chr14-69952261-C-T

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_001034852.3(SMOC1):c.223C>T(p.Arg75*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000867 in 1,614,066 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

SMOC1
NM_001034852.3 stop_gained

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:3

Conservation

PhyloP100: 1.22

Variant links:

Genes affected

SMOC1 (HGNC:20318): (SPARC related modular calcium binding 1) This gene encodes a multi-domain secreted protein that may have a critical role in ocular and limb development. Mutations in this gene are associated with microphthalmia and limb anomalies. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2011]

SMOC1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 14-69952261-C-T is Pathogenic according to our data. Variant chr14-69952261-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 599220.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMOC1	NM_001034852.3 link	c.223C>T	p.Arg75*	stop_gained	Exon 2 of 12	ENST00000361956.8	NP_001030024.1	Q9H4F8-2
SMOC1	NM_001425244.1 link	c.223C>T	p.Arg75*	stop_gained	Exon 2 of 12		NP_001412173.1
SMOC1	NM_001425245.1 link	c.223C>T	p.Arg75*	stop_gained	Exon 2 of 12		NP_001412174.1
SMOC1	NM_022137.6 link	c.223C>T	p.Arg75*	stop_gained	Exon 2 of 12		NP_071420.1	Q9H4F8-1A0A024R6E0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SMOC1	ENST00000361956.8 link	c.223C>T	p.Arg75*	stop_gained	Exon 2 of 12	1	NM_001034852.3	ENSP00000355110.4	Q9H4F8-2
SMOC1	ENST00000381280.4 link	c.223C>T	p.Arg75*	stop_gained	Exon 2 of 12	1		ENSP00000370680.4	Q9H4F8-1
SMOC1	ENST00000553839.1 link	n.125C>T		non_coding_transcript_exon_variant	Exon 1 of 4	5
SMOC1	ENST00000555917.1 link	n.528C>T		non_coding_transcript_exon_variant	Exon 4 of 4	4

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000159

AC:

AN:

251332

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135820

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

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:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000821

AC:

AN:

1461872

Hom.:

Cov.:

AF XY:

0.00000688

AC XY:

AN XY:

727242

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000989

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152194

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74352

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Dec 14, 2023	Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; This variant is associated with the following publications: (PMID: 21750680, 31067494) -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Aug 12, 2024	This sequence change creates a premature translational stop signal (p.Arg75*) in the SMOC1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in SMOC1 are known to be pathogenic (PMID: 21194678). This variant is present in population databases (rs370866589, gnomAD 0.003%). This premature translational stop signal has been observed in individual(s) with ophthalmo-acromelic syndrome (PMID: 21750680, 31067494). ClinVar contains an entry for this variant (Variation ID: 599220). For these reasons, this variant has been classified as Pathogenic. -

Microphthalmia with limb anomalies

Pathogenic:1

Likely pathogenic, no assertion criteria provided

clinical testing

Hacettepe Genetic Diseases Diagnosis Center, Hacettepe University Faculty of Medicine

Nov 23, 2017

The p.Arg75Ter variant in SMOC1 has been observed for a 9-month-old Turkish female patient who was diagnosed with ophthalmo-acromelic syndrome. There was parental consanguinity and autosomal recessive inheritance pattern matching for this variant. In summary, the p.Arg75Ter variant meets our criteria to be classified as likely pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.58

BayesDel_noAF

Pathogenic

0.57

CADD

Pathogenic

DANN

Uncertain

1.0

Eigen

Uncertain

0.53

Eigen_PC

Uncertain

0.34

FATHMM_MKL

Uncertain

0.81

Vest4

0.43

GERP RS

0.67

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.11

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