Abstract:
:Trypsinized normal rat embryo fibroblasts and untrypsinized and trypsinized transformed rat fibroblasts have two orders of binding sites for bacterial glycolipid mR595. The high order sites fix 1--3 micrograms glycolipid mR595/10(5) cells and those of the low order fix about 6 microgram glycolipids mR595/10(6) cells. Ca++ is required for the low order glycolipid mR595 binding to be trypsinized but not to the untrypsinized transformed rat fibroblasts. The low order binding is temperature dependent with the transition temperature lying between 25 and 37 degrees C. Exogenously added ganglioside and glycoproteins contained in the fetal calf serum do not inhibit fixation of glycolipid mR595. Only beta-lipoprotein at high concentrations is slightly inhibitory. Glycolipid mR595 fixation to transformed fibroblast does not alter their morphology and appears to slightly improve cell attachment to substratum. Glycolipid mR595 fixation results in a lengthening of the S-phase of the cell cycle and a reduction in 2-deoxyglucose uptake. Uptake of inorganic phosphate is not affected. Inhibition of phospholipid synthesis is observed in mR595 fixed fibroblasts whereas synthesis of cell surface glycoproteins and the content of cellular gangliosides is not affected.
journal_name
J Cell Physioljournal_title
Journal of cellular physiologyauthors
Lallier R,Trudel M,Brailovsky CA,Nigam VNdoi
10.1002/jcp.1040980113subject
Has Abstractpub_date
1979-01-01 00:00:00pages
113-23issue
1eissn
0021-9541issn
1097-4652journal_volume
98pub_type
杂志文章abstract::Protein sorting through vesicular compartments is highly regulated to maintain the integrity and signaling of intracellular organelles in eukaryotic cells. Sorting Nexin-2 (SNX2) is involved in protein sorting in the trans-Golgi network, endosome, and/or lysosome compartments, with loss of function leading to defect i...
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