Genetic Variant HAPLN1:c.-26-336C>G (chr5-83673885-G-C) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001884.4(HAPLN1):c.-26-336C>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000197 in 152,090 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.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

HAPLN1
NM_001884.4 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.0970

Publications

3 publications found

Variant links:

Genes affected

HAPLN1 (HGNC:2380): (hyaluronan and proteoglycan link protein 1) Predicted to enable hyaluronic acid binding activity. Predicted to be an extracellular matrix structural constituent conferring compression resistance. Predicted to be involved in central nervous system development and skeletal system development. Colocalizes with collagen-containing extracellular matrix. [provided by Alliance of Genome Resources, Apr 2022]

HAPLN1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.87).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001884.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HAPLN1	NM_001884.4	MANE Select	c.-26-336C>G		intron	N/A	NP_001875.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
HAPLN1	ENST00000274341.9	TSL:1 MANE Select	c.-26-336C>G	intron	N/A	ENSP00000274341.4
HAPLN1	ENST00000875523.1		c.-26-336C>G	intron	N/A	ENSP00000545582.1
HAPLN1	ENST00000936313.1		c.-26-336C>G	intron	N/A	ENSP00000606372.1

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152090

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

63140

Hom.:

AF XY:

0.00

AC XY:

AN XY:

32478

African (AFR)

AF:

0.00

AC:

AN:

740

American (AMR)

AF:

0.00

AC:

AN:

700

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

1780

East Asian (EAS)

AF:

0.00

AC:

AN:

904

South Asian (SAS)

AF:

0.00

AC:

AN:

8494

European-Finnish (FIN)

AF:

0.00

AC:

AN:

3868

Middle Eastern (MID)

AF:

0.00

AC:

AN:

330

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

42302

Other (OTH)

AF:

0.00

AC:

AN:

4022

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152090

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74302

show subpopulations

African (AFR)

AF:

0.0000724

AC:

AN:

41408

American (AMR)

AF:

0.00

AC:

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10580

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68012

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

4612

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.87

CADD

Benign

9.3

(source)

DANN

Benign

0.63

PhyloP100

0.097

PromoterAI

-0.013

Neutral

(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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over