alexa Recruitment of heterogeneous nuclear ribonucleoprotein A1 in vivo to the LMP TAP region of the major histocompatibility complex.
Biomedical Sciences

Biomedical Sciences

Journal of Biomolecular Research & Therapeutics

Author(s): Donev R, Horton R, Beck S, Doneva T, Vatcheva R,

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Abstract Sequences containing the matrix recognition signature were identified adjacent to the LMP/TAP gene cluster in the human and mouse major histocompatibility complex class II region. These sequences were shown to function as nuclear matrix attachment regions (MARs). Three of the five human MARs and the single mouse MAR recruit heterogeneous nuclear ribonucleoprotein A1 (hnRNP-A1) in vivo during transcriptional up-regulation of the major histocompatibility complex class II genes. The timing of this recruitment correlates with a rise in mature TAP1 mRNA. Two of the human MARs bind hnRNP-A1 in vitro directly within a 35-bp sequence that shows over 90\% similarity to certain Alu repeat sequences. This study shows that MARs recruit and bind hnRNP-A1 upon transcriptional up-regulation. This article was published in J Biol Chem and referenced in Journal of Biomolecular Research & Therapeutics

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