Cloning and characterization of the mouse interleukin enhancer binding factor 3 (Ilf3) homolog in a screen for RNA binding proteins

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Cloning and characterization of the mouse interleukin enhancer binding factor 3 (Ilf3) homolog in a screen for RNA binding proteins

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Title: Cloning and characterization of the mouse interleukin enhancer binding factor 3 (Ilf3) homolog in a screen for RNA binding proteins
Author: Disteche, Christine; Edelhoff, Susanne; Braun, Robert E.; Buass, F. William; Lee, Keesook
Abstract: In a screen for RNA-binding proteins expressed during murine spermatogenesis, we have identified a cDNA that encodes a protein of 911 amino acids that contains two copies of the double-stranded RNA-binding motif and has 80% identity with human Interleukin Enhancer Binding Factor 3 (ILF3). Linkage and cytogenetic analyses localized the Ilf3 cDNA to a portion of mouse Chr 9, which shows conserved synteny with a region of human Chr 19 where the human ILF3 gene had been previously localized, supporting that we had cloned the murine homolog of ILF3. Northern analysis indicated the Ilf3 gene is ubiquitously expressed in mouse adult tissues with high levels of expression in the brain, thymus, testis, and ovary. Polyclonal antibodies detected multiple protein species in a subset of the tissues expressing Ilf3 RNA. Immunoreactive species are present at high levels in the thymus, testis, ovary, and the spleen to a lesser extent. The high degree of sequence similarity between the mouse ILF3 protein and other dsRNA binding motif-containing proteins suggests a role in RNA metabolism, while the differential expression indicates the mouse ILF3 protein predominantly functions in tissues containing developing lymphocyte and germ cells.
URI: http://hdl.handle.net/1773/4456

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