14-22455202-G-T

Variant names:

• chr14-22455202-G-T
• rs2242545

Variant summary

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

The variant allele was found at a frequency of 0.0000163 in 611,952 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 25)
  • Exomes 𝑓: 0.000016 (0 hom.)
• Consequence: TRA intragenic
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.50
• Publications: 5 publications found

Genes affected

TRA (HGNC:12027):

TRD (HGNC:12252):

TRD-AS1 (HGNC:56197): (TRD antisense RNA 1)

TRDJ4 (HGNC:12260): (T cell receptor delta joining 4) T cell receptors recognize foreign antigens which have been processed as small peptides and bound to major histocompatibility complex (MHC) molecules at the surface of antigen presenting cells (APC). Each T cell receptor is a dimer consisting of one alpha and one beta chain or one delta and one gamma chain. In a single cell, the T cell receptor loci are rearranged and expressed in the order delta, gamma, beta, and alpha. If both delta and gamma rearrangements produce functional chains, the cell expresses delta and gamma. If not, the cell proceeds to rearrange the beta and alpha loci. This region represents the germline organization of the T cell receptor alpha and delta loci. Both the alpha and delta loci include V (variable), J (joining), and C (constant) segments and the delta locus also includes diversity (D) segments. The delta locus is situated within the alpha locus, between the alpha V and J segments. During T cell development, the delta chain is synthesized by a recombination event at the DNA level joining a D segment with a J segment; a V segment is then joined to the D-J gene. The alpha chain is synthesized by recombination joining a single V segment with a J segment. For both chains, the C segment is later joined by splicing at the RNA level. Recombination of many different V segments with several J segments provides a wide range of antigen recognition. Additional diversity is attained by junctional diversity, resulting from the random additional of nucleotides by terminal deoxynucleotidyltransferase. Five variable segments can be used in either alpha or delta chains and are described by TRAV/DV symbols. Several V and J segments of the alpha locus are known to be incapable of encoding a protein and are considered pseudogenes. [provided by RefSeq, Aug 2016]

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 (BayesDel_noAF=-0.91).

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000514473.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TRD-AS1	NR_148361.1		n.225+26039C>A		intron	N/A

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TRD-AS1	ENST00000514473.2	TSL:2	n.225+26039C>A		intron	N/A
	TRDJ4	ENST00000390474.1	TSL:6	c.-49G>T		upstream_gene	N/A	ENSP00000452040.1

Frequencies

GnomAD3 genomes Cov.: 25

GnomAD2 exomes AF: 0.0000216 AC: 5 AN: 231592 AF XY: 0.0000395

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000163 AC: 10 AN: 611952 Hom.: 0 Cov.: 0 AF XY: 0.0000239 AC XY: 8 AN XY: 334492

African (AFR) AF: 0.00 AC: 0 AN: 17602

American (AMR) AF: 0.00 AC: 0 AN: 43462

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 20908

East Asian (EAS) AF: 0.00 AC: 0 AN: 36014

South Asian (SAS) AF: 0.000144 AC: 10 AN: 69582

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 38706

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4132

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 348700

Other (OTH) AF: 0.00 AC: 0 AN: 32846

GnomAD4 genome Cov.: 25

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	0.0050
DANN	Benign	0.43
PhyloP100		-1.5

Splicing

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

Other links and lift over

dbSNP: rs2242545; hg19: chr14-22924194;