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Published on: December 21, 2011
Molecular cloning and expression analysis of a putative nuclear protein, SR-25
K Sasahara1, T Yamaoka, M Moritani
1Department of Pediatrics, School of Medicine, Tokushima, 770-8503, Japan.
Abstract:
We cloned a full-length mouse cDNA and its human homologue encoding a novel protein designated as "SR-25." In Northern blot analysis, SR-25 mRNA was expressed in all organs tested, and relatively abundant in testis and thymus. Deduced amino acid sequences of mouse SR-25 and human SR-25 showed 77.7% identity. SR-25 has a serine-arginine repeat (SR repeat) and two types of amino acid clusters: a serine cluster and a highly basic cluster. Based on the presence of many nuclear localizing signals and a similarity to RNA splicing proteins, SR-25 is strongly suggested to be a nuclear protein and may contribute to RNA splicing.
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