12-111446815-G-A

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_005475.3(SH2B3):c.795G>A(p.Arg265=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000332 in 1,582,514 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0019 (0 hom., cov: 31)
  • Exomes 𝑓: 0.00016 (1 hom.)
• Consequence: SH2B3 NM_005475.3 synonymous
• Clinical Significance: Benign criteria provided, single submitter B:2
• Conservation: PhyloP100: 0.128

Genes affected

SH2B3 (HGNC:29605): (SH2B adaptor protein 3) This gene encodes a member of the SH2B adaptor family of proteins, which are involved in a range of signaling activities by growth factor and cytokine receptors. The encoded protein is a key negative regulator of cytokine signaling and plays a critical role in hematopoiesis. Mutations in this gene have been associated with susceptibility to celiac disease type 13 and susceptibility to insulin-dependent diabetes mellitus. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2014]

ATXN2 (HGNC:10555): (ataxin 2) This gene belongs to a group of genes that is associated with microsatellite-expansion diseases, a class of neurological and neuromuscular disorders caused by expansion of short stretches of repetitive DNA. The protein encoded by this gene has two globular domains near the N-terminus, one of which contains a clathrin-mediated trans-Golgi signal and an endoplasmic reticulum exit signal. The encoded cytoplasmic protein localizes to the endoplasmic reticulum and plasma membrane, is involved in endocytosis, and modulates mTOR signals, modifying ribosomal translation and mitochondrial function. The N-terminal region of the protein contains a polyglutamine tract of 14-31 residues that can be expanded in the pathogenic state to 32-200 residues. Intermediate length expansions of this tract increase susceptibility to amyotrophic lateral sclerosis, while long expansions of this tract result in spinocerebellar ataxia-2, an autosomal-dominantly inherited, neurodegenerative disorder. Genome-wide association studies indicate that loss-of-function mutations in this gene may be associated with susceptibility to type I diabetes, obesity and hypertension. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2016]

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.58).
• BP6: Variant 12-111446815-G-A is Benign according to our data. Variant chr12-111446815-G-A is described in ClinVar as [Benign]. Clinvar id is 733920.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=0.128 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SH2B3	NM_005475.3	c.795G>A	p.Arg265=	synonymous_variant	3/8	ENST00000341259.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SH2B3	ENST00000341259.7	c.795G>A	p.Arg265=	synonymous_variant	3/8	1	NM_005475.3	P1
SH2B3	ENST00000538307.1	c.189G>A	p.Arg63=	synonymous_variant	2/7	2
ATXN2	ENST00000642389.2	c.*171-2628C>T		intron_variant, NMD_transcript_variant

Frequencies

GnomAD3 genomes AF: 0.00189 AC: 288 AN: 152144 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00676

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000458

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.000464 AC: 106 AN: 228416 Hom.: 1 AF XY: 0.000337 AC XY: 41 AN XY: 121824

Gnomad AFR exome AF: 0.00606

Gnomad AMR exome AF: 0.000242

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000969

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000162 AC: 231 AN: 1430252 Hom.: 1 Cov.: 33 AF XY: 0.000150 AC XY: 106 AN XY: 706876

Gnomad4 AFR exome AF: 0.00596

Gnomad4 AMR exome AF: 0.000301

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: 9.15e-7

Gnomad4 OTH exome AF: 0.000305

GnomAD4 genome AF: 0.00194 AC: 295 AN: 152262 Hom.: 0 Cov.: 31 AF XY: 0.00187 AC XY: 139 AN XY: 74442

Gnomad4 AFR AF: 0.00691

Gnomad4 AMR AF: 0.000458

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.00165 Hom.: 0

Bravo AF: 0.00207

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Benign:1

Benign, no assertion criteria provided

clinical testing

Genetic Services Laboratory, University of Chicago

Sep 23, 2022

- -

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Oct 17, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.58
Cadd	Benign	4.0
Dann	Benign	0.47
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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: rs143256866; hg19: chr12-111884619;