Characterization of a premeiotic germ cell-specific cytoplasmic protein encoded by Stra8, a novel retinoic acid-responsive gene.
The full-length cDNA corresponding to Stra8, a novel gene inducible by retinoic acid (RA) in P19 embryonal carcinoma cells, has been isolated and shown to encode a 45-kD protein. Both Stra8 mRNA and protein were induced in cells treated by all-trans and 9-cis retinoic acids. Two-dimensional gel analysis and dephosphorylation experiments revealed that the two stereoisomers of RA differentially regulate the phosphorylation status of the Stra8 protein, which was shown to exist in differently phosphorylated forms. Subcellular fractionation and immunocytochemistry studies showed that the Stra8 protein is cytoplasmic. During mouse embryogenesis, Stra8 expression was restricted to the male developing gonads, and in adult mice, the expression of Stra8 was restricted to the premeiotic germ cells. Thus, Stra8 protein may play a role in the premeiotic phase of spermatogenesis.
Oulad-Abdelghani
M
M
Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique/Institut National de la Santé et de la Recherche Médicale/Université Louis Pasteur, Collège de France, Illkirch, France.
Bouillet
P
P
Décimo
D
D
Gansmuller
A
A
Heyberger
S
S
Dollé
P
P
Bronner
S
S
Lutz
Y
Y
Chambon
P
P
D048868:Adaptor Proteins, Signal Transducing; D000595:Amino Acid Sequence; D000818:Animals; D000831:Animals, Newborn; D001483:Base Sequence; D018236:Carcinoma, Embryonal; D002460:Cell Line; D003593:Cytoplasm / Q000378:metabolism; D018076:DNA, Complementary; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D015723:Gene Library; D017403:In Situ Hybridization; D008297:Male; D008540:Meiosis; D051379:Mice; D008969:Molecular Sequence Data; D009928:Organ Specificity; D014176:Protein Biosynthesis; D011506:Proteins / Q000737:chemistry; D012333:RNA, Messenger / Q000096:biosynthesis; D013091:Spermatogenesis; D013234:Stem Cells / Q000378:metabolism; D013737:Testis / Q000166:cytology / Q000378:metabolism / Q000648:ultrastructure; D014158:Transcription, Genetic; D014212:Tretinoin / Q000494:pharmacology*; D014407:Tumor Cells, Cultured
D048868:Adaptor Proteins, Signal Transducing; D018076:DNA, Complementary; D011506:Proteins; D012333:RNA, Messenger; C102019:Stra8 protein, mouse; D014212:Tretinoin