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Human erythrocyte clathrin and clathrin-uncoating protein.

Publication ,  Journal Article
Davis, JQ; Bennett, V
Published in: J Biol Chem
November 25, 1985

Clathrin, a Mr = 72,000 clathrin-associated protein, and myosin were purified in milligram quantities from the same erythrocyte hemolysate fraction. Erythrocyte clathrin closely resembled brain clathrin in several respects: (a) both are triskelions as visualized by electron microscopy with arms 40 nm in length with globular ends and a flexible hinge region in the middle of each arm, and these triskelions assemble into polyhedral "cages" at appropriate pH and ionic strength; (b) both molecules contain heavy chains of Mr = 170,000 that are indistinguishable by two-dimensional maps of 125I-labeled peptides; and (c) both molecules contain light chains of Mr approximately 40,000 in a 1:1 molar ratio with the heavy chain. Erythrocyte clathrin is not identical to brain clathrin since antibody raised against the erythrocyte protein reacts better with erythrocyte clathrin than with brain clathrin and since brain clathrin contains two light chains resolved on sodium dodecyl sulfate gels while the light chain of erythrocyte clathrin migrates as a single band. The erythrocyte Mr = 72,000 clathrin-associated protein is closely related to a protein in brain that mediates ATP-dependent disassembly of clathrin from coated vesicles and binds tightly to clathrin triskelions (Schlossman, D. M., Schmid, S. L., Braell, W. A., and Rothman, J. E. (1984) J. Cell Biol. 99, 723-733). The erythrocyte and brain proteins have identical Mr on sodium dodecyl sulfate gels and identical maps of 125I-labeled peptides, share antigenic sites, and bind tightly to ATP immobilized on agarose. Clathrin and the uncoating protein are not restricted to reticulocytes since equivalent amounts of these proteins are present in whole erythrocyte populations and reticulocyte-depleted erythrocytes. Clathrin is present at 6,000 triskelions/cells, while the uncoating protein is in substantial excess at 250,000 copies/cell.

Duke Scholars

Published In

J Biol Chem

ISSN

0021-9258

Publication Date

November 25, 1985

Volume

260

Issue

27

Start / End Page

14850 / 14856

Location

United States

Related Subject Headings

  • Peptide Fragments
  • Myosins
  • Molecular Weight
  • Microscopy, Electron
  • Macromolecular Substances
  • Humans
  • Hemolysis
  • HSP70 Heat-Shock Proteins
  • HSC70 Heat-Shock Proteins
  • Electrophoresis, Polyacrylamide Gel
 

Citation

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Davis, J. Q., & Bennett, V. (1985). Human erythrocyte clathrin and clathrin-uncoating protein. J Biol Chem, 260(27), 14850–14856.
Davis, J. Q., and V. Bennett. “Human erythrocyte clathrin and clathrin-uncoating protein.J Biol Chem 260, no. 27 (November 25, 1985): 14850–56.
Davis JQ, Bennett V. Human erythrocyte clathrin and clathrin-uncoating protein. J Biol Chem. 1985 Nov 25;260(27):14850–6.
Davis, J. Q., and V. Bennett. “Human erythrocyte clathrin and clathrin-uncoating protein.J Biol Chem, vol. 260, no. 27, Nov. 1985, pp. 14850–56.
Davis JQ, Bennett V. Human erythrocyte clathrin and clathrin-uncoating protein. J Biol Chem. 1985 Nov 25;260(27):14850–14856.

Published In

J Biol Chem

ISSN

0021-9258

Publication Date

November 25, 1985

Volume

260

Issue

27

Start / End Page

14850 / 14856

Location

United States

Related Subject Headings

  • Peptide Fragments
  • Myosins
  • Molecular Weight
  • Microscopy, Electron
  • Macromolecular Substances
  • Humans
  • Hemolysis
  • HSP70 Heat-Shock Proteins
  • HSC70 Heat-Shock Proteins
  • Electrophoresis, Polyacrylamide Gel