared those amino acid sequences with the amino acid sequences of the HAdV species subgenus B:2 strains revealed that the highest degree of homology (>99.2%) existed between HAdV-11 QS and the prototypical HAdV-14 strain, except for a few coding sequences of HVRs within the hexon gene, DNA polymerase, pVI, and pre-terminal protein. This indicate that HAdV-11 strain QS, isolated in China, is a recombinant adenovirus of HAdV-14, and the recombination analyses also confirmed this finding. It is difficult to clarify the time and manner of the recombination, and further investigations are required to determine whether the emergence of recombination between HAdV-11a and HAdV-14 might increase virulence, thereby posing a new global challenge with regard to acute respiratory diseases in the near future.

| S-EPMC2756911 | biostudies-literature

Ficolin-2 binds to serotype 35B pneumococcus as it does to serotypes 11A and 31, and these serotypes cause more infections in older adults than in children.

Project description:Among 98 serotypes of Streptococcus pneumoniae, only a small subset regularly causes invasive pneumococcal diseases (IPD). We previously demonstrated that serotype 11A binds to ficolin-2 and has low invasiveness in children. Epidemiologic data suggested, however, that serotype 11A IPD afflicts older adults, possibly indicating reduced ficolin-2-mediated immune protection. Therefore, we studied the epidemiology of ficolin-2-bound serotypes. We obtained IPD case data from the United States Centers for Disease Control and Prevention. We studied three prominent ficolin-2-bound serotypes and their acetyltransferase-deficient variants for ficolin-2 binding and ficolin-2-mediated complement deposition with flow-cytometry. We determined the age distributions of these serotypes from the obtained epidemiologic data. We discovered that the serotype 35B capsule is a novel ficolin-2 ligand due to O-acetylation via WciG. Ficolin-2-mediated complement deposition was observed on serotypes 11A and 35B but not serotype 31 or any O-acetyl transferase deficient derivatives of these serotypes. Serotypes 11A, 35B, and 31 cause more IPD among older adults than children. Studies of the three serotypes provide additional evidence for ficolin-2 providing innate immunity against IPD. The skewed age distribution of the three serotypes suggests that older adults have reduced ficolin-2-mediated immunity and are more susceptible to these serotypes.

| S-EPMC6306229 | biostudies-literature

Penicillin Resistance of Nonvaccine Type Pneumococcus before and after PCV13 Introduction, United States.

Project description:Introduction of 13-valent pneumococcal conjugate vaccine in the United States was not associated with a significant change in prevalence of penicillin resistance in nonvaccine type serotypes because of the variable success of highly resistant serotypes. Differences in regional serotype distribution and serotype-specific resistance contributed to geographic heterogeneity of penicillin resistance.

| S-EPMC5443431 | biostudies-literature

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