Developmental Defects and Male Sterility in Mice Lacking the Ubiquitin-Like DNA Repair Gene mHR23B
Autor: | Gijsbertus T. J. van der Horst, Fumio Hanaoka, Kaoru Sugasawa, Jessica M. Y. Ng, Rudolph B. Beems, Harry Vrieling, M. P. Ooms, J. T. M. Vreeburg, Theo G M F Gorgels, J. Anton Grootegoed, Jan H.J. Hoeijmakers, Pim Visser |
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Přispěvatelé: | Molecular Genetics, Developmental Biology, Cell biology |
Rok vydání: | 2002 |
Předmět: |
Male
Saccharomyces cerevisiae Proteins DNA Repair Cell Survival Ultraviolet Rays DNA repair Placenta Saccharomyces cerevisiae Mutant Mice Transgenic Eye Cell Line Craniofacial Abnormalities Fungal Proteins Embryonic and Fetal Development Mice Ubiquitin Testis Animals Humans Spermatogenesis Molecular Biology Infertility Male Fungal protein biology Body Weight Gene targeting Dose-Response Relationship Radiation Organ Size Cell Biology Fibroblasts biology.organism_classification DNA Dynamics and Chromosome Structure Fusion protein Molecular biology DNA-Binding Proteins Fertility Gene Targeting biology.protein Female Nucleotide excision repair |
Zdroj: | Molecular and Cellular Biology, 22(4), 1233-1245. American Society for Microbiology |
ISSN: | 1098-5549 0270-7306 |
DOI: | 10.1128/mcb.22.4.1233-1245.2002 |
Popis: | mHR23B encodes one of the two mammalian homologs of Saccharomyces cerevisiae RAD23, a ubiquitin-like fusion protein involved in nucleotide excision repair (NER). Part of mHR23B is complexed with the XPC protein, and this heterodimer functions as the main damage detector and initiator of global genome NER. While XPC defects exist in humans and mice, mutations for mHR23A and mHR23B are not known. Here, we present a mouse model for mHR23B. Unlike XPC-deficient cells, mHR23B(-/-) mouse embryonic fibroblasts are not UV sensitive and retain the repair characteristics of wild-type cells. In agreement with the results of in vitro repair studies, this indicates that mHR23A can functionally replace mHR23B in NER. Unexpectedly, mHR23B(-/-) mice show impaired embryonic development and a high rate (90%) of intrauterine or neonatal death. Surviving animals display a variety of abnormalities, including retarded growth, facial dysmorphology, and male sterility. Such abnormalities are not observed in XPC and other NER-deficient mouse mutants and point to a separate function of mHR23B in development. This function may involve regulation of protein stability via the ubiquitin/proteasome pathway and is not or only in part compensated for by mHR23A. |
Databáze: | OpenAIRE |
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