Skip to main content
Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1970 Jul;66(3):952–958. doi: 10.1073/pnas.66.3.952

Immunoglobulin Synthesis and Secretion, IV. Sites of Incorporation of Sugars as Determined by Subcellular Fractionation*

Jonathan W Uhr 1,2,, Isaac Schenkein 1,2
PMCID: PMC283143  PMID: 5269256

Abstract

P3K cells were uniformly labeled with [14C]leucine and also for 1 hr with [3H]leucine, [3]galactose, or [3H]glucosamine. Subcellular fractionation of labeled cells was performed and the amounts of radioactive immunoglobulin G in each fraction were determined. The results indicate that amino acids are incorporated in the rough endoplasmic reticulum, galactose primarily in the smooth endoplasmic reticulum, and glucosamine at both sites. A small portion of radioactivity was found in the microsomal supernatant regardless of the radioisotope employed.

Full text

PDF
956

Selected References

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

  1. BOAS N. F. Method for the determination of hexosamines in tissues. J Biol Chem. 1953 Oct;204(2):553–563. [PubMed] [Google Scholar]
  2. Clark S. L., Jr The synthesis and storage of protein by isolated lymphoid cells, examined by autoradiography with the electron microscope. Am J Anat. 1966 Nov;119(3):375–403. doi: 10.1002/aja.1001190304. [DOI] [PubMed] [Google Scholar]
  3. FLEISCHMAN J. B., PAIN R. H., PORTER R. R. Reduction of gamma-globulins. Arch Biochem Biophys. 1962 Sep;Suppl 1:174–180. [PubMed] [Google Scholar]
  4. Jamieson J. D., Palade G. E. Intracellular transport of secretory proteins in the pancreatic exocrine cell. II. Transport to condensing vacuoles and zymogen granules. J Cell Biol. 1967 Aug;34(2):597–615. doi: 10.1083/jcb.34.2.597. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Partridge S. M. Filter-paper partition chromatography of sugars: 1. General description and application to the qualitative analysis of sugars in apple juice, egg white and foetal blood of sheep. with a note by R. G. Westall. Biochem J. 1948;42(2):238–250. doi: 10.1042/bj0420238. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Schenkein I., Uhr J. W. Immunoglobulin synthesis and secretion. I. Biosynthetic studies of the addition of the carbohydrate moieties. J Cell Biol. 1970 Jul;46(1):42–51. doi: 10.1083/jcb.46.1.42. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Sherr C. J., Uhr J. W. Immunoglobulin synthesis and secretion. 3. Incorporation of glucosamine into immunoglobulin on polyribosomes. Proc Natl Acad Sci U S A. 1969 Sep;64(1):381–387. doi: 10.1073/pnas.64.1.381. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Swenson R. M., Kern M. Synthesis and secretion of gamma-globulin by lymph node cells. II. The intracellular segregation of amino acid-labeled and carbohydrate-labeled gamma-globulin. J Biol Chem. 1967 Jul 10;242(13):3242–3244. [PubMed] [Google Scholar]

Articles from Proceedings of the National Academy of Sciences of the United States of America are provided here courtesy of National Academy of Sciences

RESOURCES