Recombinant Human Pc4 And Sfrs1-Interacting Protein (PSIP1) Protein (His-SUMO)

Name: Recombinant Human Pc4 And Sfrs1-Interacting Protein (PSIP1) Protein (His-SUMO)
Brand: Beta LifeScience
SKU: BLC-03081P
Availability: InStock

Greater than 90% as determined by SDS-PAGE.

Based on the SEQUEST from database of E.coli host and target protein, the LC-MS/MS Analysis result of this product could indicate that this peptide derived from E.coli-expressed Homo sapiens (Human) PSIP1.

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Product Overview

Description	Recombinant Human Pc4 And Sfrs1-Interacting Protein (PSIP1) Protein (His-SUMO) is produced by our E.coli expression system. This is a full length protein.
Purity	Greater than 90% as determined by SDS-PAGE.
Uniprotkb	O75475
Target Symbol	PSIP1
Synonyms	CLL associated antigen KW 7; CLL-associated antigen KW-7; Dense fine speckles 70 kDa protein; DFS 70; DFS70; LEDGF; Lens epithelium derived growth factor; Lens epithelium-derived growth factor; MGC74712; p52; p75; PAIP; PC4 and SFRS1 interacting protein 1; PC4 and SFRS1 interacting protein 2; PC4 and SFRS1 interacting protein; PC4 and SFRS1-interacting protein; PSIP 1; PSIP 2; Psip1; PSIP1_HUMAN; PSIP2; Transcriptional coactivator p75/p52
Species	Homo sapiens (Human)
Expression System	E.coli
Tag	N-6His-SUMO
Target Protein Sequence	MTRDFKPGDLIFAKMKGYPHWPARVDEVPDGAVKPPTNKLPIFFFGTHETAFLGPKDIFPYSENKEKYGKPNKRKGFNEGLWEIDNNPKVKFSSQQAATKQSNASSDVEVEEKETSVSKEDTDHEEKASNEDVTKAVDITTPKAARRGRKRKAEKQVETEEAGVVTTATASVNLKVSPKRGRPAATEVKIPKPRGRPKMVKQPCPSESDIITEEDKSKKKGQEEKQPKKQPKKDEEGQKEEDKPRKEPDKKEGKKEVESKRKNLAKTGVTSTSDSEEEGDDQEGEKKRKGGRNFQTAHRRNMLKGQHEKEAADRKRKQEEQMETEQQNKDEGKKPEVKKVEKKRETSMDSRLQRIHAEIKNSLKIDNLDVNRCIEALDELASLQVTMQQAQKHTEMITTLKKIRRFKVSQVIMEKSTMLYNKFKNMFLVGEGDSVITQVLNKSLAEQRQHEEANKTKDQGKKGPNKKLEKEQTGSKTLNGGSDAQDGNQPQHNGESNEDSKDNHEASTKKKPSSEERETEISLKDSTLDN
Expression Range	1-530aa
Protein Length	Full Length
Mol. Weight	76.1kDa
Research Area	Immunology
Form	Liquid or Lyophilized powder
Buffer	Liquid form: default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. Lyophilized powder form: the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
Reconstitution	Briefly centrifuged the vial prior to opening to bring the contents to the bottom. Reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL. It is recommended to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. The default final concentration of glycerol is 50%.
Storage	1. Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. 2. Avoid repeated freeze-thaw cycles. 3. Store working aliquots at 4°C for up to one week. 4. In general, protein in liquid form is stable for up to 6 months at -20°C/-80°C. Protein in lyophilized powder form is stable for up to 12 months at -20°C/-80°C.
Notes	Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

Target Details

Target Function	Transcriptional coactivator involved in neuroepithelial stem cell differentiation and neurogenesis. Involved in particular in lens epithelial cell gene regulation and stress responses. May play an important role in lens epithelial to fiber cell terminal differentiation. May play a protective role during stress-induced apoptosis. Isoform 2 is a more general and stronger transcriptional coactivator. Isoform 2 may also act as an adapter to coordinate pre-mRNA splicing. Cellular cofactor for lentiviral integration.
Subcellular Location	Nucleus. Note=Remains chromatin-associated throughout the cell cycle.
Protein Families	HDGF family
Database References	HGNC: 9527 OMIM: 603620 KEGG: hsa:11168 STRING: 9606.ENSP00000370109 UniGene: PMID: 29997176 findings suggest a novel role of LEDGF/p75 in protecting the unintegrated 3' processed linear HIV-1 cDNA from exonucleolytic degradation. PMID: 28914817 mono-specific anti-DFS70 antibodies are a strong discriminator between ANA positive healthy controls and patients with systemic autoimmune rheumatic diseases. PMID: 28770702 Authors report here that the endogenous levels of LEDGF/p75 are upregulated in metastatic castration resistant prostate cancer (mCRPC) cells selected for resistance to the taxane drug docetaxel (DTX). PMID: 28212536 An important role of PSIP1 in triple negative breast cancer tumorigenicity by promoting the expression of genes that control the cell cycle and tumor metastasis PMID: 28633434 We identify the Myc-interacting protein JPO2 and its partner binding protein LEDGF/p75 as critical modulators of PI3K/AKT signaling and metastasis in medulloblastoma PMID: 27013196 The association of LEDGF proteins with the FACT complex and give further support to a role of SSRP1 in HIV-1 infection. PMID: 27216501 short isoform (p52) of a transcriptional co-activator-PC4 and SF2 interacting protein (Psip1), which is known to be involved in linking transcription to RNA processing, specifically regulates the expression of the lncRNA Hottip-located at the 5' end of the Hoxa locus PMID: 28384324 Germline polymorphisms in an enhancer of PSIP1 are associated with epithelial ovarian cancer. PMID: 26840454 PSIP1 likely plays an important role in Hereditary Hearing Loss. PMID: 26689366 LEDGF/p75 Overexpression Attenuates Oxidative Stress-Induced Necrosis and Upregulates the Oxidoreductase ERP57/PDIA3/GRP58 in Prostate Cancer PMID: 26771192 common LEDGF/p75 interaction interface shared by JPO2, PogZ, MLL1, IWS1 and HIV IN PMID: 26245978 Results show that these antibodies are highly specific for dense fine speckles 70 protein DFS70/LEDGFp75 and do not target methyl CpG binding protein 2 (MeCP2). PMID: 26235378 LEDGF/p75 interacts with splicing factors, contributes to exon choice, and directs HIV-1 integration to transcription units that are highly spliced. PMID: 26545813 Together, these results provide evidence for an Integrase/Pol mediated uptake of LEDGF/p75 in HIV-1 viral particles and a specific cleavage by HIV protease. PMID: 25809198 Altogether, these results indicate that a complex containing LEDGF/p75, Iws1, and Spt6 participates in regulating postintegration steps of HIV latency. PMID: 25590759 LEDGF and 44 other novel putative nuclear targets of human thioredoxin 1 have been identified. PMID: 25231459 Results of the present work reinforce the association of PSIP1 gene and rs61744944 single nucleotide polymorphism with HIV-1 infection long-term nonprogressors status. PMID: 25047784 Data show that the same site on integrase-binding domain (IBD) of lens epithelium-derived growth factor (LEDGF) is involved in binding to MLL protein and HIV-IN (integrase), indicating an approach to target LEDGF in both leukemia and HIV infection. PMID: 25305204 Authors identified an additional LEDGF/p75-MLL interface, which overlaps with the binding site of known LEDGF/p75 interactors-HIV-1 integrase, PogZ, and JPO2. PMID: 25082813 a regulation of LEDGF interaction with chromatin by cellular partners of its PWWP domain could be involved in several processes linked to LEDGF tethering properties, such as lentiviral integration, DNA repair or transcriptional regulation PMID: 24312278 LEDGF is crucial for the growth and survival of HPV-positive cancer cells PMID: 24604027 Data indicate that JPO2 and LEDGF/p75 interact directly and specifically in vivo through the specific interaction domain of JPO2 and the C-terminal domain of LEDGF/p75. PMID: 24634210 conclude that FBXO10, a candidate breast cancer susceptibility associated gene, is induced by cellular stress and LEDGF may play a role in expression of this gene PMID: 23138933 Data indicate that the stabilized peptides inhibit the interaction of HIV-1 integrase (IN) with the cellular cofactor LEDGF/p75. PMID: 23758584 LEDGF organizes and stabilizes an active integrase tetramer suitable for specific viral DNA integration. PMID: 23593299 Although identified in a cohort of long-term nonprogressors, our study did not indicate that the I436S or T473I mutation in LEDGF/p75 affects the interaction with HIV-1 integrase. PMID: 23211777 Collectively, results reveal the involvement of LEDGF-mediated elevated expression of Hsp27-dependent survival pathway(s) in prostate cancer PMID: 22647853 The observed variation in LEDGF/p75 expression was not correlated with the disease progression. PMID: 23226247 A role for the human immunodeficiency virus type 1 capsid CA protein in determining the dependency of HIV-1 on LEDGF/p75 during infection highlights a connection between the viral capsid and chromosomal DNA integration. PMID: 23097450 Cotransfection studies with Sp1 in Drosophila cells that were Sp1-deficient, showed increased LEDGF/p75 transcription. PMID: 22615874 reduced LEDGF/p75 levels may play a role in resistance to HIV-1 infection. PMID: 22479480 findings provide insights into the regulation and regulatory functions of LEDGF in Sumoylation-dependent transcriptional control that may be essential for modifying the physiology of cells to maintain cellular homeostasis PMID: 22748127 Depletion of LEDGF impairs the recruitment of C-terminal binding protein interacting protein (CtIP) to DNA DSBs and the subsequent CtIP-dependent DNA-end resection. PMID: 22773103 We propose that Psip1/p52, through its binding to both chromatin and splicing factors, might act to modulate splicing PMID: 22615581 The LEDGF/p75-MeCP2 interaction differentially influences Hsp27pr activation depending on the cellular and molecular context. PMID: 22275515 findings suggest that genetic variation in LEDGF may influence susceptibility to HIV-1 infection and disease progression, which provides in-vivo evidence that LEDGF/p75 is an important host cofactor for HIV-1 replication PMID: 22317832 Results further establish LEDGF/p75 as a cancer-related protein, and provide a rationale for ongoing studies aimed at understanding the clinical significance of its expression in specific human cancers. PMID: 22276150 The fusion genes combining NUP98 exon 11/12 with PSIP1 exon 8 may be implicated in the pathogenesis of myelodysplastic syndrome (MDS). PMID: 22103895 P23H rhodopsin as well as WT rhodopsin form aggregates in RPE cells and LEDGF(1-326) decreases these aggregates. Further, LEDGF(1-326) reduces the RPE cell damage caused by P23H rhodopsin. PMID: 21915354 Computational, biochemical, and genetic approaches enabled us to identify the transcription factor Sp1 as a key modulator of the PSIP1 promoter, controlling LEDGF/p75 transcription through two binding sites PMID: 22019592 LEDGF/DFS70 activates the MK2/IL6/STAT3 pathway in HaCaT keratinocytes. PMID: 21676593 We conclude that serum IgE-anti-DFS70 autoantibodies (aAbs) and IgG(4)-anti-DFS70 aAbs may be related to the severity of atopic dermatitis. PMID: 21329475 Association of polymorphisms in the LEDGF/p75 gene (PSIP1) with susceptibility to HIV-1 infection and disease progression may affect patients outcomes. PMID: 21681054 We confirm that p75 is useful in differentiating atypical fibroxanthoma from spindle cell melanoma. PMID: 21623867 The memory subset of CD4+ T cells showed significantly higher expression levels of APOBEC3G, TRIM5alpha, and LEDGF/p75. PMID: 21784078 The effect of HIV-1 integrase on the chromatin binding of LEDGF/p75 requires the direct interaction of these two proteins. PMID: 21510906 LEDGF dominant interference and depletion impair HIV-1 integration at distinct postentry stages. PMID: 21270171 ectopic expression of LEDGF/DFS70 in keratinocytes could be involved in the pathology of psoriasis vulgaris PMID: 20631726 It appears that the lack of integration observed in HIV-1 infected LEDGF/p75-knockdown cells is due mainly to the inhibitory effect of Rev following the formation of a Rev-integrase complex. PMID: 20678206

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

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