SNM1A , artemis/SNM1C, yeast Pso2p, and related proteins; MBL-fold metallo-hydrolase domain
Includes human SNM1A (SNM1 homolog A, also known as DNA cross-link repair 1A protein) and Saccharomyces cerevisiae Pso2 protein (PSOralen derivative sensitive 2, also known as SNM1, sensitive to nitrogen mustard 1), both proteins are 5'-exonucleases and function in interstrand cross-links (ICL) repair. Also includes the nuclease artemis (also known as SNM1C, SNM1 homolog C, SNM1-like protein, and DNA cross-link repair 1C protein) which plays a role in V(D)J recombination/DNA repair. Purified artemis protein possesses single-strand-specific 5' to 3' exonuclease activity. Upon complex formation with, and phosphorylation by, DNA-dependent protein kinase, artemis gains endonucleolytic activity on hairpins and 5' and 3' overhangs. Members of this subgroup belong to the MBL-fold metallo-hydrolase superfamily which is comprised mainly of hydrolytic enzymes which carry out a variety of biological functions.
Jiyao W et al.(2023). "The conserved domain database in 2023.",