Anti-proAKAP4 (clone 6F12) - 20 µg

The anti-proAKAP4 clone 6F12 recognizes the precursor of A-kinase anchor protein 4 also called proAKAP4 (110 kDa). 

This monoclonal antibody is suitable for Western Blot, Immunofluorescence, Flow cytometry and Immunohistochemistry applications.

This monoclonal antibody (clone 6F12) only recognizes the proAKAP4 also called the precursor of AKAP4 (110 kDa / 854 AA), the prodomain (21 kDa) and does not react with the AKAP4 issued from conversion (82 kDa / 665 AA). 

This antibody reacts also with AKAP4 proteins from horse, bull, mouse, rat and ram semens.

Research Use Only Product (RUO) / Not for Diagnosis or Therapeutic Use.

Background on AKAP4 protein

AKAP4 (A-Kinase Anchor Protein 4) protein belongs to the family of A-kinase anchor proteins (AKAPs) all sharing a common function of binding to the regulatory subunit of protein kinase A (PKA) and confining the PKA holoenzyme to discrete locations within the cell.

The human AKAP4 gene is located on chromosome X and encodes a 854 amino acid polypeptide localized in the fibrous sheath of the sperm flagellum, AKAP4 plays a major role in sperm motility. AKAP4 is also named AKAP-4, AKAP82 (A-Kinase Anchor Protein 82 KDa), PRKA4 (Protein Kinase A Anchoring Protein 4), HI, CT99 (Cancer/Testis Antigen 99), FSC1 (Fibrous sheath component 1) or P82.

The monoclonal antibody (clone 6F12) only recognizes the pro-form of AKAP4. It does not react with the cleaved forms AKAP4.

Western blotting and immunocytochemistry techniques using the monoclonal anti-pro AKAP4 antibody clone 6F12 showed that the pro-AKAP4 is specifically expressed in human, equine, porcine, bovine murine and ovine spermatozoa.

Mouse monoclonal antibody clone 6F12 is suitable for Western Blot, Immunofluorescence, ELISA and Immunohistochemistry (see applications).

Main References

Carracedo S, Briand-Amirat L, Dordas-Perpinyà M, Ramos Escuredo Y, Delcombel R, Sergeant N and Delehedde M (2022) ProAKAP4 protein marker: towards a functional approach to male fertility. Animal Reproduction Science. Vol.247(107074):1-20.https://doi.org/10.1016/j.anireprosci.2022.107074

Blommaert D, Sergeant N, Delehedde M, Jouy N, Mitchell V, Franck T, Donnay I, Lejeune JP and Serteyn D (2019b) Expression, localization, and concentration of A-kinase anchor protein 4 (AKAP4) and its precursor (proAKAP4) in equine semen: promising marker correlated to the total and progressive motility in thawed spermatozoa. Theriogenology. Vol. 131:52-60.

Carracedo S, Loyens A, Eddarkaoui S, Serteyn D, Malo C, Skidmore L, Briand-Amirat L, Barbotin AL, Maurage CA, Delehedde M and Sergeant N (2020) The sperm specific proAKAP4 polypeptide exhibited conserved functions, localizations and metabolism among mammals. Animal Reproduction Science. Vol. 220 :106448

Delehedde M, Carracedo S, Duchene B, Demouveaux B, Remy G, Kervoaze G, Aubry S, Gevaert MH, Maurage CA, Jonckheere N, Van Seuningen I, Philippe Gosset G, Desseyn JL, Sergeant N and Pichavant M (2020) Cigarette smoking affects the sperm-specific proAKAP4 concentrations and impairs both spermatogenesis and sperm quality. Andrology. Vol. 8 (Suppl. 1):45-46.

Delehedde M, Carracedo S, Selleslagh M, Eddarkaoui S, Amirat-Briand L and Sergeant N (2019) ProAKAP4 polypeptide as a biomarker of sperm functionality and male fertility disorders. Int J Gynecol and Reprod Sci. Vol. 2(1):13-19.

Delehedde M, Demouveaux B, Remy G, Selleslagh M, Dewulf Q, Desseyn JL, Moreau M, Gosset P, Muriel Pichavant M and Sergeant N (2019a) ProAKAP4 concentrations as an indicator of good spermatogenesis and sperm quality under oxidative stress conditions. Andrology. Vol. 7(1):86.

Griffin R, Swegen A, Baker M, John Aitken R, A Skerrett-Byrne D, Silva Rodriguez A, E Martín-Cano F, Nixon B, J Peña F, Delehedde M, Sergeant N and Gibb Z (2020) Mass spectrometry reveals distinct proteomic profiles in high- and low-quality stallion spermatozoa. Reproduction. 160(5):695-707.

Langlade C, Buff S, Dias C, Commin L (2020) Assessment of Optimized Frozen/Thawed Semen Samples in Canines with the New A-Kinase Anchor Protein 4 Precursor Biomarker. Biopreserv Biobank. 18(5):409-414.

Blommaert D, Franck T, Lejeune JF, Selleslagh M, Jouy N, Sergeant N, Serteyn D and Delehedde M (2019b) The Horse 4MID® Kit as a promising tool to compare different freezing media to preserve stallion semen. Rev. Bras. Reprod. Anim. Vol 43(2):585.

Riesco M, Anel-Lopez L, Neila-Montero M, Palacin-Martinez C, Montes-Garrido R, Alvarez M, de Paz P, Anel L (2020) ProAKAP4 as Novel Molecular Marker of Sperm Quality in Ram: An Integrative Study in Fresh, Cooled and Cryopreserved Sperm. Biomolecules. 10(7):1046. doi: 10.3390/biom10071046.

Ruelle I, Sergeant N, Bencharif D, Charreaux F, Thorin C, Michaud S, Dordas-Perpinyà M, Jouy N, Audry S, Maurage CA, Delehedde M and Briand-Amirat L (2020) ProAKAP4 concentrations in semen as a predictive tool of bull fertility: A preliminary study. Reproduction, Fertility and Development. 32(1):145.

Sergeant N, Blommaert D, Carracedo S, Franck T, Lejeune JP, Gevaert MH, Aubry S, Maurage CA, Serteyn D and Delehedde M (2020) Assessment of the proAKAP4 concentrations as a pertinent sperm parameter to select extenders and preservatives of stallion semen. Animal Reproduction Science. Vol. 220 :106449. 

 Sergeant N, Carracedo S, Blommaert D, Aubry S, Jouy N, Lejeune JP, Franck T, Maurage CA, Serteyn D, Buée L and Delehedde M (2020) Proteolysis of proAKAP4 in semen as a regulatory sensor of sperm quality and functionality. Andrology. Vol. 8 (Suppl. 1):44-45.

Delehedde M, Carracedo S, Selleslagh M, Eddarkaoui S, Amirat-Briand L and Sergeant N (2019) ProAKAP4 polypeptide as a biomarker of sperm functionality and male fertility disorders. Int J Gynecol and Reprod Sci. Vol. 2(1):13-19.