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. 1987 Oct;169(10):4532–4539. doi: 10.1128/jb.169.10.4532-4539.1987

Activation of an elastase precursor by the lasA gene product of Pseudomonas aeruginosa.

J B Goldberg 1, D E Ohman 1
PMCID: PMC213818  PMID: 2820931

Abstract

To study the role of the lasA gene product in the secretion of enzymatically active elastase by Pseudomonas aeruginosa, we constructed mutants by gene replacement with in vitro-derived insertion and deletion mutations in the cloned lasA gene. lasA mutants were deficient in the production of elastolytic activity. A membrane-associated, higher-molecular-weight (approximately 47,000) precursor of elastase was observed in both the wild-type and the lasA mutants. Unlike the wild-type strain, the lasA mutant accumulated the 47,000-molecular weight elastase species in the soluble fraction of the cell, suggesting that the lasA gene product has a role in elastase secretion. Although lasA mutants were deficient in elastolytic activity, they produced a proelastase with a mature molecular weight (approximately 37,000) that still retained general proteolytic activity. Final yields of elastase-related material were approximately the same in both the wild-type strain and lasA mutant supernatants. The lasA gene was expressed in Escherichia coli, and the approximate molecular weight of the lasA gene product was 31,000. Extracts of E. coli containing the lasA gene product were shown in vitro to activate the proelastase produced by P. aeruginosa lasA mutants to an enzyme with elastolytic activity. Thus the lasA gene product has a direct effect on broadening the substrate specificity of secreted proelastase, as well as a second role (direct or indirect) in the secretion of elastase.

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Selected References

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  1. Bennett P. M., Grinsted J., Choi C. L., Richmond M. H. Characterisation of Tn501, a transposon determining resistance to mercuric ions. Mol Gen Genet. 1978 Feb 7;159(1):101–106. doi: 10.1007/BF00401753. [DOI] [PubMed] [Google Scholar]
  2. Birnboim H. C., Doly J. A rapid alkaline extraction procedure for screening recombinant plasmid DNA. Nucleic Acids Res. 1979 Nov 24;7(6):1513–1523. doi: 10.1093/nar/7.6.1513. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Boyer H. W., Roulland-Dussoix D. A complementation analysis of the restriction and modification of DNA in Escherichia coli. J Mol Biol. 1969 May 14;41(3):459–472. doi: 10.1016/0022-2836(69)90288-5. [DOI] [PubMed] [Google Scholar]
  4. Bradford M. M. A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding. Anal Biochem. 1976 May 7;72:248–254. doi: 10.1016/0003-2697(76)90527-3. [DOI] [PubMed] [Google Scholar]
  5. Bryan L. E., Nicas T., Holloway B. W., Crowther C. Aminoglycoside-resistant mutation of Pseudomonas aeruginosa defective in cytochrome c552 and nitrate reductase. Antimicrob Agents Chemother. 1980 Jan;17(1):71–79. doi: 10.1128/aac.17.1.71. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Burnette W. N. "Western blotting": electrophoretic transfer of proteins from sodium dodecyl sulfate--polyacrylamide gels to unmodified nitrocellulose and radiographic detection with antibody and radioiodinated protein A. Anal Biochem. 1981 Apr;112(2):195–203. doi: 10.1016/0003-2697(81)90281-5. [DOI] [PubMed] [Google Scholar]
  7. Casadaban M. J., Cohen S. N. Analysis of gene control signals by DNA fusion and cloning in Escherichia coli. J Mol Biol. 1980 Apr;138(2):179–207. doi: 10.1016/0022-2836(80)90283-1. [DOI] [PubMed] [Google Scholar]
  8. Cheng K. J., Ingram J. M., Costerton J. W. Interactions of alkaline phosphatase and the cell wall of Pseudomonas aeruginosa. J Bacteriol. 1971 Jul;107(1):325–336. doi: 10.1128/jb.107.1.325-336.1971. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Cheng K. J., Ingram J. M., Costerton J. W. Release of alkaline phosphatase from cells of Pseudomonas aeruginosa by manipulation of cation concentration and of pH. J Bacteriol. 1970 Nov;104(2):748–753. doi: 10.1128/jb.104.2.748-753.1970. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Cohen S. N., Chang A. C., Hsu L. Nonchromosomal antibiotic resistance in bacteria: genetic transformation of Escherichia coli by R-factor DNA. Proc Natl Acad Sci U S A. 1972 Aug;69(8):2110–2114. doi: 10.1073/pnas.69.8.2110. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Fecycz I. T., Campbell J. N. Mechanisms of activation and secretion of a cell-associated precursor of an exocellular protease of Pseudomonas aeruginosa 34362A. Eur J Biochem. 1985 Jan 2;146(1):35–42. doi: 10.1111/j.1432-1033.1985.tb08616.x. [DOI] [PubMed] [Google Scholar]
  12. Figurski D. H., Helinski D. R. Replication of an origin-containing derivative of plasmid RK2 dependent on a plasmid function provided in trans. Proc Natl Acad Sci U S A. 1979 Apr;76(4):1648–1652. doi: 10.1073/pnas.76.4.1648. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Friedman A. M., Long S. R., Brown S. E., Buikema W. J., Ausubel F. M. Construction of a broad host range cosmid cloning vector and its use in the genetic analysis of Rhizobium mutants. Gene. 1982 Jun;18(3):289–296. doi: 10.1016/0378-1119(82)90167-6. [DOI] [PubMed] [Google Scholar]
  14. Goldberg J. B., Ohman D. E. Cloning and expression in Pseudomonas aeruginosa of a gene involved in the production of alginate. J Bacteriol. 1984 Jun;158(3):1115–1121. doi: 10.1128/jb.158.3.1115-1121.1984. [DOI] [PMC free article] [PubMed] [Google Scholar]
  15. Goldberg J. B., Ohman D. E. Cloning and transcriptional regulation of the elastase lasA gene in mucoid and nonmucoid Pseudomonas aeruginosa. J Bacteriol. 1987 Mar;169(3):1349–1351. doi: 10.1128/jb.169.3.1349-1351.1987. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Hancock R. E., Nikaido H. Outer membranes of gram-negative bacteria. XIX. Isolation from Pseudomonas aeruginosa PAO1 and use in reconstitution and definition of the permeability barrier. J Bacteriol. 1978 Oct;136(1):381–390. doi: 10.1128/jb.136.1.381-390.1978. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. Holloway B. W., Krishnapillai V., Morgan A. F. Chromosomal genetics of Pseudomonas. Microbiol Rev. 1979 Mar;43(1):73–102. doi: 10.1128/mr.43.1.73-102.1979. [DOI] [PMC free article] [PubMed] [Google Scholar]
  18. Howe T. R., Wretlind B., Iglewski B. H. Comparison of two methods of genetic exchange in determination of the genetic locus of the structural gene for Pseudomonas aeruginosa elastase. J Bacteriol. 1983 Oct;156(1):58–61. doi: 10.1128/jb.156.1.58-61.1983. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. Jensen S. E., Fecycz I. T., Stemke G. W., Campbell J. N. Demonstration of a cell-associated, inactive precursor of an exocellular protease produced by Pseudomonas aeruginosa. Can J Microbiol. 1980 Jan;26(1):87–93. doi: 10.1139/m80-013. [DOI] [PubMed] [Google Scholar]
  20. Johnston S., Lee J. H., Ray D. S. High-level expression of M13 gene II protein from an inducible polycistronic messenger RNA. Gene. 1985;34(2-3):137–145. doi: 10.1016/0378-1119(85)90121-0. [DOI] [PubMed] [Google Scholar]
  21. Krishnapillai V. A novel transducing phage. Its role in recognition of a possible new host-controlled modification system in Pseudomonas aeruginosa. Mol Gen Genet. 1972;114(2):134–143. doi: 10.1007/BF00332784. [DOI] [PubMed] [Google Scholar]
  22. Liu P. V. Extracellular toxins of Pseudomonas aeruginosa. J Infect Dis. 1974 Nov;130 (Suppl)(0):S94–S99. doi: 10.1093/infdis/130.supplement.s94. [DOI] [PubMed] [Google Scholar]
  23. Lory S., Tai P. C., Davis B. D. Mechanism of protein excretion by gram-negative bacteria: Pseudomonas aeruginosa exotoxin A. J Bacteriol. 1983 Nov;156(2):695–702. doi: 10.1128/jb.156.2.695-702.1983. [DOI] [PMC free article] [PubMed] [Google Scholar]
  24. Lugtenberg B., Meijers J., Peters R., van der Hoek P., van Alphen L. Electrophoretic resolution of the "major outer membrane protein" of Escherichia coli K12 into four bands. FEBS Lett. 1975 Oct 15;58(1):254–258. doi: 10.1016/0014-5793(75)80272-9. [DOI] [PubMed] [Google Scholar]
  25. MORIHARA K., TSUZUKI H., OKA T., INOUE H., EBATA M. PSEUDOMONAS AERUGINOSA ELASTASE. ISOLATION, CRYSTALLIZATION, AND PRELIMINARY CHARACTERIZATION. J Biol Chem. 1965 Aug;240:3295–3304. [PubMed] [Google Scholar]
  26. Ohman D. E., Chakrabarty A. M. Genetic mapping of chromosomal determinants for the production of the exopolysaccharide alginate in a Pseudomonas aeruginosa cystic fibrosis isolate. Infect Immun. 1981 Jul;33(1):142–148. doi: 10.1128/iai.33.1.142-148.1981. [DOI] [PMC free article] [PubMed] [Google Scholar]
  27. Ohman D. E., Chakrabarty A. M. Utilization of human respiratory secretions by mucoid Pseudomonas aeruginosa of cystic fibrosis origin. Infect Immun. 1982 Aug;37(2):662–669. doi: 10.1128/iai.37.2.662-669.1982. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Ohman D. E., Cryz S. J., Iglewski B. H. Isolation and characterization of Pseudomonas aeruginosa PAO mutant that produces altered elastase. J Bacteriol. 1980 Jun;142(3):836–842. doi: 10.1128/jb.142.3.836-842.1980. [DOI] [PMC free article] [PubMed] [Google Scholar]
  29. Ohman D. E., West M. A., Flynn J. L., Goldberg J. B. Method for gene replacement in Pseudomonas aeruginosa used in construction of recA mutants: recA-independent instability of alginate production. J Bacteriol. 1985 Jun;162(3):1068–1074. doi: 10.1128/jb.162.3.1068-1074.1985. [DOI] [PMC free article] [PubMed] [Google Scholar]
  30. Oka A., Sugisaki H., Takanami M. Nucleotide sequence of the kanamycin resistance transposon Tn903. J Mol Biol. 1981 Apr 5;147(2):217–226. doi: 10.1016/0022-2836(81)90438-1. [DOI] [PubMed] [Google Scholar]
  31. Sokol P. A., Ohman D. E., Iglewski B. H. A more sensitive plate assay for detection of protease production by Pseudomanas aeruginosa. J Clin Microbiol. 1979 Apr;9(4):538–540. doi: 10.1128/jcm.9.4.538-540.1979. [DOI] [PMC free article] [PubMed] [Google Scholar]
  32. Southern E. M. Detection of specific sequences among DNA fragments separated by gel electrophoresis. J Mol Biol. 1975 Nov 5;98(3):503–517. doi: 10.1016/s0022-2836(75)80083-0. [DOI] [PubMed] [Google Scholar]
  33. Stahl M. L., Ferrari E. Replacement of the Bacillus subtilis subtilisin structural gene with an In vitro-derived deletion mutation. J Bacteriol. 1984 May;158(2):411–418. doi: 10.1128/jb.158.2.411-418.1984. [DOI] [PMC free article] [PubMed] [Google Scholar]
  34. VOGEL H. J., BONNER D. M. Acetylornithinase of Escherichia coli: partial purification and some properties. J Biol Chem. 1956 Jan;218(1):97–106. [PubMed] [Google Scholar]
  35. Vasantha N., Thompson L. D., Rhodes C., Banner C., Nagle J., Filpula D. Genes for alkaline protease and neutral protease from Bacillus amyloliquefaciens contain a large open reading frame between the regions coding for signal sequence and mature protein. J Bacteriol. 1984 Sep;159(3):811–819. doi: 10.1128/jb.159.3.811-819.1984. [DOI] [PMC free article] [PubMed] [Google Scholar]
  36. Vieira J., Messing J. The pUC plasmids, an M13mp7-derived system for insertion mutagenesis and sequencing with synthetic universal primers. Gene. 1982 Oct;19(3):259–268. doi: 10.1016/0378-1119(82)90015-4. [DOI] [PubMed] [Google Scholar]
  37. Way J. C., Davis M. A., Morisato D., Roberts D. E., Kleckner N. New Tn10 derivatives for transposon mutagenesis and for construction of lacZ operon fusions by transposition. Gene. 1984 Dec;32(3):369–379. doi: 10.1016/0378-1119(84)90012-x. [DOI] [PubMed] [Google Scholar]
  38. Wretlind B., Pavlovskis O. R. Genetic mapping and characterization of Pseudomonas aeruginosa mutants defective in the formation of extracellular proteins. J Bacteriol. 1984 Jun;158(3):801–808. doi: 10.1128/jb.158.3.801-808.1984. [DOI] [PMC free article] [PubMed] [Google Scholar]
  39. Wretlind B., Sjöberg L., Wadström T. Protease-deficient mutants of Pseudomonas aeruginosa: pleiotropic changes in activity of other extracellular enzymes. J Gen Microbiol. 1977 Dec;103(2):329–336. doi: 10.1099/00221287-103-2-329. [DOI] [PubMed] [Google Scholar]
  40. Wretlind B., Wadström T. Purification and properties of a protease with elastase activity from Pseudomonas aeruginosa. J Gen Microbiol. 1977 Dec;103(2):319–327. doi: 10.1099/00221287-103-2-319. [DOI] [PubMed] [Google Scholar]
  41. Yang M. Y., Ferrari E., Henner D. J. Cloning of the neutral protease gene of Bacillus subtilis and the use of the cloned gene to create an in vitro-derived deletion mutation. J Bacteriol. 1984 Oct;160(1):15–21. doi: 10.1128/jb.160.1.15-21.1984. [DOI] [PMC free article] [PubMed] [Google Scholar]

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