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CUE domain found in NEDD4-binding protein 2 (N4BP2) and similar proteins N4BP2 has been identified as an oncogene bcl-3 coding protein BCL-3-binding protein (B3BP) that participates in connecting transcriptional activation and genetic recombination of the Ig gene. In addition to BCL-3, it also interacts with p300/CBP histone acetyltransferases. N4BP2 shows intrinsic ATP binding and hydrolyzing activity. It contains an N-terminal ATP-binding region that is responsible for the interaction with BCL-3 and p300/CBP. N4BP2 also functions as a 5'-polynucleotide kinase that can transfer a phosphate group to the 5' end of DNA and RNA substrates. Moreover, N4BP2 contains a C-terminal MutS-related domain that possesses nicking endonuclease activity and may play a role in DNA mismatch repair (MMR). This model corresponds to CUE domain in the N-terminus of N4BP2. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",