Submissions for variant NM_000355.4(TCN2):c.903C>T (p.Tyr301=)

gnomAD frequency: 0.00026  dbSNP: rs146036025

Total submissions: 3

Submitter	RCV	SCV	Clinical significance	Condition	Last evaluated	Review status	Method	Comment
Illumina Laboratory Services, Illumina	RCV000294735	SCV000437888	uncertain significance	Transcobalamin II deficiency	2018-01-12	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.
Labcorp Genetics (formerly Invitae), Labcorp	RCV000294735	SCV001107476	likely benign	Transcobalamin II deficiency	2024-01-24	criteria provided, single submitter	clinical testing
CeGaT Center for Human Genetics Tuebingen	RCV002512075	SCV002821122	likely benign	not provided	2023-05-01	criteria provided, single submitter	clinical testing	TCN2: BP4, BP7