Submissions for variant NM_007294.4(BRCA1):c.4159T>C (p.Ser1387Pro)

dbSNP: rs876658221

Total submissions: 7

Submitter	RCV	SCV	Clinical significance	Condition	Last evaluated	Review status	Method	Comment
Laboratory of Molecular Diagnosis of Cancer, West China Hospital, Sichuan University	RCV000240798	SCV000265886	uncertain significance	Breast neoplasm	2015-11-01	criteria provided, single submitter	research
Ambry Genetics	RCV000215986	SCV000273172	uncertain significance	Hereditary cancer-predisposing syndrome	2023-01-27	criteria provided, single submitter	clinical testing	The p.S1387P variant (also known as c.4159T>C), located in coding exon 10 of the BRCA1 gene, results from a T to C substitution at nucleotide position 4159. The serine at codon 1387 is replaced by proline, an amino acid with similar properties. This alteration was observed with an allele frequency of 0.00014 in 7,051 unselected female breast cancer patients and was observed with an allele frequency of 0.00018 in 11,241 female controls of Japanese ancestry. In addition, it was not observed in unselected male breast cancer patients and was observed with an allele frequency of 0.0002 in 12490 male controls of Japanese ancestry (Momozawa Y et al. Nat Commun. 2018 10;9:4083). This alteration was also identified in a cohort of Chinese patients at high risk to have hereditary breast and ovarian cancer predisposition (Shao D et al. Cancer Sci. 2020 Feb;111:647-657), as well as in 1/507 unselected Chinese breast cancer patients (Zhong X et al. PLoS ONE. 2016 Jun;11:e0156789). Another study reported that this variant was not found in 7636 unselected prostate cancer patients, but was present at an allele frequency of 0.00016 in 12,366 male controls of Japanese ancestry (Momozawa Y et al. J Natl Cancer Inst. 2020 Apr;112(4):369-376). Additionally, this alteration is located at a BRCA1 residue phosphorylated by ATM, which is required for induction of the S-phase checkpoint in response to DNA damage (Goldstein M et al. Cancer Res. 2015 Jul;75:2699-707; Xu B et al. Cancer Res. 2002 Aug;62:4588-91). However, one functional study reported that this alteration had similar levels of homology-directed repair activity to wild-type, and also had similar levels of colony formation to wild-type in the presence of cisplatin and olaparib (Foo TK et al. Cancer Res. 2021 Sep;81(18):4676-4684). This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.
Counsyl	RCV000663205	SCV000786388	uncertain significance	Breast-ovarian cancer, familial, susceptibility to, 1	2018-04-24	criteria provided, single submitter	clinical testing
Color Diagnostics, LLC DBA Color Health	RCV000215986	SCV001354413	uncertain significance	Hereditary cancer-predisposing syndrome	2023-11-29	criteria provided, single submitter	clinical testing	This missense variant replaces serine with proline at codon 1387 of the BRCA1 protein. Computational prediction suggests that this variant may not impact protein structure and function. To our knowledge, functional studies have not been reported for this variant. This variant has been reported in at least two individuals affected with breast cancer and in four unaffected individuals (PMID: 27257965, 30287823). This variant also has been reported in a prostate cancer and a pancreatic cancer case-control study in which it was only detected in unaffected individuals (PMID: 31214711, 32980694). This variant has been identified in 1/248290 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance.
Invitae	RCV001319504	SCV001510249	uncertain significance	Hereditary breast ovarian cancer syndrome	2023-09-11	criteria provided, single submitter	clinical testing	This sequence change replaces serine, which is neutral and polar, with proline, which is neutral and non-polar, at codon 1387 of the BRCA1 protein (p.Ser1387Pro). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with breast and/or ovarian cancer (PMID: 27257965, 30287823, 30702160). ClinVar contains an entry for this variant (Variation ID: 224433). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on BRCA1 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.
Laboratory of Molecular Epidemiology of Birth Defects, West China Second University Hospital, Sichuan University	RCV003153490	SCV003843639	likely pathogenic	Ovarian cancer	2022-01-01	criteria provided, single submitter	clinical testing
Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	RCV003493510	SCV004242814	likely benign	not specified	2024-02-06	criteria provided, single submitter	clinical testing