Cloning of murine G1RP, a novel gene related to Drosophila melanogaster g1.

To study the nature of genes that are induced during the apoptotic death of myeloid precursor cells, we performed representational difference analysis using 32Dcl3 myeloblastic cells that were deprived of IL-3 for 24h. We have isolated a novel cDNA (g1-related protein, G1RP) that is homologous to g1, a Drosophila melanogaster zinc-finger protein that is expressed in the mesoderm. Northern blot analysis using RNAs derived from 32Dcl3 cells that have been grown in the absence of IL-3 demonstrates that the G1RP message is upregulated in these cells following the removal of IL-3, suggesting that this gene may regulate growth factor withdrawal-induced apoptosis of myeloid precursor cells.

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