rs28937876

chr6-41158991-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_018965.4(TREM2):c.558G>T(p.Lys186Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TREM2 NM_018965.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1
• Conservation: PhyloP100: 0.668

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]

(HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TREM2	NM_018965.4	c.558G>T	p.Lys186Asn	missense_variant	4/5	ENST00000373113.8
TREM2	NM_001271821.2	c.483-211G>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TREM2	ENST00000373113.8	c.558G>T	p.Lys186Asn	missense_variant	4/5	1	NM_018965.4	P1
TREM2	ENST00000373122.8	c.598G>T	p.Asp200Tyr	missense_variant	4/5	1
TREM2	ENST00000338469.3	c.483-211G>T		intron_variant		1
	ENST00000702590.1	n.364+3428C>A		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Polycystic lipomembranous osteodysplasia with sclerosing leukoencephalopathy 2 Pathogenic:1 Uncertain:1

Pathogenic, no assertion criteria provided	literature only	OMIM	Sep 01, 2002	- -
Uncertain significance, criteria provided, single submitter	curation	SIB Swiss Institute of Bioinformatics	Oct 17, 2019	This variant is interpreted as a variant of uncertain significance for Polycystic lipomembranous osteodysplasia with sclerosing leukoencephalopathy 2 , autosomal recessive. The following ACMG Tag(s) were applied: PM2, PP3, PP1, PM3-Supporting. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.84
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.34
Cadd	Pathogenic	32
Dann	Uncertain	1.0
Eigen	Benign	0.18
Eigen_PC	Benign	0.051
FATHMM_MKL	Benign	0.60	D
LIST_S2	Benign	0.42	T
M_CAP	Benign	0.026	D
MetaRNN	Uncertain	0.71	D
MutationTaster	Benign	0.017	A;A;A
Sift4G	Benign	0.11	T
Polyphen		0.26	B
Vest4		0.67
MVP		0.31
ClinPred		0.91	D
GERP RS		0.92

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.58		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.58		Position offset: -8

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

Publications

LitVar

Other links and lift over

dbSNP: rs28937876; hg19: chr6-41126729;