DESCRIPTION:BRD2, like other human members of the BET family of chromatin-binding proteins (BRD3, BRD4, BRDT), comprises two bromodomains, protein modules that bind epsilon-N-acetyllysine residues. When overexpressed in 293 cells, BRD2, along with BRD3, binds the hyperacetylated chromatin of transcribed genes, regions enriched in acetylated histone H4 lysine-5 (H4K5Ac), H4K12Ac, H3K14Ac, but deficient in H4K16Ac and H3K9me. A single H4K5AcK12Ac peptide can bind two copies of BRD2-2 (BRD2, bromodomain 2), each interacting with one of the two acetylated lysines. In an in vitro RNA polymerase II transcription system, binding of either BRD2 or BRD3 to a chromatin template assembled with hyperacetylated histones enabled transcription through the nucleosomes. Further, BRD2 displayed histone chaperone activity, catalyzing the transfer of histone octamers from hyperacetylated oligonucleosomes to a labeled 190 bp 5s rDNA fragment. Like BRD4, BRD2 is a ubiquitously expressed transcriptional regulator and atypical protein kinase, with functions in cell cycle progression and embryogenesis. BRD2 binds preferentially to hyperacetylated histone H4 in H2A.Z-containing nucleosomes and this interaction is required for activation of androgen receptor (AR)-regulated genes in prostate cancer cells. In addition to prostate cancer, leukemia is a potential indication for specific BRD2 inhibition. BRD2 suppresses HIV transcription in latently infected cells and may therefore represent a target in therapeutic strategies involving viral reactivation.
ACCESSION #: NM_005104
Uniprot Link
INCLUDES AMINO ACIDS: 344-454
TAG(S): N-terminal His-tag
MW: 15.7 kDa
EXPRESSION SYSTEM: E. coli
SUPPLIED AS: Solution of purified recombinant protein in 20 mM Tris pH 7.5, 150 mM NaCl, 1.0 mM TCEP, 10% glycerol (v/v) as determined by OD280
STORAGE: -80°C, aliquot and snap-freeze after first use.
View Product Data Sheet
Substantial Discounts Available on Bulk Quantities
We also offer assay services for BRD2-2 (His).
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ReactionBiology详细产品列表：货号产品价格（美元）HMT-11-376ASH1L(His)Methyltransferase325DMT-21-124DNMT1450DMT-21-125DNMT3aMethyltransferase450DMT-21-126 DNMT3b450HMT-11-101DOT1LMethyltransferase395HMT-25-115 EZH1Complex450HMT-25-114EZH2Complex799HMT-25-173EZH2-Y641FComplex799HMT-11-102G9aMethyltransferase(GST)(aa786-1210)299HMT-11-245G9aMethyltransferase(His)(aa913-1193)299HMT-12-104G9a/GLPComplexMethyltransferase325HMT-11-103GLPMethyltransferaseProtein299HMT-15-105MLL1Complex499HMT-15-106 MLL2Complex499HMT-15-107MLL3Complex499HMT-15-108 MLL4Complex499MT-11-359NNMT(GST)(NicotinamideN-Methyltransferase)299MT-11-358NNMT(His)(NicotinamideN-Methyltransferase)299HMT-11-319NRMT1(GST)325HMT-21-139NSD1Methyltransferase450HMT-21-1380NSD2(His)Methyltransferase450HMT-21-122 NSD2Methyltransferase550HMT-11-377NSD2SET(His)325HMT-21-159NSD2-E1099KMethyltransferase599HMT-11-378NSD2-E1099K-SET(His)325HMT-21-181NSD2-T1150AMethyltransferase450HMT-11-379NSD2-T1150A-SET(His)325HMT-11-132 NSD3Methyltransferase325HMT-21-348PRDM2Methyltransferase325HMT-21-152PRDM9Methyltransferase450HMT-11-119PRMT1Methyltransferase325HMT-11-113PRMT3Methyltransferase325HMT-11-120PRMT4Methyltransferase399HMT-21-172PRMT5Methyltransferase450HMT-22-434PRMT5(C449S)/MEP50799HMT-22-148PRMT5/MEP50Complex799HMT-11-121PRMT6Methyltransferase(GST)325HMT-21-380PRMT6Methyltransferase(His)325HMT-21-382PRMT7(His)450HMT-11-135PRMT8Methyltransferase325MT-11-356s-COMT(His)(SolubleCatechol-O-Methyltransferase)299MT-11-357s-COMT(V108M)(His)(SolubleCatechol-O-Methyltransferase）299HMT-15-116 SET1AComplex(5-subunits)499HMT-15-117SET1BComplex(5-subunits)499HMT-11-133SET7/9Methyltransferase299HMT-11-476SET8(GST)299HMT-11-118 SET8Methyltransferase299HMT-11-128 SETD2(GST)Methyltransferase299HMT-11-129SETD2(His)Methyltransferase299HMT-11-110SMYD2Methyltransferase325HMT-11-111SUV39H1Methyltransferase299HMT-11-418SUV39H2(GST)Methyltransferase299HMT-11-112SUV39H2(His)Methyltransferase299HMT-21-149SUV420H1-tv1Methyltransferase450HMT-21-150SUV420H1-tv2Methyltransferase450HMT-21-349SUV420H2Methyltransferase325HMT-14-109WRAD2375HMT-14-438(H3.3-H4)2Tetramer325HMT-35-435CoreHistones(Chicken)250HMT-11-184Fibrillarin(GST)325HMT-11-183Fibrillarin(His)325HMT-11-137GST-GAR299HMT-12-316H2A/H2Bdimers325HMT-11-180HistoneH1.050HMT-11-146HistoneH2A50HMT-11-147HistoneH2B50HMT-11-134 HistoneH3.350HMT-35-179Nucleosomes(ChickenMono/Di)280HMT-35-182Nucleosomes(ChickenOligo/PolyH5Enriched)280
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不同的酶Km值不同，同一种酶与不同底物反应Km值也不同，Km值可近似的反应酶与底物的亲和力大小：Km值大，表明亲和力小；Km值小，表明亲合力大。
Km最小的那个底物，就是酶的最适底物。
反应底物——葡萄糖
反应产物——ATP、乙醇、CO2或ATP、乳酸
有氧呼吸：
反应底物——葡萄糖
反应产物——ATP、CO2、H2O
1，底物DNA上没有该限制酶的识别、切断位点。特别是一些经过重组等处理的DNA，碱基易发生缺失、变化等。
2，限制酶识别位点上的A或C被甲基化。部分限制酶对识别位点中的碱基是否被甲基化比较敏感，从而无法切断该位点。
3，底物不纯。如果底物DNA中有限制酶阻害物质，回影响限制酶的酶切作用。在此种情况下，底物DNA须重新进行精制。
4，限制酶的识别、切断位点在底物DNA的高级构造中所处的位置，对酶切反应也有一定的影响，例如,限制酶NaeI在切断pBR322DNA时,就有着非常难以切断的部位。
5，限制性内切酶本身无活性或低活性
