A mutation abolishing the ZMPSTE24 cleavage site in prelamin A causes a progeroid disorder.
J Cell Sci
; 129(10): 1975-80, 2016 05 15.
Article
in En
| MEDLINE
| ID: mdl-27034136
ABSTRACT
In 1994 in the Journal of Cell Science, Hennekes and Nigg reported that changing valine to arginine at the endoproteolytic cleavage site in chicken prelamin A abolishes its conversion to lamin A. The consequences of this mutation in an organism have remained unknown. We now report that the corresponding mutation in a human subject leads to accumulation of prelamin A and causes a progeroid disorder. Next generation sequencing of the subject and her parents' exomes identified a de novo mutation in the lamin A/C gene (LMNA) that resulted in a leucine to arginine amino acid substitution at residue 647 in prelamin A. The subject's fibroblasts accumulated prelamin A, a farnesylated protein, which led to an increased percentage of cultured cells with morphologically abnormal nuclei. Treatment with a protein farnesyltransferase inhibitor improved abnormal nuclear morphology. This case demonstrates that accumulation of prelamin A, independent of the loss of function of ZMPSTE24 metallopeptidase that catalyzes processing of prelamin A, can cause a progeroid disorder and that a cell biology assay could be used in precision medicine to identify a potential therapy.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Progeria
/
Metalloendopeptidases
/
Lamin Type A
/
Membrane Proteins
Type of study:
Etiology_studies
/
Prognostic_studies
Limits:
Adolescent
/
Female
/
Humans
Language:
En
Journal:
J Cell Sci
Year:
2016
Document type:
Article
Affiliation country:
United States
Publication country:
ENGLAND
/
ESCOCIA
/
GB
/
GREAT BRITAIN
/
INGLATERRA
/
REINO UNIDO
/
SCOTLAND
/
UK
/
UNITED KINGDOM