Parental expression of the chromodomain protein Pdd1p is required for completion of programmed DNA elimination and nuclear differentiation.
Mol Cell
; 4(5): 865-72, 1999 Nov.
Article
en En
| MEDLINE
| ID: mdl-10619033
ABSTRACT
Thousands of DNA elimination events occur during somatic differentiation of many ciliated protozoa. In Tetrahymena, the eliminated DNA aggregates into submacronuclear structures containing the protein Pdd1p, a member of the chromodomain family. We disrupted somatic copies of PDD1, eliminating parental expression of the gene early in the sexual phase of the life cycle. Even though zygotic expression, from the undisrupted germline PDD1 copy, is activated before DNA elimination normally occurs, the somatic knockout cells suffer defects in DNA elimination, genome endoduplication, and nuclear resorption, and eventually die, demonstrating that PDD1 is essential and suggesting Pdd1p is directly involved in establishing a chromatin structure required for DNA elimination.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Fosfoproteínas
/
Tetrahymena
/
Proteínas Nucleares
/
Expresión Génica
/
Núcleo Celular
/
ADN Protozoario
Límite:
Animals
Idioma:
En
Revista:
Mol Cell
Asunto de la revista:
BIOLOGIA MOLECULAR
Año:
1999
Tipo del documento:
Article
País de afiliación:
Estados Unidos