Key features and details
- Rabbit polyclonal to PIWIL1
- Suitable for: WB, IHC-P, ICC/IF, IP
- Reacts with: Mouse, Rat, Human
- Isotype: IgG
Product nameAnti-PIWIL1 antibody
See all PIWIL1 primary antibodies
DescriptionRabbit polyclonal to PIWIL1
Tested applicationsSuitable for: WB, IHC-P, ICC/IF, IPmore details
Species reactivityReacts with: Mouse, Rat, Human
Synthetic peptide corresponding to Human PIWIL1 aa 800-900 (C terminal).
(Peptide available as
- Miwi is exclusively expressed in spermatocytes and hematopoietic stem cells. WB: Mouse and rat testis tissue lysates. ICC/IF: methanol fixed HeLa cells.
Storage instructionsShipped at 4°C. Store at +4°C short term (1-2 weeks). Upon delivery aliquot. Store at -20°C or -80°C. Avoid freeze / thaw cycle.
Storage bufferpH: 7.40
Preservative: 0.02% Sodium azide
Batches of this product that have a concentration < 1mg/ml may have BSA added as a stabilising agent. If you would like information about the formulation of a specific lot, please contact our scientific support team who will be happy to help.
Concentration information loading...
PurityImmunogen affinity purified
Immunizing Peptide (Blocking)
Our Abpromise guarantee covers the use of ab12337 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
|WB||Use a concentration of 1 µg/ml. Detects a band of approximately 99 kDa (predicted molecular weight: 99 kDa).Can be blocked with Human PIWIL1 peptide (ab13827).
ab12337 detects a 99 kDa band in both mouse and rat testis lysates (positive controls). Non-specific bands at 102 kDa were also observed in mouse and rat liver lysates (negative controls).
|IHC-P||Use at an assay dependent concentration. Perform heat mediated antigen retrieval with citrate buffer pH 6 before commencing with IHC staining protocol.|
|ICC/IF||Use a concentration of 10 µg/ml.|
|IP||Use at an assay dependent concentration. PubMed: 19918066|
FunctionPlays a central role during spermatogenesis by repressing transposable elements and prevent their mobilization, which is essential for the germline integrity. Acts via the piRNA metabolic process, which mediates the repression of transposable elements during meiosis by forming complexes composed of piRNAs and Piwi proteins and govern the methylation and subsequent repression of transposons. Directly binds methylated piRNAs, a class of 24 to 30 nucleotide RNAs that are generated by a Dicer-independent mechanism and are primarily derived from transposons and other repeated sequence elements. Besides their function in transposable elements repression, piRNAs are probably involved in other processes during meiosis such as translation regulation. Probable component of some RISC complex, which mediates RNA cleavage and translational silencing. Also plays a role in the formation of chromatoid bodies and is required for some miRNAs stability (By similarity). Isoform 3 may be a negative developmental regulator.
Tissue specificityDetected in most fetal and adult tissues. Expressed in testes, specifically in germline cells; detected in spermatocytes and spermatids during spermatogenesis. Increased expression in testicular tumors originating from embryonic germ cells with retention of germ cells phenotype. No expression in testicular tumors of somatic origin, such as Sertoli cell and Leydig cell tumors. Overexpressed in gastric cancer cells. Isoform 3 is ubiquitously expressed, and specifically in CD34+ hematopoietic progenitor cells but not in more differentiated cells.
Sequence similaritiesBelongs to the argonaute family. Piwi subfamily.
Contains 1 PAZ domain.
Contains 1 Piwi domain.
DomainThe PAZ domain specifically recognizes binds the 2'-O-methylated 3'-end of piRNAs.
modificationsArginine methylation by PRMT5 is required for the interaction with Tudor domain-containing protein (TDRD1, TDRKH/TDRD2, RNF17/TDRD4, TDRD6, TDRD7 and TDRD9) and subsequent localization to the meiotic nuage, also named P granule.
Cellular localizationCytoplasm. Component of the meiotic nuage, also named P granule, a germ-cell-specific organelle required to repress transposon during meiosis. Also present in chromatoid body.
- Information by UniProt
- HIWI antibody
- MIWI antibody
- Piwi (Drosophila) like 1 antibody
All lanes : Anti-PIWIL1 antibody (ab12337) at 1 µg/ml
Lane 1 : Testis (Mouse) Tissue Lysate
Lane 2 : Liver (Mouse) Tissue Lysate
Lane 3 : Testis (Rat) Tissue Lysate - normal tissue (ab29388)
Lane 4 : Liver (Rat) Tissue Lysate
Lysates/proteins at 10 µg per lane.
All lanes : Goat polyclonal to Rabbit IgG - H&L - Pre-Adsorbed (HRP) at 1/3000 dilution
Performed under reducing conditions.
Predicted band size: 99 kDa
Observed band size: 99 kDa
Additional bands at: 102 kDa (possible non-specific binding)
ab12337 gave a positive signal in both mouse and rat testis lysates (positive controls). Bands were also observed in mouse and rat liver lysates (negative controls) that were higher in size to that observed in testis.
Image courtesy of Human Protein Atlas
ab12337 staining PIWI Human female colon, showing a distinct and strong staining pattern at glandular cells. Paraffin embedded human colon tissue was incubated with ab12337 (1/200 dilution) for 30 mins at room temperature. Antigen retrieval was performed by heat induction in citrate buffer pH 6..
ab12337 was tested in a tissue microarray (TMA) containing a wide range of normal and cancer tissues as well as a cell microarray consisting of a range of commonly used, well characterised human cell lines. Further results for this antibody can be found at www.proteinatlas.org
ICC/IF image of ab12337 stained HeLa cells. The cells were 100% methanol fixed (5 min) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody ab12337 at 1µg/ml overnight at +4°C. The secondary antibody (green) was DyLight® 488 goat anti- rabbit (ab96899) IgG (H+L) used at a 1/250 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red) at a 1/200 dilution for 1h. DAPI was used to stain the cell nuclei (blue) at a concentration of 1.43µM.
ab12337 has been referenced in 29 publications.
- Zhu Z et al. Rapamycin-mediated mTOR inhibition impairs silencing of sex chromosomes and the pachytene piRNA pathway in the mouse testis. Aging (Albany NY) 11:185-208 (2019). PubMed: 30636722
- Fragkos M et al. Dicer prevents genome instability in response to replication stress. Oncotarget 10:4407-4423 (2019). PubMed: 31320994
- Sellitto A et al. Molecular and Functional Characterization of the Somatic PIWIL1/piRNA Pathway in Colorectal Cancer Cells. Cells 8:N/A (2019). PubMed: 31694219
- Li W et al. The Prognosis Value of PIWIL1 and PIWIL2 Expression in Pancreatic Cancer. J Clin Med 8:N/A (2019). PubMed: 31443431
- Wang C et al. Heat shock protein DNAJA1 stabilizes PIWI proteins to support regeneration and homeostasis of planarian Schmidtea mediterranea. J Biol Chem 294:9873-9887 (2019). PubMed: 31076507