Identification of cholera toxin-binding sites in the nucleus of intestinal epithelial cells.
Post-embedding immunogold electron microscopy shows several binding sites for cholera toxin in mouse intestinal epithelial cells, particularly in the heterochromatin of the nucleus as well as in the plasma membrane. Anti-ganglioside GM1 antibodies also bound to the nucleus, but did not interfere with the binding of toxin. 125I-labelled toxin bound specifically to a nuclear preparation from rabbit intestinal cells.
Parkinson
M E
ME
Department of Biochemistry, University of Edinburgh, Scotland.
Smith
C G
CG
Garland
P B
PB
van Heyningen
S
S
D000818:Animals; D002462:Cell Membrane / Q000378:metabolism; D002467:Cell Nucleus / Q000378:metabolism*; D002772:Cholera Toxin / Q000378:metabolism*; D004848:Epithelium / Q000378:metabolism; D005677:G(M1) Ganglioside / Q000378:metabolism; D006570:Heterochromatin / Q000378:metabolism; D007150:Immunohistochemistry; D007413:Intestinal Mucosa / Q000378:metabolism*; D051379:Mice; D008854:Microscopy, Electron; D008871:Microvilli / Q000378:metabolism
D006570:Heterochromatin; D005677:G(M1) Ganglioside; D002772:Cholera Toxin