Abstract:
:By a combination of trace techniques and various biochemical methods, information about the characteristics of a 15-kDa selenoprotein was obtained. After labeling of rats in vivo with [(75)Se]selenite, subcellular fractionation of the homogenates of the prostate, lung, brain, thyroid gland, and large intestine, and gel electrophoretic separation of the proteins and subcellular fractionation, 15-kDa (75)Se was found in the cytosols of the tissues prostate > brain > lung > thyroid gland > large intestine after autoradiography. After coelectrophoresis of the separated 15-kDa labeled band obtained from each cytosolic fraction, the 15-kDa (75)Se band migrated in the same way as the combined bands isolated from the five tissue cytosols. After proteolytic cleavage in the gel of the 15-kDa labeled band obtained from the cytosol of each tissue and re-electrophoresis, the same labeled peptide pattern was found in each gel slice after autoradiography. By means of reversed-phase HPLC, we characterized a selenocysteine-containing protein that has enzymatic activity like that of glutathione peroxidase.
journal_name
Ann N Y Acad Scijournal_title
Annals of the New York Academy of Sciencesauthors
Kyriakopoulos A,Bukalis K,Roethlein D,Hoppe B,Graebert A,Behne Ddoi
10.1196/annals.1329.057subject
Has Abstractpub_date
2004-12-01 00:00:00pages
458-61eissn
0077-8923issn
1749-6632pii
1030/1/458journal_volume
1030pub_type
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