11-118344439-G-C

Variant names:

• chr11-118344439-G-C
• rs1481255896
• NM_000073.3:c.16G>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_000073.3(CD3G):​c.16G>C​(p.Gly6Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 17/22 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)
• Consequence: CD3G NM_000073.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.182
• Publications: 1 publications found

Genes affected

CD3G (HGNC:1675): (CD3 gamma subunit of T-cell receptor complex) The protein encoded by this gene is the CD3-gamma polypeptide, which together with CD3-epsilon, -delta and -zeta, and the T-cell receptor alpha/beta and gamma/delta heterodimers, forms the T-cell receptor-CD3 complex. This complex plays an important role in coupling antigen recognition to several intracellular signal-transduction pathways. The genes encoding the epsilon, gamma and delta polypeptides are located in the same cluster on chromosome 11. Defects in this gene are associated with T cell immunodeficiency. [provided by RefSeq, Jul 2008]

CD3G Gene-Disease associations (from GenCC):

• combined immunodeficiency due to CD3gamma deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.048751414).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CD3G	NM_000073.3	c.16G>C	p.Gly6Arg	missense_variant	Exon 1 of 7	ENST00000532917.3	NP_000064.1
CD3G	NM_001440319.1	c.16G>C	p.Gly6Arg	missense_variant	Exon 1 of 7		NP_001427248.1
CD3G	XM_005271724.5	c.16G>C	p.Gly6Arg	missense_variant	Exon 1 of 4		XP_005271781.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CD3G	ENST00000532917.3	c.16G>C	p.Gly6Arg	missense_variant	Exon 1 of 7	1	NM_000073.3	ENSP00000431445.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Combined immunodeficiency due to CD3gamma deficiency Uncertain:1

Jun 05, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glycine with arginine at codon 6 of the CD3G protein (p.Gly6Arg). The glycine residue is weakly conserved and there is a moderate physicochemical difference between glycine and arginine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with CD3G-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The arginine amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	10
DANN	Benign	0.92
DEOGEN2	Benign	0.10	T
Eigen	Benign	-0.52
Eigen_PC	Benign	-0.47
FATHMM_MKL	Benign	0.036	N
LIST_S2	Benign	0.69	T
M_CAP	Benign	0.019	T
MetaRNN	Benign	0.049	T
MetaSVM	Benign	-0.84	T
MutationAssessor	Benign	1.3	L
PhyloP100		0.18
PrimateAI	Benign	0.23	T
PROVEAN	Benign	-0.41	N
REVEL	Benign	0.13
Sift	Benign	0.35	T
Sift4G	Benign	0.35	T
Polyphen		0.012	B
Vest4		0.16
MutPred		0.35		Loss of catalytic residue at G6 (P = 0.0141);
MVP		0.59
MPC		0.41
ClinPred		0.11	T
GERP RS		0.96
PromoterAI		-0.012	Neutral
Varity_R		0.053
gMVP		0.52
Mutation Taster		=84/16	polymorphism

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

Other links and lift over

dbSNP: rs1481255896; hg19: chr11-118215154;