Submissions for variant NM_001042492.3(NF1):c.3883A>G (p.Thr1295Ala)

gnomAD frequency: 0.00004  dbSNP: rs143836226

Total submissions: 16

Submitter	RCV	SCV	Clinical significance	Condition	Last evaluated	Review status	Method	Comment
Ambry Genetics	RCV000165261	SCV000215977	likely benign	Hereditary cancer-predisposing syndrome	2015-11-28	criteria provided, single submitter	clinical testing	Insufficient evidence
Invitae	RCV000205468	SCV000260388	benign	Neurofibromatosis, type 1	2024-01-31	criteria provided, single submitter	clinical testing
GeneDx	RCV000680330	SCV000518631	likely benign	not provided	2018-01-25	criteria provided, single submitter	clinical testing	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease.
Fulgent Genetics, Fulgent Genetics	RCV000515307	SCV000611411	uncertain significance	Neurofibromatosis, familial spinal; Juvenile myelomonocytic leukemia; Neurofibromatosis, type 1; Neurofibromatosis-Noonan syndrome; Café-au-lait macules with pulmonary stenosis	2017-05-23	criteria provided, single submitter	clinical testing
Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	RCV000428670	SCV000712065	uncertain significance	not specified	2016-11-03	criteria provided, single submitter	clinical testing	Variant classified as Uncertain Significance - Favor Benign. The p.Thr1295Ala va riant in NF1 has been identified in 1 individual with clinical features of a RAS opathy disorder, but was inherited from an unaffected parent. It has been identi fied in 10/66730 European chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs143836226). Computational prediction to ols and conservation analysis suggest that the p.Thr1295Ala variant may not impa ct the protein, though this information is not predictive enough to rule out pat hogenicity. In summary, while the clinical significance of the p.Thr1295Ala vari ant is uncertain, these data suggest that it is more likely to be benign.
GeneKor MSA	RCV000165261	SCV000822096	uncertain significance	Hereditary cancer-predisposing syndrome	2018-08-01	criteria provided, single submitter	clinical testing
Illumina Laboratory Services, Illumina	RCV001122259	SCV001280964	uncertain significance	Café-au-lait macules with pulmonary stenosis	2018-01-13	criteria provided, single submitter	clinical testing	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.
Illumina Laboratory Services, Illumina	RCV000205468	SCV001280965	uncertain significance	Neurofibromatosis, type 1	2018-01-13	criteria provided, single submitter	clinical testing	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.
Illumina Laboratory Services, Illumina	RCV001122260	SCV001280966	likely benign	Neurofibromatosis-Noonan syndrome	2018-01-13	criteria provided, single submitter	clinical testing	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease.
Illumina Laboratory Services, Illumina	RCV001122261	SCV001280967	uncertain significance	Neurofibromatosis, familial spinal	2018-01-13	criteria provided, single submitter	clinical testing	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.
Women's Health and Genetics/Laboratory Corporation of America, LabCorp	RCV000428670	SCV001361020	uncertain significance	not specified	2019-08-13	criteria provided, single submitter	clinical testing	Variant summary: NF1 c.3883A>G (p.Thr1295Ala) results in a non-conservative amino acid change located in the Ras GTPase-activating domain (IPR001936) of the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00011 in 251404 control chromosomes. This frequency is not significantly higher than expected for a pathogenic variant in NF1 causing Neurofibromatosis Type 1 (0.00011 vs 0.00021), allowing no conclusion about variant significance. c.3883A>G has been reported in the literature in individuals affected with cancer of the central nervous system (Wang_2017) and other cancers (Mandelker_2017). These reports do not provide unequivocal conclusions about association of the variant with Neurofibromatosis Type 1. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Six clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 (5x VUS, 1x likely benign). Based on the evidence outlined above, the variant was classified as uncertain significance.
Baylor Genetics	RCV000205468	SCV001482853	uncertain significance	Neurofibromatosis, type 1	2020-04-10	criteria provided, single submitter	clinical testing	This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868].
Sema4, Sema4	RCV000165261	SCV002527539	uncertain significance	Hereditary cancer-predisposing syndrome	2021-08-12	criteria provided, single submitter	curation
Medical Genetics, University of Parma	RCV000205468	SCV002567762	likely benign	Neurofibromatosis, type 1	2022-08-17	criteria provided, single submitter	clinical testing
Ambry Genetics	RCV002362857	SCV002624277	likely benign	Hereditary cancer-predisposing syndrome; Cardiovascular phenotype	2020-01-07	criteria provided, single submitter	clinical testing	This alteration is classified as likely benign based on a combination of the following: population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.
Quest Diagnostics Nichols Institute San Juan Capistrano	RCV000680330	SCV004222168	uncertain significance	not provided	2014-07-22	criteria provided, single submitter	clinical testing