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2001: Saunders L R; Jurecic V; Barber G N
The 90- and 110-kDa human NFAR proteins are translated from two differentially spliced mRNAs encoded on chromosome 19p13.
Genomics 2001;71(2):256-9.
The NFAR gene (nuclear factor associated with dsRNA) encodes a putative transcription-associated factor that we have shown is a substrate for the interferon-inducible, dsRNA-dependent protein kinase, PKR. However, our protein expression analysis has revealed that NFAR exists as two major protein species of 90 kDa (NFAR-1) and 110 kDa (NFAR-2) in the cell. To resolve the genetic identity of NFAR-1 and -2, we carried out sequence analysis of genomic and cDNA NFAR clones and determined that the coding region of this gene spans 16.2 kb and comprises 21 exons. Our data indicate that NFAR-1 and -2 arise from a single gene on chromosome 19p13 and are generated through alternative splicing events. NFAR-1 (HGMW-approved symbol ILF3) was found to comprise 1 extra exon, 18, that contains several stop codons to ensure termination of the protein at amino acid 702. In contrast, NFAR-2 lacks this exon, though it comprises an additional 3 coding exons (exons 19, 20, and 21) located at the carboxyl region to generate an extended product of 894 amino acids. Our studies, the first to elucidate the gene structure and chromosomal assignment of NFAR, establish the genetic basis for future NFAR research in humans.

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