chr20-4884776-T-A

Position:

• chr20-4884776-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_005116.6(SLC23A2):​c.619A>T​(p.Ile207Phe) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: SLC23A2 NM_005116.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.24

Genes affected

SLC23A2 (HGNC:10973): (solute carrier family 23 member 2) The absorption of vitamin C into the body and its distribution to organs requires two sodium-dependent vitamin C transporters. This gene encodes one of the two required transporters and the encoded protein accounts for tissue-specific uptake of vitamin C. Previously, this gene had an official symbol of SLC23A1. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC23A2	NM_005116.6	c.619A>T	p.Ile207Phe	missense_variant	8/17	ENST00000338244.6
SLC23A2	NM_203327.2	c.619A>T	p.Ile207Phe	missense_variant	8/17

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC23A2	ENST00000338244.6	c.619A>T	p.Ile207Phe	missense_variant	8/17	1	NM_005116.6	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 28, 2022

The c.619A>T (p.I207F) alteration is located in exon 8 (coding exon 6) of the SLC23A2 gene. This alteration results from a A to T substitution at nucleotide position 619, causing the isoleucine (I) at amino acid position 207 to be replaced by a phenylalanine (F). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.27
BayesDel_addAF	Benign	-0.038	T
BayesDel_noAF	Benign	-0.29
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Benign	0.21	T;T
Eigen	Uncertain	0.39
Eigen_PC	Uncertain	0.39
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.96	.;D
M_CAP	Benign	0.020	T
MetaRNN	Uncertain	0.54	D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.9	L;L
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.67	T
PROVEAN	Uncertain	-2.5	N;N
REVEL	Benign	0.21
Sift	Benign	0.075	T;T
Sift4G	Benign	0.26	T;T
Polyphen		0.94	P;P
Vest4		0.53
MutPred		0.52		Gain of helix (P = 0.0325);Gain of helix (P = 0.0325);
MVP		0.15
MPC		2.1
ClinPred		0.94	D
GERP RS		4.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.25
gMVP		0.92

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr20-4865422;