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Contiguous arrangement of p45 NFE2, HnRNP A1, and HP1 alpha on mouse chromosome 15 and human chromosome 12: evidence for suppression of these genes due to retroviral integration within the Fli-2 locus.
Genes Chromosomes Cancer. 2001 Jan; 30(1):91-5.GC

Abstract

Fli-2 is a common site of proviral integration in multistage erythroleukemia cells induced by Friend murine leukemia virus (F-MuLV) or the polycythemia strain of Friend leukemia virus (FV-P). Previously, we reported that integration of Friend virus into the Fli-2 locus in CB3, an erythroleukemia cell line that harbors a homozygous inactivation of the Fli-2 locus, results in the loss of expression of two genes encoding the 45-kDa subunit of the erythroid-specific nuclear factor p45 NFE2 and the splicing factor HnRNP A1. Here, we report the identification of a third gene, Heterochromatin protein 1 (HP1alpha, also known as CBX5), which is located downstream of HnRNP A1, and p45 NFE2. Northern blot analysis revealed that the expression of HP1alpha, along with p45 NFE2 and HnRNP A1, is either undetectable or substantially reduced in CB3 cells, suggesting that HP1alpha expression is also regulated by proviral insertion within the Fli-2 locus in CB3 cells. Because p45 NFE2 was previously mapped to mouse chromosome 15, our results demonstrate that HP1alpha and HnRNP A1 are also located on mouse chromosome 15 and that the p45 NFE2, HnRNP A1, and HP1alpha genes are arranged contiguously. Contiguous arrangement of these three genes was also detected in man; this consequently localizes HP1alpha to human chromosome band 12q13.

Authors+Show Affiliations

Sunnybrook and Women's College Health Sciences Centre, Division of Cancer Biology Research, Toronto, Canada.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

11107181

Citation

Li, Y J., et al. "Contiguous Arrangement of P45 NFE2, HnRNP A1, and HP1 Alpha On Mouse Chromosome 15 and Human Chromosome 12: Evidence for Suppression of These Genes Due to Retroviral Integration Within the Fli-2 Locus." Genes, Chromosomes & Cancer, vol. 30, no. 1, 2001, pp. 91-5.
Li YJ, Pak BJ, Higgins RR, et al. Contiguous arrangement of p45 NFE2, HnRNP A1, and HP1 alpha on mouse chromosome 15 and human chromosome 12: evidence for suppression of these genes due to retroviral integration within the Fli-2 locus. Genes Chromosomes Cancer. 2001;30(1):91-5.
Li, Y. J., Pak, B. J., Higgins, R. R., Lu, S. J., & Ben-David, Y. (2001). Contiguous arrangement of p45 NFE2, HnRNP A1, and HP1 alpha on mouse chromosome 15 and human chromosome 12: evidence for suppression of these genes due to retroviral integration within the Fli-2 locus. Genes, Chromosomes & Cancer, 30(1), 91-5.
Li YJ, et al. Contiguous Arrangement of P45 NFE2, HnRNP A1, and HP1 Alpha On Mouse Chromosome 15 and Human Chromosome 12: Evidence for Suppression of These Genes Due to Retroviral Integration Within the Fli-2 Locus. Genes Chromosomes Cancer. 2001;30(1):91-5. PubMed PMID: 11107181.
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TY - JOUR T1 - Contiguous arrangement of p45 NFE2, HnRNP A1, and HP1 alpha on mouse chromosome 15 and human chromosome 12: evidence for suppression of these genes due to retroviral integration within the Fli-2 locus. AU - Li,Y J, AU - Pak,B J, AU - Higgins,R R, AU - Lu,S J, AU - Ben-David,Y, PY - 2000/12/7/pubmed PY - 2001/3/3/medline PY - 2000/12/7/entrez SP - 91 EP - 5 JF - Genes, chromosomes & cancer JO - Genes Chromosomes Cancer VL - 30 IS - 1 N2 - Fli-2 is a common site of proviral integration in multistage erythroleukemia cells induced by Friend murine leukemia virus (F-MuLV) or the polycythemia strain of Friend leukemia virus (FV-P). Previously, we reported that integration of Friend virus into the Fli-2 locus in CB3, an erythroleukemia cell line that harbors a homozygous inactivation of the Fli-2 locus, results in the loss of expression of two genes encoding the 45-kDa subunit of the erythroid-specific nuclear factor p45 NFE2 and the splicing factor HnRNP A1. Here, we report the identification of a third gene, Heterochromatin protein 1 (HP1alpha, also known as CBX5), which is located downstream of HnRNP A1, and p45 NFE2. Northern blot analysis revealed that the expression of HP1alpha, along with p45 NFE2 and HnRNP A1, is either undetectable or substantially reduced in CB3 cells, suggesting that HP1alpha expression is also regulated by proviral insertion within the Fli-2 locus in CB3 cells. Because p45 NFE2 was previously mapped to mouse chromosome 15, our results demonstrate that HP1alpha and HnRNP A1 are also located on mouse chromosome 15 and that the p45 NFE2, HnRNP A1, and HP1alpha genes are arranged contiguously. Contiguous arrangement of these three genes was also detected in man; this consequently localizes HP1alpha to human chromosome band 12q13. SN - 1045-2257 UR - https://www.unboundmedicine.com/medline/citation/11107181/Contiguous_arrangement_of_p45_NFE2_HnRNP_A1_and_HP1_alpha_on_mouse_chromosome_15_and_human_chromosome_12:_evidence_for_suppression_of_these_genes_due_to_retroviral_integration_within_the_Fli_2_locus_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=1045-2257&date=2001&volume=30&issue=1&spage=91 DB - PRIME DP - Unbound Medicine ER -