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. 1991 May 1;113(3):527–538. doi: 10.1083/jcb.113.3.527

Immunolocalization of Kex2 protease identifies a putative late Golgi compartment in the yeast Saccharomyces cerevisiae

PMCID: PMC2288974  PMID: 2016334

Abstract

The Kex2 protein of the yeast Saccharomyces cerevisiae is a membrane- bound, Ca2(+)-dependent serine protease that cleaves the precursors of the mating pheromone alpha-factor and the M1 killer toxin at pairs of basic residues during their transport through the secretory pathway. To begin to characterize the intracellular locus of Kex2-dependent proteolytic processing, we have examined the subcellular distribution of Kex2 protein in yeast by indirect immunofluorescence. Kex2 protein is located at multiple, discrete sites within wild-type yeast cells (average, 3.0 +/- 1.7/mother cell). Qualitatively similar fluorescence patterns are observed at elevated levels of expression, but no signal is found in cells lacking the KEX2 gene. Structures containing Kex2 protein are not concentrated at a perinuclear location, but are distributed throughout the cytoplasm at all phases of the cell cycle. Kex2-containing structures appear in the bud at an early, premitotic stage. Analysis of conditional secretory (sec) mutants demonstrates that Kex2 protein ordinarily progresses from the ER to the Golgi but is not incorporated into secretory vesicles, consistent with the proposed localization of Kex2 protein to the yeast Golgi complex.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Brada D., Schekman R. Coincident localization of secretory and plasma membrane proteins in organelles of the yeast secretory pathway. J Bacteriol. 1988 Jun;170(6):2775–2783. doi: 10.1128/jb.170.6.2775-2783.1988. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Brodsky F. M. Living with clathrin: its role in intracellular membrane traffic. Science. 1988 Dec 9;242(4884):1396–1402. doi: 10.1126/science.2904698. [DOI] [PubMed] [Google Scholar]
  3. Burgers P. M., Percival K. J. Transformation of yeast spheroplasts without cell fusion. Anal Biochem. 1987 Jun;163(2):391–397. doi: 10.1016/0003-2697(87)90240-5. [DOI] [PubMed] [Google Scholar]
  4. Böhni P. C., Deshaies R. J., Schekman R. W. SEC11 is required for signal peptide processing and yeast cell growth. J Cell Biol. 1988 Apr;106(4):1035–1042. doi: 10.1083/jcb.106.4.1035. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Clary D. O., Griff I. C., Rothman J. E. SNAPs, a family of NSF attachment proteins involved in intracellular membrane fusion in animals and yeast. Cell. 1990 May 18;61(4):709–721. doi: 10.1016/0092-8674(90)90482-t. [DOI] [PubMed] [Google Scholar]
  6. Dunphy W. G., Rothman J. E. Compartmental organization of the Golgi stack. Cell. 1985 Aug;42(1):13–21. doi: 10.1016/s0092-8674(85)80097-0. [DOI] [PubMed] [Google Scholar]
  7. 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]
  8. Field C., Schekman R. Localized secretion of acid phosphatase reflects the pattern of cell surface growth in Saccharomyces cerevisiae. J Cell Biol. 1980 Jul;86(1):123–128. doi: 10.1083/jcb.86.1.123. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Franzusoff A., Redding K., Crosby J., Fuller R. S., Schekman R. Localization of components involved in protein transport and processing through the yeast Golgi apparatus. J Cell Biol. 1991 Jan;112(1):27–37. doi: 10.1083/jcb.112.1.27. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Franzusoff A., Schekman R. Functional compartments of the yeast Golgi apparatus are defined by the sec7 mutation. EMBO J. 1989 Sep;8(9):2695–2702. doi: 10.1002/j.1460-2075.1989.tb08410.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Fuller R. S., Brake A. J., Thorner J. Intracellular targeting and structural conservation of a prohormone-processing endoprotease. Science. 1989 Oct 27;246(4929):482–486. doi: 10.1126/science.2683070. [DOI] [PubMed] [Google Scholar]
  12. Fuller R. S., Brake A., Thorner J. Yeast prohormone processing enzyme (KEX2 gene product) is a Ca2+-dependent serine protease. Proc Natl Acad Sci U S A. 1989 Mar;86(5):1434–1438. doi: 10.1073/pnas.86.5.1434. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Fuller R. S., Sterne R. E., Thorner J. Enzymes required for yeast prohormone processing. Annu Rev Physiol. 1988;50:345–362. doi: 10.1146/annurev.ph.50.030188.002021. [DOI] [PubMed] [Google Scholar]
  14. Holcomb C. L., Etcheverry T., Schekman R. Isolation of secretory vesicles from Saccharomyces cerevisiae. Anal Biochem. 1987 Nov 1;166(2):328–334. doi: 10.1016/0003-2697(87)90581-1. [DOI] [PubMed] [Google Scholar]
  15. Iida H., Yahara I. Specific early-G1 blocks accompanied with stringent response in Saccharomyces cerevisiae lead to growth arrest in resting state similar to the G0 of higher eucaryotes. J Cell Biol. 1984 Apr;98(4):1185–1193. doi: 10.1083/jcb.98.4.1185. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Johnston G. C., Pringle J. R., Hartwell L. H. Coordination of growth with cell division in the yeast Saccharomyces cerevisiae. Exp Cell Res. 1977 Mar 1;105(1):79–98. doi: 10.1016/0014-4827(77)90154-9. [DOI] [PubMed] [Google Scholar]
  17. 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]
  18. Julius D., Brake A., Blair L., Kunisawa R., Thorner J. Isolation of the putative structural gene for the lysine-arginine-cleaving endopeptidase required for processing of yeast prepro-alpha-factor. Cell. 1984 Jul;37(3):1075–1089. doi: 10.1016/0092-8674(84)90442-2. [DOI] [PubMed] [Google Scholar]
  19. Julius D., Schekman R., Thorner J. Glycosylation and processing of prepro-alpha-factor through the yeast secretory pathway. Cell. 1984 Feb;36(2):309–318. doi: 10.1016/0092-8674(84)90224-1. [DOI] [PubMed] [Google Scholar]
  20. 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]
  21. Kornfeld R., Kornfeld S. Assembly of asparagine-linked oligosaccharides. Annu Rev Biochem. 1985;54:631–664. doi: 10.1146/annurev.bi.54.070185.003215. [DOI] [PubMed] [Google Scholar]
  22. Kreis T. E. Role of microtubules in the organisation of the Golgi apparatus. Cell Motil Cytoskeleton. 1990;15(2):67–70. doi: 10.1002/cm.970150202. [DOI] [PubMed] [Google Scholar]
  23. Kukuruzinska M. A., Bergh M. L., Jackson B. J. Protein glycosylation in yeast. Annu Rev Biochem. 1987;56:915–944. doi: 10.1146/annurev.bi.56.070187.004411. [DOI] [PubMed] [Google Scholar]
  24. Kurjan J., Herskowitz I. Structure of a yeast pheromone gene (MF alpha): a putative alpha-factor precursor contains four tandem copies of mature alpha-factor. Cell. 1982 Oct;30(3):933–943. doi: 10.1016/0092-8674(82)90298-7. [DOI] [PubMed] [Google Scholar]
  25. Lucocq J. M., Berger E. G., Warren G. Mitotic Golgi fragments in HeLa cells and their role in the reassembly pathway. J Cell Biol. 1989 Aug;109(2):463–474. doi: 10.1083/jcb.109.2.463. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. 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]
  27. 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]
  28. Novick P., Schekman R. Secretion and cell-surface growth are blocked in a temperature-sensitive mutant of Saccharomyces cerevisiae. Proc Natl Acad Sci U S A. 1979 Apr;76(4):1858–1862. doi: 10.1073/pnas.76.4.1858. [DOI] [PMC free article] [PubMed] [Google Scholar]
  29. Orci L., Ravazzola M., Storch M. J., Anderson R. G., Vassalli J. D., Perrelet A. Proteolytic maturation of insulin is a post-Golgi event which occurs in acidifying clathrin-coated secretory vesicles. Cell. 1987 Jun 19;49(6):865–868. doi: 10.1016/0092-8674(87)90624-6. [DOI] [PubMed] [Google Scholar]
  30. Payne G. S., Schekman R. Clathrin: a role in the intracellular retention of a Golgi membrane protein. Science. 1989 Sep 22;245(4924):1358–1365. doi: 10.1126/science.2675311. [DOI] [PubMed] [Google Scholar]
  31. Pringle J. R., Preston R. A., Adams A. E., Stearns T., Drubin D. G., Haarer B. K., Jones E. W. Fluorescence microscopy methods for yeast. Methods Cell Biol. 1989;31:357–435. doi: 10.1016/s0091-679x(08)61620-9. [DOI] [PubMed] [Google Scholar]
  32. Rose M. D., Misra L. M., Vogel J. P. KAR2, a karyogamy gene, is the yeast homolog of the mammalian BiP/GRP78 gene. Cell. 1989 Jun 30;57(7):1211–1221. doi: 10.1016/0092-8674(89)90058-5. [DOI] [PubMed] [Google Scholar]
  33. Rose M. D., Novick P., Thomas J. H., Botstein D., Fink G. R. A Saccharomyces cerevisiae genomic plasmid bank based on a centromere-containing shuttle vector. Gene. 1987;60(2-3):237–243. doi: 10.1016/0378-1119(87)90232-0. [DOI] [PubMed] [Google Scholar]
  34. Rothblatt J. A., Meyer D. I. Secretion in yeast: reconstitution of the translocation and glycosylation of alpha-factor and invertase in a homologous cell-free system. Cell. 1986 Feb 28;44(4):619–628. doi: 10.1016/0092-8674(86)90271-0. [DOI] [PubMed] [Google Scholar]
  35. Rothman J. H., Raymond C. K., Gilbert T., O'Hara P. J., Stevens T. H. A putative GTP binding protein homologous to interferon-inducible Mx proteins performs an essential function in yeast protein sorting. Cell. 1990 Jun 15;61(6):1063–1074. doi: 10.1016/0092-8674(90)90070-u. [DOI] [PubMed] [Google Scholar]
  36. Schekman R. Protein localization and membrane traffic in yeast. Annu Rev Cell Biol. 1985;1:115–143. doi: 10.1146/annurev.cb.01.110185.000555. [DOI] [PubMed] [Google Scholar]
  37. Schulze E., Kirschner M. Dynamic and stable populations of microtubules in cells. J Cell Biol. 1987 Feb;104(2):277–288. doi: 10.1083/jcb.104.2.277. [DOI] [PMC free article] [PubMed] [Google Scholar]
  38. Segev N., Mulholland J., Botstein D. The yeast GTP-binding YPT1 protein and a mammalian counterpart are associated with the secretion machinery. Cell. 1988 Mar 25;52(6):915–924. doi: 10.1016/0092-8674(88)90433-3. [DOI] [PubMed] [Google Scholar]
  39. 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]
  40. Svoboda A., Necas O. Ultrastructure of Saccharomyces cerevisiae cells accumulating Golgi organelles. J Basic Microbiol. 1987;27(10):603–612. doi: 10.1002/jobm.3620271008. [DOI] [PubMed] [Google Scholar]
  41. Tooze J., Tooze S. A. Clathrin-coated vesicular transport of secretory proteins during the formation of ACTH-containing secretory granules in AtT20 cells. J Cell Biol. 1986 Sep;103(3):839–850. doi: 10.1083/jcb.103.3.839. [DOI] [PMC free article] [PubMed] [Google Scholar]
  42. Weisman L. S., Bacallao R., Wickner W. Multiple methods of visualizing the yeast vacuole permit evaluation of its morphology and inheritance during the cell cycle. J Cell Biol. 1987 Oct;105(4):1539–1547. doi: 10.1083/jcb.105.4.1539. [DOI] [PMC free article] [PubMed] [Google Scholar]
  43. Wilson D. W., Wilcox C. A., Flynn G. C., Chen E., Kuang W. J., Henzel W. J., Block M. R., Ullrich A., Rothman J. E. A fusion protein required for vesicle-mediated transport in both mammalian cells and yeast. Nature. 1989 Jun 1;339(6223):355–359. doi: 10.1038/339355a0. [DOI] [PubMed] [Google Scholar]

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