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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Characterization and mapping of the gene encoding mouse proteasome subunit DELTA (Lmp19).

The proteasome subunit DELTA is unusually closely related to the major histocompatibility complex (MHC)-linked proteasome subunit, LMP2. The sequence of a mouse cDNA for DELTA confirms that this 22,100 M(r) proteasome subunit is highly conserved across species. Sequence analysis of the mouse gene encoding DELTA, designated Lmp19, indicates that it consists of six exons and five introns, similar to the Lmp2 gene. The 5' upstream region lacks a TATA regulatory sequence, which is also absent from proteasome genes isolated from Drosophila. BXD recombinant inbred (RI) mice were used to map the potential chromosomal location of Lmp19, and revealed that the DELTA subunit has related sequences present on two different mouse chromosomes, chromosomes 1 and 11. Typing of 89 progeny from a C57BL/6J X Mus spretus DNA backcross panel (BSS) confirmed the chromosome 1 assignment. Southern hybridization with a polymerase chain reaction-generated Lmp19 intron 2-specific probe indicates that the Lmp19 genomic clone corresponds to the sequence on chromosome 11, and further suggests that the chromosome 1 copy represents a processed pseudogene (Lmp19-ps1).[1]


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