Normal development of mice lacking metablastin (P19), a phosphoprotein implicated in cell cycle regulation.
Metablastin, also called P19, stathmin, prosolin, Lap18, and oncoprotein18, is a highly conserved cytosolic protein that undergoes extracellular factor- and cell cycle-regulated serine phosphorylation and developmentally regulated expression in mammals. It has been implicated in a variety of cellular functions including growth and differentiation, and recent evidence suggests an involvement in cell cycle control. To explore its potential role in mammalian development, we have disrupted the gene encoding metablastin by gene targeting in mice. The metablastin null mutants have no overt phenotype regarding development, growth rate, behavior, T cell maturation, or fertility and do not exhibit an increased predisposition to tumors. SCG10, a protein closely related in structure to metablastin, shows no compensatory up-regulation in metablastin-/- mice. Although the data suggest that metablastin is not essential for mammalian development, the knockout mice should prove valuable in exploring the role of this protein in cell cycle regulation.
Schubart
U K
UK
Department of Medicine, Albert Einstein College of Medicine, Bronx, New York 10461, USA.
Yu
J
J
Amat
J A
JA
Wang
Z
Z
Hoffmann
M K
MK
Edelmann
W
W
D000818:Animals; D002453:Cell Cycle; D002678:Chimera; D005260:Female; D015698:Genomic Library; D008198:Lymph Nodes / Q000276:immunology; D008297:Male; D008322:Mammals; D051379:Mice; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D018345:Mice, Knockout; D008822:Mice, Transgenic; D008868:Microtubule Proteins; D010750:Phosphoproteins / Q000096:biosynthesis / Q000172:deficiency* / Q000235:genetics*; D012333:RNA, Messenger / Q000032:analysis / Q000096:biosynthesis; D051381:Rats; D011948:Receptors, Antigen, T-Cell / Q000096:biosynthesis; D011994:Recombinant Proteins / Q000096:biosynthesis; D011995:Recombination, Genetic; D013154:Spleen / Q000276:immunology; D050777:Stathmin; D013234:Stem Cells; D013601:T-Lymphocytes / Q000276:immunology; D013950:Thymus Gland / Q000276:immunology; D014158:Transcription, Genetic
D008868:Microtubule Proteins; D010750:Phosphoproteins; D012333:RNA, Messenger; D011948:Receptors, Antigen, T-Cell; D011994:Recombinant Proteins; D050777:Stathmin; C493994:Stmn1 protein, mouse