rs149419694

Positions:

chr20-10641799-C-T

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 1P and 5B. PP2BS1_SupportingBS2

The ENST00000254958.10(JAG1):c.2666G>A(p.Arg889Gln) variant causes a missense change. The variant allele was found at a frequency of 0.0000651 in 1,613,546 control chromosomes in the GnomAD database, including 1 homozygotes. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R889G) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000061 ( 1 hom. )

Consequence

JAG1
ENST00000254958.10 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:1

Conservation

PhyloP100: 3.87

Variant links:

Genes affected

JAG1 (HGNC:6188): (jagged canonical Notch ligand 1) The jagged 1 protein encoded by JAG1 is the human homolog of the Drosophilia jagged protein. Human jagged 1 is the ligand for the receptor notch 1, the latter is involved in signaling processes. Mutations that alter the jagged 1 protein cause Alagille syndrome. Jagged 1 signalling through notch 1 has also been shown to play a role in hematopoiesis. [provided by RefSeq, Nov 2019]

JAG1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), JAG1. . Gene score misZ 3.2459 (greater than the threshold 3.09). Trascript score misZ 5.2848 (greater than threshold 3.09). GenCC has associacion of gene with tetralogy of fallot, Alagille syndrome due to a JAG1 point mutation, Charcot-Marie-Tooth disease, axonal, Type 2HH.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000105 (16/152196) while in subpopulation AFR AF= 0.00029 (12/41444). AF 95% confidence interval is 0.000167. There are 0 homozygotes in gnomad4. There are 7 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High AC in GnomAd4 at 16 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
JAG1	NM_000214.3 linkuse as main transcript	c.2666G>A	p.Arg889Gln	missense_variant	22/26	ENST00000254958.10	NP_000205.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
JAG1	ENST00000254958.10 linkuse as main transcript	c.2666G>A	p.Arg889Gln	missense_variant	22/26	1	NM_000214.3	ENSP00000254958	P1	P78504-1
JAG1	ENST00000423891.6 linkuse as main transcript	n.2532G>A		non_coding_transcript_exon_variant	20/25	2
JAG1	ENST00000617965.2 linkuse as main transcript	n.3255G>A		non_coding_transcript_exon_variant	16/17	5

Frequencies

GnomAD3 genomes

AF:

0.000105

AC:

AN:

152196

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000290

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000636

AC:

AN:

251426

Hom.:

AF XY:

0.0000442

AC XY:

AN XY:

135884

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000695

Gnomad EAS exome

AF:

0.000109

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.0000609

AC:

AN:

1461350

Hom.:

Cov.:

AF XY:

0.0000674

AC XY:

AN XY:

727018

show subpopulations

Gnomad4 AFR exome

AF:

0.000149

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.000803

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000990

Gnomad4 OTH exome

AF:

0.000282

GnomAD4 genome

AF:

0.000105

AC:

AN:

152196

Hom.:

Cov.:

AF XY:

0.0000941

AC XY:

AN XY:

74352

show subpopulations

Gnomad4 AFR

AF:

0.000290

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.000288

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000174

Hom.:

Bravo

AF:

0.0000982

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000988

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jan 06, 2016	The R889Q variant of uncertain significance has been published previously in association with Alagille syndrome (Warthen et al., 2006). The variant was not observed at any significant frequency in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. R889Q is a semi-conservative amino acid substitution, which may impact secondary protein structure as these residues differ in some properties. This substitution occurs at a position where amino acids with similar properties to Arginine are tolerated across species; however, in silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -
Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Feb 01, 2023	- -

Alagille syndrome due to a JAG1 point mutation

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 04, 2023	- -
Uncertain significance, criteria provided, single submitter	curation	SIB Swiss Institute of Bioinformatics	May 31, 2018	This variant is interpreted as a Uncertain Significance - Insufficient Evidence, for Alagille syndrome 1, in Autosomal Dominant manner. The following ACMG Tag(s) were applied: BS1 => Allele frequency is greater than expected for disorder. -

Tetralogy of Fallot;C1866053:Deafness, congenital heart defects, and posterior embryotoxon;C1956125:Alagille syndrome due to a JAG1 point mutation

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 31, 2018

- -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 26, 2018

The p.R889Q variant (also known as c.2666G>A), located in coding exon 22 of the JAG1 gene, results from a G to A substitution at nucleotide position 2666. The arginine at codon 889 is replaced by glutamine, an amino acid with highly similar properties. This variant was identified in a cohort of individuals with Alagille syndrome; however, additional clinical details were not provided (Warthen DM et al. Hum. Mutat., 2006 May;27:436-43). This amino acid position is poorly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Based on available evidence to date, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.075

BayesDel_addAF

Benign

-0.097

BayesDel_noAF

Benign

-0.10

CADD

Pathogenic

DANN

Uncertain

0.98

DEOGEN2

Uncertain

0.49

Eigen

Benign

-0.095

Eigen_PC

Benign

0.024

FATHMM_MKL

Benign

0.71

LIST_S2

Uncertain

0.94

M_CAP

Benign

0.023

MetaRNN

Uncertain

0.60

MetaSVM

Benign

-0.96

MutationAssessor

Benign

1.5

MutationTaster

Benign

0.97

D;D

PrimateAI

Benign

0.43

PROVEAN

Benign

-1.3

REVEL

Benign

0.21

Sift

Benign

0.14

Sift4G

Benign

0.48

Polyphen

0.31

Vest4

0.81

MVP

0.91

MPC

0.60

ClinPred

0.058

GERP RS

5.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.078

gMVP

0.47

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