chr17-19555613-T-C

Position:

• chr17-19555613-T-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_018242.3(SLC47A1):​c.662T>C​(p.Leu221Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,892 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: SLC47A1 NM_018242.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0270

Genes affected

SLC47A1 (HGNC:25588): (solute carrier family 47 member 1) This gene is located within the Smith-Magenis syndrome region on chromosome 17. It encodes a protein of unknown function. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.03711468).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SLC47A1	NM_018242.3	c.662T>C	p.Leu221Ser	missense_variant	8/17	ENST00000270570.8	NP_060712.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SLC47A1	ENST00000270570.8	c.662T>C	p.Leu221Ser	missense_variant	8/17	1	NM_018242.3	ENSP00000270570	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461892 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727246

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.00

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: 0.00

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

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

Jul 13, 2021

The c.662T>C (p.L221S) alteration is located in exon 8 (coding exon 8) of the SLC47A1 gene. This alteration results from a T to C substitution at nucleotide position 662, causing the leucine (L) at amino acid position 221 to be replaced by a serine (S). 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	0.12
BayesDel_addAF	Benign	-0.27	T
BayesDel_noAF	Benign	-0.62
CADD	Benign	3.3
DANN	Benign	0.65
DEOGEN2	Benign	0.0053	T;T;.
Eigen	Benign	-1.6
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.0062	N
LIST_S2	Benign	0.53	T;T;T
M_CAP	Benign	0.0036	T
MetaRNN	Benign	0.037	T;T;T
MetaSVM	Benign	-0.97	T
MutationAssessor	Benign	-1.6	.;N;N
MutationTaster	Benign	1.0	N;N;N;N;N;N;N
PrimateAI	Benign	0.26	T
PROVEAN	Benign	1.2	N;N;N
REVEL	Benign	0.025
Sift	Benign	0.34	T;T;T
Sift4G	Benign	0.27	T;T;T
Polyphen		0.0	B;B;B
Vest4		0.16
MutPred		0.53		.;Loss of stability (P = 0.0306);Loss of stability (P = 0.0306);
MVP		0.030
MPC		0.23
ClinPred		0.20	T
GERP RS		-1.8
Varity_R		0.026
gMVP		0.13

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.090		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: rs1916580843; hg19: chr17-19458926;