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. 1992 Oct 2;119(2):287–299. doi: 10.1083/jcb.119.2.287

Aminopeptidase I of Saccharomyces cerevisiae is localized to the vacuole independent of the secretory pathway

PMCID: PMC2289658  PMID: 1400574

Abstract

The Saccharomyces cerevisiae APE1 gene product, aminopeptidase I (API), is a soluble hydrolase that has been shown to be localized to the vacuole. API lacks a standard signal sequence and contains an unusual amino-terminal propeptide. We have examined the biosynthesis of API in order to elucidate the mechanism of its delivery to the vacuole. API is synthesized as an inactive precursor that is matured in a PEP4- dependent manner. The half-time for processing is approximately 45 min. The API precursor remains in the cytoplasm after synthesis and does not enter the secretory pathway. The precursor does not receive glycosyl modifications, and removal of its propeptide occurs in a sec- independent manner. Neither the precursor nor mature form of API are secreted into the extracellular fraction in vps mutants or upon overproduction, two additional characteristics of soluble vacuolar proteins that transit through the secretory pathway. Overproduction of API results in both an increase in the half-time of processing and the stable accumulation of precursor protein. These results suggest that API enters the vacuole by a posttranslational process not used by most previously studied resident vacuolar proteins and will be a useful model protein to analyze this alternative mechanism of vacuolar localization.

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Selected References

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  1. Baker D., Hicke L., Rexach M., Schleyer M., Schekman R. Reconstitution of SEC gene product-dependent intercompartmental protein transport. Cell. 1988 Jul 29;54(3):335–344. doi: 10.1016/0092-8674(88)90196-1. [DOI] [PubMed] [Google Scholar]
  2. Bankaitis V. A., Johnson L. M., Emr S. D. Isolation of yeast mutants defective in protein targeting to the vacuole. Proc Natl Acad Sci U S A. 1986 Dec;83(23):9075–9079. doi: 10.1073/pnas.83.23.9075. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Banta L. M., Robinson J. S., Klionsky D. J., Emr S. D. Organelle assembly in yeast: characterization of yeast mutants defective in vacuolar biogenesis and protein sorting. J Cell Biol. 1988 Oct;107(4):1369–1383. doi: 10.1083/jcb.107.4.1369. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Bole D. G., Hendershot L. M., Kearney J. F. Posttranslational association of immunoglobulin heavy chain binding protein with nascent heavy chains in nonsecreting and secreting hybridomas. J Cell Biol. 1986 May;102(5):1558–1566. doi: 10.1083/jcb.102.5.1558. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Chang Y. H., Smith J. A. Molecular cloning and sequencing of genomic DNA encoding aminopeptidase I from Saccharomyces cerevisiae. J Biol Chem. 1989 Apr 25;264(12):6979–6983. [PubMed] [Google Scholar]
  6. Chiang H. L., Dice J. F. Peptide sequences that target proteins for enhanced degradation during serum withdrawal. J Biol Chem. 1988 May 15;263(14):6797–6805. [PubMed] [Google Scholar]
  7. Chiang H. L., Schekman R. Regulated import and degradation of a cytosolic protein in the yeast vacuole. Nature. 1991 Mar 28;350(6316):313–318. doi: 10.1038/350313a0. [DOI] [PubMed] [Google Scholar]
  8. Chiang H. L., Terlecky S. R., Plant C. P., Dice J. F. A role for a 70-kilodalton heat shock protein in lysosomal degradation of intracellular proteins. Science. 1989 Oct 20;246(4928):382–385. doi: 10.1126/science.2799391. [DOI] [PubMed] [Google Scholar]
  9. Chvatchko Y., Howald I., Riezman H. Two yeast mutants defective in endocytosis are defective in pheromone response. Cell. 1986 Aug 1;46(3):355–364. doi: 10.1016/0092-8674(86)90656-2. [DOI] [PubMed] [Google Scholar]
  10. Cueva R., García-Alvarez N., Suárez-Rendueles P. Yeast vacuolar aminopeptidase yscI. Isolation and regulation of the APE1 (LAP4) structural gene. FEBS Lett. 1989 Dec 18;259(1):125–129. doi: 10.1016/0014-5793(89)81510-8. [DOI] [PubMed] [Google Scholar]
  11. DAVIS B. J. DISC ELECTROPHORESIS. II. METHOD AND APPLICATION TO HUMAN SERUM PROTEINS. Ann N Y Acad Sci. 1964 Dec 28;121:404–427. doi: 10.1111/j.1749-6632.1964.tb14213.x. [DOI] [PubMed] [Google Scholar]
  12. Deshaies R. J., Koch B. D., Werner-Washburne M., Craig E. A., Schekman R. A subfamily of stress proteins facilitates translocation of secretory and mitochondrial precursor polypeptides. Nature. 1988 Apr 28;332(6167):800–805. doi: 10.1038/332800a0. [DOI] [PubMed] [Google Scholar]
  13. Deshaies R. J., Schekman R. A yeast mutant defective at an early stage in import of secretory protein precursors into the endoplasmic reticulum. J Cell Biol. 1987 Aug;105(2):633–645. doi: 10.1083/jcb.105.2.633. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Dice J. F. Molecular determinants of protein half-lives in eukaryotic cells. FASEB J. 1987 Nov;1(5):349–357. doi: 10.1096/fasebj.1.5.2824267. [DOI] [PubMed] [Google Scholar]
  15. Distel B., Al E. J., Tabak H. F., Jones E. W. Synthesis and maturation of the yeast vacuolar enzymes carboxypeptidase Y and aminopeptidase I. Biochim Biophys Acta. 1983 Oct 13;741(1):128–135. doi: 10.1016/0167-4781(83)90019-2. [DOI] [PubMed] [Google Scholar]
  16. Dürr M., Boller T., Wiemken A. Polybase induced lysis of yeast spheroplasts. A new gentle method for preparation of vacuoles. Arch Microbiol. 1975 Nov 7;105(3):319–327. doi: 10.1007/BF00447152. [DOI] [PubMed] [Google Scholar]
  17. Ellis J. Proteins as molecular chaperones. 1987 Jul 30-Aug 5Nature. 328(6129):378–379. doi: 10.1038/328378a0. [DOI] [PubMed] [Google Scholar]
  18. Ellis R. J., van der Vies S. M. Molecular chaperones. Annu Rev Biochem. 1991;60:321–347. doi: 10.1146/annurev.bi.60.070191.001541. [DOI] [PubMed] [Google Scholar]
  19. Emr S. D., Schekman R., Flessel M. C., Thorner J. An MF alpha 1-SUC2 (alpha-factor-invertase) gene fusion for study of protein localization and gene expression in yeast. Proc Natl Acad Sci U S A. 1983 Dec;80(23):7080–7084. doi: 10.1073/pnas.80.23.7080. [DOI] [PMC free article] [PubMed] [Google Scholar]
  20. Esmon B., Novick P., Schekman R. Compartmentalized assembly of oligosaccharides on exported glycoproteins in yeast. Cell. 1981 Aug;25(2):451–460. doi: 10.1016/0092-8674(81)90063-5. [DOI] [PubMed] [Google Scholar]
  21. Frey J., Röhm K. H. Subcellular localization and levels of aminopeptidases and dipeptidase in Saccharomyces cerevisiae. Biochim Biophys Acta. 1978 Nov 10;527(1):31–41. doi: 10.1016/0005-2744(78)90253-x. [DOI] [PubMed] [Google Scholar]
  22. Funaguma T., Toyoda Y., Sy J. Catabolite inactivation of fructose 1,6-bisphosphatase and cytoplasmic malate dehydrogenase in yeast. Biochem Biophys Res Commun. 1985 Jul 16;130(1):467–471. doi: 10.1016/0006-291x(85)90440-1. [DOI] [PubMed] [Google Scholar]
  23. García-Alvarez N., Cueva R., Suárez-Rendueles P. Molecular cloning of soluble aminopeptidases from Saccharomyces cerevisiae. Sequence analysis of aminopeptidase yscII, a putative zinc-metallopeptidase. Eur J Biochem. 1991 Dec 18;202(3):993–1002. doi: 10.1111/j.1432-1033.1991.tb16461.x. [DOI] [PubMed] [Google Scholar]
  24. Graham T. R., Emr S. D. Compartmental organization of Golgi-specific protein modification and vacuolar protein sorting events defined in a yeast sec18 (NSF) mutant. J Cell Biol. 1991 Jul;114(2):207–218. doi: 10.1083/jcb.114.2.207. [DOI] [PMC free article] [PubMed] [Google Scholar]
  25. Griffiths G., Simons K. The trans Golgi network: sorting at the exit site of the Golgi complex. Science. 1986 Oct 24;234(4775):438–443. doi: 10.1126/science.2945253. [DOI] [PubMed] [Google Scholar]
  26. Hasilik A., Tanner W. Biosynthesis of the vacuolar yeast glycoprotein carboxypeptidase Y. Conversion of precursor into the enzyme. Eur J Biochem. 1978 Apr 17;85(2):599–608. doi: 10.1111/j.1432-1033.1978.tb12275.x. [DOI] [PubMed] [Google Scholar]
  27. Hasilik A., Tanner W. Carbohydrate moiety of carboxypeptidase Y and perturbation of its biosynthesis. Eur J Biochem. 1978 Nov 15;91(2):567–575. doi: 10.1111/j.1432-1033.1978.tb12710.x. [DOI] [PubMed] [Google Scholar]
  28. Hemmings B. A., Zubenko G. S., Hasilik A., Jones E. W. Mutant defective in processing of an enzyme located in the lysosome-like vacuole of Saccharomyces cerevisiae. Proc Natl Acad Sci U S A. 1981 Jan;78(1):435–439. doi: 10.1073/pnas.78.1.435. [DOI] [PMC free article] [PubMed] [Google Scholar]
  29. Herman P. K., Stack J. H., Emr S. D. A genetic and structural analysis of the yeast Vps15 protein kinase: evidence for a direct role of Vps15p in vacuolar protein delivery. EMBO J. 1991 Dec;10(13):4049–4060. doi: 10.1002/j.1460-2075.1991.tb04981.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  30. Hirsch H. H., Suárez Rendueles P., Achstetter T., Wolf D. H. Aminopeptidase yscII of yeast. Isolation of mutants and their biochemical and genetic analysis. Eur J Biochem. 1988 May 2;173(3):589–598. doi: 10.1111/j.1432-1033.1988.tb14040.x. [DOI] [PubMed] [Google Scholar]
  31. Jenness D. D., Spatrick P. Down regulation of the alpha-factor pheromone receptor in S. cerevisiae. Cell. 1986 Aug 1;46(3):345–353. doi: 10.1016/0092-8674(86)90655-0. [DOI] [PubMed] [Google Scholar]
  32. Johnson L. M., Bankaitis V. A., Emr S. D. Distinct sequence determinants direct intracellular sorting and modification of a yeast vacuolar protease. Cell. 1987 Mar 13;48(5):875–885. doi: 10.1016/0092-8674(87)90084-5. [DOI] [PubMed] [Google Scholar]
  33. Johnston M., Davis R. W. Sequences that regulate the divergent GAL1-GAL10 promoter in Saccharomyces cerevisiae. Mol Cell Biol. 1984 Aug;4(8):1440–1448. doi: 10.1128/mcb.4.8.1440. [DOI] [PMC free article] [PubMed] [Google Scholar]
  34. Jones E. W. The synthesis and function of proteases in Saccharomyces: genetic approaches. Annu Rev Genet. 1984;18:233–270. doi: 10.1146/annurev.ge.18.120184.001313. [DOI] [PubMed] [Google Scholar]
  35. Kaiser C. A., Schekman R. Distinct sets of SEC genes govern transport vesicle formation and fusion early in the secretory pathway. Cell. 1990 May 18;61(4):723–733. doi: 10.1016/0092-8674(90)90483-u. [DOI] [PubMed] [Google Scholar]
  36. Klionsky D. J., Banta L. M., Emr S. D. Intracellular sorting and processing of a yeast vacuolar hydrolase: proteinase A propeptide contains vacuolar targeting information. Mol Cell Biol. 1988 May;8(5):2105–2116. doi: 10.1128/mcb.8.5.2105. [DOI] [PMC free article] [PubMed] [Google Scholar]
  37. Klionsky D. J., Emr S. D. A new class of lysosomal/vacuolar protein sorting signals. J Biol Chem. 1990 Apr 5;265(10):5349–5352. [PubMed] [Google Scholar]
  38. Klionsky D. J., Emr S. D. Membrane protein sorting: biosynthesis, transport and processing of yeast vacuolar alkaline phosphatase. EMBO J. 1989 Aug;8(8):2241–2250. doi: 10.1002/j.1460-2075.1989.tb08348.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  39. Klionsky D. J., Herman P. K., Emr S. D. The fungal vacuole: composition, function, and biogenesis. Microbiol Rev. 1990 Sep;54(3):266–292. doi: 10.1128/mr.54.3.266-292.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
  40. Klionsky D. J., Nelson H., Nelson N. Compartment acidification is required for efficient sorting of proteins to the vacuole in Saccharomyces cerevisiae. J Biol Chem. 1992 Feb 15;267(5):3416–3422. [PubMed] [Google Scholar]
  41. Kumamoto C. A. Molecular chaperones and protein translocation across the Escherichia coli inner membrane. Mol Microbiol. 1991 Jan;5(1):19–22. doi: 10.1111/j.1365-2958.1991.tb01821.x. [DOI] [PubMed] [Google Scholar]
  42. Kuranda M. J., Robbins P. W. Cloning and heterologous expression of glycosidase genes from Saccharomyces cerevisiae. Proc Natl Acad Sci U S A. 1987 May;84(9):2585–2589. doi: 10.1073/pnas.84.9.2585. [DOI] [PMC free article] [PubMed] [Google Scholar]
  43. Melton D. A., Krieg P. A., Rebagliati M. R., Maniatis T., Zinn K., Green M. R. Efficient in vitro synthesis of biologically active RNA and RNA hybridization probes from plasmids containing a bacteriophage SP6 promoter. Nucleic Acids Res. 1984 Sep 25;12(18):7035–7056. doi: 10.1093/nar/12.18.7035. [DOI] [PMC free article] [PubMed] [Google Scholar]
  44. Metz G., Röhm K. H. Yeast aminopeptidase I. Chemical composition and catalytic properties. Biochim Biophys Acta. 1976 May 13;429(3):933–949. doi: 10.1016/0005-2744(76)90338-7. [DOI] [PubMed] [Google Scholar]
  45. Moehle C. M., Dixon C. K., Jones E. W. Processing pathway for protease B of Saccharomyces cerevisiae. J Cell Biol. 1989 Feb;108(2):309–325. doi: 10.1083/jcb.108.2.309. [DOI] [PMC free article] [PubMed] [Google Scholar]
  46. Moehle C. M., Tizard R., Lemmon S. K., Smart J., Jones E. W. Protease B of the lysosomelike vacuole of the yeast Saccharomyces cerevisiae is homologous to the subtilisin family of serine proteases. Mol Cell Biol. 1987 Dec;7(12):4390–4399. doi: 10.1128/mcb.7.12.4390. [DOI] [PMC free article] [PubMed] [Google Scholar]
  47. Munro S., Pelham H. R. An Hsp70-like protein in the ER: identity with the 78 kd glucose-regulated protein and immunoglobulin heavy chain binding protein. Cell. 1986 Jul 18;46(2):291–300. doi: 10.1016/0092-8674(86)90746-4. [DOI] [PubMed] [Google Scholar]
  48. Nasmyth K. A., Tatchell K. The structure of transposable yeast mating type loci. Cell. 1980 Mar;19(3):753–764. doi: 10.1016/s0092-8674(80)80051-1. [DOI] [PubMed] [Google Scholar]
  49. Novick P., Ferro S., Schekman R. Order of events in the yeast secretory pathway. Cell. 1981 Aug;25(2):461–469. doi: 10.1016/0092-8674(81)90064-7. [DOI] [PubMed] [Google Scholar]
  50. Novick P., Field C., Schekman R. Identification of 23 complementation groups required for post-translational events in the yeast secretory pathway. Cell. 1980 Aug;21(1):205–215. doi: 10.1016/0092-8674(80)90128-2. [DOI] [PubMed] [Google Scholar]
  51. Ostermann J., Horwich A. L., Neupert W., Hartl F. U. Protein folding in mitochondria requires complex formation with hsp60 and ATP hydrolysis. Nature. 1989 Sep 14;341(6238):125–130. doi: 10.1038/341125a0. [DOI] [PubMed] [Google Scholar]
  52. Payne G. S., Baker D., van Tuinen E., Schekman R. Protein transport to the vacuole and receptor-mediated endocytosis by clathrin heavy chain-deficient yeast. J Cell Biol. 1988 May;106(5):1453–1461. doi: 10.1083/jcb.106.5.1453. [DOI] [PMC free article] [PubMed] [Google Scholar]
  53. Pfeffer S. R., Rothman J. E. Biosynthetic protein transport and sorting by the endoplasmic reticulum and Golgi. Annu Rev Biochem. 1987;56:829–852. doi: 10.1146/annurev.bi.56.070187.004145. [DOI] [PubMed] [Google Scholar]
  54. Randall L. L., Hardy S. J. Correlation of competence for export with lack of tertiary structure of the mature species: a study in vivo of maltose-binding protein in E. coli. Cell. 1986 Sep 12;46(6):921–928. doi: 10.1016/0092-8674(86)90074-7. [DOI] [PubMed] [Google Scholar]
  55. Rexach M. F., Schekman R. W. Distinct biochemical requirements for the budding, targeting, and fusion of ER-derived transport vesicles. J Cell Biol. 1991 Jul;114(2):219–229. doi: 10.1083/jcb.114.2.219. [DOI] [PMC free article] [PubMed] [Google Scholar]
  56. Robinson J. S., Klionsky D. J., Banta L. M., Emr S. D. Protein sorting in Saccharomyces cerevisiae: isolation of mutants defective in the delivery and processing of multiple vacuolar hydrolases. Mol Cell Biol. 1988 Nov;8(11):4936–4948. doi: 10.1128/mcb.8.11.4936. [DOI] [PMC free article] [PubMed] [Google Scholar]
  57. Rothman J. E. Polypeptide chain binding proteins: catalysts of protein folding and related processes in cells. Cell. 1989 Nov 17;59(4):591–601. doi: 10.1016/0092-8674(89)90005-6. [DOI] [PubMed] [Google Scholar]
  58. Rothman J. H., Howald I., Stevens T. H. Characterization of genes required for protein sorting and vacuolar function in the yeast Saccharomyces cerevisiae. EMBO J. 1989 Jul;8(7):2057–2065. doi: 10.1002/j.1460-2075.1989.tb03614.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  59. Rothman J. H., Hunter C. P., Valls L. A., Stevens T. H. Overproduction-induced mislocalization of a yeast vacuolar protein allows isolation of its structural gene. Proc Natl Acad Sci U S A. 1986 May;83(10):3248–3252. doi: 10.1073/pnas.83.10.3248. [DOI] [PMC free article] [PubMed] [Google Scholar]
  60. Rothman J. H., Stevens T. H. Protein sorting in yeast: mutants defective in vacuole biogenesis mislocalize vacuolar proteins into the late secretory pathway. Cell. 1986 Dec 26;47(6):1041–1051. doi: 10.1016/0092-8674(86)90819-6. [DOI] [PubMed] [Google Scholar]
  61. Schauer I., Emr S., Gross C., Schekman R. Invertase signal and mature sequence substitutions that delay intercompartmental transport of active enzyme. J Cell Biol. 1985 May;100(5):1664–1675. doi: 10.1083/jcb.100.5.1664. [DOI] [PMC free article] [PubMed] [Google Scholar]
  62. Schlesinger M. J. Heat shock proteins. J Biol Chem. 1990 Jul 25;265(21):12111–12114. [PubMed] [Google Scholar]
  63. Singer B., Riezman H. Detection of an intermediate compartment involved in transport of alpha-factor from the plasma membrane to the vacuole in yeast. J Cell Biol. 1990 Jun;110(6):1911–1922. doi: 10.1083/jcb.110.6.1911. [DOI] [PMC free article] [PubMed] [Google Scholar]
  64. Stevens T. H., Rothman J. H., Payne G. S., Schekman R. Gene dosage-dependent secretion of yeast vacuolar carboxypeptidase Y. J Cell Biol. 1986 May;102(5):1551–1557. doi: 10.1083/jcb.102.5.1551. [DOI] [PMC free article] [PubMed] [Google Scholar]
  65. Stevens T., Esmon B., Schekman R. Early stages in the yeast secretory pathway are required for transport of carboxypeptidase Y to the vacuole. Cell. 1982 Sep;30(2):439–448. doi: 10.1016/0092-8674(82)90241-0. [DOI] [PubMed] [Google Scholar]
  66. Theg S. M., Bauerle C., Olsen L. J., Selman B. R., Keegstra K. Internal ATP is the only energy requirement for the translocation of precursor proteins across chloroplastic membranes. J Biol Chem. 1989 Apr 25;264(12):6730–6736. [PubMed] [Google Scholar]
  67. Trumbly R. J., Bradley G. Isolation and characterization of aminopeptidase mutants of Saccharomyces cerevisiae. J Bacteriol. 1983 Oct;156(1):36–48. doi: 10.1128/jb.156.1.36-48.1983. [DOI] [PMC free article] [PubMed] [Google Scholar]
  68. Valls L. A., Hunter C. P., Rothman J. H., Stevens T. H. Protein sorting in yeast: the localization determinant of yeast vacuolar carboxypeptidase Y resides in the propeptide. Cell. 1987 Mar 13;48(5):887–897. doi: 10.1016/0092-8674(87)90085-7. [DOI] [PubMed] [Google Scholar]
  69. Yanisch-Perron C., Vieira J., Messing J. Improved M13 phage cloning vectors and host strains: nucleotide sequences of the M13mp18 and pUC19 vectors. Gene. 1985;33(1):103–119. doi: 10.1016/0378-1119(85)90120-9. [DOI] [PubMed] [Google Scholar]
  70. Yoshihisa T., Anraku Y. A novel pathway of import of alpha-mannosidase, a marker enzyme of vacuolar membrane, in Saccharomyces cerevisiae. J Biol Chem. 1990 Dec 25;265(36):22418–22425. [PubMed] [Google Scholar]
  71. Zeilstra-Ryalls J., Fayet O., Georgopoulos C. The universally conserved GroE (Hsp60) chaperonins. Annu Rev Microbiol. 1991;45:301–325. doi: 10.1146/annurev.mi.45.100191.001505. [DOI] [PubMed] [Google Scholar]
  72. Zubenko G. S., Park F. J., Jones E. W. Mutations in PEP4 locus of Saccharomyces cerevisiae block final step in maturation of two vacuolar hydrolases. Proc Natl Acad Sci U S A. 1983 Jan;80(2):510–514. doi: 10.1073/pnas.80.2.510. [DOI] [PMC free article] [PubMed] [Google Scholar]

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