Isolation and Partial Characterization of the Sialoglycoprotein Fraction of Murine Erythrocyte Ghosts
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With the lithium diiodosalicylate (LIS1) extraction-phenol partition method, we have isolated a sialoglycoprotein fraction from DBA/2 mouse erythrocyte ghosts. We have demonstrated that the Laemmeli system for SDS PAGE can resolve this fraction into four monomers of which two (gp-2.1 and gp-3.1) appear to be authentic, whereas the other two (gp-2.2 and gp-3.2) are probably generated from gp-2.1 and gp-3.1, by limited proteolysis during the isolation procedure. All four components contain O-acetylated neuraminic acid residues, can be stained with Periodic acid-Schiff reagent (PAS) and with Coomassie Brilliant Blue (CB), and can be radioiodinated with the lactoperoxidase-glucose oxidase (LPO-GO) method. All monomers but especially gp-2.1 and gp-3.1 generate characteristic aggregates during solubilization in SDS. The aggregation is enhanced by boiling at high concentrations, and can be reversed by boiling at low concentrations. In addition, the fraction contains a diffuse component present also in ghosts which stains poorly with CB and with PAS and cannot be radioiodinated by the LPO-GO technique. SDS PAGE in the Steck and Yu gel system does not give an accurate separation of the sialoglycoprotein monomers.
Bhavanandan V, Zhu Q, Yamakami K, Dilulio N, Nair S, Capon C Glycoconj J. 1998; 15(1):37-49.
PMID: 9530955 DOI: 10.1023/a:1006987315827.
Immunofluorescent detection of erythrocyte sialoglycoprotein antigens on murine erythroid cells.
Sarris A, Palade G J Cell Biol. 1982; 93(3):591-602.
PMID: 6749862 PMC: 2112129. DOI: 10.1083/jcb.93.3.591.
Kerjaschki D, Sharkey D, Farquhar M J Cell Biol. 1984; 98(4):1591-6.
PMID: 6371025 PMC: 2113206. DOI: 10.1083/jcb.98.4.1591.
Kerjaschki D, Vernillo A, Farquhar M Am J Pathol. 1985; 118(3):343-9.
PMID: 3976840 PMC: 1887944.
An integral glycoprotein associated with the membrane attachment sites of actin microfilaments.
Rogalski A, Singer S J Cell Biol. 1985; 101(3):785-801.
PMID: 3897248 PMC: 2113720. DOI: 10.1083/jcb.101.3.785.