Cloning of human 2H9 heterogeneous nuclear ribonucleoproteins. Relation with splicing and early heat shock-induced splicing arrest.

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Citation

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. 1997 Jan 17;272(3):1827-36.

PubMed ID
8999868 [ View in PubMed
]
Abstract

Using antibody 2H9 from our heterogeneous nuclear ribonucleoproteins (anti-hnRNP) monoclonal antibody library, we previously showed in HeLa cells that a 35-37-kDa protein doublet switches from the hnRNP complexes to the nuclear matrix following a 10-min heat shock at 45 degrees C (1 Lutz, Y., Jacob, M., and Fuchs, J. P. (1988) Exp. Cell Res. 175, 109-124). cDNA cloning and sequencing revealed an hnRNP protein (2H9) which is a new member of the hnRNP F, H/H' family. Protein 2H9 displays two consensus sequence-type RNA binding domains (CS-RBD) showing 80-90% homology with two of the three CS-RBDs of hnRNP F and H/H'. Another common feature is the presence of two glycine/tyrosine-rich auxiliary domains located at the C terminus and between the two CS-RBDs. At the functional level we show that specific anti-2H9 peptide antibodies can directly inhibit an in vitro splicing system. Moreover, the 2H9 protein doublet is no more present in nuclear extracts from such briefly stressed cells, which interestingly correlates with the inability of these extracts to catalyze in vitro splicing reactions. Taken together, our data suggest that these proteins are involved in the splicing process and also participate in early heat shock-induced splicing arrest by transiently leaving the hnRNP complexes. These 2H9 proteins, which are encoded by a single gene located on human chromosome 10, were also found to be associated with nuclear bodies in situ.

DrugBank Data that Cites this Article

Polypeptides
NameUniProt ID
Heterogeneous nuclear ribonucleoprotein H3P31942Details