Genetic Variant CD300LB:p.Glu180Val (chr17-74522805-T-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_174892.4(CD300LB):c.539A>T(p.Glu180Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000547 in 1,461,876 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

CD300LB
NM_174892.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.0440

Variant links:

Genes affected

CD300LB (HGNC:30811): (CD300 molecule like family member b) CD300LB is a nonclassical activating receptor of the immunoglobulin (Ig) superfamily expressed on myeloid cells (Martinez-Barriocanal and Sayos, 2006 [PubMed 16920917]).[supplied by OMIM, Mar 2008]

CD300LB links:

LOC107985074 (HGNC:):

LOC107985074 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.060144097).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CD300LB	NM_174892.4 link	c.539A>T	p.Glu180Val	missense_variant	Exon 4 of 4	ENST00000392621.6	NP_777552.3	A8K4G0
CD300LB	XM_005257027.4 link	c.554+774A>T		intron_variant	Intron 3 of 3		XP_005257084.1
LOC107985074	XR_007065902.1 link	n.352+1423T>A		intron_variant	Intron 1 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CD300LB	ENST00000392621.6 link	c.539A>T	p.Glu180Val	missense_variant	Exon 4 of 4	1	NM_174892.4	ENSP00000376397.2		A8K4G0

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

251460

Hom.:

AF XY:

0.0000294

AC XY:

AN XY:

135902

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000326

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000547

AC:

AN:

1461876

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000202

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 22, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.650A>T (p.E217V) alteration is located in exon 4 (coding exon 4) of the CD300LB gene. This alteration results from a A to T substitution at nucleotide position 650, causing the glutamic acid (E) at amino acid position 217 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.39

BayesDel_noAF

Benign

-0.49

CADD

Benign

7.9

DANN

Uncertain

0.97

DEOGEN2

Benign

0.20

Eigen

Benign

-0.79

Eigen_PC

Benign

-0.98

FATHMM_MKL

Benign

0.033

LIST_S2

Benign

0.39

M_CAP

Benign

0.0035

MetaRNN

Benign

0.060

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.5

PrimateAI

Benign

0.21

PROVEAN

Uncertain

-2.4

REVEL

Benign

0.039

Sift

Uncertain

0.0070

Sift4G

Uncertain

0.045

Polyphen

0.65

Vest4

0.10

MutPred

0.26

Loss of disorder (P = 0.0186);

MVP

0.22

MPC

0.35

ClinPred

0.37

GERP RS

-3.6

Varity_R

0.13

gMVP

0.28

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