21-25693837-G-A

Position:

chr21-25693837-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PP3PP5

The NM_021219.4(JAM2):c.323G>A(p.Arg108His) variant causes a missense change. The variant allele was found at a frequency of 0.00000248 in 1,613,924 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R108L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

JAM2
NM_021219.4 missense

Scores

Clinical Significance

Pathogenic no assertion criteria provided P:1

Conservation

PhyloP100: 6.17

Variant links:

Genes affected

JAM2 (HGNC:14686): (junctional adhesion molecule 2) This gene belongs to the immunoglobulin superfamily, and the junctional adhesion molecule (JAM) family. The protein encoded by this gene is a type I membrane protein that is localized at the tight junctions of both epithelial and endothelial cells. It acts as an adhesive ligand for interacting with a variety of immune cell types, and may play a role in lymphocyte homing to secondary lymphoid organs. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jul 2012]

JAM2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM1

In a topological_domain Extracellular (size 209) in uniprot entity JAM2_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_021219.4

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.746

PP5

Variant 21-25693837-G-A is Pathogenic according to our data. Variant chr21-25693837-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 829539.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr21-25693837-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
JAM2	NM_021219.4 linkuse as main transcript	c.323G>A	p.Arg108His	missense_variant	4/10	ENST00000480456.6
JAM2	NM_001270408.2 linkuse as main transcript	c.323G>A	p.Arg108His	missense_variant	4/10
JAM2	NM_001270407.2 linkuse as main transcript	c.215G>A	p.Arg72His	missense_variant	3/9
JAM2	NR_072999.2 linkuse as main transcript	n.887G>A		non_coding_transcript_exon_variant	4/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
JAM2	ENST00000480456.6 linkuse as main transcript	c.323G>A	p.Arg108His	missense_variant	4/10	1	NM_021219.4	P1	P57087-1
JAM2	ENST00000400532.5 linkuse as main transcript	c.323G>A	p.Arg108His	missense_variant	4/10	1			P57087-3
JAM2	ENST00000312957.9 linkuse as main transcript	c.215G>A	p.Arg72His	missense_variant	3/9	2			P57087-2
JAM2	ENST00000460679.5 linkuse as main transcript	c.191G>A	p.Arg64His	missense_variant, NMD_transcript_variant	2/9	3

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152184

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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

AF:

0.00000205

AC:

AN:

1461740

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727190

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

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:

0.00000180

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152184

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74342

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

Basal ganglia calcification, idiopathic, 8, autosomal recessive

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Mar 27, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Pathogenic

0.31

BayesDel_noAF

Pathogenic

0.21

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.34

.;T;.

Eigen

Pathogenic

0.76

Eigen_PC

Pathogenic

0.75

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.96

D;D;D

M_CAP

Uncertain

0.13

MetaRNN

Pathogenic

0.75

D;D;D

MetaSVM

Benign

-0.30

MutationAssessor

Uncertain

2.2

M;M;.

MutationTaster

Benign

1.0

D;D;D;D;D;D

PrimateAI

Benign

0.46

PROVEAN

Uncertain

-3.8

D;D;.

REVEL

Uncertain

0.43

Sift

Benign

0.051

T;D;.

Sift4G

Uncertain

0.016

D;D;D

Polyphen

1.0

.;D;.

Vest4

0.62

MutPred

0.54

Loss of MoRF binding (P = 0.0315);Loss of MoRF binding (P = 0.0315);.;

MVP

0.89

MPC

0.94

ClinPred

1.0

GERP RS

5.6

Varity_R

0.74

gMVP

0.84

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

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