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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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The lipA gene of Serratia marcescens which encodes an extracellular lipase having no N-terminal signal peptide.

The lipA gene encoding an extracellular lipase was cloned from the wild-type strain of Serratia marcescens Sr41. Nucleotide sequencing showed a major open reading frame encoding a 64.9-kDa protein of 613 amino acid residues; the deduced amino acid sequence contains a lipase consensus sequence, GXSXG. The lipase had 66 and 56% homologies with the lipases of Pseudomonas fluorescens B52 and P. fluorescens SIK W1, respectively, but did not show any overall homology with lipases from other origins. The Escherichia coli cells carrying the S. marcescens lipA gene did not secrete the lipase into the medium. The S. marcescens lipase had no conventional N-terminal signal sequence but was also not subjected to any processing at both the N-terminal and C-terminal regions. A specific short region similar to the regions of secretory proteins having no N-terminal signal peptide was observed in the amino acid sequence. Expression of the lipA gene in S. marcescens was affected by the carbon source and the addition of Tween 80.[1]

References

  1. The lipA gene of Serratia marcescens which encodes an extracellular lipase having no N-terminal signal peptide. Akatsuka, H., Kawai, E., Omori, K., Komatsubara, S., Shibatani, T., Tosa, T. J. Bacteriol. (1994) [Pubmed]
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