Date published: 2026-7-9

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SPAG5 CRISPR Activation Plasmid (h): sc-403607-ACT

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Datasheets
  • Target species: human
  • 20 µg of transfection-ready, purified plasmid DNA; Suitable for up to 20 transfections
  • SPAG5 CRISPR Activation Plasmid (h) is a synergistic activation mediator (SAM) transcription activation system designed to specifically upregulate gene expression
  • SPAG5 CRISPR Activation Plasmid (h) consists of three plasmids at a 1:1:1 mass ratio: a plasmid encoding the deactivated Cas9 (dCas9) nuclease (D10A and N863A) fused to the transactivation domain VP64, and a blasticidin resistance gene; a plasmid encoding the MS2-p65-HSF1 fusion protein, and a hygromycin resistance gene; a plasmid encoding a target-specific 20 nt guide RNA fused to two MS2 RNA aptamers, and a puromycin resistance gene
  • The resulting SAM complex binds to a site-specific region approximately 200-250 nt upstream of the transcriptional start site and provides robust recruitment of transcription factors for highly efficient gene activation
  • gRNAs encoded by SPAG5 CRISPR Activation Plasmid (h) and SPAG5 CRISPR Activation Plasmid (h2) target distinct regulatory regions upstream of the SPAG5 transcriptional start site. One or both designs may be available
  • Following transfection, gene knockout efficiency can be assayed by WB, IF or IHC using antibody: SPAG5 Antibody (LX-8): sc-100885
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    Ordering Information

    Product NameCatalog #UNITPriceQtyFAVORITES

    SPAG5 CRISPR Activation Plasmid (h)

    sc-403607-ACT
    20 µg
    $397.00

    SPAG5 (sperm-associated antigen 5), also known as astrin, encodes a microtubule-associated protein that localizes to the mitotic spindle and kinetochores, where it supports chromosome alignment, spindle integrity, and faithful sister chromatid segregation. SPAG5 participates in core mitotic control processes including kinetochore–microtubule attachment dynamics and spindle checkpoint regulation, linking it to cell-cycle progression and proliferative capacity. Dysregulated SPAG5 expression is frequently examined in cancer biology contexts where mitotic stress, chromosomal instability, and altered proliferation are prominent features. As a result, SPAG5 is widely used as a research target in studies of mitosis, genome stability, and pathways governing cell division.

    SPAG5 CRISPR Activation Plasmid (h) provides a targeted, non-destructive approach to upregulating endogenous SPAG5 expression without altering the underlying DNA sequence.

    SPAG5 CRISPR Activation Plasmid (h) is a three-plasmid synergistic activation mediator (SAM) system engineered for highly efficient, site-specific transcriptional upregulation of the SPAG5 locus in human cell lines. The system is built around a catalytically inactive Cas9 (dCas9) carrying two inactivating mutations (D10A and N863A) that eliminate nuclease activity while preserving DNA binding. This dCas9 is fused to VP64, a potent transcriptional activator, and is co-expressed with a blasticidin resistance gene for selection. The second plasmid encodes the MS2-p65-HSF1 fusion protein, a secondary activator complex that works in concert with dCas9-VP64, alongside a hygromycin resistance gene. The third plasmid encodes a target-specific 20 nt sgRNA fused to two MS2 RNA aptamers that recruit the MS2-p65-HSF1 complex to the activation site, accompanied by a puromycin resistance gene. The three plasmids are delivered at a 1:1:1 mass ratio for balanced expression of all system components.

    Once assembled at the target locus, the SAM complex binds within approximately 200 bp upstream of the SPAG5 transcriptional start site, where VP64, p65, and HSF1 act in concert to recruit transcriptional machinery and drive upregulation of endogenous SPAG5 expression. Unlike nuclease-active Cas9, dCas9 does not introduce double-strand breaks or modify the genomic sequence, preserving the native SPAG5 locus and enabling the study of SPAG5-dependent transcriptional responses at the endogenous locus, making it a valuable tool for functional studies, target gene identification, and the modeling of SPAG5 pathway restoration in tumor cells with silenced or reduced SPAG5 expression.

    For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.