8-42417233-C-A

Variant names:

• chr8-42417233-C-A
• rs1803657
• NM_001257180.2:c.*570G>T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_001257180.2(SLC20A2):​c.*570G>T variant causes a 3 prime UTR change. The variant allele was found at a frequency of 0.0836 in 153,296 control chromosomes in the GnomAD database, including 1,734 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.084 (1734 hom., cov: 32)
  • Exomes 𝑓: 0.0053 (0 hom.)
• Consequence: SLC20A2 NM_001257180.2 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 3.79

Genes affected

SLC20A2 (HGNC:10947): (solute carrier family 20 member 2) This gene encodes a member of the inorganic phosphate transporter family. The encoded protein is a type 3 sodium-dependent phosphate symporter that plays an important role in phosphate homeostasis by mediating cellular phosphate uptake. The encoded protein also confers susceptibility to viral infection as a gamma-retroviral receptor. Mutations in this gene may play a role in familial idiopathic basal ganglia calcification. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Mar 2012]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.48).
• BP6: Variant 8-42417233-C-A is Benign according to our data. Variant chr8-42417233-C-A is described in ClinVar as [Benign]. Clinvar id is 363056.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.279 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC20A2	NM_001257180.2	c.*570G>T		3_prime_UTR_variant	Exon 11 of 11	ENST00000520262.6	NP_001244109.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC20A2	ENST00000520262	c.*570G>T		3_prime_UTR_variant	Exon 11 of 11	2	NM_001257180.2	ENSP00000429754.1
SLC20A2	ENST00000342228	c.*570G>T		3_prime_UTR_variant	Exon 11 of 11	1		ENSP00000340465.3

Frequencies

GnomAD3 genomes AF: 0.0840 AC: 12766 AN: 152056 Hom.: 1726 Cov.: 32

Gnomad AFR AF: 0.283

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0358

Gnomad ASJ AF: 0.00980

Gnomad EAS AF: 0.000192

Gnomad SAS AF: 0.0221

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0380

Gnomad NFE AF: 0.00319

Gnomad OTH AF: 0.0660

GnomAD4 exome AF: 0.00535 AC: 6 AN: 1122 Hom.: 0 Cov.: 0 AF XY: 0.00733 AC XY: 4 AN XY: 546

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0102

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00338

Gnomad4 OTH exome AF: 0.0313

GnomAD4 genome AF: 0.0842 AC: 12810 AN: 152174 Hom.: 1734 Cov.: 32 AF XY: 0.0801 AC XY: 5963 AN XY: 74402

Gnomad4 AFR AF: 0.284

Gnomad4 AMR AF: 0.0357

Gnomad4 ASJ AF: 0.00980

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.0209

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00319

Gnomad4 OTH AF: 0.0648

Alfa AF: 0.0553 Hom.: 248

Bravo AF: 0.0949

Asia WGS AF: 0.0280 AC: 99 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:1

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Idiopathic basal ganglia calcification 1 Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: 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 benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.48
CADD	Benign	18
DANN	Benign	0.67

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: rs1803657; hg19: chr8-42274751;