Genetic Variant CD300LF:p.Arg79Pro (chr17-74704624-C-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_139018.5(CD300LF):c.236G>C(p.Arg79Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000954 in 1,614,168 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R79W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00010 ( 0 hom. )

Consequence

CD300LF
NM_139018.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.0900

Variant links:

Genes affected

CD300LF (HGNC:29883): (CD300 molecule like family member f) This gene encodes a member of the CD300 protein family. Members of this family are cell surface glycoproteins with a single IgV-like extracellular domain, and are involved in the regulation of immune response. The encoded protein is an inhibitory receptor. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2014]

CD300LF links:

RAB37 (HGNC:30268): (RAB37, member RAS oncogene family) Rab proteins are low molecular mass GTPases that are critical regulators of vesicle trafficking. For additional background information on Rab proteins, see MIM 179508.[supplied by OMIM, Apr 2006]

RAB37 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CD300LF	NM_139018.5 link	c.236G>C	p.Arg79Pro	missense_variant	Exon 2 of 7	ENST00000326165.11	NP_620587.2	Q8TDQ1-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CD300LF	ENST00000326165.11 link	c.236G>C	p.Arg79Pro	missense_variant	Exon 2 of 7	1	NM_139018.5	ENSP00000327075.6		Q8TDQ1-1

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152158

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000118

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

251494

Hom.:

AF XY:

0.0000368

AC XY:

AN XY:

135922

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000439

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000999

AC:

146

AN:

1461892

Hom.:

Cov.:

AF XY:

0.0000990

AC XY:

AN XY:

727246

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000124

Gnomad4 OTH exome

AF:

0.0000828

GnomAD4 genome

AF:

0.0000525

AC:

AN:

152276

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74460

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000118

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000838

Hom.:

Bravo

AF:

0.0000529

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000778

AC:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 26, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.236G>C (p.R79P) alteration is located in exon 2 (coding exon 2) of the CD300LF gene. This alteration results from a G to C substitution at nucleotide position 236, causing the arginine (R) at amino acid position 79 to be replaced by a proline (P). 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

Pathogenic

0.78

BayesDel_addAF

Benign

-0.11

BayesDel_noAF

Benign

-0.22

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.69

.;.;D;.;.;T;.;.

Eigen

Benign

-0.011

Eigen_PC

Benign

-0.28

FATHMM_MKL

Benign

0.086

LIST_S2

Uncertain

0.94

D;D;D;.;D;D;D;.

M_CAP

Benign

0.021

MetaRNN

Uncertain

0.51

D;D;D;D;D;D;D;D

MetaSVM

Benign

-1.1

MutationAssessor

Pathogenic

3.7

.;.;H;.;H;.;.;.

PrimateAI

Benign

0.24

PROVEAN

Pathogenic

-6.3

D;D;D;.;D;.;.;.

REVEL

Benign

0.19

Sift

Uncertain

0.0080

D;D;D;.;D;.;.;.

Sift4G

Uncertain

0.053

T;D;D;T;D;D;D;D

Polyphen

1.0

D;D;D;D;D;.;D;D

Vest4

0.51

MVP

0.43

MPC

0.61

ClinPred

0.76

GERP RS

2.3

Varity_R

0.77

gMVP

0.95

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