Syndeins: the spectrin-binding protein(s) of the human erythrocyte membrane.
Two-dimensional tryptic and chymotryptic analyses of all the major bands in a sodium dodecyl sulfate/polyacrylamide gel of the human erythrocyte membrane show that each band has a characteristic map. However, band 2.1 (nomenclature of T. L. Steck) and several polypeptides below this band exhibit similar tryptic and chymotryptic peptide maps and thus appear to be a family of closely related proteins or degradation products. Furthermore, they all contain a subset of peptides that are accounted for by the peptides from two known spectrin-binding fragments. We show that both fragments derive from 2.1-related proteins and conclude that band 2.1 and its related proteins, which we name "syndeins", bind spectrin and connect it to the erythrocyte membrane.
D002352:Carrier Proteins / Q000097:blood*; D004910:Erythrocyte Membrane / Q000032:analysis*; D004912:Erythrocytes / Q000032:analysis*; D006801:Humans; D008565:Membrane Proteins / Q000097:blood* / Q000378:metabolism*; D008970:Molecular Weight; D010446:Peptide Fragments / Q000032:analysis; D013049:Spectrin / Q000378:metabolism*
D002352:Carrier Proteins; D008565:Membrane Proteins; D010446:Peptide Fragments; D013049:Spectrin