Protein secretion in Pseudomonas aeruginosa: the xcpA gene encodes an integral inner membrane protein homologous to Klebsiella pneumoniae secretion function protein PulO.
AUTOR(ES)
Bally, M
RESUMO
xcp mutations have pleiotropic effects on the secretion of proteins in Pseudomonas aeruginosa PAO. The nucleotide sequence of a 1.2-kb DNA fragment that complements the xcp-1 mutation has been determined. Sequence analysis shows the xcpA gene product to be a 31.8-kDa polypeptide, with a highly hydrophobic character. This is consistent with a localization in the cytoplasmic membrane in P. aeruginosa, determined after specific expression of the xcpA gene under control of the T7 phi 10 promoter. A very strong homology was found between XcpA and PulO, a membrane protein required for pullulanase secretion in Klebsiella pneumoniae. This suggests the existence of a signal sequence-dependent secretion process common to these two unrelated gram-negative bacteria.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=207036Documentos Relacionados
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