Acceptor Splice Site SNP

2020 ◽  
Author(s):  
Keyword(s):  
Splice Site ◽  
Acceptor Splice Site

scholarly journals A novel CHD7 variant disrupting acceptor splice site in a patient with mild features of CHARGE syndrome: a case report

2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Evelina Siavrienė ◽  
Gunda Petraitytė ◽  
Violeta Mikštienė ◽  
Tautvydas Rančelis ◽  
Živilė Maldžienė ◽  
...  
Keyword(s):  
Case Report ◽  
Splice Site ◽  
Charge Syndrome ◽  
Acceptor Splice Site

scholarly journals Complete Thyroxine-Binding Globulin (TBG) Deficiency Produced by a Mutation in Acceptor Splice Site Causing Frameshift and Early Termination of Translation (TBG-Kankakee)12

1998 ◽  
Vol 83 (10) ◽  
pp. 3604-3608
Author(s):  
Gisah A. Carvalho ◽  
Roy E. Weiss ◽  
Samuel Refetoff
Keyword(s):  
Splice Site ◽  
Messenger Rna ◽  
Restriction Site ◽  
Splice Junction ◽  
Early Termination ◽  
Coding Region ◽  
Acceptor Splice Site ◽  
Exon 2 ◽  
Gene Level ◽  
Exon 1

Fourteen T4-binding globulin (TBG) variants have been identified at the gene level. They are all located in the coding region of the gene and 6 produce complete deficiency of TBG (TBG-CD). We now describe the first mutation in a noncoding region producing TBG-CD. The proband was treated for over 20 yr with L-T4 because of fatigue associated with a low concentration of serum total T4. Fifteen family members were studied showing low total T4 inherited as an X chromosome-linked trait, and affected males had undetectable TBG in serum. Sequencing of the entire coding region and promoter of the TBG gene revealed no abnormality. However, an A to G transition was found in the acceptor splice junction of intron II that produced a new HaeIII restriction site cosegregating with the TBG-CD phenotype. Sequencing exon 1 to exon 3 of TBG complementary DNA reverse transcribed from messenger RNA of skin fibroblasts from an affected male, confirmed a shift in the ag acceptor splice site. This results in the insertion of a G in exon 2 and causes a frameshift and a premature stop at codon 195. This early termination of translation predicts a truncated TBG lacking 201 amino acids.

scholarly journals Mutations in Transglutaminase 1 Gene in Autosomal Recessive Congenital Ichthyosis in Egyptian Families

2004 ◽  
Vol 20 (6) ◽  
pp. 325-332 ◽  
Author(s):  
R. M. Shawky ◽  
N.S. Sayed ◽  
N.A. Elhawary
Keyword(s):  
Restriction Endonuclease ◽  
Splice Site ◽  
Autosomal Recessive ◽  
Splice Mutation ◽  
The Other ◽  
Splice Acceptor ◽  
Acceptor Splice Site ◽  
Congenital Ichthyosis ◽  
Transglutaminase 1 ◽  
Autosomal Recessive Congenital Ichthyosis

Autosomal recessive congenital ichthyosis (ARCI) is a rare heterogeneous keratinization disorder of the skin. It is clinically divided into 2 subtypes, lamellar ichthyosis (LI) and congenital ichthyosiformis erythroderma (CIE). We investigated forty-three ARCI Egyptian individuals in 16 severe LI, and 10 CIE families. We identified 5 alleles in two Egyptian families as having intron-5/exon-6 splice acceptor mutation recognized by theMspIrestriction endonuclease. This promoted to a frequency of 9.6% for this mutation (5 splice-mutation alleles/52 alleles tested). We extended our previous dataset to update the detection of R142H mutation in 4 CIE Egyptian families and one LI phenotype (frequency of 28.8%; 15/52), whereas we still had no R141H among our Egyptian population. There was no correlation between phenotype and genotype in our study. Surprisingly, the mutant alleles detected in intron-5 acceptor splice-site were associated with the other extreme of CIE phenotypes rather than the severe LI form. We clearly demonstrated that the ARCI Egyptian families in Upper Egypt was ethnically pure and had a tendency not to be a hybrid with other populations in Lower Egypt, Delta zone and Cairo city.

scholarly journals Spectrin St Claude, a Splicing Mutation of the Human α-Spectrin Gene Associated With Severe Poikilocytic Anemia

Blood ◽  
1997 ◽  
Vol 89 (12) ◽  
pp. 4584-4590 ◽  
Author(s):  
Catherine M. Fournier ◽  
Gaël Nicolas ◽  
Patrick G. Gallagher ◽  
Didier Dhermy ◽  
Bernard Grandchamp ◽  
...  
Keyword(s):  
Splice Site ◽  
Nucleation Site ◽  
Erythrocyte Membranes ◽  
Splicing Mutation ◽  
Acceptor Splice Site ◽  
Reading Frame ◽  
Nucleotide Insertion ◽  
Asymptomatic Individuals ◽  
Exon 20 ◽  
Increased Susceptibility

Abstract An α-spectrin variant with increased susceptibility to tryptic digestion, αII/47, was previously observed in a child with severe, recessively inherited, poikilocytic anemia. The molecular basis of this variant, spectrin St Claude, has now been identified as a splicing mutation of the α-spectrin gene due to a T → G mutation in the 3′ acceptor splice site of exon 20. This polypyrimidine tract mutation creates a new acceptor splice site, AT → AG, and leads to the production of two novel mRNAs. One mRNA contains a 12 intronic nucleotide insertion upstream of exon 20. This insertion introduces a termination codon into the reading frame and is predicted to encode a truncated protein (108 kD) that lacks the nucleation site and thus cannot be assembled in the membrane. In the other mRNA, there is in-frame skipping of exon 20, predicting a truncated (277 kD) α-spectrin chain. The homozygous propositus has only truncated 277 kD α-spectrin chains in his erythrocyte membranes. His heterozygous parents are clinically and biochemically normal. This allele was identified in 3% of asymptomatic individuals from Benin, Africa.

scholarly journals A splice site mutation of alpha-spectrin gene causing skipping of exon 18 in hereditary elliptocytosis

Blood ◽  
1993 ◽  
Vol 81 (10) ◽  
pp. 2791-2798 ◽  
Author(s):  
N Alloisio ◽  
R Wilmotte ◽  
J Marechal ◽  
P Texier ◽  
L Denoroy ◽  
...  
Keyword(s):  
Splice Site ◽  
Splice Site Mutation ◽  
Low Grade ◽  
Site Mutation ◽  
Acceptor Splice Site ◽  
Genetic Lesion ◽  
Major Disadvantage ◽  
Internal Position ◽  
Alpha Spectrin ◽  
Self Association

Abstract Spectrin Oran (alpha II/21) has been reported previously as a variant of the alpha II domain. Its expression level is low (10% of total spectrin) in heterozygotes denoting a major disadvantage of the mutated alpha-chain dimer or tetramer with respect to their normal counterparts. Spectrin Oran is associated with symptomatic elliptocytosis in the homozygous state. A 1-minute digestion time allowed to perceive a fast trypsin cleavage (not existing normally) after Arg 890 (helix 3 of repeating segment alpha 9). The responsible change was the lack of amino acids 822 to 862 (helix 2 of repeating segment alpha 8). Such a situation fits with the phasing of spectrin according to which mutated helix 2 and distorted helix 3 are adjacent to one another. The internal position of the structural change accounts for the slight self-association defect. The ultimate genetic lesion was a G to A substitution (intronic position-1) in the acceptor splice site of intron 17 resulting in skipping of exon 18. The substitution also created an acceptor splice site 1 base downstream, but the latter was used at a low grade.

scholarly journals Lack of K1b9 light chains in Basilea rabbits is probably due to a mutation in an acceptor site for mRNA splicing.

1985 ◽  
Vol 162 (4) ◽  
pp. 1149-1160 ◽  
Author(s):  
E Lamoyi ◽  
R G Mage
Keyword(s):  
Light Chain ◽  
Splice Site ◽  
Molecular Basis ◽  
Mrna Splicing ◽  
Light Chains ◽  
Acceptor Site ◽  
Acceptor Splice Site ◽  
Normal Gene ◽  
Kappa Light Chains ◽  
Rule Out

Rabbits of the Basilea strain do not produce normal K1b9 light chains but continue to produce immunoglobulins with light chains of the rare K2 isotype and of lambda type. To understand the molecular basis for this unusual expression of kappa light chains in Basilea rabbits, we undertook an analysis of their kappa genes. We isolated and sequenced the mutant kappa 1b9 gene and found a substitution of A for G in the highly conserved AG dinucleotide of the 3' acceptor splice site. Although we cannot rule out additional alterations of portions of the gene we did not sequence, this spontaneous change of the G found in the normal gene provides a likely molecular explanation for the loss of K1 light chain expression in Basilea rabbits.

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