Enzyme characteristics of recombinant poly(ADP-ribose) polymerases-1 of rat and human origin mirror the correlation between cellular poly(ADP-ribosyl)ation capacity and species-specific life span.
Mech Ageing Dev
; 131(5): 366-9, 2010 May.
Article
em En
| MEDLINE
| ID: mdl-20399804
ABSTRACT
Poly(ADP-ribosyl)ation is a posttranslational modification, which is involved in many cellular functions, including DNA repair and maintenance of genomic stability, and has also been implicated in cellular and organismal ageing. We have previously reported that maximum poly(ADP-ribosyl)ation capacity in mononuclear blood cells is correlated with mammalian life span. Here we show that the difference between a long-lived and a short-lived species tested (i.e. man and rat) is directly mirrored by the enzymatic parameters of recombinant poly(ADP-ribose) polymerase-1 (PARP-1), i.e. substrate affinity and reaction velocity. In addition, we have characterized two human PARP-1 alleles and assign their activity difference to their respective initial velocity and not substrate affinity.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Processamento de Proteína Pós-Traducional
/
Poli(ADP-Ribose) Polimerases
/
Longevidade
Idioma:
En
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Alemanha