Journal article
Purification and characterization of testicular transferrin secreted by rat Sertoli cells
Biochemical journal, Vol.218(2), pp.313-320
03/01/1984
Handle:
https://hdl.handle.net/2376/108326
PMCID: PMC1153343
PMID: 6712616
Abstract
Sertoli cells synthesize and secrete a transferrin-like protein (testicular transferrin) [Skinner & Griswold (1980) J. Biol. Chem. 255, 1923-1925]. The purpose of the present study was to purify and characterize testicular transferrin and to compare it with serum transferrin. Testicular transferrin was obtained from the medium of cultured rat Sertoli cells, whereas serum transferrin was obtained from rat serum. Both proteins were purified with the use of phenyl-Sepharose hydrophobic chromatography and transferrin immunoaffinity chromatography. The purified proteins were shown to have similar molecular masses (75 000 Da) and amino acid compositions. The pattern of tryptic peptides from testicular and serum transferrin were found to be essentially the same when analysed by reverse-phase high-pressure liquid chromatography. The carbohydrate composition of both transferrins was determined by several colorimetric assays and g.l.c. Testicular transferrin, isolated from cell culture medium, had increased amounts of glucose, galactose and glucosamine. Serum transferrin that was incubated with cell culture medium also had a large amount of associated glucose. The results show that testicular transferrin and serum transferrin are structurally very similar and are possibly products of the same gene expressed in two different tissues, the testis and liver. However, the amount of carbohydrate associated with these two proteins is different.
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Details
- Title
- Purification and characterization of testicular transferrin secreted by rat Sertoli cells
- Creators
- M K SkinnerW L CosandM D Griswold
- Publication Details
- Biochemical journal, Vol.218(2), pp.313-320
- Academic Unit
- Molecular Biosciences, School of
- Publisher
- England
- Grant note
- HD00263 / NICHD NIH HHS HD10808 / NICHD NIH HHS
- Identifiers
- 99900546949601842
- Language
- English
- Resource Type
- Journal article