ZCCHC8, the nuclear exosome targeting component, is mutated in familial pulmonary fibrosis and is required for telomerase RNA maturation

© 2019 Gable et al.; Published by Cold Spring Harbor Laboratory Press..

Short telomere syndromes manifest as familial idiopathic pulmonary fibrosis; they are the most common premature aging disorders. We used genome-wide linkage to identify heterozygous loss of function of ZCCHC8, a zinc-knuckle containing protein, as a cause of autosomal dominant pulmonary fibrosis. ZCCHC8 associated with TR and was required for telomerase function. In ZCCHC8 knockout cells and in mutation carriers, genomically extended telomerase RNA (TR) accumulated at the expense of mature TR, consistent with a role for ZCCHC8 in mediating TR 3' end targeting to the nuclear RNA exosome. We generated Zcchc8-null mice and found that heterozygotes, similar to human mutation carriers, had TR insufficiency but an otherwise preserved transcriptome. In contrast, Zcchc8-/- mice developed progressive and fatal neurodevelopmental pathology with features of a ciliopathy. The Zcchc8-/- brain transcriptome was highly dysregulated, showing accumulation and 3' end misprocessing of other low-abundance RNAs, including those encoding cilia components as well as the intronless replication-dependent histones. Our data identify a novel cause of human short telomere syndromes-familial pulmonary fibrosis and uncover nuclear exosome targeting as an essential 3' end maturation mechanism that vertebrate TR shares with replication-dependent histones.

Medienart:

E-Artikel

Erscheinungsjahr:

2019

Erschienen:

2019

Enthalten in:

Zur Gesamtaufnahme - volume:33

Enthalten in:

Genes & development - 33(2019), 19-20 vom: 01. Okt., Seite 1381-1396

Sprache:

Englisch

Beteiligte Personen:

Gable, Dustin L [VerfasserIn]
Gaysinskaya, Valeriya [VerfasserIn]
Atik, Christine C [VerfasserIn]
Talbot, C Conover [VerfasserIn]
Kang, Byunghak [VerfasserIn]
Stanley, Susan E [VerfasserIn]
Pugh, Elizabeth W [VerfasserIn]
Amat-Codina, Nuria [VerfasserIn]
Schenk, Kara M [VerfasserIn]
Arcasoy, Murat O [VerfasserIn]
Brayton, Cory [VerfasserIn]
Florea, Liliana [VerfasserIn]
Armanios, Mary [VerfasserIn]

Links:

Volltext

Themen:

63231-63-0
Carrier Proteins
Ciliopathy
EC 2.7.7.49
Journal Article
Lung disease
Nuclear Proteins
Nuclear RNA exosome
RNA
RNA processing
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Telomerase
Telomerase RNA
ZCCHC8 protein, human

Anmerkungen:

Date Completed 19.11.2019

Date Revised 15.11.2022

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1101/gad.326785.119

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM300975899