SP3 Polyclonal antibody

SP3 Polyclonal Antibody for WB, IHC, ELISA

Host / Isotype

Rabbit / IgG


human, mouse





Cat no : 26584-1-AP


SP3, Sp3 transcription factor, SPR 2, Transcription factor Sp3

Tested Applications

Positive WB detected inPC-3 cells, C2C12 cell, COLO 320 cells
Positive IHC detected inmouse lung tissue
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0

Recommended dilution

Western Blot (WB)WB : 1:500-1:1000
Immunohistochemistry (IHC)IHC : 1:1000-1:4000
It is recommended that this reagent should be titrated in each testing system to obtain optimal results.
Sample-dependent, Check data in validation data gallery.

Product Information

26584-1-AP targets SP3 in WB, IHC, ELISA applications and shows reactivity with human, mouse samples.

Tested Reactivity human, mouse
Cited Reactivityhuman, mouse
Host / Isotype Rabbit / IgG
Class Polyclonal
Type Antibody
Immunogen SP3 fusion protein Ag25082
Full Name Sp3 transcription factor
Calculated Molecular Weight 781 aa, 82 kDa
Observed Molecular Weight 70 kDa, 115 kDa
GenBank Accession NumberBC126414
Gene Symbol SP3
Gene ID (NCBI) 6670
Conjugate Unconjugated
Form Liquid
Purification MethodAntigen affinity purification
Storage Buffer PBS with 0.02% sodium azide and 50% glycerol pH 7.3.
Storage ConditionsStore at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage. 20ul sizes contain 0.1% BSA.

Background Information

SP3, also named as transcription factor Sp3, is a 781 amino acid protein, which contains 3 C2H2-type zinc fingers and belongs to the Sp1 C2H2-type zinc-finger protein family. SP3 localizes to the nuclear periphery and in nuclear dots when sumoylated. Some localization in PML nuclear bodies. SP3 is acetylated by histone acetyltransferase p300, deacetylated by HDACs and sumoylated on all isoforms. Sumoylated on 2 sites in longer isoforms with Lys-551 being the major site. Sumoylation at this site promotes nuclear localization to the nuclear periphery, nuclear dots and PML nuclear bodies. Sumoylation on Lys-551 represses the transactivation activity, except for the largest isoform, L-Sp3, which has little effect on transactivation. Alternate sumoylation and acetylation at Lys-551 also control transcriptional activity. There exits tow modified isoform and molecular weight of those are 70 kda and 115 kda.


Product Specific Protocols
WB protocol for SP3 antibody 26584-1-APDownload protocol
IHC protocol for SP3 antibody 26584-1-APDownload protocol
Standard Protocols
Click here to view our Standard Protocols



Dig Dis Sci

Speckle-Type POZ Protein Down-Regulates Matrix Metalloproteinase 2 Expression via Sp1/PI3K/Akt Signaling Pathway in Colorectal Cancer.

Authors - Shouhua Zhang

Biochem Biophys Res Commun

Transcriptional activation of CSTB gene expression by transcription factor Sp3

Authors - Weiyi Zhu

Mol Cell Probes

LINC00115 regulates lung adenocarcinoma progression via sponging miR-154-3p to modulate Sp3 expression

Authors - Kexin Sun

Cell Rep

LHPP-mediated inorganic pyrophosphate hydrolysis-driven lysosomal acidification in astrocytes regulates adult neurogenesis

Authors - Longze Sha

Int Immunopharmacol

Menstrual blood-derived stem cells exosomal miR-let-7 to ameliorate pulmonary fibrosis through inhibiting ferroptosis by Sp3/HDAC2/Nrf2 signaling pathway

Authors - Lifang Sun


The reviews below have been submitted by verified Proteintech customers who received an incentive forproviding their feedback.


Anh (Verified Customer) (07-15-2021)

clear bands, have some unspecific bands

  • Applications: Western Blot
  • Primary Antibody Dilution: 1:500
  • Cell Tissue Type: mouse heart
SP3 Antibody Western Blot validation (1:500 dilution) in mouse heart (Cat no:26584-1-AP)