1-169463940-ATATT-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BS1_Supporting

The NM_006996.3(SLC19A2):c.*1905_*1908del variant causes a 3 prime UTR change. The variant allele was found at a frequency of 0.000441 in 151,958 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: 𝑓 0.00044 (1 hom., cov: 32)
• Consequence: SLC19A2 NM_006996.3 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: 4.98

Genes affected

SLC19A2 (HGNC:10938): (solute carrier family 19 member 2) This gene encodes the thiamin transporter protein. Mutations in this gene cause thiamin-responsive megaloblastic anemia syndrome (TRMA), which is an autosomal recessive disorder characterized by diabetes mellitus, megaloblastic anemia and sensorineural deafness. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Feb 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BS1: Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000441 (67/151958) while in subpopulation SAS AF= 0.00166 (8/4830). AF 95% confidence interval is 0.000824. There are 1 homozygotes in gnomad4. There are 30 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC19A2	NM_006996.3	c.*1905_*1908del		3_prime_UTR_variant	6/6	ENST00000236137.10
SLC19A2	NM_001319667.1	c.*1905_*1908del		3_prime_UTR_variant	5/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC19A2	ENST00000236137.10	c.*1905_*1908del		3_prime_UTR_variant	6/6	1	NM_006996.3	P1
SLC19A2	ENST00000367804.4	c.*1905_*1908del		3_prime_UTR_variant	5/5	1
SLC19A2	ENST00000643377.1	n.3121_3124del		non_coding_transcript_exon_variant	2/2

Frequencies

GnomAD3 genomes AF: 0.000441 AC: 67 AN: 151842 Hom.: 1 Cov.: 32

Gnomad AFR AF: 0.000676

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000720

Gnomad ASJ AF: 0.00259

Gnomad EAS AF: 0.000577

Gnomad SAS AF: 0.00165

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000736

Gnomad OTH AF: 0.00144

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.000441 AC: 67 AN: 151958 Hom.: 1 Cov.: 32 AF XY: 0.000404 AC XY: 30 AN XY: 74324

Gnomad4 AFR AF: 0.000674

Gnomad4 AMR AF: 0.000719

Gnomad4 ASJ AF: 0.00259

Gnomad4 EAS AF: 0.000579

Gnomad4 SAS AF: 0.00166

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000736

Gnomad4 OTH AF: 0.00142

Alfa AF: 0.000214 Hom.: 0

Bravo AF: 0.000529

Asia WGS AF: 0.00118 AC: 4 AN: 3416

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

Megaloblastic anemia, thiamine-responsive, with diabetes mellitus and sensorineural deafness Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Thiamine-responsive megaloblastic anemia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Computational scores

Source: dbNSFP v4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs745730912; hg19: chr1-169433178;