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. 1988 Jun 1;106(6):1831–1841. doi: 10.1083/jcb.106.6.1831

Immunocytochemical localization of mutant low density lipoprotein receptors that fail to reach the Golgi complex

PMCID: PMC2115130  PMID: 2898477

Abstract

In the low density lipoprotein (LDL) receptor system, blocks in intracellular movement of a cell surface receptor result from naturally occurring mutations. These mutations occur in patients with familial hypercholesterolemia. One class of mutant LDL receptor genes (class 2 mutations) produces a receptor that is synthesized and glycosylated in the endoplasmic reticulum (ER) but does not reach the cell surface. These receptors contain serine/threonine-linked (O-linked) carbohydrate chains with core N-acetylgalactosamine residues and asparagine-linked (N-linked) carbohydrate chains of the high mannose type that are only partially trimmed. To determine the site of blockage in transport, we used electron microscope immunohistochemistry to compare the intracellular location of LDL receptors in normal human fibroblasts with their location in class 2 mutant fibroblasts. In normal cells, LDL receptors were located in coated pits, coated vesicles, endosomes, multivesicular bodies, and portions of the Golgi complex. In contrast, the mutant receptors in class 2 cells were almost entirely confined to rough ER and irregular extensions of the rough ER. Metabolic labeling studies with [3H]glucosamine confirmed that these mutant receptors contain core O-linked sugars, suggesting that the enzymes that attach these residues are located in the rough ER or the transitional zone of the ER. These studies establish that naturally occurring mutations in cell surface receptors can cause the receptors to remain trapped in the ER, thereby preventing their normal function and producing a genetic disease.

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Selected References

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

  1. Abeijon C., Hirschberg C. B. Subcellular site of synthesis of the N-acetylgalactosamine (alpha 1-0) serine (or threonine) linkage in rat liver. J Biol Chem. 1987 Mar 25;262(9):4153–4159. [PubMed] [Google Scholar]
  2. Amano J., Nishimura R., Mochizuki M., Kobata A. Comparative study of the mucin-type sugar chains of human chorionic gonadotropin present in the urine of patients with trophoblastic diseases and healthy pregnant women. J Biol Chem. 1988 Jan 25;263(3):1157–1165. [PubMed] [Google Scholar]
  3. Anderson R. G., Brown M. S., Beisiegel U., Goldstein J. L. Surface distribution and recycling of the low density lipoprotein receptor as visualized with antireceptor antibodies. J Cell Biol. 1982 Jun;93(3):523–531. doi: 10.1083/jcb.93.3.523. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Anderson R. G., Brown M. S., Goldstein J. L. Inefficient internalization of receptor-bound low density lipoprotein in human carcinoma A-431 cells. J Cell Biol. 1981 Feb;88(2):441–452. doi: 10.1083/jcb.88.2.441. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Anderson R. G., Brown M. S., Goldstein J. L. Role of the coated endocytic vesicle in the uptake of receptor-bound low density lipoprotein in human fibroblasts. Cell. 1977 Mar;10(3):351–364. doi: 10.1016/0092-8674(77)90022-8. [DOI] [PubMed] [Google Scholar]
  6. Baenziger J., Kornfeld S. Structure of the carbohydrate units of IgA1 immunoglobulin. II. Structure of the O-glycosidically linked oligosaccharide units. J Biol Chem. 1974 Nov 25;249(22):7270–7281. [PubMed] [Google Scholar]
  7. Beisiegel U., Schneider W. J., Brown M. S., Goldstein J. L. Immunoblot analysis of low density lipoprotein receptors in fibroblasts from subjects with familial hypercholesterolemia. J Biol Chem. 1982 Nov 10;257(21):13150–13156. [PubMed] [Google Scholar]
  8. Brown M. S., Anderson R. G., Goldstein J. L. Recycling receptors: the round-trip itinerary of migrant membrane proteins. Cell. 1983 Mar;32(3):663–667. doi: 10.1016/0092-8674(83)90052-1. [DOI] [PubMed] [Google Scholar]
  9. Brown W. J., Goodhouse J., Farquhar M. G. Mannose-6-phosphate receptors for lysosomal enzymes cycle between the Golgi complex and endosomes. J Cell Biol. 1986 Oct;103(4):1235–1247. doi: 10.1083/jcb.103.4.1235. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Carlson D. M. Structures and immunochemical properties of oligosaccharides isolated from pig submaxillary mucins. J Biol Chem. 1968 Feb 10;243(3):616–626. [PubMed] [Google Scholar]
  11. Cummings R. D., Kornfeld S., Schneider W. J., Hobgood K. K., Tolleshaug H., Brown M. S., Goldstein J. L. Biosynthesis of N- and O-linked oligosaccharides of the low density lipoprotein receptor. J Biol Chem. 1983 Dec 25;258(24):15261–15273. [PubMed] [Google Scholar]
  12. Cummings R. D., Kornfeld S. The distribution of repeating [Gal beta 1,4GlcNAc beta 1,3] sequences in asparagine-linked oligosaccharides of the mouse lymphoma cell lines BW5147 and PHAR 2.1. J Biol Chem. 1984 May 25;259(10):6253–6260. [PubMed] [Google Scholar]
  13. Davis C. G., Elhammer A., Russell D. W., Schneider W. J., Kornfeld S., Brown M. S., Goldstein J. L. Deletion of clustered O-linked carbohydrates does not impair function of low density lipoprotein receptor in transfected fibroblasts. J Biol Chem. 1986 Feb 25;261(6):2828–2838. [PubMed] [Google Scholar]
  14. Gething M. J., McCammon K., Sambrook J. Expression of wild-type and mutant forms of influenza hemagglutinin: the role of folding in intracellular transport. Cell. 1986 Sep 12;46(6):939–950. doi: 10.1016/0092-8674(86)90076-0. [DOI] [PubMed] [Google Scholar]
  15. Geuze H. J., Slot J. W., Strous G. J., Lodish H. F., Schwartz A. L. Intracellular site of asialoglycoprotein receptor-ligand uncoupling: double-label immunoelectron microscopy during receptor-mediated endocytosis. Cell. 1983 Jan;32(1):277–287. doi: 10.1016/0092-8674(83)90518-4. [DOI] [PubMed] [Google Scholar]
  16. Geuze H. J., Slot J. W., Strous G. J., Peppard J., von Figura K., Hasilik A., Schwartz A. L. Intracellular receptor sorting during endocytosis: comparative immunoelectron microscopy of multiple receptors in rat liver. Cell. 1984 May;37(1):195–204. doi: 10.1016/0092-8674(84)90315-5. [DOI] [PubMed] [Google Scholar]
  17. Goldstein J. L., Basu S. K., Brown M. S. Receptor-mediated endocytosis of low-density lipoprotein in cultured cells. Methods Enzymol. 1983;98:241–260. doi: 10.1016/0076-6879(83)98152-1. [DOI] [PubMed] [Google Scholar]
  18. Goldstein J. L., Brown M. S., Anderson R. G., Russell D. W., Schneider W. J. Receptor-mediated endocytosis: concepts emerging from the LDL receptor system. Annu Rev Cell Biol. 1985;1:1–39. doi: 10.1146/annurev.cb.01.110185.000245. [DOI] [PubMed] [Google Scholar]
  19. Hanover J. A., Elting J., Mintz G. R., Lennarz W. J. Temporal aspects of the N- and O-glycosylation of human chorionic gonadotropin. J Biol Chem. 1982 Sep 10;257(17):10172–10177. [PubMed] [Google Scholar]
  20. Hercz A., Katona E., Cutz E., Wilson J. R., Barton M. alpha1-Antitrypsin: the presence of excess mannose in the Z variant isolated from liver. Science. 1978 Sep 29;201(4362):1229–1232. doi: 10.1126/science.308696. [DOI] [PubMed] [Google Scholar]
  21. Louvard D., Reggio H., Warren G. Antibodies to the Golgi complex and the rough endoplasmic reticulum. J Cell Biol. 1982 Jan;92(1):92–107. doi: 10.1083/jcb.92.1.92. [DOI] [PMC free article] [PubMed] [Google Scholar]
  22. Marsh M., Griffiths G., Dean G. E., Mellman I., Helenius A. Three-dimensional structure of endosomes in BHK-21 cells. Proc Natl Acad Sci U S A. 1986 May;83(9):2899–2903. doi: 10.1073/pnas.83.9.2899. [DOI] [PMC free article] [PubMed] [Google Scholar]
  23. Nyame K., Cummings R. D., Damian R. T. Schistosoma mansoni synthesizes glycoproteins containing terminal O-linked N-acetylglucosamine residues. J Biol Chem. 1987 Jun 15;262(17):7990–7995. [PubMed] [Google Scholar]
  24. Palade G. Intracellular aspects of the process of protein synthesis. Science. 1975 Aug 1;189(4200):347–358. doi: 10.1126/science.1096303. [DOI] [PubMed] [Google Scholar]
  25. Pastan I. H., Willingham M. C. Journey to the center of the cell: role of the receptosome. Science. 1981 Oct 30;214(4520):504–509. doi: 10.1126/science.6170111. [DOI] [PubMed] [Google Scholar]
  26. RUPLEY J. A. THE HYDROLYSIS OF CHITIN BY CONCENTRATED HYDROCHLORIC ACID, AND THE PREPARATION OF LOW-MOLECULAR-WEIGHT SUBSTRATES FOR LYSOZYME. Biochim Biophys Acta. 1964 Nov 1;83:245–255. doi: 10.1016/0926-6526(64)90001-1. [DOI] [PubMed] [Google Scholar]
  27. Rizzolo L. J., Finidori J., Gonzalez A., Arpin M., Ivanov I. E., Adesnik M., Sabatini D. D. Biosynthesis and intracellular sorting of growth hormone-viral envelope glycoprotein hybrids. J Cell Biol. 1985 Oct;101(4):1351–1362. doi: 10.1083/jcb.101.4.1351. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Russell D. W., Schneider W. J., Yamamoto T., Luskey K. L., Brown M. S., Goldstein J. L. Domain map of the LDL receptor: sequence homology with the epidermal growth factor precursor. Cell. 1984 Jun;37(2):577–585. doi: 10.1016/0092-8674(84)90388-x. [DOI] [PubMed] [Google Scholar]
  29. Tolleshaug H., Hobgood K. K., Brown M. S., Goldstein J. L. The LDL receptor locus in familial hypercholesterolemia: multiple mutations disrupt transport and processing of a membrane receptor. Cell. 1983 Mar;32(3):941–951. doi: 10.1016/0092-8674(83)90079-x. [DOI] [PubMed] [Google Scholar]
  30. Yamamoto T., Bishop R. W., Brown M. S., Goldstein J. L., Russell D. W. Deletion in cysteine-rich region of LDL receptor impedes transport to cell surface in WHHL rabbit. Science. 1986 Jun 6;232(4755):1230–1237. doi: 10.1126/science.3010466. [DOI] [PMC free article] [PubMed] [Google Scholar]

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