Genetic Variant SLC5A7:p.Thr558Ile (chr2-108010791-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_021815.5(SLC5A7):c.1673C>T(p.Thr558Ile) variant causes a missense change. The variant allele was found at a frequency of 0.000000685 in 1,460,882 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T558S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

SLC5A7
NM_021815.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.79

Publications

1 publications found

Variant links:

Genes affected

SLC5A7 (HGNC:14025): (solute carrier family 5 member 7) This gene encodes a sodium ion- and chloride ion-dependent high-affinity transporter that mediates choline uptake for acetylcholine synthesis in cholinergic neurons. The protein transports choline from the extracellular space into presynaptic terminals for synthesis into acetylcholine. Increased choline uptake results from increased density of this protein in synaptosomal plasma membranes in response to depolarization of cholinergic terminals. Dysfunction of cholinergic signaling has been implicated in various disorders including depression, attention-deficit disorder, and schizophrenia. An allelic variant of this gene is associated with autosomal dominant distal hereditary motor neuronopathy type VIIA. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2015]

SLC5A7 Gene-Disease associations (from GenCC):

neuronopathy, distal hereditary motor, type 7A
Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, ClinGen, Labcorp Genetics (formerly Invitae)
congenital myasthenic syndrome 20
Inheritance: AR Classification: STRONG Submitted by: G2P, Ambry Genetics, PanelApp Australia, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
distal hereditary motor neuropathy type 7
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
presynaptic congenital myasthenic syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

SLC5A7 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.20486504).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC5A7	NM_021815.5 link	c.1673C>T	p.Thr558Ile	missense_variant	Exon 9 of 9	ENST00000264047.3	NP_068587.1	Q9GZV3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC5A7	ENST00000264047.3 link	c.1673C>T	p.Thr558Ile	missense_variant	Exon 9 of 9	1	NM_021815.5	ENSP00000264047.2		Q9GZV3
SLC5A7	ENST00000409059.5 link	c.1673C>T	p.Thr558Ile	missense_variant	Exon 9 of 9	1		ENSP00000387346.1		Q9GZV3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000400

AC:

AN:

249992

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1460882

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726794

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33392

American (AMR)

AF:

0.00

AC:

AN:

44572

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26096

East Asian (EAS)

AF:

0.00

AC:

AN:

39690

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86154

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53140

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111726

Other (OTH)

AF:

0.00

AC:

AN:

60354

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Uncertain

0.012

BayesDel_noAF

Benign

-0.12

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.20

T;T

Eigen

Benign

0.071

Eigen_PC

Uncertain

0.26

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Benign

0.84

.;T

M_CAP

Benign

0.046

MetaRNN

Benign

0.20

T;T

MetaSVM

Uncertain

0.19

MutationAssessor

Benign

1.7

L;L

PhyloP100

3.8

PrimateAI

Uncertain

0.54

PROVEAN

Benign

-0.28

N;N

REVEL

Uncertain

0.35

Sift

Benign

0.14

T;T

Sift4G

Benign

0.17

T;T

Polyphen

0.0030

B;B

Vest4

0.34

MutPred

0.21

Loss of disorder (P = 0.0224);Loss of disorder (P = 0.0224);

MVP

0.88

MPC

0.039

ClinPred

0.35

GERP RS

6.0

Varity_R

0.21

gMVP

0.52

Mutation Taster

=34/66

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over