Hibernation factors directly block ribonucleases from entering the ribosome in response to starvation: [+ erratum]
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Hibernation factors directly block ribonucleases from entering the ribosome in response to starvation : [+ erratum]. / Prossliner, Thomas; Gerdes, Kenn; Sørensen, Michael Askvad; Winther, Kristoffer Skovbo.
I: Nucleic Acids Research, Bind 49, Nr. 4, 2021, s. 2226-2239.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Hibernation factors directly block ribonucleases from entering the ribosome in response to starvation
T2 - [+ erratum]
AU - Prossliner, Thomas
AU - Gerdes, Kenn
AU - Sørensen, Michael Askvad
AU - Winther, Kristoffer Skovbo
N1 - Corrigendum to article ‘Hibernation factors directly block ribonucleases from entering the ribosome in response to starvation’ DOI: 10.1093/nar/gkab170
PY - 2021
Y1 - 2021
N2 - Ribosome hibernation is a universal translation stress response found in bacteria as well as plant plastids. The term was coined almost two decades ago and despite recent insights including detailed cryo-EM structures, the physiological role and underlying molecular mechanism of ribosome hibernation has remained unclear. Here, we demonstrate that Escherichia coli hibernation factors RMF, HPF and RaiA (HFs) concurrently confer ribosome hibernation. In response to carbon starvation and resulting growth arrest, we observe that HFs protect ribosomes at the initial stage of starvation. Consistently, a deletion mutant lacking all three factors (ΔHF) is severely inhibited in regrowth from starvation. ΔHF cells increasingly accumulate 70S ribosomes harbouring fragmented rRNA, while rRNA in wild-type 100S dimers is intact. RNA fragmentation is observed to specifically occur at HF-associated sites in 16S rRNA of assembled 70S ribosomes. Surprisingly, degradation of the 16S rRNA 3'-end is decreased in cells lacking conserved endoribonuclease YbeY and exoribonuclease RNase R suggesting that HFs directly block these ribonucleases from accessing target sites in the ribosome.
AB - Ribosome hibernation is a universal translation stress response found in bacteria as well as plant plastids. The term was coined almost two decades ago and despite recent insights including detailed cryo-EM structures, the physiological role and underlying molecular mechanism of ribosome hibernation has remained unclear. Here, we demonstrate that Escherichia coli hibernation factors RMF, HPF and RaiA (HFs) concurrently confer ribosome hibernation. In response to carbon starvation and resulting growth arrest, we observe that HFs protect ribosomes at the initial stage of starvation. Consistently, a deletion mutant lacking all three factors (ΔHF) is severely inhibited in regrowth from starvation. ΔHF cells increasingly accumulate 70S ribosomes harbouring fragmented rRNA, while rRNA in wild-type 100S dimers is intact. RNA fragmentation is observed to specifically occur at HF-associated sites in 16S rRNA of assembled 70S ribosomes. Surprisingly, degradation of the 16S rRNA 3'-end is decreased in cells lacking conserved endoribonuclease YbeY and exoribonuclease RNase R suggesting that HFs directly block these ribonucleases from accessing target sites in the ribosome.
UR - https://doi.org/10.1093/nar/gkab170
U2 - 10.1093/nar/gkab017
DO - 10.1093/nar/gkab017
M3 - Journal article
C2 - 33503254
AN - SCOPUS:85102396431
VL - 49
SP - 2226
EP - 2239
JO - Nucleic Acids Research
JF - Nucleic Acids Research
SN - 0305-1048
IS - 4
ER -
ID: 260743179