SAP domain forms a flexible part of DNA aperture in Ku70/80

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A90127%2F21%3A00139995" target="_blank" >RIV/00216224:90127/21:00139995 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388971:_____/21:00542410

Výsledek na webu

<a href="https://febs.onlinelibrary.wiley.com/doi/10.1111/febs.15732" target="_blank" >https://febs.onlinelibrary.wiley.com/doi/10.1111/febs.15732</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/febs.15732" target="_blank" >10.1111/febs.15732</a>

Jazyk výsledku

angličtina

Název v původním jazyce

SAP domain forms a flexible part of DNA aperture in Ku70/80

Popis výsledku v původním jazyce

Nonhomologous end joining (NHEJ) is a DNA repair mechanism that religates double-strand DNA breaks to maintain genomic integrity during the entire cell cycle. The Ku70/80 complex recognizes DNA breaks and serves as an essential hub for recruitment of NHEJ components. Here, we describe intramolecular interactions of the Ku70 C-terminal domain, known as the SAP domain. Using single-particle cryo-electron microscopy, mass spectrometric analysis of intermolecular cross-linking and molecular modelling simulations, we captured variable positions of the SAP domain depending on DNA binding. The first position was localized at the DNA aperture in the Ku70/80 apo form but was not observed in the DNA-bound state. The second position, which was observed in both apo and DNA-bound states, was found below the DNA aperture, close to the helical arm of Ku70. The localization of the SAP domain in the DNA aperture suggests a function as a flexible entry gate for broken DNA. Databases EM maps have been deposited in EMDB (EMD-11933). Coordinates have been deposited in Protein Data Bank (PDB ). Other data are available from corresponding authors upon a request.

Název v anglickém jazyce

SAP domain forms a flexible part of DNA aperture in Ku70/80

Popis výsledku anglicky

Nonhomologous end joining (NHEJ) is a DNA repair mechanism that religates double-strand DNA breaks to maintain genomic integrity during the entire cell cycle. The Ku70/80 complex recognizes DNA breaks and serves as an essential hub for recruitment of NHEJ components. Here, we describe intramolecular interactions of the Ku70 C-terminal domain, known as the SAP domain. Using single-particle cryo-electron microscopy, mass spectrometric analysis of intermolecular cross-linking and molecular modelling simulations, we captured variable positions of the SAP domain depending on DNA binding. The first position was localized at the DNA aperture in the Ku70/80 apo form but was not observed in the DNA-bound state. The second position, which was observed in both apo and DNA-bound states, was found below the DNA aperture, close to the helical arm of Ku70. The localization of the SAP domain in the DNA aperture suggests a function as a flexible entry gate for broken DNA. Databases EM maps have been deposited in EMDB (EMD-11933). Coordinates have been deposited in Protein Data Bank (PDB ). Other data are available from corresponding authors upon a request.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10608 - Biochemistry and molecular biology

Projekt

—

Návaznosti

—

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

FEBS JOURNAL

ISSN

1742-464X

e-ISSN

—

Svazek periodika

288

Číslo periodika v rámci svazku

14

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

4382-4393

Kód UT WoS článku

000618236000001

EID výsledku v databázi Scopus

2-s2.0-85101481378