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Example sentences for: rdek
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We have previously shown that activation of promyeloid cells causes dephosphorylation of DEK and diminished DEK binding to the HIV-2 long terminal repeat [ 16 17 32 ] . In this study, we show that rDEK can bind to the DQA1 Y box, and that DEK in nuclear extracts participates in the DQA1 Y-box binding complex in vitro . Thus, we propose a model in which intracellular signaling modulates the ability of DEK to bind DNA, causing alteration of MHC class II transcription.
Having established that DEK and NF-Y in nuclear extracts participate in the HLA-DQA1*0101 binding complex, we used recombinant full-length DEK (rDEK) to determine whether it alone can bind to Y-box motifs and to examine how gene- and allele-specific sequence polymorphisms alter its binding.
bp = base pair(s); EMSA = electrophoretic mobility shift assay; FLAG = Five NH 2 -terminally deleted epilope; MHC = Major histocompatibility complex; HIV = human immunodeficiency virus; JRA = juvenile rheumatoid arthritis; K d[app] = apparent dissociation constant; PCR = polymerase chain reaction; pets = peri- ets ; rDEK = recombinant DEK protein.
Finally, DEK binds differentially to specific Y-box sequences found in HLA-DQA1(*0101 and *0501 alleles) and HLA-DRA , consistent with observations of DQA1 gene-specific cell-surface expression [ 36 ] and allele-specific promoter activity [ 33 ] . The specificity of rDEK binding to these and other, related Y-box sequences (including HLA-DQB and HLA-DRB alleles associated with the DR4 haplotype) may correlate with a predisposition to autoim-mune disease seen with certain HLA haplotypes.
Further characterization of rDEK binding to the polymorphic DQA1*0501 Y-box sequence and to the consensus ( HLA-DRA ) Y-box sequence establishes a relative hierarchy of DEK binding activity (Fig.
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