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Identification of a Frameshift Mutation Resulting in Premature Termination and Loss of Cell Wall Anchoring of the PAc Antigen of Streptococcus Mutans GS-5

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Journal Infect Immun
Date 1997 Feb 1
PMID 9009344
Citations 13
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Abstract

Most strains of Streptococcus mutans possess a 190-kDa protein antigen (PAc) on their cell surfaces, while strain GS-5 produces extracellularly a 155-kDa PAc protein. The pac gene of strain GS-5 consists of 3,477 bp and codes for a protein of 1,158 amino acids. One insertion of an adenine into the 3,469th, 3,470th, or 3,471st position from the start codon results in a frameshift mutation at codon 1157 with subsequent termination after 3 additional codons.

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