ABCMdb

ABCC7 p.Asp1270His

ClinVar:	c.3808G>A , p.Asp1270Asn ? , Conflicting interpretations of pathogenicity, not provided c.3808G>T , p.Asp1270Tyr ? , not provided
CF databases:	c.3808G>A , p.Asp1270Asn ? , Varying clinical consequence ; CFTR1: The patient that carries the D1270N is an otherwise healthy male wth congenital absence of the vas deferens, an autosomal recessive disorder causing male aterility. The patient also carries an [delta]F508 mutation on the other chromosome. We did not find D1270N in iver 100 CF patients or in 91 fertile CF-carrier males. c.3808G>T , p.Asp1270Tyr (CFTR1) ? , This mutation was identified in two brother siblings with CF.
Predicted by SNAP2:	A: D (91%), C: D (85%), E: D (95%), F: D (95%), G: D (95%), H: D (95%), I: D (95%), K: D (95%), L: D (95%), M: D (95%), N: D (91%), P: D (95%), Q: D (95%), R: D (95%), S: D (91%), T: D (95%), V: D (95%), W: D (95%), Y: D (95%),
Predicted by PROVEAN:	A: D, C: D, E: D, F: D, G: D, H: D, I: D, K: D, L: D, M: D, N: D, P: D, Q: D, R: D, S: D, T: D, V: D, W: D, Y: D,

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[hide] Genotype analysis and phenotypic manifestations of... Chest. 2000 Dec;118(6):1591-7. Desmarquest P, Feldmann D, Tamalat A, Boule M, Fauroux B, Tournier G, Clement A
Genotype analysis and phenotypic manifestations of children with intermediate sweat chloride test results.
Chest. 2000 Dec;118(6):1591-7., [PMID:11115444]

Abstract [show]
STUDY OBJECTIVES: Cystic fibrosis (CF) is one of the most common inherited diseases among whites. Since the cloning of the CF transmembrane conductance regulator (CFTR) gene, a number of studies have focused on associations between the genotype and phenotype in CF. This had led to the progressive identification of new groups of patients, including those who have mild lung disease and those who have normal sweat chloride values (< 60 mEq/L). The aim of the present work was to provide information on the genotype and the phenotypic characteristics of children with intermediate-range sweat chloride test results. PATIENTS AND RESULTS: We focused on children referred to the pulmonary department for various types of pulmonary disease and who had several sweat chloride test results with median values in the range of 40 to 60 mEq/L. Twenty-four patients over a 10-year period were enrolled (mean age, 4.8 years). Respiratory manifestations at initial evaluation included recurrent bronchitis, wheezing, chronic cough, and pneumonia. The duration of the follow-up ranged from 0.5 to 10.5 years. Sputum cultures revealed the presence of Haemophilus influenzae (10 children), Staphylococcus aureus (4 children), and Pseudomonas aeruginosa (3 children). Pancreatic insufficiency was found in two patients. Analysis of the entire coding sequence allowed identification of 16 known mutations in CFTR gene. Fifteen chromosomes (31.2%) carried a mutation in CFTR gene and one allele carried two mutations. Three patients were homozygous or double heterozygous (DeltaF508/DeltaF508, DeltaF508/3849 + 10 kb C-->T, S1235R/G551D). The 5-thymidine allele was identified in four children. CONCLUSION: These results indicate an higher frequency of CFTR gene mutations in patients with borderline sweat chloride test results, compared to data reported in the general population. They lead to the recommendations for complete pulmonary and GI investigations in this group of patients, as well as assiduous care and medical follow-up.

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No. Sentence Comment
82 Patient 3 was heterozygous for the mutations R75X and D1270H; however, the familial analysis revealed that the mutations R75X and D1270H were both carried by the paternal allele. Login to comment
92 Genotype Poly T 1 -/- 7T/7T 2 R117C/- 7T/7T 3 R75X-D1270H/- 7T/7T 4 -/- 7T/7T 5 G91R/- 7T/5T 6 ⌬F508/- 7T/9T 7 -/- 7T/7T 8 -/- 7T/7T 9 S1235R/G551D 5T/7T 10 ⌬F508/- 9T/9T 11 7T/7T 12 ⌬F508/⌬F508 9T/9T 13 ⌬F508/- 7T/9T 14 -/- 7T/7T 15 ⌬F508/- 7T/9T 16 -/- 7T/5T 17 -/- 7T/7T 18 -/- 7T/7T 19 -/- 7T/9T 20 ⌬F508/- 7T/9T 21 -/- 7T/7T 22 W1282X/- 7T/5T 23 -/- 7T/7T 24 ⌬F508/3849 ϩ 10 kb C 3 T 7T/7T 1594 Clinical Investigations reported in the general population (frequency of the 5T allele in the general population, 5.2%).26 Based on the results of DNA analysis and according to the consensus statement on the diagnosis of CF, three patients (patients 9, 12, and 24) met the criteria of both respiratory manifestations and identification of two CF mutations.21 For patient 6, there was a diagnostic dilemma. Login to comment
98 Results indicated that 15 (of 48) chromosomes had a known mutation in CFTR gene, with 1 chromosome bearing two mutations (R75X and D1270H). Login to comment

[hide] CFTR haplotype analysis reveals genetic heterogene... Am J Hum Genet. 1995 Jun;56(6):1359-66. Rave-Harel N, Madgar I, Goshen R, Nissim-Rafinia M, Ziadni A, Rahat A, Chiba O, Kalman YM, Brautbar C, Levinson D, et al.
CFTR haplotype analysis reveals genetic heterogeneity in the etiology of congenital bilateral aplasia of the vas deferens.
Am J Hum Genet. 1995 Jun;56(6):1359-66., [PMID:7539210]

Abstract [show]
Congenital bilateral aplasia of the vas deferens (CBAVD) was suggested to be a mild form of cystic fibrosis (CF). Mutation analysis of the cystic fibrosis transmembrane conductance regulator (CFTR) gene in males with CBAVD revealed that in some males CBAVD is caused by two defective CFTR alleles. The genetic basis of CBAVD in the other males and its association with CF remained unclear. We undertook this study to test the hypothesis of commonality of CBAVD and CF by haplotype analysis, in the CFTR locus, of males suffering from CBAVD and of their families. According to the hypothesis of commonality of CBAVD and CF, two brothers with CBAVD are expected to carry the same two CFTR alleles, while their fertile brothers are expected to carry at least one different allele. Eleven families were studied, of which two families, with unidentified CFTR mutations, did not support this hypothesis. In these families two brothers with CBAVD inherited different CFTR alleles. Their fertile brothers inherited the same CFTR alleles as their brothers with CBAVD. These results provide evidence for genetic heterogeneity in CBAVD. Though in some families CBAVD is associated with two CFTR mutations, we suggest that in others it is caused by other mechanisms, such as mutations at other loci or homozygosity or heterozygosity for partially penetrant CFTR mutations.

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No. Sentence Comment
41 1992b); and D1270H (Anguiano et al. 1992). Login to comment
42 The R117H mutation (Dean et al. Login to comment
60 In addition, the mutations R117H and D1270H, previously found in CBAVD patients from other populations (Anguiano et al. 1992), were analyzed. Login to comment
61 In addition, the mutations R117H and D1270H, previously found in CBAVD patients from other populations (Anguiano et al. 1992), were analyzed. Login to comment