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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Koshland, M. E. Cann, G. M. Matsuuchi, L. |
| Abstract | During a primary immune response, murine B lymphocytes are induced to express the gene for the immunoglobulin J chain. As a first step in determining the mechanism of induction, genomic DNA clones encoding the murine J chain were obtained from cell lines representative of B lymphocytes before and after J chain expression. Analysis of the coding regions showed that the J chain gene has a different structure from the other immunoglobulin genes. It consists of four exons organized in a simple 7.3-kilobase transcription unit that does not require DNA rearrangement or alternative processing for expression. These structural properties indicate that transcription of the J chain gene is initiated by changes in chromatin conformation, probably involving a J chain-specific DNA-binding factor. Analysis of the 5' flanking sequences of the J chain gene, on the other hand, showed that the promoter region contains two conserved elements that have been implicated in the lymphocyte-specific expression of the light chain genes. The sharing of these elements suggests that, once the J chain gene is activated, its transcription is regulated by mechanisms similar to those controlling the light chain genes. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 2 |
| Volume Number | 83 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1986-02-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Immunoglobulin J-Chains Genetics Amino Acid Sequence Animals Chromatin Ultrastructure DNA Gene Expression Regulation Genes Genetic Linkage Mice Transcription, Genetic Comparative Study Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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