X-124346569-T-A

Position:

• chrX-124346569-T-A

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_Strong BP6_Very_Strong BS2

The NM_002351.5(SH2D1A):​c.-74T>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000684 in 1,146,915 control chromosomes in the GnomAD database, including 1 homozygotes. There are 277 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.00067 (0 hom., 33 hem., cov: 23)
  • Exomes 𝑓: 0.00069 (1 hom. 244 hem.)
• Consequence: SH2D1A NM_002351.5 5_prime_UTR
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.114

Genes affected

SH2D1A (HGNC:10820): (SH2 domain containing 1A) This gene encodes a protein that plays a major role in the bidirectional stimulation of T and B cells. This protein contains an SH2 domain and a short tail. It associates with the signaling lymphocyte-activation molecule, thereby acting as an inhibitor of this transmembrane protein by blocking the recruitment of the SH2-domain-containing signal-transduction molecule SHP-2 to its docking site. This protein can also bind to other related surface molecules that are expressed on activated T, B and NK cells, thereby modifying signal transduction pathways in these cells. Mutations in this gene cause lymphoproliferative syndrome X-linked type 1 or Duncan disease, a rare immunodeficiency characterized by extreme susceptibility to infection with Epstein-Barr virus, with symptoms including severe mononucleosis and malignant lymphoma. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

STAG2 (HGNC:11355): (STAG2 cohesin complex component) The protein encoded by this gene is a subunit of the cohesin complex, which regulates the separation of sister chromatids during cell division. Targeted inactivation of this gene results in chromatid cohesion defects and aneuploidy, suggesting that genetic disruption of cohesin is a cause of aneuploidy in human cancer. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2013]

ACMG classification

Verdict is Benign. Variant got -16 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).
• BP6: Variant X-124346569-T-A is Benign according to our data. Variant chrX-124346569-T-A is described in ClinVar as [Likely_benign]. Clinvar id is 367870.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS2: High Hemizygotes in GnomAd4 at 33 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SH2D1A	NM_002351.5	c.-74T>A		5_prime_UTR_variant	1/4	ENST00000371139.9
SH2D1A	NM_001114937.3	c.-74T>A		5_prime_UTR_variant	1/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SH2D1A	ENST00000371139.9	c.-74T>A		5_prime_UTR_variant	1/4	1	NM_002351.5	P3

Frequencies

GnomAD3 genomes AF: 0.000675 AC: 76 AN: 112603 Hom.: 0 Cov.: 23 AF XY: 0.000950 AC XY: 33 AN XY: 34751

Gnomad AFR AF: 0.000194

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00197

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00325

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00417

Gnomad NFE AF: 0.000713

Gnomad OTH AF: 0.000660

GnomAD4 exome AF: 0.000686 AC: 709 AN: 1034258 Hom.: 1 Cov.: 20 AF XY: 0.000774 AC XY: 244 AN XY: 315122

Gnomad4 AFR exome AF: 0.000119

Gnomad4 AMR exome AF: 0.000684

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00179

Gnomad4 FIN exome AF: 0.0000253

Gnomad4 NFE exome AF: 0.000622

Gnomad4 OTH exome AF: 0.000976

GnomAD4 genome AF: 0.000675 AC: 76 AN: 112657 Hom.: 0 Cov.: 23 AF XY: 0.000948 AC XY: 33 AN XY: 34815

Gnomad4 AFR AF: 0.000193

Gnomad4 AMR AF: 0.00197

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00326

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000713

Gnomad4 OTH AF: 0.000652

Alfa AF: 0.000645 Hom.: 5

Bravo AF: 0.000510

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

X-linked lymphoproliferative disease due to SH2D1A deficiency Benign:2

Likely benign, criteria provided, single submitter	clinical testing	KCCC/NGS Laboratory, Kuwait Cancer Control Center	Jul 07, 2023	- -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	5.7
DANN	Benign	0.82

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

LitVar

Other links and lift over

dbSNP: rs142160401; hg19: chrX-123480419;