chr12-111446485-G-C

Position:

• chr12-111446485-G-C

Variant summary

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

The NM_005475.3(SH2B3):​c.733-268G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.103 in 152,260 control chromosomes in the GnomAD database, including 2,709 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency: Genomes: 𝑓 0.10 (2709 hom., cov: 33)
• Consequence: SH2B3 NM_005475.3 intron
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.797

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 Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BP6: Variant 12-111446485-G-C is Benign according to our data. Variant chr12-111446485-G-C is described in ClinVar as [Benign]. Clinvar id is 1246850.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.352 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SH2B3	NM_005475.3	c.733-268G>C		intron_variant		ENST00000341259.7	NP_005466.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SH2B3	ENST00000341259.7	c.733-268G>C		intron_variant		1	NM_005475.3	ENSP00000345492.2
SH2B3	ENST00000538307.1	c.127-268G>C		intron_variant		2		ENSP00000440597.1
ATXN2	ENST00000642389.2	n.*171-2298C>G		intron_variant				ENSP00000496055.2

Frequencies

GnomAD3 genomes AF: 0.103 AC: 15656 AN: 152144 Hom.: 2689 Cov.: 33

Gnomad AFR AF: 0.356

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0419

Gnomad ASJ AF: 0.00317

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00373

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0285

Gnomad NFE AF: 0.00170

Gnomad OTH AF: 0.0665

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

GnomAD4 genome AF: 0.103 AC: 15722 AN: 152260 Hom.: 2709 Cov.: 33 AF XY: 0.0991 AC XY: 7376 AN XY: 74450

Gnomad4 AFR AF: 0.356

Gnomad4 AMR AF: 0.0418

Gnomad4 ASJ AF: 0.00317

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00352

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00171

Gnomad4 OTH AF: 0.0659

Alfa AF: 0.0804 Hom.: 204

Bravo AF: 0.118

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Jan 10, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	0.21
DANN	Benign	0.44

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: rs73410513; hg19: chr12-111884289;