ABCC7 p.Gln30*
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c.88C>T
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p.Gln30*
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[hide] Two buffer PAGE system-based SSCP/HD analysis: a g... Eur J Hum Genet. 1999 Jul;7(5):590-8. Liechti-Gallati S, Schneider V, Neeser D, Kraemer R
Two buffer PAGE system-based SSCP/HD analysis: a general protocol for rapid and sensitive mutation screening in cystic fibrosis and any other human genetic disease.
Eur J Hum Genet. 1999 Jul;7(5):590-8., [PMID:10439967]
Abstract [show]
The large size of many disease genes and the multiplicity of mutations complicate the design of an adequate assay for the identification of disease-causing variants. One of the most successful methods for mutation detection is the single strand conformation polymorphism (SSCP) technique. By varying temperature, gel composition, ionic strength and additives, we optimised the sensitivity of SSCP for all 27 exons of the CFTR gene. Using simultaneously SSCP and heteroduplex (HD) analysis, a total of 80 known CF mutations (28 missense, 22 frameshift, 17 nonsense, 13 splicesite) and 20 polymorphisms was analysed resulting in a detection rate of 97.5% including the 24 most common mutations worldwide. The ability of this technique to detect mutations independent of their nature, frequency, and population specificity was confirmed by the identification of five novel mutations (420del9, 1199delG, R560S, A613T, T1299I) in Swiss CF patients, as well as by the detection of 41 different mutations in 198 patients experimentally analysed. We present a three-stage screening strategy allowing analysis of seven exons within 5 hours and analysis of the entire coding region within 1 week, including sequence analysis of the variants. Additionally, our protocol represents a general model for point mutation analysis in other genetic disorders and has already been successfully established for OTC deficiency, collagene deficiency, X-linked myotubular myopathy (XLMTM), Duchenne and Becker muscular dystrophy (DMD, BMD), Wilson disease (WD), Neurofibromatosis I and II, Charcot-Marie-Tooth disease, hereditary neuropathy with liability to pressure palsies, and defects in mitochondrial DNA. No other protocol published so far presents standard SSCP/HD conditions for mutation screening in different disease genes.
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20 The distribution of analysed known mutations is similar to that of the total number of mutations in the entire CFTR gene: missense mutations account for 35% (G27E, G85E, R117H, A120T, I148T, H199Y, R334W, T338I, R347P, R347H, A455E, M718K, S5449N, S5449I, G551D, R560T, R560S, S945L, S977P, I1005R, R1066C, R1070Q, M1101K, D1152H, S1235R, R1283M, N1303K, N1303H), followed by 28% of frameshift mutations (175delC, 394delTT, 457TAT- > G, 905delG, 1078delT, I507, F508, 1609delCA, 1677delTA, 2143delT, 2176insC, 218delA, 2184insA, 2869insG, 3659delC, 3732delA, 3821delT, 3905insT, 4016insT, 4172delGC, 4382delA), 21% of nonsense mutations (Q30X, Q39X, Q220X, W401X, Q525X, G542X, Q552X, R553X, V569X, E585X, K710X, R792X, Y1092X, R1162X, S1255X, W1282X, E1371X), and 16% of splice site mutations (621 + 1G- > T, 711 + 1G- > T, 711 + 5G- > A, 1717-1G- > A, 1898 + 1G- > A, 1898 + 5G- > T, 2789 + 5G- > A, 3271 + 1G- > A, 3272-26A- > G, 3601-17T- > C, 3849 + 4A- > G, 3849 + 10kbC- > T, 4374 + 1G- > T).
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ABCC7 p.Gln30* 10439967:20:638
status: NEW[hide] Heterogeneity for mutations in the CFTR gene and c... Hum Reprod. 2000 Jul;15(7):1476-83. Casals T, Bassas L, Egozcue S, Ramos MD, Gimenez J, Segura A, Garcia F, Carrera M, Larriba S, Sarquella J, Estivill X
Heterogeneity for mutations in the CFTR gene and clinical correlations in patients with congenital absence of the vas deferens.
Hum Reprod. 2000 Jul;15(7):1476-83., [PMID:10875853]
Abstract [show]
Congenital absence of the vas deferens (CAVD) is a heterogeneous disorder, largely due to mutations in the cystic fibrosis (CFTR) gene. Patients with unilateral absence of the vas deferens (CUAVD) and patients with CAVD in association with renal agenesis appear to have a different aetiology to those with isolated CAVD. We have studied 134 Spanish CAVD patients [110 congenital bilateral absence of the vas deferens (CBAVD) and 24 CUAVD], 16 of whom (six CBAVD, 10 CUAVD) had additional renal anomalies. Forty-two different CFTR mutations were identified, seven of them being novel. Some 45% of the CFTR mutations were specific to CAVD, and were not found in patients with cystic fibrosis or in the general Spanish population. CFTR mutations were detected in 85% of CBAVD patients and in 38% of those with CUAVD. Among those patients with renal anomalies, 31% carried one CFTR mutation. Anomalies in seminal vesicles and ejaculatory ducts were common in patients with CAVD. The prevalence of cryptorchidism and inguinal hernia appeared to be increased in CAVD patients, as well as nasal pathology and frequent respiratory infections. This study confirms the molecular heterogeneity of CFTR mutations in CAVD, and emphasizes the importance of an extensive CFTR analysis in these patients. In contrast with previous studies, this report suggests that CFTR might have a role in urogenital anomalies.
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180 It has been proposed that when renal anomalies coin the Spanish population: SSCP screening for 60 known mutations and exist with CAVD, a defect in the Wolffian duct is produced at identification of four new mutations (Q30X, A120T, 1812-1G→A and 3667del4).
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ABCC7 p.Gln30* 10875853:180:218
status: NEW[hide] Spectrum of mutations in the CFTR gene in cystic f... Ann Hum Genet. 2007 Mar;71(Pt 2):194-201. Alonso MJ, Heine-Suner D, Calvo M, Rosell J, Gimenez J, Ramos MD, Telleria JJ, Palacio A, Estivill X, Casals T
Spectrum of mutations in the CFTR gene in cystic fibrosis patients of Spanish ancestry.
Ann Hum Genet. 2007 Mar;71(Pt 2):194-201., [PMID:17331079]
Abstract [show]
We analyzed 1,954 Spanish cystic fibrosis (CF) alleles in order to define the molecular spectrum of mutations in the CFTR gene in Spanish CF patients. Commercial panels showed a limited detection power, leading to the identification of only 76% of alleles. Two scanning techniques, denaturing gradient gel electrophoresis (DGGE) and single strand conformation polymorphism/hetroduplex (SSCP/HD), were carried out to detect CFTR sequence changes. In addition, intragenic markers IVS8CA, IVS8-6(T)n and IVS17bTA were also analyzed. Twelve mutations showed frequencies above 1%, p.F508del being the most frequent mutation (51%). We found that eighteen mutations need to be studied to achieve a detection level of 80%. Fifty-one mutations (42%) were observed once. In total, 121 disease-causing mutations were identified, accounting for 96% (1,877 out of 1,954) of CF alleles. Specific geographic distributions for the most common mutations, p.F508del, p.G542X, c.1811 + 1.6kbA > G and c.1609delCA, were confirmed. Furthermore, two other relatively common mutations (p.V232D and c.2789 + 5G > A) showed uneven geographic distributions. This updated information on the spectrum of CF mutations in Spain will be useful for improving genetic testing, as well as to facilitate counselling in people of Spanish ancestry. In addition, this study contributes to defining the molecular spectrum of CF in Europe, and corroborates the high molecular mutation heterogeneity of Mediterranean populations.
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52 Mutation 0.46-0.35 9 c.1078delT #, p.R347P # 8 p.G85V, c.621 + 1G > T #, p.S549R (T > G) #, p.R553X #, c.3849 + 10kbC > T # 7 p.R347H #, c.1812-1G > A, p.R709X 0.30-0.10 6 p.H199Y, p.P205S, 5 p.R117H #, p.G551D #, p.W1089X, p.Y1092X, CFTR50kbdel 4 c.296 + 3insT, c.1717-1G > A #, c.1949del84, c.3849 + 1G > A 3 p.E92K, c.936delTA, c.1717-8G > A, c.1341G > A, p.A561E, c.2603delT, p.G1244E, [p.D1270N; p.R74W] 2 p.Q2X, p.P5L, CFTRdele2,3, p.S50P, p.E60K, c.405 + 1G > A, c.1677delTA, p.L558S, p.G673X, p.R851X, p.Y1014C, p.Q1100P, p.M1101K, p.D1152H, CFTRdele19, p.G1244V, p.Q1281X, p.Y1381X <0,1 1 c.124del23bp, p.Q30X, p.W57X, c.406-1G > A, p.Q98R, p.E115del, c.519delT, p.L159S, c.711 + 3A > T, p.W202X, c.875 + 1G > A, p.E278del, p.W361R, c.1215delG, p.L365P, p.A399D, c.1548delG, p.K536X, p.R560G, c.1782delA, p.L571S, [p.G576A; p.R668C], p.T582R, p.E585X, c.1898 + 1G > A, c.1898 + 3A > G, c.2051delTT, p.E692X, p.R851L, c.2711delT, c.2751 + 3A > G, c.2752-26A > G, p.D924N, p.S945L, c.3121-1G > A, p.V1008D, p.L1065R, [p.R1070W; p.R668C], [p.F1074L; 5T], p.H1085R, p.R1158X, c.3659delC #, c.3667del4, c.3737delA, c.3860ins31, c.3905insT #, c.4005 + 1G > A, p.T1299I, p.E1308X, p.Q1313X, c.4095 + 2T > A, rearrangements study (n = 4) Mutations identified in CF families with mixed European origin: c.182delT, p.L1254X, c.4010del4.
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ABCC7 p.Gln30* 17331079:52:614
status: NEW[hide] Haplotype analysis of 94 cystic fibrosis mutations... Hum Mutat. 1996;8(2):149-59. Morral N, Dork T, Llevadot R, Dziadek V, Mercier B, Ferec C, Costes B, Girodon E, Zielenski J, Tsui LC, Tummler B, Estivill X
Haplotype analysis of 94 cystic fibrosis mutations with seven polymorphic CFTR DNA markers.
Hum Mutat. 1996;8(2):149-59., [PMID:8844213]
Abstract [show]
We have analyzed 416 normal and 467 chromosomes carrying 94 different cystic fibrosis (CF) mutations with polymorphic genetic markers J44, IVS6aGATT, IVS8CA, T854, IVS17BTA, IVS17BCA, and TUB20. The number of mutations found with each haplotype is proportional to its frequency among normal chromosomes, suggesting that there is no preferential haplotype in which mutations arise and thus excluding possible selection for specific haplotypes. While many common mutations in the worldwide CF population showed absence of haplotype variation, indicating their recent origins, some mutations were associated with more than one haplotype. The most common CF mutations, delta F508, G542X, and N1303K, showed the highest number of slippage events at microsatellites, suggesting that they are the most ancient CF mutations. Recurrence was probably the case for 9 CF mutations (R117H, H199Y, R347YH, R347P, L558S, 2184insA, 3272-26A-->G, R1162X, and 3849 + 10kbC-->T). This analysis of 94 CF mutations should facilitate mutation screening and provides useful data for studies on population genetics of CF.
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108 (1992) (continued) TABLE2. CFTR Haplotypesfor Diallelic and MultiallelicDNA Markersfor 94 CF Mutations' (Continued) J44-GATT- 8CA-17BTA- No. of T854-TUB20 17BCA Mutation chromosomes % Normal Laboratory Reference 1-6-2-1 17-7-17 Q30X 1 - b ChillBn et al. (1994b) (0.7%) 23-7-17 I148T 1 0.48 b Bozon et al. (1994) 17-7-17 AF508 1 - fb fp1-6-1-1 20-7-17 AF508 1 fph17-7-17 AF508 2(-) 1-8-2-1 15-7-17 L558S 1 (-) 2- - -2 16- - CFBOkbdel#l 3 b Morral et al. (1993b) (-1 - - fb- "Allele1 denotesthe absence of the restriction site, whereas allele 2 denotes its presence.Numbers for microsatellites GAIT, IVSSCA, RIS17BTA.
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ABCC7 p.Gln30* 8844213:108:230
status: NEW[hide] Extensive analysis of 40 infertile patients with c... Hum Genet. 1995 Feb;95(2):205-11. Casals T, Bassas L, Ruiz-Romero J, Chillon M, Gimenez J, Ramos MD, Tapia G, Narvaez H, Nunes V, Estivill X
Extensive analysis of 40 infertile patients with congenital absence of the vas deferens: in 50% of cases only one CFTR allele could be detected.
Hum Genet. 1995 Feb;95(2):205-11., [PMID:7532150]
Abstract [show]
Mutations in the cystic fibrosis (CF) conductance transmembrane regulator (CFTR) gene have been detected in patients with CF and in males with infertility attributable to congenital bilateral absence of the vas deferens (CBAVD). Thirty individuals with CBAVD and 10 with congenital unilateral absence of the vas deferens (CUAVD) were analyzed by single-strand conformation analysis and denaturing gradient gel electrophoresis for mutations in most of the CFTR gene. All 40 individuals were pancreatic sufficient, but twenty patients had recurrent or sporadic respiratory infections, asthma/asthmatic bronchitis, and/or rhino-sinusitis. Agenesia or displasia of one or both seminal vesicles was detected in 30 men and other urogenital malformations were present in six subjects. Among the 40 samples, we identified 13 different CFTR mutations, two of which were previously unknown. One new mutation in exon 4 was the deletion of glutamic acid at codon 115 (delta E115). A second new mutation was found in exon 17b, viz., an A --> C substitution at position 3311, changing lysine to threonine at codon 1060 (K1060T). CFTR mutations were detected in 22 out of 30 (73.3%) CBAVD patients and in one out of 10 (10%) CUAVD individuals, showing a significantly lower incidence of CFTR mutations in CBAVD/CUAVD patients (P << 0.0001), compared with that found in the CF patient population. Only three CBAVD patients were found with more than one CFTR mutation (delta F508/L206W, delta F508/R74W + D1270N, R117H/712-1G --> T), highlighting L206W, R74W/D1270N, and R117H as benign CF mutations. Sweat electrolyte values were increased in 76.6% of CBAVD patients, but three individuals without CFTR mutations had normal sweat electrolyte levels (10% of the total CBAVD patients), suggesting that factors other than CFTR mutations are involved in CBAVD. The failure to identify a second mutation in exons and their flanking regions of the CFTR gene suggests that these mutations could be located in introns or in the promoter region of CFTR. Such mutations could result in CFTR levels below the minimum 6%-10% necessary for normal protein function.
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144 Hum Mol Genet 10: 1741-1742 Chill6n M, Casals T, Gim6nez J, Nunes V, Estivill X (1994a) Analysis of the CFTR gene in the Spanish population: SSCP- screening for 60 known mutations and identification of four new mutations (Q30X, A120T, 1812-1G->A and 3667de14).
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ABCC7 p.Gln30* 7532150:144:222
status: NEW[hide] Mutation analysis in 600 French cystic fibrosis pa... J Med Genet. 1994 Jul;31(7):541-4. Chevalier-Porst F, Bonardot AM, Gilly R, Chazalette JP, Mathieu M, Bozon D
Mutation analysis in 600 French cystic fibrosis patients.
J Med Genet. 1994 Jul;31(7):541-4., [PMID:7525963]
Abstract [show]
The cystic fibrosis transmembrane conductance regulator (CFTR) gene of 600 unrelated cystic fibrosis (CF) patients living in France (excluding Brittany) was screened for 105 different mutations. This analysis resulted in the identification of 86% of the CF alleles and complete genotyping of 76% of the patients. The most frequent mutations in this population after delta F508 (69% of the CF chromosomes) are G542X (3.3%), N1303K (1.8%), W1282X (1.5%), 1717-1G-->A (1.3%), 2184delA + 2183 A-->G (0.9%), and R553X (0.8%).
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99 15 Chillon M, Casals T, Gimenez J, Nunes V, Estivill X. Analysis of the CFTR gene in the Spanish population: SSCP screening for 60 known mutations and identification of four new mutations (Q30X, A120T, 1812-1G-+A and 3667del4.
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ABCC7 p.Gln30* 7525963:99:189
status: NEW[hide] Sensitivity of single-strand conformation polymorp... Hum Mol Genet. 1994 May;3(5):801-7. Ravnik-Glavac M, Glavac D, Dean M
Sensitivity of single-strand conformation polymorphism and heteroduplex method for mutation detection in the cystic fibrosis gene.
Hum Mol Genet. 1994 May;3(5):801-7., [PMID:7521710]
Abstract [show]
The gene responsible for cystic fibrosis (CF) contains 27 coding exons and more than 300 independent mutations have been identified. An efficient and optimized strategy is required to identify additional mutations and/or to screen patient samples for the presence of known mutations. We have tested several different conditions for performing single-stranded conformation polymorphism (SSCP) analysis in order to determine the efficiency of the method and to identify the optimum conditions for mutation detection. Each exon and corresponding exon boundaries were amplified. A panel of 134 known CF mutations were used to test the efficiency of detection of mutations. The SSCP conditions were varied by altering the percentage and cross-linking of the acrylamide, employing MDE (an acrylamide substitute), and by adding sucrose and glycerol. The presence of heteroduplexes could be detected on most gels and in some cases contributed to the ability to distinguish certain mutations. Each analysis condition detected 75-98% of the mutations, and all of the mutations could be detected by at least one condition. Therefore, an optimized SSCP analysis can be used to efficiently screen for mutations in a large gene.
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120 Exon 1: S4X (24), 186-13C-G (F£rec et al., pers. comm.); Exon 2: G27X (Shacldeton and Harris, pers. comm.), Q30X (Chilldn aal., pers. comm.), R31L (Zielenski et al., pers. comm.), Q39X (25); Exon 3: 300delA (Malone et al., pers. comm.), W57G (Ferrari et al., pers. comm.), W57X (26), E60X (Malone et al., pers. comm.), R74W (Claustres et al., pers. comm.), R75Q (27), G85E (28), 394delTT (Claustres et al., pers. comm.), L88X (Maceketal., pers. comm.), L88S (Malone et al., pers. comm.), 405 + 1G-A (Dork and Tummler, pers. comm.); Exon 4: E92K (Chillon et al., pers. comm.), E92X (D6rk a al., pers. comm.), P99L (Schwartz and Holmberg, pers. comm.), 441delA (Zielenski et al., pers. comm.), 444delA (29), 457TAT-C- (F£rec et al., pers. comm., (21), Dl 10H (14), Rl 17C (D6rk et al., pers. comm.), Rl 17H (14), A120T (Chillon et al., pers. comm.), 541delC (30), 556delA (28), I148T (Rininsland et al., pers. comm.), Q151X (Shacldeton et al., pers. comm.), 621 + 1C-T (28), 622-2A-C (31); Exon5:G178R (28), 681delC (Zielenski a al., pers. comm.), 711 + 1G-T (28); Exon 6a: H199Y (Dork and Tummler, pers. comm.), H199Q (Dean etal., pers. comm.), L206W (Claustres et al., pers. comm.), Q220X (Shacldeton and Harris, pers. comm., Schwartz and Holmberg, pers. comm.), 852del22 (32); Exon 6b: 977insA (33); Exon7:F311L(34).
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ABCC7 p.Gln30* 7521710:120:113
status: NEW[hide] A cystic fibrosis patient homozygous for the new f... J Med Genet. 1994 May;31(5):369-70. Chillon M, Casals T, Gimenez J, Nunes V, Estivill X
A cystic fibrosis patient homozygous for the new frameshift mutation 936delTA: description and clinical data.
J Med Genet. 1994 May;31(5):369-70., [PMID:8064813]
Abstract [show]
We report the identification of a new frameshift mutation (936delTA) in exon 6b of the CFTR gene. In the screening of 486 unrelated Spanish CF patients we found a patient homozygous for 936delTA (with consanguineous parents) and a patient heterozygous for delta F508 and 936delTA. Genotype-phenotype correlation studies showed that 936delTA is associated with pancreatic insufficiency and chronic pulmonary colonisation.
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58 4 Chill6n M, Casals T, Gimenez J, Nunes V, Estivill X. Analysis of the CFTR gene in the Spanish population: SSCP-screening for 60 known mutations and identification of four new mutations (Q30X, A120T, 1812-lG-+C and 3667del4).
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ABCC7 p.Gln30* 8064813:58:188
status: NEW60 Analysis of the CFTR gene in the Spanish population: SSCP-screening for 60 known mutations and identification of four new mutations (Q30X, A120T, 1812-lG-+C and 3667del4).
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ABCC7 p.Gln30* 8064813:60:133
status: NEW[hide] Analysis of the CFTR gene confirms the high geneti... Hum Genet. 1994 Apr;93(4):447-51. Chillon M, Casals T, Gimenez J, Ramos MD, Palacio A, Morral N, Estivill X, Nunes V
Analysis of the CFTR gene confirms the high genetic heterogeneity of the Spanish population: 43 mutations account for only 78% of CF chromosomes.
Hum Genet. 1994 Apr;93(4):447-51., [PMID:7513293]
Abstract [show]
We have analysed 972 unrelated Spanish cystic fibrosis patients for 70 known mutations. Analysis was performed on exons 1, 2, 3, 4, 5, 6a, 6b, 7, 10, 11, 12, 13, 14a, 14b, 15, 16, 17b, 18, 19, 20 and 21 of the cystic fibrosis transmembrane regulator gene using single strand conformation polymorphism analysis and denaturing gradient gel electrophoresis. The major mutation delta F508 accounts for 50.6% of CF chromosomes, whereas another 42 mutations account for 27.6% of CF chromosomes, with 21.8% of Spanish CF chromosomes remaining uncharacterized. At present, we have identified 36 mutations that have frequency of less than 1% and that are spread over 15 different exons. This indicates that, in the Spanish population, with the exception of delta F508 (50.6%) and G542X (8%), the mutations are not concentrated in a few exons of the gene nor are there any predominating mutations. This high degree of genetic heterogeneity is mainly a result of the different ethnic groups that have populated Spain and of the maintenance of separated population sets (Basques, Arab-Andalusian, Mediterranean, Canarian and Gallician). The high proportion of CF chromosomes still unidentified (21.8%) together with association analysis with intragenic markers suggest that at least 100 different mutations causing CF are present in our population.
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41 A Exon 13 4 0.41 621-1 G--~T Intron 4 3 0.31 P205S Exon 6a 3 0.31 936 del TA Exon 6b 3 0.31 1949 del 84 Exon 13 3 0.31 K710X Exon 13 3 0.31 CF del #1 Exon 4-7/11-18 3 0.31 L206W Exon 6a 2 0.20 R347H Exon 7 2 0.20 Y1092X Exon 17b 2 0.20 Q1100P Exon 17b 2 0.20 Q30X Exon 2 1 0.10 E92K Exon 4 1 0.10 A120T Exon 4 1 0.10 I148T Exon 4 1 0.10 H199Y Exon 6a 1 0.10 1078 del T Exon 7 1 0.10 1717-1 G--+A Intron 10 1 0.10 T582R Exon 12 1 0.10 E585X Exon 12 1 0.10 1898+3 A~---G Intron 12 1 0.10 W1098X Exon 17b 1 0.10 R1158X Exon 19 1 0.10 3667 del 4 Exon 19 1 0.10 3860 ins 31 Exon 20 1 0.10 3905 ins T Exon 20 1 0.10 Unknown 212 21.81 The Basque subset The Basques have a different genetic background with respect to other ethnic groups (Pancorbo et al. 1989) as they are the only pre-Indoeuropean group in Spain.
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ABCC7 p.Gln30* 7513293:41:259
status: NEW[hide] A new missense mutation (G27E) in exon 2 of the CF... Hum Mol Genet. 1994 Feb;3(2):365-6. Bienvenu T, Cazeneuve C, Beldjord C, Dusser D, Kaplan JC, Hubert D
A new missense mutation (G27E) in exon 2 of the CFTR gene in a mildly affected cystic fibrosis patient.
Hum Mol Genet. 1994 Feb;3(2):365-6., [PMID:7516232]
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19 We believe that the new missense mutation represents disease-causing mutation because it was not found among more than 100 normal 10% M C N 60% Figure 1. a) Detection of G27E mutation by Denaturing Gradient Gel Electrophoresis: M, G27E, C, control Q30X, N, normal sample b) DNA sequence analysis of the mutation G27E.
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ABCC7 p.Gln30* 7516232:19:248
status: NEW