NM_004211.5:c.323delC

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong

The NM_004211.5(SLC6A5):c.323delC(p.Pro108LeufsTer27) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000112 in 1,607,440 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

SLC6A5
NM_004211.5 frameshift

Scores

Not classified

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:3

Conservation

PhyloP100: -0.0860

Publications

3 publications found

Variant links:

Genes affected

SLC6A5 (HGNC:11051): (solute carrier family 6 member 5) This gene encodes a sodium- and chloride-dependent glycine neurotransmitter transporter. This integral membrane glycoprotein is responsible for the clearance of extracellular glycine during glycine-mediated neurotransmission. This protein is found in glycinergic axons and maintains a high presynaptic pool of neurotransmitter at glycinergic synapses. Mutations in this gene cause hyperekplexia; a heterogenous neurological disorder characterized by exaggerated startle responses and neonatal apnea. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2016]

SLC6A5 Gene-Disease associations (from GenCC):

hyperekplexia 3
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
hereditary hyperekplexia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

SLC6A5 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 16 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PP5

Variant 11-20601443-GC-G is Pathogenic according to our data. Variant chr11-20601443-GC-G is described in ClinVar as Pathogenic. ClinVar VariationId is 38371.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC6A5	NM_004211.5 link	c.323delC	p.Pro108LeufsTer27	frameshift_variant	Exon 2 of 16	ENST00000525748.6	NP_004202.4	Q9Y345-1Q4VAM4Q4VAM6
SLC6A5	NM_001318369.2 link	c.-241delC		5_prime_UTR_variant	Exon 2 of 15		NP_001305298.1	Q9Y345-2Q4VAM4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC6A5	ENST00000525748.6 link	c.323delC	p.Pro108LeufsTer27	frameshift_variant	Exon 2 of 16	1	NM_004211.5	ENSP00000434364.2		Q9Y345-1
SLC6A5	ENST00000298923.11 link	n.323delC		non_coding_transcript_exon_variant	Exon 2 of 15	1		ENSP00000298923.7		J3KNC4

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152196

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000173

AC:

AN:

231172

AF XY:

0.0000317

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:

0.0000388

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000117

AC:

AN:

1455244

Hom.:

Cov.:

AF XY:

0.0000152

AC XY:

AN XY:

723446

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33376

American (AMR)

AF:

0.0000229

AC:

AN:

43672

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25932

East Asian (EAS)

AF:

0.00

AC:

AN:

39420

South Asian (SAS)

AF:

0.00

AC:

AN:

85326

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52522

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5734

European-Non Finnish (NFE)

AF:

0.0000144

AC:

AN:

1109178

Other (OTH)

AF:

0.00

AC:

AN:

60084

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:

0.00000657

AC:

AN:

152196

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74352

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41460

American (AMR)

AF:

0.00

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68030

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.625

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000113

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hyperekplexia 3

Pathogenic:3

Jan 19, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change creates a premature translational stop signal (p.Pro108Leufs*27) in the SLC6A5 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in SLC6A5 are known to be pathogenic (PMID: 14622583, 16751771, 22700964). This variant is present in population databases (rs281864923, gnomAD 0.004%). This premature translational stop signal has been observed in individual(s) with hyperekplexia (PMID: 22700964). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. This variant is also known as DeltaC [319‚Äì323] (P108L + fs25). ClinVar contains an entry for this variant (Variation ID: 38371). For these reasons, this variant has been classified as Pathogenic. -

Oct 04, 2012

GeneReviews

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:curation

- -

May 11, 2022

Baylor Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

-0.086

Mutation Taster

=15/185

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over