MOTOR PROTEIN / macrodomain / autoinhibition / DNA damage / PARP1
機能・相同性
機能・相同性情報
poly-ADP-D-ribose modification-dependent protein binding / ATP-dependent chromatin remodeler activity / histone reader activity / site of DNA damage / nucleosome binding / DNA helicase activity / Dual Incision in GG-NER / Formation of Incision Complex in GG-NER / 加水分解酵素; 酸無水物に作用; 酸無水物に作用・細胞または細胞小器官の運動に関与 / site of double-strand break ...poly-ADP-D-ribose modification-dependent protein binding / ATP-dependent chromatin remodeler activity / histone reader activity / site of DNA damage / nucleosome binding / DNA helicase activity / Dual Incision in GG-NER / Formation of Incision Complex in GG-NER / 加水分解酵素; 酸無水物に作用; 酸無水物に作用・細胞または細胞小器官の運動に関与 / site of double-strand break / chromatin remodeling / DNA repair / nucleotide binding / DNA damage response / ATP hydrolysis activity / nucleoplasm / ATP binding / nucleus 類似検索 - 分子機能
ジャーナル: Nat Commun / 年: 2021 タイトル: Structural basis of ALC1/CHD1L autoinhibition and the mechanism of activation by the nucleosome. 著者: Li Wang / Kangjing Chen / Zhucheng Chen / 要旨: Chromatin remodeler ALC1 (amplification in liver cancer 1) is crucial for repairing damaged DNA. It is autoinhibited and activated by nucleosomal epitopes. However, the mechanisms by which ALC1 is ...Chromatin remodeler ALC1 (amplification in liver cancer 1) is crucial for repairing damaged DNA. It is autoinhibited and activated by nucleosomal epitopes. However, the mechanisms by which ALC1 is regulated remain unclear. Here we report the crystal structure of human ALC1 and the cryoEM structure bound to the nucleosome. The structure shows the macro domain of ALC1 binds to lobe 2 of the ATPase motor, sequestering two elements for nucleosome recognition, explaining the autoinhibition mechanism of the enzyme. The H4 tail competes with the macro domain for lobe 2-binding, explaining the requirement for this nucleosomal epitope for ALC1 activation. A dual-arginine-anchor motif of ALC1 recognizes the acidic pocket of the nucleosome, which is critical for chromatin remodeling in vitro. Together, our findings illustrate the structures of ALC1 and shed light on its regulation mechanisms, paving the way for the discovery of drugs targeting ALC1 for the treatment of cancer.