The expression of Usp42 during embryogenesis and spermatogenesis in mouse

Yu Kyung Kim, Yong Soo Kim, Kyong Jai Yoo, Hey Jin Lee, Dong Ryul Lee, Chang Yeol Yeo, Kwang Hyun Baek

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27 Scopus citations


Mouse Usp42, a novel ubiquitin specific protease gene, was isolated from mouse embryonic stem cells. It consists of 1,324 amino acids with a predicted molecular weight of 146 kDa and contains the conserved Cys, Asp (I), His and Asn/Asp (II) domains defined as one of characteristics for deubiquitinating enzymes. RT-PCR analysis showed that the Usp42 transcript is expressed in NIH3T3 cells, B- and T-lymphocytes, and L1210 cells. Northern blot analysis revealed that Usp42 is expressed mainly in brain, lung, thymus and testis, and at mouse E10.5 the most during embryonic development. Usp42 expression rises from 2 weeks after birth to round-spermatid stage and decreases from condensing-spermatid stage during spermatogenesis. Deubiquitinating enzyme assays demonstrated that Usp42 can cleave ubiquitin from ubiquitinated substrates in vitro and in vivo. Taken all together, it is suggested that Usp42 is one of typical deubiquitinating enzymes, which may play an important role in mouse embryogenesis and spermatogenesis.

Original languageEnglish
Pages (from-to)143-148
Number of pages6
JournalGene Expression Patterns
Issue number1-2
StatePublished - Jan 2007

Bibliographical note

Funding Information:
The authors thank the members of the Cell and Gene therapy Research Institute at Pochon CHA University, CHA General Hospital for their critical comments in the manuscript. This study was supported by a grant of the Korea Health 21 R&D Project, Ministry of Health & Welfare, Republic of Korea (01-PJ10-PG6-01GN13-0002).


  • Deubiquitination
  • Embryogenesis
  • Protein degradation
  • Spermatogenesis
  • Ubiquitin specific protease


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