The v-abl tyrosine kinase negatively regulates NF-kappa B/Rel factors and blocks kappa gene transcription in pre-B lymphocytes - PubMed (original) (raw)

. 1994 Mar 15;8(6):678-87.

doi: 10.1101/gad.8.6.678.

Affiliations

Free article

The v-abl tyrosine kinase negatively regulates NF-kappa B/Rel factors and blocks kappa gene transcription in pre-B lymphocytes

C A Klug et al. Genes Dev. 1994.

Free article

Abstract

Transformation of B-lineage precursors by the Abelson murine leukemia virus appears to arrest development at the pre-B stage. Abelson-transformed pre-B cell lines generally retain transcriptionally inactive, unrearranged immunoglobulin kappa alleles. We demonstrate that nontransformed pre-B cells expanded from the mouse bone marrow efficiently transcribe unrearranged kappa alleles. In addition, they contain activated complexes of the NF-kappa B/Rel transcription factor family, in contrast with their Abelson-transformed counterparts. Using conditionally transformed pre-B cell lines, we show that the v-abl viral transforming protein, a tyrosine kinase, blocks germ-line kappa gene transcription and negatively regulates NF-kappa B/Rel activity. An active v-abl kinase specifically inhibits the NF-kappa B/Rel-dependent kappa intron enhancer, which is implicated in promoting both transcription and rearrangement of the kappa locus. v-abl inhibits the activated state of NF-kappa B/Rel complexes in a pre-B cell via a post-translational mechanism that results in increased stability of the inhibitory subunit I kappa B alpha. This analysis suggests a molecular pathway by which v-abl inhibits kappa locus transcription and rearrangement.

PubMed Disclaimer

Similar articles

Cited by

Publication types

MeSH terms

Substances

LinkOut - more resources