Abstract：
:Among proteins specifically found in most gram-positive bacteria of the phylum Firmicutes, conserved proteins of the family pfam06177-DUF988-COG4708 are of unknown function. The citrulline cluster-linked (ccl) gene of Lactobacillus plantarum codes one such protein and is adjacent to the citrulline biosynthesis operon argCJBDF, a situation also found in Lactococcus lactis. This gene is well conserved among L. plantarum species, and 1 isolate out of 24 harbored two ccl copies. Northern hybridization with a ccl probe revealed two arginine-repressed transcripts with sizes corresponding to the predicted argCJBDF-ccl operon and the ccl gene alone. Transcription start sites of both transcripts were characterized. Four different 5' ends were mapped at the argF-ccl intergenic region, resulting from either regulated transcription initiation or maturation of the transcripts. Transcriptional ccl-gusA gene fusion confirmed the promoter activity of the argF-ccl intergenic region. Thus, the ccl gene is arginine-repressed and transcribed both monocistronically and polycistronically in the argCJBDF-ccl operon. The ccl gene is not essential in L. plantarum, because a ccl gene deletion was obtained in strain CCM 1904. Although no functions were found in the tested laboratory conditions, the Ccl-like proteins may play a role in environmental conditions of life.
journal_name
Arch Microbioljournal_title
Archives of microbiologyauthors
Arsène-Ploetze F,Nicoloff H,Bringel Fdoi
10.1007/s00203-005-0774-9keywords:
subject
Has Abstractpub_date
2005-08-01 00:00:00pages
307-16issue
5eissn
0302-8933issn
1432-072Xjournal_volume
183pub_type
杂志文章abstract：:Mangrove sediment-associated bacteria are of significantly important in the field of medicine and pharmaceuticals as new promising sources of biologically active pharmacophores due to the extreme conditions, such as high salt concentration and soil anoxia. The sediment bacteria associated with Acanthus ilicifolius and...
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journal_title：Archives of microbiology
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更新日期：2011-02-01 00:00:00
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journal_title：Archives of microbiology
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更新日期：1976-06-01 00:00:00
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journal_title：Archives of microbiology
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更新日期：2009-04-01 00:00:00
