Genetic Variant TREM2:p.Glu202* (chr6-41158659-C-A) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PVS1_ModeratePM2

The NM_001271821.2(TREM2):c.604G>T(p.Glu202*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,456,652 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: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

TREM2
NM_001271821.2 stop_gained

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.948

Publications

0 publications found

Variant links:

Genes affected

TREM2 (HGNC:17761): (triggering receptor expressed on myeloid cells 2) This gene encodes a membrane protein that forms a receptor signaling complex with the TYRO protein tyrosine kinase binding protein. The encoded protein functions in immune response and may be involved in chronic inflammation by triggering the production of constitutive inflammatory cytokines. Defects in this gene are a cause of polycystic lipomembranous osteodysplasia with sclerosing leukoencephalopathy (PLOSL). Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Nov 2012]

TREM2 Gene-Disease associations (from GenCC):

polycystic lipomembranous osteodysplasia with sclerosing leukoencephalopathy 2
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), PanelApp Australia, Ambry Genetics
polycystic lipomembranous osteodysplasia with sclerosing leukoencephaly
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

TREM2 links:

ENSG00000290034 (HGNC:):

ENSG00000290034 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.0848 CDS is truncated, and there are 0 pathogenic variants in the truncated region.

PM2

Very rare variant in population databases, with high coverage;

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001271821.2. 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
	TREM2	NM_018965.4	MANE Select	c.*105G>T		3_prime_UTR	Exon 5 of 5	NP_061838.1	Q5TCX1
	TREM2	NM_001271821.2		c.604G>T	p.Glu202*	stop_gained	Exon 4 of 4	NP_001258750.1	Q9NZC2-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TREM2	ENST00000338469.3	TSL:1	c.604G>T	p.Glu202*	stop_gained	Exon 4 of 4	ENSP00000342651.4	Q9NZC2-2
TREM2	ENST00000373113.8	TSL:1 MANE Select	c.*105G>T		3_prime_UTR	Exon 5 of 5	ENSP00000362205.3	Q9NZC2-1
TREM2	ENST00000373122.8	TSL:1	c.*169G>T		3_prime_UTR	Exon 5 of 5	ENSP00000362214.4	Q9NZC2-3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1456652

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

723970

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33426

American (AMR)

AF:

0.00

AC:

AN:

43802

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25960

East Asian (EAS)

AF:

0.00

AC:

AN:

39568

South Asian (SAS)

AF:

0.00

AC:

AN:

85326

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53160

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1109424

Other (OTH)

AF:

0.00

AC:

AN:

60228

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.675

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.40

BayesDel_noAF

Benign

-0.82

CADD

Benign

7.7

(source)

DANN

Benign

0.96

Eigen

Benign

-0.57

Eigen_PC

Benign

-0.70

FATHMM_MKL

Benign

0.043

PhyloP100

0.95

Vest4

0.11

GERP RS

2.4

Mutation Taster

=183/17

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over