Shigella flexneri type-specific antigen V: cloning, sequencing and characterization of the glucosyl transferase gene of temperate bacteriophage SfV

With lysogeny by bacteriophage SfV, Shigella flexneri serotype Y is converted to serotype 5a. The glucosyl transferase gene ( gtr) from bacteriophage SfV of S. flexneri, involved in serotype-specific conversion, was cloned and characterized. The DNA sequence of a 3.7 kb EcoRI– BamHI fragment of bact...

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Bibliographic Details
Published in:Gene 1997-08, Vol.195 (2), p.207-216
Main Authors: Huan, Pham thi, Whittle, Belinda L, Bastin, David A, Lindberg, Alf A, Verma, Naresh K
Format: Article
Language:English
Subjects:
Amino Acid Sequence
Antigens, Bacterial - genetics
Antigens, Bacterial - immunology
Bacteriophage SfV
Bacteriophages - genetics
Base Sequence
Cloning, Molecular
Gene Expression
Glucosyl transferase gene
Glucosyltransferases - genetics
Lysogeny
Medicin och hälsovetenskap
Molecular Sequence Data
Open Reading Frames
Phage conversion
Plasmids - genetics
Sequence Alignment
Sequence Analysis, DNA
Sequence Homology, Amino Acid
Shigella flexneri
Shigella flexneri - genetics
Shigella flexneri - immunology
Shigella flexneri - virology
Transformation, Genetic
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Summary:With lysogeny by bacteriophage SfV, Shigella flexneri serotype Y is converted to serotype 5a. The glucosyl transferase gene ( gtr) from bacteriophage SfV of S. flexneri, involved in serotype-specific conversion, was cloned and characterized. The DNA sequence of a 3.7 kb EcoRI– BamHI fragment of bacteriophage SfV which includes the gtr gene was determined. This gene, encoding a polypeptide of 417 aa with 47.67 kDa molecular mass, caused partial serotype conversion of S. flexneri from serotype Y to type V antigen as demonstrated by Western blotting and the sensitivity of the hybrid strain to phage Sf6. The deduced protein of the partially sequenced open reading frame upstream of the gtr showed similarity to various glycosyl transferases of other bacteria. Orf3, separated from the gtr by a non-coding region and transcribed convergently, codes for a 167 aa (18.8 kDa) protein found to have homology with tail fibre genes of phage lambda and P2.
ISSN:0378-1119
1879-0038
DOI:10.1016/S0378-1119(97)00144-3