2022
Structural basis of microRNA biogenesis by Dicer-1 and its partner protein Loqs-PB
JOURAVLEVA, Karina, Dmitrij GOLOVENKO, Gabriel DEMO, Robert C DUTCHER, Traci M Tanaka HALL et. al.Základní údaje
Originální název
Structural basis of microRNA biogenesis by Dicer-1 and its partner protein Loqs-PB
Autoři
JOURAVLEVA, Karina, Dmitrij GOLOVENKO, Gabriel DEMO (703 Slovensko, garant, domácí), Robert C DUTCHER, Traci M Tanaka HALL, Phillip D ZAMORE a Andrei A KOROSTELEV
Vydání
Molecular Cell, CAMBRIDGE, CELL PRESS, 2022, 1097-2765
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10608 Biochemistry and molecular biology
Stát vydavatele
Velká Británie a Severní Irsko
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 16.000
Kód RIV
RIV/00216224:14740/22:00128512
Organizační jednotka
Středoevropský technologický institut
UT WoS
000898565300010
Klíčová slova anglicky
COLI RIBONUCLEASE-IIIRNA-BINDINGCRYSTAL-STRUCTUREDOMAIN REVEALSTRBP COMPLEXRECOGNITIONMIRNASINTERFERENCEPREDICTIONMECHANISM
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 2. 2. 2023 20:23, Mgr. Pavla Foltynová, Ph.D.
Anotace
V originále
In animals and plants, Dicer enzymes collaborate with double-stranded RNA-binding domain (dsRBD) pro-teins to convert precursor-microRNAs (pre-miRNAs) into miRNA duplexes. We report six cryo-EM structures of Drosophila Dicer-1 that show how Dicer-1 and its partner Loqs-PB cooperate (1) before binding pre-miRNA, (2) after binding and in a catalytically competent state, (3) after nicking one arm of the pre-miRNA, and (4) following complete dicing and initial product release. Our reconstructions suggest that pre-miRNA binds a rare, open conformation of the Dicer-1???Loqs-PB heterodimer. The Dicer-1 dsRBD and three Loqs-PB dsRBDs form a tight belt around the pre-miRNA, distorting the RNA helix to place the scissile phosphodiester bonds in the RNase III active sites. Pre-miRNA cleavage shifts the dsRBDs and partially closes Dicer-1, which may promote product release. Our data suggest a model for how the Dicer-1???Loqs-PB complex affects a complete cycle of pre-miRNA recognition, stepwise endonuclease cleavage, and product release. Keywords
Návaznosti
LL2008, projekt VaV |
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