Genetic Variant CD40LG:p.Leu17Met (chrX-136648297-C-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1PM2BP4_Moderate

The NM_000074.3(CD40LG):c.49C>A(p.Leu17Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000167 in 1,198,222 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000090 ( 0 hom., 0 hem., cov: 22)

Exomes 𝑓: 9.2e-7 ( 0 hom. 1 hem. )

Consequence

CD40LG
NM_000074.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.945

Variant links:

Genes affected

CD40LG (HGNC:11935): (CD40 ligand) The protein encoded by this gene is expressed on the surface of T cells. It regulates B cell function by engaging CD40 on the B cell surface. A defect in this gene results in an inability to undergo immunoglobulin class switch and is associated with hyper-IgM syndrome. [provided by RefSeq, Jul 2008]

CD40LG links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM1

In a chain CD40 ligand, membrane form (size 260) in uniprot entity CD40L_HUMAN there are 19 pathogenic changes around while only 0 benign (100%) in NM_000074.3

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.15060875).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CD40LG	NM_000074.3 link	c.49C>A	p.Leu17Met	missense_variant	Exon 1 of 5	ENST00000370629.7	NP_000065.1	P29965

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CD40LG	ENST00000370629.7 link	c.49C>A	p.Leu17Met	missense_variant	Exon 1 of 5	1	NM_000074.3	ENSP00000359663.2		P29965

Frequencies

GnomAD3 genomes

AF:

0.00000895

AC:

AN:

111674

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33830

show subpopulations

Gnomad AFR

AF:

0.0000325

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

9.20e-7

AC:

AN:

1086548

Hom.:

Cov.:

AF XY:

0.00000284

AC XY:

AN XY:

352450

show subpopulations

Gnomad4 AFR exome

AF:

0.0000382

Gnomad4 AMR exome

AF:

0.00

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000895

AC:

AN:

111674

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33830

show subpopulations

Gnomad4 AFR

AF:

0.0000325

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:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000113

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.22

BayesDel_noAF

Benign

-0.55

CADD

Benign

7.8

DANN

Uncertain

0.98

DEOGEN2

Benign

0.36

T;T

FATHMM_MKL

Benign

0.11

LIST_S2

Benign

0.60

T;T

M_CAP

Pathogenic

0.36

MetaRNN

Benign

0.15

T;T

MetaSVM

Benign

-0.85

MutationAssessor

Benign

1.1

L;.

PrimateAI

Benign

0.29

PROVEAN

Benign

0.010

N;N

REVEL

Benign

0.13

Sift

Benign

0.057

T;T

Sift4G

Benign

0.10

T;T

Polyphen

0.53

P;B

Vest4

0.15

MutPred

0.18

Gain of disorder (P = 0.0503);Gain of disorder (P = 0.0503);

MVP

0.65

MPC

0.51

ClinPred

0.11

GERP RS

3.1

Varity_R

0.18

gMVP

0.51

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

Computational scores

Splicing

Publications

LitVar

Other links and lift over