Genetic Variant SPON1:p.Arg99Gly (chr11-13982903-A-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_006108.4(SPON1):c.295A>G(p.Arg99Gly) variant causes a missense change. The variant allele was found at a frequency of 0.0000135 in 1,407,566 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.000013 ( 0 hom. )

Consequence

SPON1
NM_006108.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.19

Variant links:

Genes affected

SPON1 (HGNC:11252): (spondin 1) Predicted to be an extracellular matrix structural constituent. Predicted to be involved in cell adhesion. Predicted to act upstream of or within positive regulation of protein binding activity; positive regulation of protein processing; and regulation of amyloid precursor protein catabolic process. Located in extracellular space. Colocalizes with collagen-containing extracellular matrix. [provided by Alliance of Genome Resources, Apr 2022]

SPON1 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.19520986).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SPON1	NM_006108.4 link	c.295A>G	p.Arg99Gly	missense_variant	Exon 2 of 16	ENST00000576479.4	NP_006099.2	Q9HCB6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SPON1	ENST00000576479.4 link	c.295A>G	p.Arg99Gly	missense_variant	Exon 2 of 16	1	NM_006108.4	ENSP00000460236.1		Q9HCB6

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000584

AC:

AN:

171248

Hom.:

AF XY:

0.00

AC XY:

AN XY:

90060

show subpopulations

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000211

GnomAD4 exome

AF:

0.0000135

AC:

AN:

1407566

Hom.:

Cov.:

AF XY:

0.0000101

AC XY:

AN XY:

694938

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000126

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000277

Gnomad4 OTH exome

AF:

0.000103

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000312

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000175

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Sep 12, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.295A>G (p.R99G) alteration is located in exon 2 (coding exon 2) of the SPON1 gene. This alteration results from a A to G substitution at nucleotide position 295, causing the arginine (R) at amino acid position 99 to be replaced by a glycine (G). 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

Benign

0.32

BayesDel_addAF

Benign

-0.055

BayesDel_noAF

Benign

-0.32

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.087

Eigen

Benign

-0.12

Eigen_PC

Benign

0.12

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.88

MetaRNN

Benign

0.20

MetaSVM

Benign

-0.95

MutationAssessor

Benign

1.2

PrimateAI

Uncertain

0.74

Sift4G

Benign

0.066

Polyphen

0.028

Vest4

0.28

MVP

0.24

ClinPred

0.82

GERP RS

5.3

Varity_R

0.70

gMVP

0.66

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over