scholarly journals The original Lujan syndrome family has a novel missense mutation (p.N1007S) in the MED12 gene

2007 ◽  
Vol 44 (7) ◽  
pp. 472-477 ◽  
Author(s):  
C. E Schwartz ◽  
P. S Tarpey ◽  
H. A Lubs ◽  
A. Verloes ◽  
M. M May ◽  
...  
Keyword(s):  
Missense Mutation ◽  
Med12 Gene

A Novel Mutation Glyl672→Arg in Type 2A and a Homozygous Mutation in Type 2B von Willebrand Disease

1996 ◽  
Vol 76 (02) ◽  
pp. 253-257 ◽  
Author(s):  
Takeshi Hagiwara ◽  
Hiroshi Inaba ◽  
Shinichi Yoshida ◽  
Keiko Nagaizumi ◽  
Morio Arai ◽  
...  
Keyword(s):  
Missense Mutation ◽  
Novel Mutation ◽  
Point Mutations ◽  
Japanese Patients ◽  
Von Willebrand Disease ◽  
Homozygous Mutation ◽  
Missense Mutations ◽  
Reaction Products ◽  
Type 3 ◽  
Von Willebrand

SummaryGenetic materials from 16 unrelated Japanese patients with von Willebrand disease (vWD) were analyzed for mutations. Exon 28 of the von Willebrand factor (vWF) gene, where point mutations have been found most frequent, was screened by various restriction-enzyme analyses. Six patients were observed to have abnormal restriction patterns. By sequence analyses of the polymerase chain-reaction products, we identified a homozygous R1308C missense mutation in a patient with type 2B vWD; R1597W, R1597Q, G1609R and G1672R missense mutations in five patients with type 2A; and a G1659ter nonsense mutation in a patient with type 3 vWD. The G1672R was a novel missense mutation of the carboxyl-terminal end of the A2 domain. In addition, we detected an A/C polymorphism at nucleotide 4915 with HaeIII. There was no particular linkage disequilibrium of the A/C polymorphism, either with the G/A polymorphism at nucleotide 4391 detected with Hphl or with the C/T at 4891 detected with BstEll.

Severe Homozygous Protein C Deficiency: Identification of a Splice Site Missense Mutation (184, Q → H) in Exon 7 of the Protein C Gene

1994 ◽  
Vol 72 (01) ◽  
pp. 065-069 ◽  
Author(s):  
J M Soria ◽  
D Brito ◽  
J Barceló ◽  
J Fontcuberta ◽  
L Botero ◽  
...  
Keyword(s):  
Missense Mutation ◽  
Gene Product ◽  
Splice Site ◽  
Protein C ◽  
Purpura Fulminans ◽  
Single Strand Conformation Polymorphism ◽  
Donor Splice Site ◽  
Protein C Deficiency ◽  
Donor Splice ◽  
Newborn Child

SummarySingle strand conformation polymorphism (SSCP) analysis of exon 7 of the protein C gene has identified a novel splice site missense mutation (184, Q → H), in a newborn child with purpura fulminans and undetectable protein C levels. The mutation, seen in the homozygous state in the child and in the heterozygous state in her mother, was characterized and found to be a G to C nucleotide substitution at the -1 position of the donor splice site of intron 7 of the protein C gene, which changes histidine 184 for glutamine (184, Q → H). According to analysis of the normal and mutated sequences, this mutation should also abolish the function of the donor splice site of intron 7 of the protein C gene. Since such a mutation is compatible with the absence of gene product in plasma and since DNA sequencing of all protein C gene exons in this patient did not reveal any other mutation, we postulate that mutation 184, Q → H results in the absence of protein C gene product in plasma, which could be the cause of the severe phenotype observed in this patient.

A Novel Missense Mutation in the Endoglin Gene in Hereditary Hemorrhagic Telangiectasia

1997 ◽  
Vol 77 (02) ◽  
pp. 243-247 ◽  
Author(s):  
Hiroshi Yamaguchi ◽  
Hiroyuki Azuma ◽  
Toshio Shigekiyo ◽  
Hideo Inoue ◽  
Shiro Saito
Keyword(s):  
Missense Mutation ◽  
Hereditary Hemorrhagic Telangiectasia ◽  
Transforming Growth Factor ◽  
Transforming Growth Factor Β ◽  
Autosomal Dominant Disorder ◽  
Her Family ◽  
Normal Individuals ◽  
Oligonucleotide Hybridization ◽  
Vascular Dysplasia ◽  
Exon 4

SummaryHereditary hemorrhagic telangiectasia (HHT) is an autosomal dominant disorder characterized by multisystem vascular dysplasia and recurrent hemorrhage. Recent investigation has mapped one of the responsible genes for HHT to chromosome 9q33-q34; subsequently, nine different mutations have been identified in the endoglin gene, which encodes a transforming growth factor β(TGF-β) binding protein, in nine unrelated families with HHT. We examined the endoglin gene in a Japanese patient with HHT and her family members. Using PCR-SSCP. analysis followed by sequencing, we identified a C to A missense mutation in exon 4 which changed an Ala160 codon(GCT) to an Asp160 codon (GAT). Since this mutation destroys one of three Fnu4H I sites in exon 4, the Fnu4H I digestion patterns of the PCR-amplified exon 4 fragments from each family member were analyzed. In affected members, the restriction patterns were all consistent with a phenotype of HHT. PCR-amplified exon 4 fragments from 150 normal individuals were also analyzed by allele-specific oligonucleotide hybridization analysis. As a result, the mutation was not found in any of them. We conclude that the C to A mutation in exon 4 of the endoglin gene in this proband is responsible for the occurrence of HHT in this family.

2116-P: MAFA S64F Missense Mutation Causes Islet Beta-Cell Aging and Senescence

Diabetes ◽  
2020 ◽  
Vol 69 (Supplement 1) ◽  
pp. 2116-P
Author(s):  
JEEYEON CHA ◽  
EMILY M. WALKER ◽  
XIN TONG ◽  
MIN GUO ◽  
JIN HUA LIU ◽  
...  
Keyword(s):  
Beta Cell ◽  
Missense Mutation ◽  
Cell Aging ◽  
Islet Beta Cell

Missense mutation of amylin gene (S20G) in Japanese NIDDM patients

Diabetes ◽  
1996 ◽  
Vol 45 (9) ◽  
pp. 1279-1281 ◽  
Author(s):  
S. Sakagashira ◽  
T. Sanke ◽  
T. Hanabusa ◽  
H. Shimomura ◽  
S. Ohagi ◽  
...  
Keyword(s):  
Missense Mutation ◽  
Niddm Patients ◽  
Amylin Gene
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