7AFS

The structure of Artemis variant D37A

7AFS の概要

• エントリーDOI: 10.2210/pdb7afs/pdb
• 関連するPDBエントリー: 6TT5
• 分子名称: Protein artemis, NICKEL (II) ION, ZINC ION, ... (5 entities in total)
• 機能のキーワード: artemis, snm1c, dclre1c, nuclease, hydrolase
• 由来する生物種: Homo sapiens (Human)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 42039.37

構造登録者

Yosaatmadja, Y.,Goubin, S.,Newman, J.A.,Mukhopadhyay, S.M.M.,Dannerfjord, A.A.,Burgess-Brown, N.A.,von Delft, F.,Arrowsmith, C.H.,Bountra, C.,Gileadi, O. (登録日: 2020-09-20, 公開日: 2020-10-28, 最終更新日: 2024-01-31)

主引用文献

Yosaatmadja, Y.,Baddock, H.T.,Newman, J.A.,Bielinski, M.,Gavard, A.E.,Mukhopadhyay, S.M.M.,Dannerfjord, A.A.,Schofield, C.J.,McHugh, P.J.,Gileadi, O.
Structural and mechanistic insights into the Artemis endonuclease and strategies for its inhibition.
Nucleic Acids Res., 49:9310-9326, 2021

PubMed Abstract: Artemis (SNM1C/DCLRE1C) is an endonuclease that plays a key role in development of B- and T-lymphocytes and in dsDNA break repair by non-homologous end-joining (NHEJ). Artemis is phosphorylated by DNA-PKcs and acts to open DNA hairpin intermediates generated during V(D)J and class-switch recombination. Artemis deficiency leads to congenital radiosensitive severe acquired immune deficiency (RS-SCID). Artemis belongs to a superfamily of nucleases containing metallo-β-lactamase (MBL) and β-CASP (CPSF-Artemis-SNM1-Pso2) domains. We present crystal structures of the catalytic domain of wildtype and variant forms of Artemis, including one causing RS-SCID Omenn syndrome. The catalytic domain of the Artemis has similar endonuclease activity to the phosphorylated full-length protein. Our structures help explain the predominantly endonucleolytic activity of Artemis, which contrasts with the predominantly exonuclease activity of the closely related SNM1A and SNM1B MBL fold nucleases. The structures reveal a second metal binding site in its β-CASP domain unique to Artemis, which is amenable to inhibition by compounds including ebselen. By combining our structural data with that from a recently reported Artemis structure, we were able model the interaction of Artemis with DNA substrates. The structures, including one of Artemis with the cephalosporin ceftriaxone, will help enable the rational development of selective SNM1 nuclease inhibitors.

PubMed: 34387696
DOI: 10.1093/nar/gkab693

実験手法

X-RAY DIFFRACTION (1.7 Å)