20-46733738-G-A

Position:

• chr20-46733738-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_030777.4(SLC2A10):​c.1548-18G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00137 in 1,611,506 control chromosomes in the GnomAD database, including 30 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0069 (11 hom., cov: 32)
  • Exomes 𝑓: 0.00079 (19 hom.)
• Consequence: SLC2A10 NM_030777.4 intron
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: -2.08

Genes affected

SLC2A10 (HGNC:13444): (solute carrier family 2 member 10) This gene encodes a member of the class III facilitative glucose transporter family. The encoded protein plays a role in regulation of glucose homeostasis. Mutations in this gene have been associated with arterial tortuosity syndrome.[provided by RefSeq, Dec 2009]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.0).
• BP6: Variant 20-46733738-G-A is Benign according to our data. Variant chr20-46733738-G-A is described in ClinVar as [Benign]. Clinvar id is 139180.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr20-46733738-G-A is described in Lovd as [Benign].
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00691 (1052/152280) while in subpopulation AFR AF= 0.024 (996/41550). AF 95% confidence interval is 0.0227. There are 11 homozygotes in gnomad4. There are 493 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 11 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SLC2A10	NM_030777.4	c.1548-18G>A		intron_variant		ENST00000359271.4	NP_110404.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SLC2A10	ENST00000359271.4	c.1548-18G>A		intron_variant		1	NM_030777.4	ENSP00000352216	P1

Frequencies

GnomAD3 genomes AF: 0.00675 AC: 1027 AN: 152162 Hom.: 10 Cov.: 32

Gnomad AFR AF: 0.0234

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00223

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00633

Gnomad NFE AF: 0.000162

Gnomad OTH AF: 0.00382

GnomAD3 exomes AF: 0.00192 AC: 480 AN: 250304 Hom.: 5 AF XY: 0.00139 AC XY: 188 AN XY: 135402

Gnomad AFR exome AF: 0.0258

Gnomad AMR exome AF: 0.00130

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad SAS exome AF: 0.0000980

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000709

Gnomad OTH exome AF: 0.000652

GnomAD4 exome AF: 0.000790 AC: 1153 AN: 1459226 Hom.: 19 Cov.: 30 AF XY: 0.000678 AC XY: 492 AN XY: 726046

Gnomad4 AFR exome AF: 0.0263

Gnomad4 AMR exome AF: 0.00134

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.000151

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000523

Gnomad4 OTH exome AF: 0.00220

GnomAD4 genome AF: 0.00691 AC: 1052 AN: 152280 Hom.: 11 Cov.: 32 AF XY: 0.00662 AC XY: 493 AN XY: 74458

Gnomad4 AFR AF: 0.0240

Gnomad4 AMR AF: 0.00222

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000162

Gnomad4 OTH AF: 0.00378

Alfa AF: 0.00414 Hom.: 1

Bravo AF: 0.00765

Asia WGS AF: 0.00635 AC: 22 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:3

Benign, criteria provided, single submitter	clinical testing	GeneDx	Jun 14, 2013	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. -
Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Feb 01, 2021	Variant summary: SLC2A10 c.1548-18G>A alters a non-conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. 4/4 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.0019 in 250304 control chromosomes in the gnomAD database, including 5 homozygotes. The observed variant frequency exceeds the estimated maximal expected allele frequency for a pathogenic variant in SLC2A10 causing Arterial Tortuosity Syndrome phenotype (0.0016), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.1548-18G>A in individuals affected with Arterial Tortuosity Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as benign. -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -

Arterial tortuosity syndrome Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2024	- -
Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Oct 13, 2020	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
CADD	Benign	0.0080
DANN	Benign	0.55

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs113496485; hg19: chr20-45362377;