1983
DOI: 10.1083/jcb.97.2.579
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Co-migration and internalization of transferrin and its receptor on K562 cells.

Abstract: The incorporation of iron into human cells involves the binding of diferric transferrin to a specific cell surface receptor. We studied the process of endocytosis in K562, a human erythroid cell line, by using tetramethylrhodamine isothiocyanate-labeled transferrin (TRITC-transferrin) and fluorescein isothiocyanate-labeled Fab fragments of goat antireceptor IgG preparation (FITC-Fabantitransferrin receptor antibody). Because the antireceptor antibody and transferrin bind to different sites on the transferrin r… Show more

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Cited by 84 publications
(37 citation statements)
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“…In addition, because transferrin is thought not to dissociate from its receptor inside the cell (18,19), the pathway of recycling of transferrin might provide invaluable morphologic clues to the pathway(s) of receptor recycling. Consistent with previous studies in our laboratory and others, transferrin enters cells via coated pits and receptosomes (10,11,(20)(21)(22)(23)(24). Transferrin is then detected in tubules of the TRG and, a short time later, in structures with an appearance similar to the tubules of the TRG, but intimately associated with microtubules.…”
supporting
confidence: 76%
“…In addition, because transferrin is thought not to dissociate from its receptor inside the cell (18,19), the pathway of recycling of transferrin might provide invaluable morphologic clues to the pathway(s) of receptor recycling. Consistent with previous studies in our laboratory and others, transferrin enters cells via coated pits and receptosomes (10,11,(20)(21)(22)(23)(24). Transferrin is then detected in tubules of the TRG and, a short time later, in structures with an appearance similar to the tubules of the TRG, but intimately associated with microtubules.…”
supporting
confidence: 76%
“…However, our data suggest that receptor capping is not a general mechanism, because TfR capping (ref. 29 and Fig. 8 A, which is published as supporting information on the PNAS web site) does not alter polarity (Figs.…”
Section: Discussionmentioning
confidence: 99%
“…Like the transferrin and EGF-receptor complexes (25,26,31), the 125 I-hCG-LHR complex remains associated during internalization (7,9), and internalization of the complex can be conveniently assessed by following the distribution of the bound 125 I-hCG between the cell surface and the interior of the cell (see "Materials and Methods"). The results presented in Table I show that grafting only the Cterminal domain of the rLHR onto the hLHR (i.e.…”
Section: Signaling Properties and Internalization Of Hcg Mediated By mentioning
confidence: 99%