Variant 1-156625247-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_021817.3(HAPLN2):c.886G>A(p.Ala296Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000704 in 1,421,112 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 7.0e-7 ( 0 hom. )

Consequence

HAPLN2
NM_021817.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.04

Variant links:

Genes affected

HAPLN2 (HGNC:17410): (hyaluronan and proteoglycan link protein 2) Predicted to enable hyaluronic acid binding activity. Predicted to be involved in central nervous system development and skeletal system development. Predicted to act upstream of or within establishment of blood-nerve barrier and extracellular matrix assembly. Predicted to be located in extracellular region. Predicted to be active in extracellular matrix. [provided by Alliance of Genome Resources, Apr 2022]

HAPLN2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
HAPLN2	NM_021817.3 linkuse as main transcript	c.886G>A	p.Ala296Thr	missense_variant	7/7	ENST00000255039.6
HAPLN2	XM_011509853.3 linkuse as main transcript	c.886G>A	p.Ala296Thr	missense_variant	7/7
HAPLN2	XM_017002020.2 linkuse as main transcript	c.886G>A	p.Ala296Thr	missense_variant	8/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HAPLN2	ENST00000255039.6 linkuse as main transcript	c.886G>A	p.Ala296Thr	missense_variant	7/7	1	NM_021817.3	P1
HAPLN2	ENST00000494218.1 linkuse as main transcript	n.734G>A		non_coding_transcript_exon_variant	3/3	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

7.04e-7

AC:

AN:

1421112

Hom.:

Cov.:

AF XY:

0.00000142

AC XY:

AN XY:

703276

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000255

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 27, 2022

The c.886G>A (p.A296T) alteration is located in exon 7 (coding exon 5) of the HAPLN2 gene. This alteration results from a G to A substitution at nucleotide position 886, causing the alanine (A) at amino acid position 296 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.50

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.30

Eigen

Uncertain

0.27

Eigen_PC

Uncertain

0.25

FATHMM_MKL

Uncertain

0.81

LIST_S2

Uncertain

0.97

M_CAP

Benign

0.040

MetaRNN

Uncertain

0.55

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.3

MutationTaster

Benign

0.66

PrimateAI

Uncertain

0.58

PROVEAN

Uncertain

-2.5

REVEL

Benign

0.13

Sift

Uncertain

0.015

Sift4G

Uncertain

0.033

Polyphen

0.58

Vest4

0.30

MutPred

0.74

Loss of methylation at R301 (P = 0.1114);

MVP

0.59

MPC

0.92

ClinPred

0.63

GERP RS

3.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.24

gMVP

0.79

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over