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Structure of the mouse thioredoxin-encoding gene and its processed pseudogene
M Matsui1, Y Taniguchi, K Hirota
1Department of Biological Responses, Institute for Virus Research, Kyoto University, Japan.
Gene
|January 23, 1995
Summary
Researchers characterized the mouse thioredoxin (TXN) gene, finding only one active copy and one pseudogene. This clarifies the mammalian TXN system and aids future gene targeting experiments.
Area of Science:
- Biochemistry
- Genetics
- Molecular Biology
Background:
- Thioredoxins (TXN) are crucial small proteins involved in redox regulation across diverse species.
- Previous work isolated human and mouse TXN-encoding cDNAs, setting the stage for further mammalian TXN research.
Purpose of the Study:
- To elucidate the functions of the mammalian thioredoxin system.
- To prepare for generating Txn knockout mice by characterizing the genomic structure of the mouse Txn gene.
Main Methods:
- Cloning of mouse Txn genomic DNA fragments using TXN cDNA as a probe.
- Detailed Southern blot analyses to investigate the mouse genome's TXN gene composition.
Main Results:
- The mouse thioredoxin (Txn) gene spans over 12 kb and comprises five exons and four introns.
- Mouse genome analysis revealed a single active Txn gene and one processed pseudogene (Txn-ps1).
- This contrasts with other species that possess multiple active TXN genes.
Conclusions:
- The study clarifies the genetic organization of the mouse thioredoxin system.
- Findings provide essential foundational data for future transgenic experiments, including gene targeting approaches.