A Single-Target Mitochondrial RNA Editing Factor of Funaria hygrometrica Can Fully Reconstitute RNA Editing at Two Sites in Physcomitrella patens.
Plant Cell Physiol
; 58(3): 496-507, 2017 03 01.
Article
em En
| MEDLINE
| ID: mdl-28394399
ABSTRACT
Nuclear-encoded pentatricopeptide repeat (PPR) proteins are key factors for site-specific RNA editing, converting cytidines into uridines in plant mitochondria and chloroplasts. All editing factors in the model moss Physcomitrella patens have a C-terminal DYW domain with similarity to cytidine deaminase. However, numerous editing factors in flowering plants lack such a terminal DYW domain, questioning its immediate role in the pyrimidine base conversion process. Here we further investigate the Physcomitrella DYW-type PPR protein PPR_78, responsible for mitochondrial editing sites cox1eU755SL and rps14eU137SL. Complementation assays with truncated proteins demonstrate that the DYW domain is essential for full PPR_78 editing functionality. The DYW domain can be replaced, however, with its counterpart from another editing factor, PPR_79. The PPR_78 ortholog of the related moss Funaria hygrometrica fully complements the Physcomitrella mutant for editing at both sites, although the editing site in rps14 is lacking in Funaria. Editing factor orthologs in different taxa may thus retain editing capacity for multiple sites despite the absence of editing requirement.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
RNA
/
Edição de RNA
/
Bryopsida
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Plant Cell Physiol
Assunto da revista:
BOTANICA
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Alemanha