Heterogeneous nuclear ribonucleoprotein D0 (HNRNPD) also known as AU-rich element RNA-binding protein 1 (AUF1) is a protein that in humans is encoded by the HNRNPDgene.[5][6]Alternative splicing of this gene results in four transcript variants.
Function
This gene belongs to the subfamily of ubiquitously expressed heterogeneous nuclear ribonucleoproteins (hnRNPs). The hnRNPs are nucleic acid binding proteins and they complex with heterogeneous nuclear RNA (hnRNA). The interaction sites on the RNA are frequently biased towards particular sequence motifs.[7] These proteins are associated with pre-mRNAs in the nucleus and appear to influence pre-mRNA processing and other aspects of mRNA metabolism and transport. While all of the hnRNPs are present in the nucleus, some seem to shuttle between the nucleus and the cytoplasm. The hnRNP proteins have distinct nucleic acid binding properties. The protein encoded by this gene has two repeats of quasi-RRM domains that bind to RNAs. It localizes to both the nucleus and the cytoplasm. This protein is implicated in the regulation of mRNA stability.[6]
Interactions
HnRNP D has been shown to interact with SAFB[8] and Hsp27.[9] It also has been reported to interact with mRNAs such as Mef2c mRNA.[10]
^Arao Y, Kuriyama R, Kayama F, Kato S (August 2000). "A nuclear matrix-associated factor, SAF-B, interacts with specific isoforms of AUF1/hnRNP D". Arch. Biochem. Biophys. 380 (2): 228–36. doi:10.1006/abbi.2000.1938. PMID10933876.
Wagner BJ, Long L, Rao PN, Pettenati MJ, Brewer G (June 1996). "Localization and physical mapping of genes encoding the A+U-rich element RNA-binding protein AUF1 to human chromosomes 4 and X". Genomics. 34 (2): 219–22. doi:10.1006/geno.1996.0269. PMID8661052.
Wagner BJ, DeMaria CT, Sun Y, Wilson GM, Brewer G (March 1998). "Structure and genomic organization of the human AUF1 gene: alternative pre-mRNA splicing generates four protein isoforms". Genomics. 48 (2): 195–202. doi:10.1006/geno.1997.5142. PMID9521873.
Nagata T, Kurihara Y, Matsuda G, Saeki J, Kohno T, Yanagida Y, Ishikawa F, Uesugi S, Katahira M (March 1999). "Structure and interactions with RNA of the N-terminal UUAG-specific RNA-binding domain of hnRNP D0". J. Mol. Biol. 287 (2): 221–37. doi:10.1006/jmbi.1999.2616. PMID10080887.
Blaxall BC, Dwyer-Nield LD, Bauer AK, Bohlmeyer TJ, Malkinson AM, Port JD (June 2000). "Differential expression and localization of the mRNA binding proteins, AU-rich element mRNA binding protein (AUF1) and Hu antigen R (HuR), in neoplastic lung tissue". Mol. Carcinog. 28 (2): 76–83. doi:10.1002/1098-2744(200006)28:2<76::AID-MC3>3.0.CO;2-0. PMID10900464. S2CID25180996.
Moraes KC, Quaresma AJ, Maehnss K, Kobarg J (January 2003). "Identification and characterization of proteins that selectively interact with isoforms of the mRNA binding protein AUF1 (hnRNP D)". Biol. Chem. 384 (1): 25–37. doi:10.1515/BC.2003.004. PMID12674497. S2CID30993043.
Arao Y, Kuriyama R, Kayama F, Kato S (2000). "A nuclear matrix-associated factor, SAF-B, interacts with specific isoforms of AUF1/hnRNP D". Arch. Biochem. Biophys. 380 (2): 228–236. doi:10.1006/abbi.2000.1938. PMID10933876.
Katahira M, Miyanoiri Y, Enokizono Y, Matsuda G, Nagata T, Ishikawa F, Uesugi S (August 2001). "Structure of the C-terminal RNA-binding domain of hnRNP D0 (AUF1), its interactions with RNA and DNA, and change in backbone dynamics upon complex formation with DNA". J. Mol. Biol. 311 (5): 973–88. doi:10.1006/jmbi.2001.4862. PMID11531333.