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Characterization of the mouse matrilin-4 gene: a 5' antiparallel overlap with the gene encoding the transcription factor RBP-L

Wagener, Raimund, Kobbe, Birgit, Aszodi, Attila, Aeschlimann, Daniel and Paulsson, Mats 2001. Characterization of the mouse matrilin-4 gene: a 5' antiparallel overlap with the gene encoding the transcription factor RBP-L. Genomics 76 (1-3) , pp. 89-98. 10.1006/geno.2001.6589

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We have isolated and characterized the gene encoding mouse matrilin-4 (Matn4), an extracellular matrix protein present in a broad spectrum of tissues. The gene spanned 16 kb, consisted of 12 exons, and localized to chromosome 2. As in all known matrilin genes, the last intron, separating the exons coding for the coiled-coil domain, did not follow the GT-AG rule and belonged to the subgroup of introns having AT-AC at the ends. Matn4 contained two exons in the 5′ UTR that could be alternatively spliced. We localized a major and a minor transcription start site to two different untranslated exons: exon 0a and exon 0b. Matn4 divergently overlapped 5′ with the gene encoding RBP-L (for recombining binding protein suppressor of hairless-like; Rbpsuhl), a transcription factor with homology to RBP-J . Exon 1 of Rbpsuhl was located in the second intron of Matn4, whereas exon 0a, the first exon of Matn4, was located in the second intron of Rbpsuhl. The second exons of the respective genes overlapped in an antisense orientation. We mapped the major transcription start of Rbpsuhl to a position approximately 150 nt upstream of the splice acceptor site of the first intron, leading to the synthesis of a truncated variant of RBP-L probably missing the amino-terminal 121 amino acid residues. We analyzed the expression of the different Matn4 and Rbpsuhl transcripts by quantitative RT-PCR; this showed the highest expression for both genes in lung and brain. In situ hybridization of brain sections showed a partially overlapping expression pattern for the two genes.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Dentistry
Publisher: Elsevier
ISSN: 10898646
Last Modified: 04 Jun 2017 01:35

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