Taxonomic group: bacteria / Firmicutes
(Phylum: Firmicutes)
Associated disease: infection due to Streptococcus pneumoniae [ICD11:
XN3PW 
]
NCBI PubMed ID: 12055294Journal NLM ID: 0376646Publisher: Washington, DC: Kluwer Academic/Plenum Publishers
Correspondence: j.vanputten
vet.uu.nl
Institutions: Bacteriology Division, Department of Infectious Diseases and Immunology, Utrecht University, PO Box 80.165, 3508 TD Utrecht, The Netherlands, Genencor International B. V., 2300 AE Leiden, The Netherlands, National Institute of Public Health and the Environment, 3720 BA Bilthoven, The Netherlands
The capsular polysaccharide (CPS) synthesis locus of Streptococcus pneumoniae serotype 9V was amplified by long-range PCR and sequenced. The locus was 17368 bp in size and contained 15 ORFs. The genetic organization of the cluster shared many features with other S. pneumoniae capsule loci, including the presence of four putative regulatory genes at the 5' end. Comparative sequence analyses allowed putative functions to be assigned to each of the gene products. The ORFs appeared to encode, besides the four regulatory genes, five glycosyltransferases, two O-acetyltransferases, an N-acetylglucosamine 2-epimerase, a glucose 6-dehydrogenase, an oligosaccharide transporter protein and a polysaccharide repeating unit polymerase. These functions covered the steps proposed in the CPS biosynthesis of serotype 9V. TLC of carbohydrate intermediates formed after incubation of bacterial membrane preparations with 14C-labelled precursors demonstrated that the fifth ORF (cps9vE) encoded a UDP-glucosyl-1-phosphate transferase. This function was confirmed with the help of a cps9vE mutant that carried a deletion of a guanine residue located adjacent to a stretch of adenines. The identification and characterization of the serotype 9V locus is a major step in unravelling the 9V capsule biosynthesis pathway and broadens the insight into the genetic diversity of the S. pneumoniae capsule loci
capsular polysaccharide biosynthesis, glucosyltransferase
Structure type: polymer chemical repeating unit
Location inside paper: fig.2, p.1751
Compound class: CPS
Contained glycoepitopes: IEDB_115136,IEDB_136906,IEDB_137472,IEDB_140630,IEDB_141794,IEDB_142488,IEDB_144998,IEDB_146664,IEDB_151528,IEDB_190606,IEDB_885813,IEDB_983931,SB_192,SB_61,SB_7
Biosynthesis and genetic data: biosynthesis data, genetic data
Comments, role: total content of O-acetyl groups is 1.13 per repeating unit
Related record ID(s): 7512
NCBI Taxonomy refs (TaxIDs): 1313Reference(s) to other database(s): GTC:G06247CS, GlycomeDB:
26570
Show glycosyltransferases
There is only one chemically distinct structure:
Found 
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