ABCMdb

ABCC7 p.Gln1291*

ClinVar:	c.3872A>G , p.Gln1291Arg ? , not provided c.3871C>T , p.Gln1291* ? , not provided c.3873G>C , p.Gln1291His D , Pathogenic
CF databases:	c.3872A>G , p.Gln1291Arg (CFTR1) D , Q1291R, an A->G substitution at nucleotide position 4004 in exon 20 has a haplotype of 2-2-1 (KM19-D9-J44) with seven GATT repeats. The mutation creates a new BsaJI site.

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[hide] A novel nonsense mutation (Q1291X) in exon 20 of C... Hum Mutat. 2001 Apr;17(4):356. Feldmann D, Laroze F, Troadec C, Clement A, Tournier G, Couderc R
A novel nonsense mutation (Q1291X) in exon 20 of CFTR (ABCC7) gene.
Hum Mutat. 2001 Apr;17(4):356., [PMID:11295849]

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No. Sentence Comment
0 HUMAN MUTATION Mutation and Polymorphism Report #234 (2001) Online Mutation and Polymorphism Report Authors: D. Feldmann, F. Laroze, C. Troadec, A. Clement, G. Tournier, and R. Couderc Affiliations: Laboratoire de Biochimie, Service de Pneumologie pédiatrique, Hopital A. Trousseau, APHP, Paris, France Corresponding Author Address and E-mail: D. Feldmann, Laboratoire de Biochimie, Hopital A. Trousseau, 26 av. du Dr A.Netter, 75571 Paris cedex 12, France; E-mail: dfeldman@infobiogen.fr Title : A novel nonsense mutation (Q1291X) in exon 20 of CFTR (ABCC7) gene Keywords: CFTR; ABCC7; Cystic Fibrosis; CF; Q1291X Species: Human Change is: Mutation Gene/Locus Name: Cystic Fibrosis Transmembrane Conductance Regulator Symbol: CFTR Genbank accession number: M551281 OMIM accession number: 602421 Locus specific database: http://www.genet.sickkids.on.ca/cftr Chromosomal location: 7q31.2 Inheritance: Germline; recessive Mutation / polymorphism name Nucleotide change-Systematic name: c4003C>T Amino acid change-Trivial name: Q1291X Mutation / polymorphism type: nonsense Polymorphism frequency: Detection method: DGGE followed by automatic sequencing Detection conditions: Exon 20 DGGE was performed using primers and conditions previously described (Fanen et al. 1992) Direct sequencing was performed using ABI Prism Big Dye dideoxy chain terminator Cycle sequencing kit. Login to comment
13 Mutation 4003C>T in exon 20 caused the nonsense mutation Q1291X. Login to comment
15 Q1291X was not identified in 250 non CF alleles and was supposed to cause CF. Login to comment
17 The patient with the genotype Q1291X/delF508, was diagnosed at the age of 3 years with diarrhea and abnormal sweat chloride values. Login to comment

[hide] Cystic fibrosis in Korean children:a case report i... J Korean Med Sci. 2005 Feb;20(1):153-7. Ahn KM, Park HY, Lee JH, Lee MG, Kim JH, Kang IJ, Lee SI
Cystic fibrosis in Korean children:a case report identified by a quantitative pilocarpine iontophoresis sweat test and genetic analysis.
J Korean Med Sci. 2005 Feb;20(1):153-7., [PMID:15716623]

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Cystic fibrosis (CF) is inherited as an autosomal recessive trait, and the mutations in cystic fibrosis transmembrane conductance regulator (CFTR) gene contributes to the CF syndrome. Although CF is common in Caucasians, it is known to be rare in Asians. Recently, we experienced two cases of CF in Korean children. The patients were girls with chronic productive cough since early infancy. Chest computed tomography showed the diffuse bronchiectasis in both lungs, and their diagnosis was confirmed by the repeated analysis of a quantitative pilocarpine iontophoresis test (QPIT). The sweat chloride concentrations of the first patient were 108.1 mM/L and 96.7 mM/L. The genetic analysis revealed that she was the compound heterozygote of Q1291X and IVS8 T5-M470V. In the second case, the sweat chloride concentrations were 95.0 mM/L and 77.5 mM/L. Although we performed a comprehensive search for the coding regions and exon-intron splicing junctions of CFTR gene, no obvious disease-related mutations were detected in the second case. To our knowledge, this is the first report of CF in Korean children identified by a QPIT and genetic analysis. The possibility of CF should be suspected in those patients with chronic respiratory symptoms even in Korea.

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22 The genetic analysis revealed that she was the compound heterozygote of Q1291X and IVS8 T5-M470V. Login to comment
64 Two disease-related mutations were identified in this patient: Q1291X and IVS8 T5-M470V. Login to comment
66 Finally, it was identified that Q1291X was from her father and IVS8 T5-M470V was from her mother in the genetic analyses of family members (Fig. 2). Login to comment
123 In the first case, IVS8 T5-M470V and Q1291X mutations were identified in each allele. Login to comment
125 Q1291X mutation evokes the deletion of C-terminal 63 amino acids from intact CFTR protein and also was shown to be associated with CF (19). Login to comment

[hide] Association between cystic fibrosis transmembrane ... Yonsei Med J. 2010 Nov;51(6):912-7. Kim KW, Lee JH, Lee MG, Kim KH, Sohn MH, Kim KE
Association between cystic fibrosis transmembrane conductance regulator gene mutations and susceptibility for childhood asthma in Korea.
Yonsei Med J. 2010 Nov;51(6):912-7., [PMID:20879059]

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PURPOSE: Classic cystic fibrosis is now known part of cystic fibrosis transmembrane conductance regulator (CFTR)-related disorders. These include a wide spectrum, from multi-system disorders, such as cystic fibrosis, to mono-symptomatic conditions, such as chronic pancreatitis or congenital bilateral absence of the vas deferens. However, respiratory disease is considered typical for the multi system disorder, cystic fibrosis, and is the major cause of morbidity and mortality. The purpose of this study was to evaluate the potential effects of CFTR gene mutations in Korean children with asthma. MATERIALS AND METHODS: We selected 14 mutations identified in Korea and each of the 48 children with and without asthma were genotyped for the case-control study. RESULTS: No significant differences were found in genotype and allele frequencies of the 9 polymorphisms observed between the non-asthma and asthma groups. In a haplotype determination based on a Bayesian algorithm, 8 haplotypes were assembled in the 98 individuals tested. However, we also did not find any significant differences in haplotype frequencies between the non-asthma and asthma groups. CONCLUSION: We have concluded that this study did not show any evidence in support of providing that CFTR genetic variations significantly contribute to the susceptibility of asthma in Korean children.

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48 Among the 14 mutations, there are no mutant variants in Q98R, I125T, A309, Q220X, and Q1291X loci in our sample and the genotype frequencies of the remaining variants are listed in Table 3. Login to comment
53 CFTR Genetic Variations Analyzed in This Study Name Nucleotide change Exon Consequence Reference - 8G / C G to C at 125 5` UTR sequence variation 9 Q98R A to G at 425 Exon 4 Gln to Arg at 98 8 I125T T to C at 506 Exon 4 Ile to Thr at 125 9 E217G A to G at 782 Exon 6a Glu to Gly at 217 9 Q220X C to T at 790 Exon 6a Gln to Stop at 220 7, 8 A309A C or G at 1059 Exon 7 Sequence variation 9 TG repeat TG10-13 IVS 8 Splicing 9 T repeat T5-9 IVS 8 Splicing 9 M470V A or G at 1540 Exon 10 Met to Val at 470 9 I556V A to G at 1798 Exon 11 Ile to Val at 556 9 T854T T to G at 2694 Exon 14a Sequence variation 9 Q1291X C to T at 4003 Exon 20 Gln to Stop at 1291 9 Q1352H G to C at 4188 Exon 22 Gln to His at 1352 9 R1453W C to T at 4489 Exon 24 Arg to Trp at 1453 9 CFTR,cysticfibrosistransmembraneconductanceregulator. Login to comment
77 In addition, Q220X and Q1291X mutations that give rise to premature stop codon can lead to aberrant function. Login to comment

[hide] Heterogeneous spectrum of CFTR gene mutations in K... Korean J Lab Med. 2011 Jul;31(3):219-24. Epub 2011 Jun 28. Jung H, Ki CS, Koh WJ, Ahn KM, Lee SI, Kim JH, Ko JS, Seo JK, Cha SI, Lee ES, Kim JW
Heterogeneous spectrum of CFTR gene mutations in Korean patients with cystic fibrosis.
Korean J Lab Med. 2011 Jul;31(3):219-24. Epub 2011 Jun 28., [PMID:21779199]

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BACKGROUND: Cystic fibrosis (CF) is one of the most common hereditary disorders among Caucasians. The most common mutations of the cystic fibrosis transmembrane conductance regulator (CFTR) gene have been well established among Caucasian populations. In Koreans, however, there are very few cases of genetically confirmed CF thus far, and the spectrum of mutations seems quite different from that observed in Caucasians. METHODS: In the present study, we describe the cases of 2 Korean CF patients, present sequencing results identifying mutations in their CFTR gene, and summarize the results of CFTR mutational spectrum from previously reported Korean CF patients. The mutations described were identified by performing direct sequencing analysis of the complete coding regions and flanking intronic sequences of the CFTR gene, followed by multiplex ligation-dependent probe amplification (MLPA) analysis in order to detect gene deletions or duplications that could not be identified by a direct sequencing method. RESULTS: Three CFTR mutations were identified in the 2 patients, including p.Q98R, c.2052delA, and c.579+5G>A. In an analysis of 9 Korean CF patients that included the 2 patients presented in this study, p.Q98R mutation was the only recurrently observed mutation with a frequency of 18.8% (3/16 alleles). Furthermore, only one of the mutations (c.3272-26A>G) was found among the 32 common mutations in the screening panel for Caucasians from the Cystic Fibrosis Mutation Database. CONCLUSIONS: Sequencing of the entire CFTR gene followed by MLPA analysis, rather than using the targeted sequencing-based screening panel for mutations commonly found in Caucasian populations, is recommended for genetic analysis of Korean CF patients.

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No. Sentence Comment
90 del Deletion + - NA NA 7 Q1291X Exon20 4,003 C>T Nonsense Sequencing + - + NA [14] IVS8 T5 Splicing Sequencing - + - NA 8 L88X Exon3 263 T>G Nonsense Sequencing + - NA NA [29] R697KfsX33 Exon13 2,089-2,090 insA Insertion Sequencing - + NA NA 9 L441P Exon9 1,454 T>C Missense Sequencing&DGGE ND - ND NA [19] Abbreviations:IVS,interveningsequence;MLPA,multiplexligation-dependentprobeamplification;ND,notdone;NA,notapplicable;DGGE,denaturinggradientgelelectrophoresis. Login to comment
81 The identified mutations included 3 missense mutations (p.Q98R, p.Q1352H, and p.L441P), 3 nonsense mutations (p.Q220X, p.Q1291X, and p.L88X), 1 duplication with frameshift (c.3908dupA), 1 insertion with frameshift (c.2089-2090insA), 4 splice site mutations (c.1766+2T>C, c.3272-26A>G, c.579+5G>A, and IVS8-T5) and 2 deletion mutations (c.2052delA and c.2623-?_2751+?del). Login to comment

[hide] Erratum: Heterogeneous spectrum of CFTR gene mutat... Ann Lab Med. 2015 Jan;35(1):185-6. doi: 10.3343/alm.2015.35.1.185.
Erratum: Heterogeneous spectrum of CFTR gene mutations in Korean patients with cystic fibrosis.
Ann Lab Med. 2015 Jan;35(1):185-6. doi: 10.3343/alm.2015.35.1.185., [PMID:25553309]

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[This corrects the article on p. 219 in vol. 31.].

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No. Sentence Comment
7 del Deletion + - NA NA 7 Q1291X Exon 20 4,003 C>T Nonsense Sequencing + - + NA [14] IVS8 T5 Splicing Sequencing - + - NA 8 L88X Exon 3 263 T>G Nonsense Sequencing + - NA NA [29] R697KfsX33 Exon 13 2,089-2,090 insA Insertion Sequencing - + NA NA 9 L441P Exon 9 1,454 T>C Missense Sequencing & DGGE ND - ND NA [19] Abbreviations: IVS, intervening sequence; MLPA, multiplex ligation-dependent probe amplification; ND, not done; NA, not applicable; DGGE, denaturing gradient gel electrophoresis. Login to comment
10 del Deletion MLPA + - NA NA 7 Q1291X Exon 20 3,871 C>T Nonsense Sequencing + - + NA [14] IVS8 T5 Splicing Sequencing - + - NA 8 L88X Exon 3 263 T>G Nonsense Sequencing + - NA NA [29] R697KfsX33 Exon 13 2,089 dupA Insertion Sequencing - + NA NA 9 L441P Exon 9 1,322 T>C Missense Sequencing & DGGE ND - ND NA [19] *Nucleotide numbers are based on the CFTR reference mRNA sequence, NM_000492.3. Login to comment