| First Author | Martincic K | Year | 2009 |
| Journal | Nat Immunol | Volume | 10 |
| Issue | 10 | Pages | 1102-9 |
| PubMed ID | 19749764 | Mgi Jnum | J:152773 |
| Mgi Id | MGI:4359963 | Doi | 10.1038/ni.1786 |
| Citation | Martincic K, et al. (2009) Transcription elongation factor ELL2 directs immunoglobulin secretion in plasma cells by stimulating altered RNA processing. Nat Immunol 10(10):1102-9 |
| abstractText | Immunoglobulin secretion is modulated by competition between the use of a weak promoter-proximal poly(A) site and a nonconsensus splice site in the final secretory-specific exon of the heavy chain pre-mRNA. The RNA polymerase II transcription elongation factor ELL2, which is induced in plasma cells, enhanced both polyadenylation and exon skipping with the gene encoding the immunoglobulin heavy-chain complex (Igh) and reporter constructs. Lowering ELL2 expression by transfection of heterogenous ribonucleoprotein F (hnRNP F) or small interfering RNA resulted in lower abundance of secretory-specific forms of immunoglobulin heavy-chain mRNA. ELL2 and the polyadenylation factor CstF-64 tracked together with RNA polymerase II across the Igh mu- and gamma-gene segments; the association of both factors was blocked by ELL2-specific small interfering RNA. Thus, loading of ELL2 and CstF-64 on RNA polymerase II was linked, caused enhanced use of the proximal poly(A) site and was necessary for processing of immunoglobulin heavy-chain mRNA. |
