2-203866796-C-T

Position:

• chr2-203866796-C-T

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The ENST00000696479.1(CTLA4):​c.48-1122C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.162 in 152,102 control chromosomes in the GnomAD database, including 2,049 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency: Genomes: 𝑓 0.16 (2049 hom., cov: 31)
• Consequence: CTLA4 ENST00000696479.1 intron
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.628

Genes affected

CTLA4 (HGNC:2505): (cytotoxic T-lymphocyte associated protein 4) This gene is a member of the immunoglobulin superfamily and encodes a protein which transmits an inhibitory signal to T cells. The protein contains a V domain, a transmembrane domain, and a cytoplasmic tail. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. The membrane-bound isoform functions as a homodimer interconnected by a disulfide bond, while the soluble isoform functions as a monomer. Mutations in this gene have been associated with insulin-dependent diabetes mellitus, Graves disease, Hashimoto thyroiditis, celiac disease, systemic lupus erythematosus, thyroid-associated orbitopathy, and other autoimmune diseases. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.86).
• BP6: Variant 2-203866796-C-T is Benign according to our data. Variant chr2-203866796-C-T is described in ClinVar as [Benign]. Clinvar id is 1166995.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.172 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CTLA4	ENST00000696479.1	c.48-1122C>T		intron_variant

Frequencies

GnomAD3 genomes AF: 0.162 AC: 24562 AN: 151984 Hom.: 2044 Cov.: 31

Gnomad AFR AF: 0.165

Gnomad AMI AF: 0.149

Gnomad AMR AF: 0.145

Gnomad ASJ AF: 0.174

Gnomad EAS AF: 0.112

Gnomad SAS AF: 0.0717

Gnomad FIN AF: 0.153

Gnomad MID AF: 0.171

Gnomad NFE AF: 0.174

Gnomad OTH AF: 0.164

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.162 AC: 24576 AN: 152102 Hom.: 2049 Cov.: 31 AF XY: 0.159 AC XY: 11812 AN XY: 74354

Gnomad4 AFR AF: 0.165

Gnomad4 AMR AF: 0.144

Gnomad4 ASJ AF: 0.174

Gnomad4 EAS AF: 0.112

Gnomad4 SAS AF: 0.0715

Gnomad4 FIN AF: 0.153

Gnomad4 NFE AF: 0.174

Gnomad4 OTH AF: 0.163

Alfa AF: 0.166 Hom.: 854

Bravo AF: 0.162

Asia WGS AF: 0.0860 AC: 302 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Autoimmune lymphoproliferative syndrome due to CTLA4 haploinsufficiency Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 19, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.86
CADD	Benign	2.3
DANN	Benign	0.44

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs16840252; hg19: chr2-204731519;