Genetic Variant SLC36A2:c.*74_*76delTTT (chr5-151316740-CAAA-C) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS1

The NM_181776.3(SLC36A2):c.*74_*76delTTT variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00709 in 886,530 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.00071 ( 0 hom., cov: 0)

Exomes 𝑓: 0.0075 ( 0 hom. )

Consequence

SLC36A2
NM_181776.3 3_prime_UTR

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.985

Publications

1 publications found

Variant links:

Genes affected

SLC36A2 (HGNC:18762): (solute carrier family 36 member 2) This gene encodes a pH-dependent proton-coupled amino acid transporter that belongs to the amino acid auxin permease 1 protein family. The encoded protein primarily transports small amino acids such as glycine, alanine and proline. Mutations in this gene are associated with iminoglycinuria and hyperglycinuria. [provided by RefSeq, Sep 2010]

SLC36A2 Gene-Disease associations (from GenCC):

iminoglycinuria
Inheritance: AR, AD Classification: SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, ClinGen, Orphanet
hyperglycinuria
Inheritance: SD, AD, AR Classification: LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), PanelApp Australia

SLC36A2 links:

ENSG00000297368 (HGNC:):

ENSG00000297368 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.00071 (36/50738) while in subpopulation EAS AF = 0.0247 (34/1376). AF 95% confidence interval is 0.0182. There are 0 homozygotes in GnomAd4. There are 27 alleles in the male GnomAd4 subpopulation. Median coverage is 0. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_181776.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC36A2	NM_181776.3	MANE Select	c.74_76delTTT		3_prime_UTR	Exon 10 of 10	NP_861441.2	Q495M3-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
SLC36A2	ENST00000335244.9	TSL:1 MANE Select	c.74_76delTTT	3_prime_UTR	Exon 10 of 10	ENSP00000334223.4	Q495M3-1
SLC36A2	ENST00000518280.5	TSL:1	n.997_999delTTT	non_coding_transcript_exon	Exon 9 of 9	ENSP00000428453.1	E5RGH8
SLC36A2	ENST00000518617.5	TSL:1	n.1094_1096delTTT	non_coding_transcript_exon	Exon 10 of 10	ENSP00000430149.1	E5RGH8

Frequencies

GnomAD3 genomes

AF:

0.000710

AC:

AN:

50736

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000545

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.0247

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00748

AC:

6253

AN:

835792

Hom.:

AF XY:

0.00723

AC XY:

3067

AN XY:

423994

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00529

AC:

AN:

18512

American (AMR)

AF:

0.00496

AC:

104

AN:

20960

Ashkenazi Jewish (ASJ)

AF:

0.00670

AC:

101

AN:

15078

East Asian (EAS)

AF:

0.00913

AC:

217

AN:

23772

South Asian (SAS)

AF:

0.00218

AC:

118

AN:

54056

European-Finnish (FIN)

AF:

0.00984

AC:

254

AN:

25814

Middle Eastern (MID)

AF:

0.0110

AC:

AN:

2552

European-Non Finnish (NFE)

AF:

0.00788

AC:

5040

AN:

639714

Other (OTH)

AF:

0.00829

AC:

293

AN:

35334

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.273

Heterozygous variant carriers

589

1178

1768

2357

2946

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

158

316

474

632

790

<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:

0.000710

AC:

AN:

50738

Hom.:

Cov.:

AF XY:

0.00121

AC XY:

AN XY:

22342

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

11324

American (AMR)

AF:

0.000545

AC:

AN:

3670

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

1712

East Asian (EAS)

AF:

0.0247

AC:

AN:

1376

South Asian (SAS)

AF:

0.00

AC:

AN:

998

European-Finnish (FIN)

AF:

0.00

AC:

AN:

924

Middle Eastern (MID)

AF:

0.00

AC:

AN:

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

29592

Other (OTH)

AF:

0.00

AC:

AN:

664

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

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:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

PhyloP100

0.98

Mutation Taster

=100/0

polymorphism

(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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5-151316740-CAAAAAAAAAAAA-CAAAAAAAAA

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

Computational scores

Splicing

Publications

Other links and lift over