APAF1 IHC Antibody


Ready To Use


Catalog Number Size Price Availability
IW-PA1249 9 ml $258 Yes


Apoptotic peptidase activating factor 1, also known as APAF1, is a protein which in humans is encoded by the APAF1 gene. This gene is mapped to chromosome 12q23. It encodes a cytoplasmic protein that initiates apoptosis. And it is an essential downstream effector of p53-mediated apoptosis. This protein contains several copies of the WD40 repeat domain, a caspase recruitment domain (CARD), and an ATPase domain (NB-ARC). In the presence of cytochrome c and dATP, APAF1 assembles into an oligomeric apoptosome, which is responsible for activation of procaspase-9 and maintenance of the enzymatic activity of processed caspase-9. Furthermore, APAF1 is inactivated in metastatic melanomas, leading to defects in the execution of apoptotic cell death. Additionally, APAF1 has been shown to interact with NLRP1,5 Caspase-9, APIP, BCL2-like 1, and HSPA4.


Catalog Number





9 ml











Rabbit IgG




A synthetic peptide corresponding to a sequence at the N-terminal of human APAF1, identical to the related rat and mouse sequence.



Immunogen affinity purified.






Species Reactivity


Human, mouse, rat. Not tested in other species.

Positive Control


Rat brain


Cellular Localization






Ready to use solution. No further dilution needed. Serum blocking step should be omitted.




Store at 2-8 °C. Do not freeze.




IHC-P: Heat induced epitope retrieval (HIER) is required on formalin fixed paraffin embedded sections.

IHC-Fr: Not tested.

ICC: Not tested.




This product is intended for Research Use Only. Interpretation of the test results is solely the responsibility of the user.




Users should follow general laboratory precautions when handling this product. Wear personal protective equipment to avoid contact with skin and eyes.




1. Kim, H.; Jung, Y. K.; Kwon, Y. K.; Park, S. H. : Assignment of apoptotic protease activating factor-1 gene (APAF1) to human chromosome band 12q23 by fluorescence in situ hybridization. Cytogenet. Cell Genet. 87: 252-253, 1999.

2. Robles, A. I.; Bemmels, N. A.; Foraker, A. B.; Harris, C. C. : APAF-1 is a transcriptional target of p53 in DNA damage-induced apoptosis. Cancer Res. 61: 6660-6664, 2001.

3. Bao, Q.; Lu, W.; Rabinowitz, J. D.; Shi, Y. : Calcium blocks formation of apoptosome by preventing nucleotide exchange in Apaf-1. Molec. Cell 25: 181-192, 2007.

4. Soengas, M. S.; Capodieci, P.; Polsky, D.; Mora, J.; Esteller, M.; Opitz-Araya, X.; McCombie, R.; Herman, J. G.; Gerald, W. L.; Lazebnik, Y. A.; Cordon-Cardo, C.; Lowe, S. W. : Inactivation of the apoptosis effector Apaf-1 in malignant melanoma. Nature 409: 207-211, 2001.

5. Chu, Z L; Pio F, Xie Z, Welsh K, Krajewska M, Krajewski S, Godzik A, Reed J C (Mar. 2001). "A novel enhancer of the Apaf1 apoptosome involved in cytochrome c-dependent caspase activation and apoptosis". J. Biol. Chem. (United States) 276 (12): 9239-45.

6. Cho, Dong-Hyung; Hong Yeon-Mi, Lee Ho-June, Woo Ha-Na, Pyo Jong-Ok, Mak Tak W, Jung Yong-Keun (Sep. 2004). "Induced inhibition of ischemic/hypoxic injury by APIP, a novel Apaf-1-interacting protein". J. Biol. Chem. (United States) 279 (38): 39942-50.

7. Li, P; Nijhawan D, Budihardjo I, Srinivasula S M, Ahmad M, Alnemri E S, Wang X (Nov. 1997). "Cytochrome c and dATP-dependent formation of Apaf-1/caspase-9 complex initiates an apoptotic protease cascade". Cell (UNITED STATES) 91 (4): 479-89.

8. Hu, Y; Benedict M A, Wu D, Inohara N, Núñez G (Apr. 1998). "Bcl-XL interacts with Apaf-1 and inhibits Apaf-1-dependent caspase-9 activation". Proc. Natl. Acad. Sci. U.S.A. (UNITED STATES) 95 (8): 4386-91.

9. Pan, G; O'Rourke K, Dixit V M (Mar. 1998). "Caspase-9, Bcl-XL, and Apaf-1 form a ternary complex". J. Biol. Chem. (UNITED STATES) 273 (10): 5841-5.

10. Saleh, A; Srinivasula S M, Balkir L, Robbins P D, Alnemri E S (Aug. 2000). "Negative regulation of the Apaf-1 apoptosome by Hsp70". Nat. Cell Biol. (ENGLAND) 2 (8): 476-83.




Immunohistochemical staining of formalin fixed paraffin-embedded rat brain section using APAF1 antibody



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