11-118344439-G-C

Variant summary

Our verdict is Likely benign. Variant got -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. 16/21 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

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]

ACMG classification

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=0.048751414).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CD3G	NM_000073.3	c.16G>C	p.Gly6Arg	missense_variant	1/7	ENST00000532917.3
CD3G	XM_005271724.5	c.16G>C	p.Gly6Arg	missense_variant	1/4
CD3G	XM_006718941.4	c.16G>C	p.Gly6Arg	missense_variant	1/7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CD3G	ENST00000532917.3	c.16G>C	p.Gly6Arg	missense_variant	1/7	1	NM_000073.3	P1

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

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jun 05, 2021

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. 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. This variant has not been reported in the literature in individuals with CD3G-related conditions. This variant is not present in population databases (ExAC no frequency). 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. -

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
MutationTaster	Benign	1.0	D;N
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
Varity_R		0.053
gMVP		0.52

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr11-118215154;