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Nucleotide Analogs - Jena Bioscience

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Recombinant Proteins<br />

166<br />

p52<br />

(Transcriptional Coactivator)<br />

human, Recombinant, E. coli<br />

Cat. No. Amount Price (€)<br />

PR-728 10 µg 400,--<br />

Liquid. Supplied in 20 mM Tris-HCl, pH 7.9, 100 mM<br />

KCl, 0.2 mM EDTA, 1 mM DTT, 20% glycerol.<br />

The human p52 protein is a non-TAF transcription<br />

coactivator that mediates activator-dependent<br />

transcription by RNA Polymerase II. The function<br />

of p52 is through interactions with transcriptional<br />

activators and the basal transcription machinery. In<br />

addition, p52 could also interact with several cellular<br />

proteins including the transcription coactivator PC4,<br />

the essential splicing factor ASF/SF2 and the nuclear<br />

protein nucleolin.<br />

Recombinant p52 protein (wild type, 333 amino acids)<br />

is isolated from an E. coli strain that carries the coding<br />

sequence of human p52 under the control of T7<br />

promoter and purifi ed by the combination of an affi nity<br />

column and FPLC chromatography.<br />

Recombinant p52 has been utilized for in vitro function<br />

studies, including transcription, splicing, protein-DNA/<br />

RNA and protein-protein interactions.<br />

Protein is greater than 95% homogeneous and<br />

contains no detectable protease, DNase, and RNase<br />

activity.<br />

Unit defi nition:<br />

1 unit equals 1 ng of purifi ed protein. 1 unit is suffi cient<br />

for a gel mobility shift assay in a 20 µl reaction;<br />

20 units are suffi cient for reconstituted transcription<br />

assay and 100 units are suffi cient for a protein-protein<br />

interaction assay.<br />

Purity: > 95% by SDS-PAGE.<br />

Store: -80 °C<br />

Selected references:<br />

Ge et al. (1998) Isolation of cDNAs encoding novel transcription<br />

coactivators p52 and p75 reveals an alternate regulatory<br />

mechanism of transcriptional activation. EMBO J. 17:6723.<br />

Ge et al. (1998) A novel transcriptional coactivator, p52,<br />

functionally interacts with the essential splicing factor ASF/SF2.<br />

Molecular Cell 2:751.<br />

Ge, H. (2000) UPA, a universal protein array system for<br />

quantitative detection of protein-protein, protein-DNA, protein-<br />

RNA and protein-ligand interactions. Nucleic Acid Res. 28:e3.<br />

p75<br />

(Transcriptional Coactivator<br />

and Lens Epithelial Cell-<br />

Derived Growth Factor)<br />

human, Recombinant, E. coli<br />

Cat. No. Amount Price (€)<br />

PR-729 10 µg 400,--<br />

Liquid. Supplied in 20 mM Tris-HCl, pH 7.9, 100 mM<br />

KCl, 0.2 mM EDTA, 1 mM DTT, 20% glycerol.<br />

The human p75 protein, similar to p52, is a non-TAF<br />

transcription coactivator that mediates activatordependent<br />

transcription by RNA Polymerase II in vitro<br />

through most tested activators. Although p75 and p52<br />

are derived from alternatively splicing of a single gene<br />

and share most coding sequence, they reveal different<br />

function in several aspects. In addition to functioning<br />

as a transcription coactivator, p75 has been shown<br />

to be involved in growth of epithelial cells as a lens<br />

epithelial cell-derived growth factor (LEDGF), and in<br />

pathogenesis of atopic dermatitis as an autoantigen.<br />

Recombinant p75 protein (wild type, 530 amino<br />

acids) is isolated from an E. coli strain that carries<br />

the coding sequence of human p75 under the control<br />

of T7 promoter and purifi ed by an affi nity column in<br />

combination with FPLC chromatography.<br />

Recombinant p75 has been utilized for in vitro function<br />

studies, including transcription, splicing, protein-DNA/<br />

RNA and protein-protein interactions.<br />

Protein is greater than 95% homogeneous and<br />

contains no detectable protease, DNase, and RNase<br />

activity.<br />

Unit defi nition:<br />

1 unit equals 1 ng of purifi ed protein. 1 unit is suffi cient<br />

for a gel mobility shift assay in a 20 µl reaction;<br />

20 units are suffi cient for reconstituted transcription<br />

assay and 100 units are suffi cient for a protein-protein<br />

interaction assay.<br />

Purity: > 95% by SDS-PAGE.<br />

Store: -80 °C<br />

Selected references:<br />

Ge et al. (1998) Isolation of cDNAs encoding novel transcription<br />

coactivators p52 and p75 reveals an alternate regulatory<br />

mechanism of transcriptional activation. EMBO J. 17:6723.<br />

Ge et al. (1998) A novel transcriptional coactivator, p52,<br />

functionally interacts with the essential splicing factor ASF/SF2.<br />

Molecular Cell 2:751.<br />

Singh et al. (2000) Lens epithelium-derived growth factor<br />

(LEDGF/p75) and p52 are derived from a single gene by<br />

alternative splicing. Gene 242:265.<br />

Singh et al. (1999) Lens epithelium-derived growth factor:<br />

increased resistance to thermal and oxidative stresses. Invest<br />

Ophthalmol Vis. Sci. 40:1444.<br />

Ochs et al. (2000) Autoantibodies to DFS 70 kd/transcription<br />

coactivator p75 in atopic dermatitis and other conditions. J.<br />

Allergy Clin. Immunol. 105:1211.<br />

p75-CTR<br />

[C-terminal region of p75<br />

(LEDGF)]<br />

human, Recombinant, E. coli<br />

Cat. No. Amount Price (€)<br />

PR-758 10 µg 400,--<br />

Liquid. Supplied in 20 mM Tris-HCl, pH 7.9, 100 mM<br />

KCl, 0.2 mM EDTA, 1 mM DTT, 20% glycerol.<br />

Lens Epithelium-derived Growth Factor (LEDGF, also<br />

called as p75) has been shown to enhance survival of<br />

lens epithelial cells (LECs) against stress. LEDGF is a<br />

transcriptional activator. It protects the cells by binding<br />

to cis-stress response ((A/T)GGGG(T/A)), and heat<br />

shock (HSE; nGAAn) elements in the stress genes<br />

and activating their transcription. Originally, it was<br />

isolated as a co-activator required for transcriptional<br />

activation in human cell-free systems containing RNA<br />

Polymerase II and general initiation factors. LEDGF is<br />

expressed at all stages of development in a variety<br />

of organs and tissues. A second protein product,<br />

p52, can be produced from the same gene due to<br />

alternative splicing of pre-mRNA. In vitro, p52 was<br />

found to be more general and stronger transcriptional<br />

co-activator than LEDGF/p75. HIV-1 integrase (IN)<br />

forms a specifi c nuclear complex with p75 but not with<br />

p52, suggesting a role for p75’s C-terminal region in<br />

retroviral integration.<br />

Recombinant p75 CTR is isolated from an E. coli<br />

strain that carries the C-terminal coding sequence of<br />

the human LEDGF/p75 (amino acid 322-530) under<br />

the control of a T7 promoter.<br />

p75 has been applied in in vitro transcription assays,<br />

splicing assays, DNA and protein-protein interaction<br />

assays.<br />

The purifi ed recombinant protein is greater than 95%<br />

homogeneous and contains no detectable protease,<br />

DNase, and RNase activity.<br />

Unit defi nition:<br />

20 units (ng) are suffi cient for an in vitro transcription<br />

assay and 100 units are suffi cient for a protein-protein<br />

interaction assay.<br />

Purity: > 95% by SDS-PAGE.<br />

Store: -80 °C<br />

Selected references:<br />

Fatma et al. (2001) Transcriptional regulation of the antioxidant<br />

protein 2 gene, a thiol-specifi c antioxidant, by lens epitheliumderived<br />

growth factor to protect cells from oxidative stress. J.<br />

Biol. Chem. 276:48899.<br />

http://www.jenabioscience.com<br />

Singh et. al. (2001) LEDGF binds to heat shock and stressrelated<br />

element to activate the expression of stress-related<br />

genes. Biochem. Biophys. Res. Commun. 283:943.<br />

Ge et al. (1998) Isolation of cDNAs encoding novel transcription<br />

coactivators p52 and p75 reveals an alternate regulatory<br />

mechanism of transcriptional activation. EMBO J. 17:6723.<br />

Maertens et al. (2003) LEDGF/p75 is essential for nuclear and<br />

chromosomal targeting of HIV-1 integrase in human cells. J.<br />

Biol. Chem. 278:33528.<br />

p300<br />

(Tumor Suppressor Protein and<br />

Transcription Factor)<br />

human, Recombinant, Sf9<br />

insect cells<br />

Cat. No. Amount Price (€)<br />

PR-762 2 µg 450,--<br />

Liquid. Supplied in 20 mM Tris-HCl, pH 7.9, 100 mM<br />

KCl, 0.2 mM EDTA, 1 mM DTT, 20% glycerol.<br />

Human p300 and CBP (CREB Binding Protein)<br />

are highly related transcriptional coactivators.<br />

Both proteins have been identifi ed through protein<br />

interaction assays. In addition to interacting with<br />

variety of cellular factors and onco-proteins, loss of<br />

the wild type CBP alleles in isolated tumors suggests<br />

that CBP/p300 might serve as tumor suppressors.<br />

The ability of p300 to acetylate many transcription<br />

factors, including p53, E2F, TFIIE, and TFIIF etc.<br />

demonstrated a novel mechanism of targeted p300<br />

regulation of gene expression.<br />

The wild type p300 (2414 amino acid residues)<br />

was expressed in baculovirus system and purifi ed<br />

by an affi nity column in combination with FPLC<br />

chromatography.<br />

Recombinant p300 can be used 1) for protein-protein<br />

interaction assay; 2) for in vitro transcription assay; 3)<br />

for in vitro acetylation assay; and 4) for cell growth<br />

assay.<br />

Purifi ed protein is greater than 95% homogeneous<br />

and contains no detectable proteases, DNase, and<br />

RNase activity.<br />

Unit defi nition:<br />

1 unit equals 1 ng of purifi ed protein. 1 unit is suffi cient<br />

for a gel mobility shift assay in a 20 µl reaction;<br />

50 units are suffi cient for reconstituted transcription<br />

assay and 100 units are suffi cient for a protein-protein<br />

interaction assay.<br />

Purity: > 95% by SDS-PAGE.<br />

Store: -80 °C<br />

Selected references:<br />

Stein et al. (1990) Analysis of E1A-mediated growth regulation<br />

functions: binding of the 300-kilodalton cellular product<br />

correlates with E1A enhancer repression function and DNA<br />

synthesis-inducing activity. J. Virol. 64:4421.<br />

Eckner et al. (1994) Molecular cloning and functional analysis of<br />

the adenovirus E1A-associated 300-kD protein (p300) reveals<br />

a protein with properties of a transcriptional adaptor. Genes &<br />

Dev. 8:869.<br />

Kung et al. (2000) Gene dose-dependent control of<br />

hematopoiesis and hematologic tumor suppression by CBP.<br />

Genes & Dev. 14:272.<br />

Imhof et al. (1997) Acetylation of general transcription factors<br />

by histone acetyltransferases. Curr. Biol. 7:689.<br />

Gu et al. (1997) Activation of p53 sequence-specifi c DNA binding<br />

by acetylation of the p53 C-terminal domain. Cell 90:595.<br />

Martinez-Balbas et al. (2000) Regulation of E2F1 activity by<br />

acetylation. EMBO J. 19:662.<br />

p300 (C1135-2414)<br />

(p300 C-terminus, HAT Domain)<br />

human, Recombinant, Sf9<br />

insect cells<br />

Cat. No. Amount Price (€)<br />

PR-770 4 µg 450,--<br />

Liquid. Supplied in 20 mM Tris-HCl, pH 7.9, 100 mM<br />

KCl, 0.2 mM EDTA, 1 mM DTT, 20% glycerol.

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