Characterization of a protein that binds a negative regulatory element in the mammary-specific whey acidic protein promoter

Andreas Kolb, R Albang, G Brem, V Erfle, W H Gunzburg, B Salmons

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    7 Citations (Scopus)

    Abstract

    Whey Acidic Protein (WAP) gene expression is restricted to the pregnant and lactating mammary gland. We have recently defined a negative regulatory element (NRE) in the WAP promoter which interacts with a factor (NBF) present in all nonWAP expressing cells (Kolb et al., 1994; J. Cell. Biochem. 56:245-261). Here we characterise this factor and show that although it is not related to a number of known transcription factors, including AP-1, NF-1 and SP-1, it may also be involved in controlling the expression from the mouse mammary tumour vints promoter. Three proteins that bind to the WAP-NRE have been identified, one of which is a 53 kDa nuclear protein. This protein is present in nonWAP expressing cells, suggesting that it is responsible for limiting WAP expression to the pregnant and lactating mammary gland. This protein has been partially purified and its binding to the WAP-NRE is not appreciably affected by high salt concentrations. (C) 1995 Academic Press, Inc.

    Original languageEnglish
    Pages (from-to)1045-1052
    Number of pages8
    JournalBiochemical and Biophysical Research Communications
    Volume217
    Issue number3
    DOIs
    Publication statusPublished - 26 Dec 1995

    Keywords

    • transcription factor
    • gene promoter
    • tumor virus
    • upstream sequences
    • DNA-binding
    • hormone
    • expression
    • cells
    • invitro
    • gland

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