chr3-158100311-C-T

Variant names:

• chr3-158100311-C-T
• rs1380735730
• NM_001163678.2:c.556G>A

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001163678.2(SHOX2):​c.556G>A​(p.Val186Ile) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000485 in 1,444,414 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000048 (0 hom.)
• Consequence: SHOX2 NM_001163678.2 missense, splice_region
• Scores: Splicing: ADA: 0.9997
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.42
• Publications: 0 publications found

Genes affected

SHOX2 (HGNC:10854): (SHOX homeobox 2) This gene is a member of the homeobox family of genes that encode proteins containing a 60-amino acid residue motif that represents a DNA binding domain. Homeobox genes have been characterized extensively as transcriptional regulators involved in pattern formation in both invertebrate and vertebrate species. Several human genetic disorders are caused by aberrations in human homeobox genes. This locus represents a pseudoautosomal homeobox gene that is thought to be responsible for idiopathic short stature, and it is implicated in the short stature phenotype of Turner syndrome patients. This gene is considered to be a candidate gene for Cornelia de Lange syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2009]

SHOX2 Gene-Disease associations (from GenCC):

• schizophrenia

  Inheritance: Unknown Classification: NO_KNOWN Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SHOX2	NM_001163678.2	c.556G>A	p.Val186Ile	missense_variant, splice_region_variant	Exon 3 of 5	ENST00000483851.7	NP_001157150.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SHOX2	ENST00000483851.7	c.556G>A	p.Val186Ile	missense_variant, splice_region_variant	Exon 3 of 5	2	NM_001163678.2	ENSP00000419362.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000485 AC: 7 AN: 1444414 Hom.: 0 Cov.: 29 AF XY: 0.00000418 AC XY: 3 AN XY: 718142

African (AFR) AF: 0.00 AC: 0 AN: 32396

American (AMR) AF: 0.00 AC: 0 AN: 40192

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25430

East Asian (EAS) AF: 0.00 AC: 0 AN: 39394

South Asian (SAS) AF: 0.00 AC: 0 AN: 81578

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53078

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5578

European-Non Finnish (NFE) AF: 0.00000632 AC: 7 AN: 1107098

Other (OTH) AF: 0.00 AC: 0 AN: 59670

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Mar 24, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.628G>A (p.V210I) alteration is located in exon 4 (coding exon 4) of the SHOX2 gene. This alteration results from a G to A substitution at nucleotide position 628, causing the valine (V) at amino acid position 210 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.32	D
BayesDel_noAF	Pathogenic	0.22
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.56	D;.;.;.
Eigen	Pathogenic	0.76
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.91	D;D;D;D
M_CAP	Pathogenic	0.40	D
MetaRNN	Pathogenic	0.75	D;D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Benign	0.92	L;.;.;L
PhyloP100		7.4
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-1.0	.;.;.;N
REVEL	Pathogenic	0.68
Sift	Pathogenic	0.0	.;.;.;D
Sift4G	Uncertain	0.0060	D;D;D;D
Polyphen		1.0	D;.;D;D
Vest4		0.56
MutPred		0.79		Loss of helix (P = 0.1299);.;.;Loss of helix (P = 0.1299);
MVP		0.98
MPC		1.4
ClinPred		0.96	D
GERP RS		5.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.31
gMVP		0.47
Mutation Taster		=29/71	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.93
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs1380735730; hg19: chr3-157818100;