NM_012434.5:c.406A>G

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 14 ACMG points: 14P and 0B. PM2PM5PP3_ModeratePP5_Very_Strong

The NM_012434.5(SLC17A5):c.406A>G(p.Lys136Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000874 in 1,614,010 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K136R) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.000072 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000089 ( 0 hom. )

Consequence

SLC17A5
NM_012434.5 missense

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:15O:1

Conservation

PhyloP100: 7.48

Publications

27 publications found

Variant links:

Genes affected

SLC17A5 (HGNC:10933): (solute carrier family 17 member 5) This gene encodes a membrane transporter that exports free sialic acids that have been cleaved off of cell surface lipids and proteins from lysosomes. Mutations in this gene cause sialic acid storage diseases, including infantile sialic acid storage disorder and and Salla disease, an adult form. [provided by RefSeq, Jul 2008]

SLC17A5 Gene-Disease associations (from GenCC):

free sialic acid storage disease
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
Salla disease
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Genomics England PanelApp, Myriad Women’s Health
free sialic acid storage disease, infantile form
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Orphanet
intermediate severe Salla disease
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

SLC17A5 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 14 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr6-73641809-T-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 2068802.Status of the report is criteria_provided_single_submitter, 1 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.938

PP5

Variant 6-73641810-T-C is Pathogenic according to our data. Variant chr6-73641810-T-C is described in ClinVar as Pathogenic. ClinVar VariationId is 21493.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_012434.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SLC17A5	NM_012434.5	MANE Select	c.406A>G	p.Lys136Glu	missense	Exon 3 of 11	NP_036566.1
SLC17A5	NM_001382633.1		c.406A>G	p.Lys136Glu	missense	Exon 3 of 12	NP_001369562.1
SLC17A5	NM_001382631.1		c.427A>G	p.Lys143Glu	missense	Exon 4 of 12	NP_001369560.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC17A5	ENST00000355773.6	TSL:1 MANE Select	c.406A>G	p.Lys136Glu	missense	Exon 3 of 11	ENSP00000348019.5
	SLC17A5	ENST00000481996.1	TSL:4	n.172A>G		non_coding_transcript_exon	Exon 2 of 5

Frequencies

GnomAD3 genomes

AF:

0.0000724

AC:

AN:

152012

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000318

AC:

AN:

251472

AF XY:

0.0000368

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000440

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000889

AC:

130

AN:

1461880

Hom.:

Cov.:

AF XY:

0.0000990

AC XY:

AN XY:

727242

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.0000224

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000756

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.0000562

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000944

AC:

105

AN:

1112002

Other (OTH)

AF:

0.000265

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

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

AF:

0.0000723

AC:

AN:

152130

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74352

show subpopulations

African (AFR)

AF:

0.0000482

AC:

AN:

41506

American (AMR)

AF:

0.000196

AC:

AN:

15272

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5170

South Asian (SAS)

AF:

0.00

AC:

AN:

4814

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10584

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000882

AC:

AN:

67998

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.539

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.0000529

Hom.:

Bravo

AF:

0.000117

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:15Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Salla disease

Pathogenic:9

Sep 16, 2020

Natera, Inc.

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

Mar 30, 2014

Counsyl

Significance:Likely pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com.

Aug 26, 2020

New York Genome Center

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Feb 24, 2025

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: SLC17A5 c.406A>G (p.Lys136Glu) results in a conservative amino acid change located in the Major facilitator superfamily domain (IPR020846) of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 3.2e-05 in 251472 control chromosomes (gnomAD). c.406A>G has been reported in the literature in individuals affected with Salla disease (Morin_2004, Mochel_2009). These data indicate that the variant is likely to be associated with disease. Multiple publications reported experimental evidence evaluating an impact on protein function and this variant affected the SLC17A5 protein function (Miyaji_2011, Morin_2004, Wreden_2005). The following publications have been ascertained in the context of this evaluation (PMID: 21781115, 20101035, 15510212, 15516337). ClinVar contains an entry for this variant (Variation ID: 21493). Based on the evidence outlined above, the variant was classified as pathogenic.

Sep 26, 2019

Biochemical Molecular Genetic Laboratory, King Abdulaziz Medical City

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

Feb 16, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces lysine, which is basic and polar, with glutamic acid, which is acidic and polar, at codon 136 of the SLC17A5 protein (p.Lys136Glu). This variant is present in population databases (rs80338795, gnomAD 0.007%). This missense change has been observed in individuals with SLC17A5-related conditions (PMID: 10947946, 16170568, 19557856). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 21493). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt SLC17A5 protein function with a positive predictive value of 80%. Experimental studies have shown that this missense change affects SLC17A5 function (PMID: 15510212, 15516337, 21781115). For these reasons, this variant has been classified as Pathogenic.

Jan 23, 2024

Baylor Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Dec 01, 2005

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

Sep 05, 2021

Genome-Nilou Lab

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not provided

Pathogenic:4

Mar 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

SLC17A5: PM3:Strong, PS4, PM2, PS3:Supporting

Nov 12, 2023

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Published functional studies demonstrate approximately 10% residual enzyme activity compared to wild-type, similar to the R39C variant, the common variant associated with Salla disease (PMID: 15516337); Another published functional study found that K136E mutant sialin protein did not transport aspartate and glutamate; however, H+/sialic acid co-transport activity was 50% of the wild-type protein, which was also similar to the results seen for the R39C variant (PMID: 21781115); Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 10947946, 19557856, 15510212, 33862140, 16170568, 32371413, 32608236, 36662855, 37713976, 37272184, 21781115, 15516337)

Nov 08, 2019

Revvity Omics, Revvity

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Oct 06, 2023

Mayo Clinic Laboratories, Mayo Clinic

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PP1_strong, PP3, PM2_moderate, PM3_very_strong, PS3, PS4_moderate

Sialic acid storage disease, severe infantile type;C1096903:Salla disease

Pathogenic:2

Feb 20, 2018

Institute for Genomic Medicine (IGM) Clinical Laboratory, Nationwide Children's Hospital

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

[ACMG/AMP: PS3, PM2, PS4_Moderate, PP3, PP5] This alteration is supported by well-established in vitro or in vivo functional studies to have a damaging effect on protein function or splicing [PS3], is absent from or rarely observed in large-scale population databases [PM2], has previously been observed in multiple unrelated patients with the same phenotype [PS4_Moderate], is predicted to be damaging by multiple functional prediction tools [PP3], was reported as a pathogenic/likely pathogenic alteration by a reputable source (ClinVar or other correspondence from a clinical testing laboratory) [PP5].

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Sialic acid storage disease, severe infantile type

Other:1

GeneReviews

Significance:not provided

Review Status:no classification provided

Collection Method:literature only

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.74

BayesDel_addAF

Pathogenic

0.23

BayesDel_noAF

Pathogenic

0.27

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.80

Eigen

Pathogenic

0.91

Eigen_PC

Pathogenic

0.86

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.89

M_CAP

Benign

0.083

MetaRNN

Pathogenic

0.94

MetaSVM

Uncertain

0.036

MutationAssessor

Pathogenic

4.1

PhyloP100

7.5

PrimateAI

Uncertain

0.50

PROVEAN

Uncertain

-3.4

REVEL

Pathogenic

0.75

Sift

Uncertain

0.0030

Sift4G

Uncertain

0.047

Polyphen

1.0

Vest4

0.98

MVP

0.92

MPC

0.87

ClinPred

0.98

GERP RS

5.8

Varity_R

0.94

gMVP

0.93

Mutation Taster

=5/95

disease causing (ClinVar)

(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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over