2023
Recognition and coacervation of G-quadruplexes by a multifunctional disordered region in RECQ4 helicase
PAPAGEORGIOU, Anna; Michaela POSPÍŠILOVÁ; Jakub CIBULKA; Raghib ASHRAF; Christopher WAUDBY et al.Základní údaje
Originální název
Recognition and coacervation of G-quadruplexes by a multifunctional disordered region in RECQ4 helicase
Autoři
PAPAGEORGIOU, Anna; Michaela POSPÍŠILOVÁ; Jakub CIBULKA; Raghib ASHRAF; Christopher WAUDBY; Pavel KADEŘÁVEK ORCID; Volha MAROZ; Karel KUBÍČEK ORCID; Zbyněk PROKOP; Lumír KREJČÍ a Konstantinos TRIPSIANES
Vydání
Nature Communications, Berlin, Nature, 2023, 2041-1723
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10300 1.3 Physical sciences
Stát vydavatele
Německo
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 14.700
Označené pro přenos do RIV
Ano
Kód RIV
RIV/00216224:14740/23:00134740
Organizační jednotka
Středoevropský technologický institut
UT WoS
EID Scopus
Klíčová slova anglicky
Biomolecular polyelectrolyte complexes; DNA helicase Q4; G-quadruplexes; intrinsically disordered regions; RPA protein
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 27. 10. 2024 15:27, Ing. Martina Blahová
Anotace
V originále
Biomolecular polyelectrolyte complexes can be formed between oppositely charged intrinsically disordered regions (IDRs) of proteins or between IDRs and nucleic acids. Highly charged IDRs are abundant in the nucleus, yet few have been functionally characterized. Here, we show that a positively charged IDR within the human ATP-dependent DNA helicase Q4 (RECQ4) forms coacervates with G-quadruplexes (G4s). We describe a three-step model of charge-driven coacervation by integrating equilibrium and kinetic binding data in a global numerical model. The oppositely charged IDR and G4 molecules form a complex in the solution that follows a rapid nucleation-growth mechanism leading to a dynamic equilibrium between dilute and condensed phases. We also discover a physical interaction with Replication Protein A (RPA) and demonstrate that the IDR can switch between the two extremes of the structural continuum of complexes. The structural, kinetic, and thermodynamic profile of its interactions revealed a dynamic disordered complex with nucleic acids and a static ordered complex with RPA protein. The two mutually exclusive binding modes suggest a regulatory role for the IDR in RECQ4 function by enabling molecular handoffs. Our study extends the functional repertoire of IDRs and demonstrates a role of polyelectrolyte complexes involved in G4 binding.
Návaznosti
| EF17_043/0009632, projekt VaV |
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| EF18_070/0009846, projekt VaV |
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| GA23-06913S, projekt VaV |
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| GX21-22593X, projekt VaV |
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| MUNI/A/1393/2022, interní kód MU |
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| MUNI/G/1594/2019, interní kód MU |
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| 206292/E/17/Z, interní kód MU |
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| 857560, interní kód MU (Kód CEP: EF17_043/0009632) |
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| 90242, velká výzkumná infrastruktura |
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