RING finger, H2 subclass, found in RING finger protein 25 (RNF25) and similar proteins
RNF25, also known as AO7, is a putative E3 ubiquitin-protein ligase that was initially identified as an interacting protein of the E2 ubiquitin-conjugating enzyme, Ubc5B. It is ubiquitously expressed in various tissues and predominantly localized in the nucleus. RNF25 activates the nuclear factor (NF)-kappaB-dependent gene expression upon stimulation with Interleukin-1 beta (IL-1beta), or tumor necrosis factor (TNF), or overexpression of NF-kappaB-inducing kinase. It interacts with the p65 transactivation domain (TAD) and modulates its transcriptional activity. RNF25 contains an N-terminal RWD domain, a C3H2C3-type RING-H2 finger, and a C-terminal Pro-rich region. Both the RING-H2 finger and the C-terminal regions of RNF25 are necessary for transcriptional activation.
Comment:C3H2C3-type RING-H2 finger consensus motif: C-X2-C-X(9-39)-C-X(1-3)-H-X(2-3)-H-X2-C-X(4-48)-C-X2-C, where X is any amino acid and the number of X residues varies in different fingers
Comment:A RING finger typically binds two zinc atoms, with its Cys and/or His side chains in a unique "cross-brace" arrangement.
Jiyao W et al.(2023). "The conserved domain database in 2023.",