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Molecular and Cellular Biology, April 2000, p. 2498-2504, Vol. 20, No. 7
0270-7306/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Expression and Functional Analysis of
Uch-L3 during Mouse Development
Laurie Jo
Kurihara,
Ekaterina
Semenova,
John M.
Levorse, and
Shirley M.
Tilghman*
Howard Hughes Medical Institute and
Department of Molecular Biology, Princeton University, Princeton,
New Jersey 08544
Received 16 December 1999/Accepted 21 December 1999
Mice homozygous for the s1Acrg deletion at
the Ednrb locus arrest at embryonic day 8.5. To determine
the molecular basis of this defect, we initiated positional cloning of
the s1Acrg minimal region. The mouse
Uch-L3 (ubiquitin C-terminal hydrolase L3) gene was mapped
within the s1Acrg minimal region. Because
Uch-L3 transcripts were present in embryonic structures
relevant to the s1Acrg phenotype, we created a
targeted mutation in Uch-L3 to address its role during
development and its possible contribution to the s1Acrg phenotype. Mice homozygous for the
mutation Uch-L3
3-7 were viable, with no
obvious developmental or histological abnormalities. Although high
levels of Uch-L3 RNA were detected in testes and thymus,
Uch-L3
3-7 homozygotes were fertile, and no
defect in intrathymic T-cell differentiation was detected. We conclude
that the s1Acrg phenotype is either complex and
multigenic or due to the loss of another gene within the region. We
propose that Uch-L3 may be functionally redundant with its
homologue Uch-L1.
*
Corresponding author. Mailing address: Department of
Molecular Biology, Princeton University, Princeton, NJ 08544. Phone: (609) 258-2900. Fax: (609) 258-3345. E-mail:
stilghman{at}molbio.princeton.edu.
Molecular and Cellular Biology, April 2000, p. 2498-2504, Vol. 20, No. 7
0270-7306/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
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