HNRPH3 explained

Heterogeneous nuclear ribonucleoprotein H3 is a protein that in humans is encoded by the HNRNPH3 gene.^{[1] [2]}

This gene belongs to the subfamily of ubiquitously expressed heterogeneous nuclear ribonucleoproteins (hnRNPs). The hnRNPs are RNA binding proteins and they complex with heterogeneous nuclear RNA (hnRNA).

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 is localized in nuclear bodies of the nucleus. This protein is involved in the splicing process and it also participates in early heat shock-induced splicing arrest by transiently leaving the hnRNP complexes. Multiple alternative transcript variants seem to be present for this gene and some appear to have intronic regions in the mRNA. Presently, only two transcript variants are fully described.

Further reading

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• Yu W, Andersson B, Worley KC, etal . Large-scale concatenation cDNA sequencing. . Genome Res. . 7 . 4 . 353–8 . 1997 . 9110174 . 10.1101/gr.7.4.353. 139146 .
• Suzuki Y, Yoshitomo-Nakagawa K, Maruyama K, etal . Construction and characterization of a full length-enriched and a 5'-end-enriched cDNA library. . Gene . 200 . 1–2 . 149–56 . 1997 . 9373149 . 10.1016/S0378-1119(97)00411-3 .
• Honoré B . The hnRNP 2H9 gene, which is involved in the splicing reaction, is a multiply spliced gene. . Biochim. Biophys. Acta . 1492 . 1 . 108–19 . 2000 . 10858537 . 10.1016/s0167-4781(00)00092-0.
• Mahé D, Fischer N, Décimo D, Fuchs JP . Spatiotemporal regulation of hnRNP M and 2H9 gene expression during mouse embryonic development. . Biochim. Biophys. Acta . 1492 . 2–3 . 414–24 . 2000 . 11004512 . 10.1016/s0167-4781(00)00144-5.
• Yagüe J, Vázquez J, López de Castro JA . A post-translational modification of nuclear proteins, N(G),N(G)-dimethyl-Arg, found in a natural HLA class I peptide ligand. . Protein Sci. . 9 . 11 . 2210–7 . 2001 . 11152131 . 10.1110/ps.9.11.2210 . 2144492 .
• Andersen JS, Lyon CE, Fox AH, etal . Directed proteomic analysis of the human nucleolus. . Curr. Biol. . 12 . 1 . 1–11 . 2002 . 11790298 . 10.1016/S0960-9822(01)00650-9 . 14132033 . free . 2002CBio...12....1A .
• Strausberg RL, Feingold EA, Grouse LH, etal . Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences. . Proc. Natl. Acad. Sci. U.S.A. . 99 . 26 . 16899–903 . 2003 . 12477932 . 10.1073/pnas.242603899 . 139241 . 2002PNAS...9916899M . free .
• Ota T, Suzuki Y, Nishikawa T, etal . Complete sequencing and characterization of 21,243 full-length human cDNAs. . Nat. Genet. . 36 . 1 . 40–5 . 2004 . 14702039 . 10.1038/ng1285 . free .
• Gerhard DS, Wagner L, Feingold EA, etal . The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC). . Genome Res. . 14 . 10B . 2121–7 . 2004 . 15489334 . 10.1101/gr.2596504 . 528928 .
• Rush J, Moritz A, Lee KA, etal . Immunoaffinity profiling of tyrosine phosphorylation in cancer cells. . Nat. Biotechnol. . 23 . 1 . 94–101 . 2005 . 15592455 . 10.1038/nbt1046 . 7200157 .
• Andersen JS, Lam YW, Leung AK, etal . Nucleolar proteome dynamics. . Nature . 433 . 7021 . 77–83 . 2005 . 15635413 . 10.1038/nature03207 . 2005Natur.433...77A . 4344740 .
• Stelzl U, Worm U, Lalowski M, etal . A human protein-protein interaction network: a resource for annotating the proteome. . Cell . 122 . 6 . 957–68 . 2005 . 16169070 . 10.1016/j.cell.2005.08.029 . 11858/00-001M-0000-0010-8592-0 . 8235923 . free .
• Olsen JV, Blagoev B, Gnad F, etal . Global, in vivo, and site-specific phosphorylation dynamics in signaling networks. . Cell . 127 . 3 . 635–48 . 2006 . 17081983 . 10.1016/j.cell.2006.09.026 . 7827573 . free .
• Ewing RM, Chu P, Elisma F, etal . Large-scale mapping of human protein-protein interactions by mass spectrometry. . Mol. Syst. Biol. . 3 . 1. 89 . 2007 . 17353931 . 10.1038/msb4100134 . 1847948 .

Notes and References

1. Mahe D, Mahl P, Gattoni R, Fischer N, Mattei MG, Stevenin J, Fuchs JP . Cloning of human 2H9 heterogeneous nuclear ribonucleoproteins. Relation with splicing and early heat shock-induced splicing arrest . J Biol Chem . 272 . 3 . 1827–36 . Feb 1997 . 8999868 . 10.1074/jbc.272.3.1827 . free .
2. Web site: Entrez Gene: HNRPH3 heterogeneous nuclear ribonucleoprotein H3 (2H9).