chr20-10647030-G-C

Variant names:

• chr20-10647030-G-C
• rs200580391
• NM_000214.3:c.1794C>G

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM2 BP4_Strong BP6 BP7

The NM_000214.3(JAG1):​c.1794C>G​(p.Val598Val) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. V598V) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: JAG1 NM_000214.3 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: 1.06
• Publications: 1 publications found

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 Gene-Disease associations (from GenCC):

• Alagille syndrome due to a JAG1 point mutation

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P, ClinGen
• Charcot-Marie-Tooth disease, axonal, Type 2HH

  Inheritance: AD Classification: STRONG, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• tetralogy of fallot

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.51).
• BP6: Variant 20-10647030-G-C is Benign according to our data. Variant chr20-10647030-G-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 536537.
• BP7: Synonymous conserved (PhyloP=1.06 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000214.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	JAG1	NM_000214.3	MANE Select	c.1794C>G	p.Val598Val	synonymous	Exon 14 of 26	NP_000205.1	P78504-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	JAG1	ENST00000254958.10	TSL:1 MANE Select	c.1794C>G	p.Val598Val	synonymous	Exon 14 of 26	ENSP00000254958.4	P78504-1
	JAG1	ENST00000901230.1		c.1794C>G	p.Val598Val	synonymous	Exon 15 of 27	ENSP00000571289.1
	JAG1	ENST00000913738.1		c.1794C>G	p.Val598Val	synonymous	Exon 14 of 26	ENSP00000583797.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	-	1	Alagille syndrome due to a JAG1 point mutation (1)
-	1	-	Tetralogy of Fallot;C1866053:Deafness, congenital heart defects, and posterior embryotoxon;C1956125:Alagille syndrome due to a JAG1 point mutation;C5562003:Charcot-Marie-Tooth disease, axonal, Type 2HH (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.51
CADD	Benign	11
DANN	Benign	0.72
PhyloP100		1.1

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

Other links and lift over

dbSNP: rs200580391; hg19: chr20-10627678;