Volume 70, Issue 4 pp. 411-416
Full Access

Identification of a CpG mutation in the coagulation factor-IX gene by analysis of amplified DNA sequences

V. Siguret

V. Siguret

INSERM U.143, Hôpital de Bicêtre, 94275 Paris

Search for more papers by this author
S. Amselem

S. Amselem

INSERM U.91, Hôpital Henri Mondor, 94010 Créteil, France

Search for more papers by this author
M. Vidaud

M. Vidaud

INSERM U.143, Hôpital de Bicêtre, 94275 Paris

Search for more papers by this author
Z. Assouline

Z. Assouline

INSERM U.143, Hôpital de Bicêtre, 94275 Paris

Search for more papers by this author
D. Kerbiriou-Nabias

D. Kerbiriou-Nabias

INSERM U.143, Hôpital de Bicêtre, 94275 Paris

Search for more papers by this author
G. Piétu

G. Piétu

INSERM U.143, Hôpital de Bicêtre, 94275 Paris

Search for more papers by this author
M. Goossens

M. Goossens

INSERM U.91, Hôpital Henri Mondor, 94010 Créteil, France

Search for more papers by this author
M. J. Larrieu

M. J. Larrieu

INSERM U.143, Hôpital de Bicêtre, 94275 Paris

Search for more papers by this author
B. Bahnak

B. Bahnak

INSERM U.143, Hôpital de Bicêtre, 94275 Paris

Search for more papers by this author
D. Meyer

D. Meyer

INSERM U.143, Hôpital de Bicêtre, 94275 Paris

Search for more papers by this author
J. M. Lavergne

Corresponding Author

J. M. Lavergne

Dr J. M. Lavergne, INSERM U.143, Hôpital de Bicêtre, 94275 Bicêtre Cedex, France.Search for more papers by this author
First published: December 1988
Citations: 10

Abstract

In a family with no previous bleeding history, the sister of a single, severely affected haemophilia B patient requested carrier detection and prenatal diagnosis. In Southern blots, using Taq I digested DNA and a factor-IX cDNA probe, a normal invariant band at 1.6 kb was missing in the haemophiliac suggesting the loss of the Taq I site at the 5’end of exon h. A 162 bp sequence which includes the suspected mutant region was amplified by the polymerase chain reaction in each DNA. Two oligonucleotide probes were synthesized and differed by only one base pair which substituted a T for C in the normal Taq I recognition sequence. The amplified DNA was dot-blotted and hybridized with the labelled probes. The altered sequence hybridized to DNA from the affected individual, his sister and her fetus and not to DNA from the normals. The mutation, involving the haemophiliac, his mother, his sister and and her fetus, transforms a CGA codon that encodes for arginine in the catalytic domain of the protein into a UGA stop codon.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.