Genetic Variant HAPLN2:p.Arg92Gln (chr1-156623996-G-A) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_021817.3(HAPLN2):c.275G>A(p.Arg92Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000485 in 1,608,718 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000041 ( 0 hom. )

Consequence

HAPLN2
NM_021817.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.42

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.2949131).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HAPLN2	NM_021817.3 link	c.275G>A	p.Arg92Gln	missense_variant	Exon 4 of 7	ENST00000255039.6	NP_068589.1	Q9GZV7
HAPLN2	XM_011509853.3 link	c.275G>A	p.Arg92Gln	missense_variant	Exon 4 of 7		XP_011508155.1	Q9GZV7
HAPLN2	XM_017002020.2 link	c.275G>A	p.Arg92Gln	missense_variant	Exon 5 of 8		XP_016857509.1	Q9GZV7
HAPLN2	XM_047427123.1 link	c.408G>A	p.Pro136Pro	synonymous_variant	Exon 5 of 5		XP_047283079.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HAPLN2	ENST00000255039.6 link	c.275G>A	p.Arg92Gln	missense_variant	Exon 4 of 7	1	NM_021817.3	ENSP00000255039.1		Q9GZV7

Frequencies

GnomAD3 genomes

AF:

0.000118

AC:

AN:

152212

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000386

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000299

AC:

AN:

234074

Hom.:

AF XY:

0.00000778

AC XY:

AN XY:

128476

show subpopulations

Gnomad AFR exome

AF:

0.000349

Gnomad AMR exome

AF:

0.0000298

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000968

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000412

AC:

AN:

1456506

Hom.:

Cov.:

AF XY:

0.0000318

AC XY:

AN XY:

724234

show subpopulations

Gnomad4 AFR exome

AF:

0.000330

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000388

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000406

Gnomad4 OTH exome

AF:

0.0000499

GnomAD4 genome

AF:

0.000118

AC:

AN:

152212

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74352

show subpopulations

Gnomad4 AFR

AF:

0.000386

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000604

ExAC

AF:

0.0000413

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 04, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.275G>A (p.R92Q) alteration is located in exon 4 (coding exon 2) of the HAPLN2 gene. This alteration results from a G to A substitution at nucleotide position 275, causing the arginine (R) at amino acid position 92 to be replaced by a glutamine (Q). 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

0.12

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.35

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.29

T;T

Eigen

Uncertain

0.35

Eigen_PC

Uncertain

0.28

FATHMM_MKL

Benign

0.44

LIST_S2

Uncertain

0.88

D;D

M_CAP

Uncertain

0.092

MetaRNN

Benign

0.29

T;T

MetaSVM

Benign

-0.75

PrimateAI

Uncertain

0.67

PROVEAN

Uncertain

-2.6

D;D

REVEL

Benign

0.21

Sift

Uncertain

0.0050

D;D

Sift4G

Uncertain

0.015

D;D

Polyphen

1.0

D;.

Vest4

0.23

MutPred

0.42

Loss of methylation at R92 (P = 0.0238);Loss of methylation at R92 (P = 0.0238);

MVP

0.88

MPC

1.8

ClinPred

0.72

GERP RS

4.2

Varity_R

0.44

gMVP

0.55

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.11

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