Mutational analysis of NF2 by in vitro expression assay
Neurofibromatosis 2 (NF2) is an autosomal dominant disorder characterized by the development of multiple nervous system tumors. The recently cloned NF2 tumor suppressor gene encodes a novel member of a family of cytoskeleton associated proteins. Because the majority of germline mutational events of the NF2 gene cause gross truncation of the protein product, we investigated the feasibility of a single step protein-based screen for mutation. Total cellular RNA extracted from blood or cell lines was used to synthesize cDNA from mRNA using reverse transcriptase. Two rounds of PCR amplification were carried out. The 5{prime} primer contained an in-frame T7 promoter followed by an initiation methionine within a Kozak consensus sequence. The antisense 3{prime} primer contained the native stop codon followed by a poly (A) tail. The resulting product was used in a cell-free coupled transcription/translation reaction which was visualized on a standard protein separating gel. We were able to amplify 95% of the coding sequence of the NF2 gene with a single set of primers which produced a 1724 basepair product. Normal transcripts produced an approximately 66 KDa protein product while transcripts which contained known nonsense or splice site mutations produced truncated protein products in addition to the normal sized product. Estimation of the location of the mutation could be determined by the extent of the protein shift. This system may improve both efficiency and sensitivity of mutational analysis of the NF2 gene.
- OSTI ID:
- 134294
- Report Number(s):
- CONF-941009-; ISSN 0002-9297; TRN: 95:005313-1027
- Journal Information:
- American Journal of Human Genetics, Vol. 55, Issue Suppl.3; Conference: 44. annual meeting of the American Society of Human Genetics, Montreal (Canada), 18-22 Oct 1994; Other Information: PBD: Sep 1994
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BASIC STUDIES
BIOASSAY
EFFICIENCY
SENSITIVITY
GENES
GENE MUTATIONS
DNA-CLONING
TRANSCRIPTION
SPLICING
GENETIC MAPPING
SCREENING
PATIENTS
HEREDITARY DISEASES
NERVOUS SYSTEM DISEASES
CENTRAL NERVOUS SYSTEM
NEOPLASMS
PROTEINS
DOMINANT MUTATIONS
POLYMERASE CHAIN REACTION
MESSENGER-RNA
GENE REPRESSORS
CODONS