chr12-50987268-G-A

Position:

• chr12-50987268-G-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2 BP4_Strong BS1_Supporting

The NM_000617.3(SLC11A2):​c.*1057C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000691 in 1,287,196 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00020 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000051 (1 hom.)
• Consequence: SLC11A2 NM_000617.3 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0340

Genes affected

SLC11A2 (HGNC:10908): (solute carrier family 11 member 2) This gene encodes a member of the solute carrier family 11 protein family. The product of this gene transports divalent metals and is involved in iron absorption. Mutations in this gene are associated with hypochromic microcytic anemia with iron overload. A related solute carrier family 11 protein gene is located on chromosome 2. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Apr 2010]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000204 (31/152308) while in subpopulation AFR AF= 0.000625 (26/41572). AF 95% confidence interval is 0.000438. There are 0 homozygotes in gnomad4. There are 19 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
SLC11A2	NM_000617.3	c.*1057C>T		3_prime_UTR_variant	16/16	ENST00000262052.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC11A2	ENST00000262052.9	c.*1057C>T		3_prime_UTR_variant	16/16	1	NM_000617.3

Frequencies

GnomAD3 genomes AF: 0.000197 AC: 30 AN: 152190 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000603

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0000941

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.0000767 AC: 10 AN: 130462 Hom.: 0 AF XY: 0.0000983 AC XY: 7 AN XY: 71212

Gnomad AFR exome AF: 0.000492

Gnomad AMR exome AF: 0.0000411

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000959

Gnomad SAS exome AF: 0.0000447

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000603

Gnomad OTH exome AF: 0.000250

GnomAD4 exome AF: 0.0000511 AC: 58 AN: 1134888 Hom.: 1 Cov.: 36 AF XY: 0.0000467 AC XY: 26 AN XY: 556708

Gnomad4 AFR exome AF: 0.00119

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000779

Gnomad4 SAS exome AF: 0.0000394

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000174

Gnomad4 OTH exome AF: 0.000169

GnomAD4 genome AF: 0.000204 AC: 31 AN: 152308 Hom.: 0 Cov.: 32 AF XY: 0.000255 AC XY: 19 AN XY: 74464

Gnomad4 AFR AF: 0.000625

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.0000941

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.000174 Hom.: 0

Bravo AF: 0.000227

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Microcytic anemia with liver iron overload Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	2.4
DANN	Benign	0.73

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: rs767436028; hg19: chr12-51381051;