The structure of CARD11 involves multiple domains that impact the protein's ability to activate BCL10 and NF-κB activity. CARD11 has a CARD domain, a serine-threonine rich region, is associated with the N-terminus, which is essential for NF-κB signaling activity. The region following the CARD domain is highly coiled. In deleting the CARD domain, all NF-κB signaling activity was prevented. The CARD domain on CARD11 interacts with the CARD domain on BCL10 to initiate the signaling pathway.
On the C-terminus of CARD11 there is the MAGUK domain that is associated with the cell membrane. This domain is often referred to as the inhibitory domain. Protein kinase C activates CARD11 by phosphorylating serine residues within the inhibitory domain.
Bertin J, Wang L, Guo Y, Jacobson MD, Poyet JL, Srinivasula SM, Merriam S, DiStefano PS, Alnemri ES (Apr 2001). "CARD11 and CARD14 are novel caspase recruitment domain (CARD)/membrane-associated guanylate kinase (MAGUK) family members that interact with BCL10 and activate NF-kappa B". J. Biol. Chem. 276 (15): 11877–82. doi:10.1074/jbc.M010512200. PMID 11278692. S2CID 35815019. https://doi.org/10.1074%2Fjbc.M010512200
Gaide O, Martinon F, Micheau O, Bonnet D, Thome M, Tschopp J (May 2001). "Carma1, a CARD-containing binding partner of Bcl10, induces Bcl10 phosphorylation and NF-kappaB activation". FEBS Lett. 496 (2–3): 121–7. doi:10.1016/S0014-5793(01)02414-0. PMID 11356195. S2CID 22024213. https://doi.org/10.1016%2FS0014-5793%2801%2902414-0
"Entrez Gene: CARD11 caspase recruitment domain family, member 11". https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=84433
Bertin J, Wang L, Guo Y, Jacobson MD, Poyet JL, Srinivasula SM, Merriam S, DiStefano PS, Alnemri ES (Apr 2001). "CARD11 and CARD14 are novel caspase recruitment domain (CARD)/membrane-associated guanylate kinase (MAGUK) family members that interact with BCL10 and activate NF-kappa B". J. Biol. Chem. 276 (15): 11877–82. doi:10.1074/jbc.M010512200. PMID 11278692. S2CID 35815019. https://doi.org/10.1074%2Fjbc.M010512200
"Entrez Gene: CARD11 caspase recruitment domain family, member 11". https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=84433
Bertin J, Wang L, Guo Y, Jacobson MD, Poyet JL, Srinivasula SM, Merriam S, DiStefano PS, Alnemri ES (Apr 2001). "CARD11 and CARD14 are novel caspase recruitment domain (CARD)/membrane-associated guanylate kinase (MAGUK) family members that interact with BCL10 and activate NF-kappa B". J. Biol. Chem. 276 (15): 11877–82. doi:10.1074/jbc.M010512200. PMID 11278692. S2CID 35815019. https://doi.org/10.1074%2Fjbc.M010512200
Bertin J, Wang L, Guo Y, Jacobson MD, Poyet JL, Srinivasula SM, Merriam S, DiStefano PS, Alnemri ES (Apr 2001). "CARD11 and CARD14 are novel caspase recruitment domain (CARD)/membrane-associated guanylate kinase (MAGUK) family members that interact with BCL10 and activate NF-kappa B". J. Biol. Chem. 276 (15): 11877–82. doi:10.1074/jbc.M010512200. PMID 11278692. S2CID 35815019. https://doi.org/10.1074%2Fjbc.M010512200
Holliday MJ, Witt A, Rodriguez Gama A, Walters B, Arthur C, Halfman R, Rohou A, Dueber E, Fairbrother W (2019). "Structures of autoinhibited and polymerized forms of CARD9 reveal mechanisms of CARD9 and CARD11 activation". Nat Commun. 10 (3070): 3070. Bibcode:2019NatCo..10.3070H. doi:10.1038/s41467-019-10953-z. PMC 6624267. PMID 31296852. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6624267
Bertin J, Wang L, Guo Y, Jacobson MD, Poyet JL, Srinivasula SM, Merriam S, DiStefano PS, Alnemri ES (April 2001). "CARD11 and CARD14 are novel caspase recruitment domain (CARD)/membrane-associated guanylate kinase (MAGUK) family members that interact with BCL10 and activate NF-kappa B". J. Biol. Chem. 276 (15): 11877–82. doi:10.1074/jbc.M010512200. PMID 11278692. S2CID 35815019. https://doi.org/10.1074%2Fjbc.M010512200
Holliday MJ, Witt A, Rodriguez Gama A, Walters B, Arthur C, Halfman R, Rohou A, Dueber E, Fairbrother W (2019). "Structures of autoinhibited and polymerized forms of CARD9 reveal mechanisms of CARD9 and CARD11 activation". Nat Commun. 10 (3070): 3070. Bibcode:2019NatCo..10.3070H. doi:10.1038/s41467-019-10953-z. PMC 6624267. PMID 31296852. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6624267