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Volume 271, Number 24,
Issue of June 14, 1996
pp. 14062-14066
©1996 by The American Society for Biochemistry and Molecular Biology, Inc.
Normal Development of Mice Lacking Metablastin (P19), a
Phosphoprotein Implicated in Cell Cycle Regulation
(Received for publication, December 22, 1995, and in revised form, March 22, 1996)
Ulrich K.
Schubart
§
,
Jinghua
Yu
§
,
Jose A.
Amat
,
Zhi-qin
Wang
''
,
Michael K.
Hoffmann
''
and
Winfried
Edelmann
From the Departments of Medicine,
§ Molecular Pharmacology, Neurology, and
Molecular Genetics, Albert Einstein
College of Medicine, Bronx, New York 10461 and the '' Department of
Immunology, New York Medical College, Valhalla,
New York 10595
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.

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Copyright © 1996 by the American Society for Biochemistry and Molecular Biology.
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