Genetic Variant GALNS:c.1364+8G>A (chr16-88822581-C-T) – ACMG Classification: Benign (-12 pts)

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_StrongBP6_Very_Strong

The NM_000512.5(GALNS):c.1364+8G>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000109 in 1,612,114 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00032 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000086 ( 1 hom. )

Consequence

GALNS
NM_000512.5 splice_region, intron

Scores

Splicing: ADA: 0.00002766

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -1.25

Publications

0 publications found

Variant links:

Genes affected

GALNS (HGNC:4122): (galactosamine (N-acetyl)-6-sulfatase) This gene encodes N-acetylgalactosamine-6-sulfatase which is a lysosomal exohydrolase required for the degradation of the glycosaminoglycans, keratan sulfate, and chondroitin 6-sulfate. Sequence alterations including point, missense and nonsense mutations, as well as those that affect splicing, result in a deficiency of this enzyme. Deficiencies of this enzyme lead to Morquio A syndrome, a lysosomal storage disorder. [provided by RefSeq, Jul 2008]

GALNS Gene-Disease associations (from GenCC):

mucopolysaccharidosis type 4A
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, G2P, Labcorp Genetics (formerly Invitae), Genomics England PanelApp

GALNS links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -12 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.86).

BP6

Variant 16-88822581-C-T is Benign according to our data. Variant chr16-88822581-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 528325.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000512.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
GALNS	NM_000512.5	MANE Select	c.1364+8G>A	splice_region intron	N/A	NP_000503.1	P34059
GALNS	NM_001323544.2		c.1382+8G>A	splice_region intron	N/A	NP_001310473.1
GALNS	NM_001323543.2		c.809+8G>A	splice_region intron	N/A	NP_001310472.1	Q6YL38

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
GALNS	ENST00000268695.10	TSL:1 MANE Select	c.1364+8G>A	splice_region intron	N/A	ENSP00000268695.5	P34059
GALNS	ENST00000562593.5	TSL:1	n.4773+8G>A	splice_region intron	N/A
GALNS	ENST00000862787.1		c.1475+8G>A	splice_region intron	N/A	ENSP00000532846.1

Frequencies

GnomAD3 genomes

AF:

0.000322

AC:

AN:

152086

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000773

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000103

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000152

AC:

AN:

249448

AF XY:

0.000126

show subpopulations

Gnomad AFR exome

AF:

0.000560

Gnomad AMR exome

AF:

0.000434

Gnomad ASJ exome

AF:

0.000401

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000445

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.0000863

AC:

126

AN:

1459910

Hom.:

Cov.:

AF XY:

0.0000730

AC XY:

AN XY:

726210

show subpopulations

African (AFR)

AF:

0.000986

AC:

AN:

33464

American (AMR)

AF:

0.000448

AC:

AN:

44690

Ashkenazi Jewish (ASJ)

AF:

0.000306

AC:

AN:

26104

East Asian (EAS)

AF:

0.000202

AC:

AN:

39654

South Asian (SAS)

AF:

0.000104

AC:

AN:

86220

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52128

Middle Eastern (MID)

AF:

0.000347

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.0000261

AC:

AN:

1111556

Other (OTH)

AF:

0.000282

AC:

AN:

60328

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.490

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

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:

0.000322

AC:

AN:

152204

Hom.:

Cov.:

AF XY:

0.000416

AC XY:

AN XY:

74434

show subpopulations

African (AFR)

AF:

0.000770

AC:

AN:

41532

American (AMR)

AF:

0.000588

AC:

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.000288

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000103

AC:

AN:

67978

Other (OTH)

AF:

0.00

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

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:

0.000311

Hom.:

Bravo

AF:

0.000404

ClinVar

ClinVar submissions

Significance:Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Mucopolysaccharidosis, MPS-IV-A (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.86

CADD

Benign

1.6

(source)

DANN

Benign

0.39

PhyloP100

-1.2

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000028

dbscSNV1_RF

Benign

0.0020

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

Computational scores

Splicing

Publications

Other links and lift over