The transcription factor BSAP (NF-HB) is essential for immunoglobulin germ-line ε transcription

Fang Liao, Barbara K. Birshtein, Meinrad Busslinger, Paul Rothman

Research output: Contribution to journalArticle

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Abstract

Treatment of murine splenic B lymphocytes and certain B-lineage cell lines with mitogen (LPS) and the lymphokine IL-4 has been shown to induce expression of germ-line ε transcripts (lε transcripts) and class switching to the Cε gene. Three protein complexes, one of which (complex 3) is constitutively expressed, have been shown to bind to a 179-base pair LPS/IL- 4-responsive lε promoter (Rothman, P., S. C. Li, B. Gorham, L. Glimcher, F. W. Alt, and M. Boothby, 1991. Mol. Cell. Biol. 11:5551). Complex 3 is indispensable for this inducible promoter activity. In this report, we have used electrophoretic mobility shift assays (EMSA) to demonstrate that the early B cell-specific transcription factor (BSAP) is involved in the formation of complex 3. In addition, BSAP is implicated functionally in lε transcription because a BSAP binding site either from a sea urchin histone promoter (H2A-2.2) or from 5' of murine immunoglobulin Sγ2a can substitute for the ε-associated site (ε(foot), as assayed by transient transfection assays of the lε:CAT reporter constructs into the M12.4.1 B cell line. Like the sea urchin histone BSAP site, the complex 3 binding site (ε(foot)) functions as an upstream promoter element when assayed in the OVEC vector. These results indicate that BSAP is an essential protein required for LPS/IL- 4 induction of the lε promoter. In addition, experiments showing that a BSAP binding site from 5' of Sγ2a also functions as an upstream promoter element in OVEC suggest a potential role for BSAP in regulation of the IgG2a isotype.

Original languageEnglish (US)
Pages (from-to)2904-2911
Number of pages8
JournalJournal of Immunology
Volume152
Issue number6
StatePublished - Mar 15 1994

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Germ Cells
Interleukin-4
Immunoglobulins
Transcription Factors
Sea Urchins
Binding Sites
Histones
Foot
PAX5 Transcription Factor
B-Lymphocytes
Immunoglobulin Class Switching
Cell Line
Lymphokines
Electrophoretic Mobility Shift Assay
Mitogens
Base Pairing
Transfection
Proteins
Genes

ASJC Scopus subject areas

  • Immunology

Cite this

Liao, F., Birshtein, B. K., Busslinger, M., & Rothman, P. (1994). The transcription factor BSAP (NF-HB) is essential for immunoglobulin germ-line ε transcription. Journal of Immunology, 152(6), 2904-2911.

The transcription factor BSAP (NF-HB) is essential for immunoglobulin germ-line ε transcription. / Liao, Fang; Birshtein, Barbara K.; Busslinger, Meinrad; Rothman, Paul.

In: Journal of Immunology, Vol. 152, No. 6, 15.03.1994, p. 2904-2911.

Research output: Contribution to journalArticle

Liao, F, Birshtein, BK, Busslinger, M & Rothman, P 1994, 'The transcription factor BSAP (NF-HB) is essential for immunoglobulin germ-line ε transcription', Journal of Immunology, vol. 152, no. 6, pp. 2904-2911.
Liao F, Birshtein BK, Busslinger M, Rothman P. The transcription factor BSAP (NF-HB) is essential for immunoglobulin germ-line ε transcription. Journal of Immunology. 1994 Mar 15;152(6):2904-2911.
Liao, Fang ; Birshtein, Barbara K. ; Busslinger, Meinrad ; Rothman, Paul. / The transcription factor BSAP (NF-HB) is essential for immunoglobulin germ-line ε transcription. In: Journal of Immunology. 1994 ; Vol. 152, No. 6. pp. 2904-2911.
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