Abstract:
:The Mfa1 protein of Porphyromonas gingivalis is the structural subunit of the short fimbriae and mediates coadhesion between P. gingivalis and Streptococcus gordonii. We utilized a promoter-lacZ reporter construct to examine the regulation of mfa1 expression in consortia with common oral plaque bacteria. Promoter activity of mfa1 was inhibited by S. gordonii, Streptococcus sanguinis and Streptococcus mitis. In contrast, Streptococcus mutans, Streptococcus cristatus, Actinomyces naeslundii, Actinobacillus actinomycetemcomitans and Fusobacterium nucleatum did not affect mfa1 expression. Expression of SspA/B, the streptococcal receptor for Mfa1, was not required for regulation of mfa1 promoter activity. Proteinaceous molecule(s) in oral streptococci may be responsible for regulation of Mfa1 expression. Porphyromonas gingivalis is capable of detecting heterologous organisms, and responds to selected organisms by specific gene regulation.
journal_name
FEMS Microbiol Lettjournal_title
FEMS microbiology lettersauthors
Park Y,James CE,Yoshimura F,Lamont RJdoi
10.1111/j.1574-6968.2006.00357.xsubject
Has Abstractpub_date
2006-09-01 00:00:00pages
65-71issue
1eissn
0378-1097issn
1574-6968pii
FML357journal_volume
262pub_type
杂志文章abstract::Chronological analysis of 125 Vibrio cholerae O139 strains isolated during 1993-2005 in Kolkata revealed the prevalence of two new genotypes of cholera toxin (CT) and novel combinations of ctxB and rstR alleles resulting in variant CTX prophages. One of the new genotypes of ctxB, which first appeared in 1996 with the ...
journal_title:FEMS microbiology letters
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journal_title:FEMS microbiology letters
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journal_title:FEMS microbiology letters
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journal_title:FEMS microbiology letters
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