11-118344434-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_000073.3(CD3G):c.11G>T(p.Gly4Val) 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. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. G4G) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CD3G NM_000073.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.433

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 Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.30450383).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CD3G	NM_000073.3	c.11G>T	p.Gly4Val	missense_variant	1/7	ENST00000532917.3
CD3G	XM_005271724.5	c.11G>T	p.Gly4Val	missense_variant	1/4
CD3G	XM_006718941.4	c.11G>T	p.Gly4Val	missense_variant	1/7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CD3G	ENST00000532917.3	c.11G>T	p.Gly4Val	missense_variant	1/7	1	NM_000073.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1418948 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 701432

Gnomad4 AFR exome AF: 0.00

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 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

Apr 09, 2019

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 sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site, but this prediction has not been confirmed by published transcriptional studies. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). 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 valine at codon 4 of the CD3G protein (p.Gly4Val). The glycine residue is weakly conserved and there is a moderate physicochemical difference between glycine and valine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Benign	0.0049	T
BayesDel_noAF	Benign	-0.23
Cadd	Benign	17
Dann	Benign	0.93
DEOGEN2	Uncertain	0.58	D
Eigen	Uncertain	0.19
Eigen_PC	Benign	0.14
FATHMM_MKL	Benign	0.41	N
LIST_S2	Benign	0.67	T
M_CAP	Benign	0.032	D
MetaRNN	Benign	0.30	T
MetaSVM	Benign	-0.85	T
MutationAssessor	Uncertain	2.3	M
MutationTaster	Benign	0.61	D;D
PrimateAI	Benign	0.30	T
PROVEAN	Uncertain	-3.4	D
REVEL	Benign	0.21
Sift	Benign	0.065	T
Sift4G	Benign	0.48	T
Polyphen		0.93	P
Vest4		0.26
MutPred		0.23		Loss of disorder (P = 0.049);
MVP		0.79
MPC		1.2
ClinPred		0.87	D
GERP RS		3.6
Varity_R		0.20
gMVP		0.57

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs1483357286; hg19: chr11-118215149;