Genetic Variant SLC44A2:p.Gly291Ser (chr19-10634803-G-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_020428.4(SLC44A2):c.871G>A(p.Gly291Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000253 in 1,614,136 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00028 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00025 ( 0 hom. )

Consequence

SLC44A2
NM_020428.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 9.97

Variant links:

Genes affected

SLC44A2 (HGNC:17292): (solute carrier family 44 member 2 (CTL2 blood group)) Enables choline transmembrane transporter activity. Involved in choline transport and transmembrane transport. Located in mitochondrion and plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

SLC44A2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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 rank	MANE	Protein	UniProt
SLC44A2	NM_020428.4 link	c.871G>A	p.Gly291Ser	missense_variant	Exon 11 of 22	ENST00000335757.10	NP_065161.3	Q8IWA5-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC44A2	ENST00000335757.10 link	c.871G>A	p.Gly291Ser	missense_variant	Exon 11 of 22	1	NM_020428.4	ENSP00000336888.4		Q8IWA5-1

Frequencies

GnomAD3 genomes

AF:

0.000283

AC:

AN:

152152

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00190

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000191

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000147

AC:

AN:

251346

Hom.:

AF XY:

0.000169

AC XY:

AN XY:

135842

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000405

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000202

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000250

AC:

365

AN:

1461866

Hom.:

Cov.:

AF XY:

0.000248

AC XY:

180

AN XY:

727230

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000313

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000297

Gnomad4 OTH exome

AF:

0.000281

GnomAD4 genome

AF:

0.000282

AC:

AN:

152270

Hom.:

Cov.:

AF XY:

0.000390

AC XY:

AN XY:

74448

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00190

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000191

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000152

Hom.:

Bravo

AF:

0.000174

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000988

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 20, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.871G>A (p.G291S) alteration is located in exon 11 (coding exon 11) of the SLC44A2 gene. This alteration results from a G to A substitution at nucleotide position 871, causing the glycine (G) at amino acid position 291 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

0.27

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.32

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.22

.;T;.

Eigen

Uncertain

0.49

Eigen_PC

Uncertain

0.56

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.95

D;D;D

M_CAP

Benign

0.012

MetaRNN

Uncertain

0.51

D;D;D

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.5

.;M;M

PrimateAI

Uncertain

0.57

PROVEAN

Uncertain

-2.5

D;D;.

REVEL

Benign

0.19

Sift

Benign

0.21

T;T;.

Sift4G

Benign

0.17

T;T;T

Polyphen

0.95

P;P;P

Vest4

0.83

MVP

0.58

MPC

0.43

ClinPred

0.22

GERP RS

5.5

Varity_R

0.27

gMVP

0.73

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over