Identification of a novel KRIT1 mutation in an Italian family with cerebral cavernous malformation by the protein truncation test.
Familial cerebral cavernous malformation (CCM) exhibits autosomal dominant inheritance and is characterized by vascular disorders of the brain, which can lead to seizures, focal neurological deficits, hemorrhagic stroke, and migraine. Three CCM loci have been mapped, but the gene for only one locus--KRIT1 coding for Krev-1/rap1 interaction trapped 1 (KRIT1) protein, which is responsible for more than 40% of familial cases--has been identified. To date, a total of 72 mutations have been described, with one founder effect in the Mexican/Hispanic community. We report the case of an Italian family with CCM that has a novel KRIT1 gene mutation leading to a truncated KRIT1 protein. The protein truncation test (PTT) has been used as a rapid method of identifying germline mutations in the KRIT1 gene.
Marini
Valeria
V
Department of Oncology, Biology and Genetics, University of Genova, Viale Benedetto XV, 6, Genoa 16132, Italy.
Ferrera
Loretta
L
Dorcaratto
Alessandra
A
Viale
Giuseppe
G
Origone
Paola
P
Mareni
Cristina
C
Garrè
Cecilia
C
D003545:Cysteine / Q000235:genetics; D004252:DNA Mutational Analysis / Q000379:methods; D008040:Genetic Linkage; D005998:Glycine / Q000235:genetics; D020786:Hemangioma, Cavernous, Central Nervous System / Q000209:etiology / Q000235:genetics*; D006801:Humans; D007558:Italy / Q000453:epidemiology; D000075927:KRIT1 Protein; D008869:Microtubule-Associated Proteins / Q000235:genetics*; D008875:Middle Aged; D008969:Molecular Sequence Data; D009154:Mutation; D010375:Pedigree; D016133:Polymerase Chain Reaction; D018807:Polymorphism, Single-Stranded Conformational; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D012333:RNA, Messenger / Q000096:biosynthesis
D000075927:KRIT1 Protein; C107928:KRIT1 protein, human; D008869:Microtubule-Associated Proteins; D011518:Proto-Oncogene Proteins; D012333:RNA, Messenger; D003545:Cysteine; D005998:Glycine