11-134149466-G-T

Variant names:

• chr11-134149466-G-T
• rs597320
• NM_032801.5:c.*285G>T

Variant summary

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

The NM_032801.5(JAM3):​c.*285G>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000239 in 418,022 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000024 (0 hom.)
• Consequence: JAM3 NM_032801.5 3_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.827
• Publications: 0 publications found

Genes affected

JAM3 (HGNC:15532): (junctional adhesion molecule 3) Tight junctions represent one mode of cell-to-cell adhesion in epithelial or endothelial cell sheets, forming continuous seals around cells and serving as a physical barrier to prevent solutes and water from passing freely through the paracellular space. The protein encoded by this immunoglobulin superfamily gene member is localized in the tight junctions between high endothelial cells. Unlike other proteins in this family, the this protein is unable to adhere to leukocyte cell lines and only forms weak homotypic interactions. The encoded protein is a member of the junctional adhesion molecule protein family and acts as a receptor for another member of this family. A mutation in an intron of this gene is associated with hemorrhagic destruction of the brain, subependymal calcification, and congenital cataracts. Alternative splicing results in multiple transcript variants.[provided by RefSeq, Apr 2011]

JAM3 Gene-Disease associations (from GenCC):

• porencephaly-microcephaly-bilateral congenital cataract syndrome

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: PanelApp Australia, Orphanet, Labcorp Genetics (formerly Invitae), G2P

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.8).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
JAM3	NM_032801.5	c.*285G>T		3_prime_UTR_variant	Exon 9 of 9	ENST00000299106.9	NP_116190.3
JAM3	NM_001205329.2	c.*285G>T		3_prime_UTR_variant	Exon 8 of 8		NP_001192258.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
JAM3	ENST00000299106.9	c.*285G>T		3_prime_UTR_variant	Exon 9 of 9	1	NM_032801.5	ENSP00000299106.4
JAM3	ENST00000441717.3	c.*285G>T		3_prime_UTR_variant	Exon 8 of 8	2		ENSP00000395742.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000239 AC: 1 AN: 418022 Hom.: 0 Cov.: 2 AF XY: 0.00 AC XY: 0 AN XY: 224194

African (AFR) AF: 0.00 AC: 0 AN: 12134

American (AMR) AF: 0.00 AC: 0 AN: 22468

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 13114

East Asian (EAS) AF: 0.00 AC: 0 AN: 26102

South Asian (SAS) AF: 0.00 AC: 0 AN: 48346

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 23548

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 1814

European-Non Finnish (NFE) AF: 0.00000405 AC: 1 AN: 246982

Other (OTH) AF: 0.00 AC: 0 AN: 23514

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.80
CADD	Benign	6.7
DANN	Benign	0.82
PhyloP100		0.83

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs597320; hg19: chr11-134019361;