17-43758681-C-A

Variant names:

• chr17-43758681-C-A
• rs387907169
• NM_025237.3:c.61G>T

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 5P and 1B. PM2 PM5 PP5 BP4

The NM_025237.3(SOST):​c.61G>T​(p.Val21Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V21M) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SOST NM_025237.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 2.65
• Publications: 3 publications found

Genes affected

SOST (HGNC:13771): (sclerostin) Sclerostin is a secreted glycoprotein with a C-terminal cysteine knot-like (CTCK) domain and sequence similarity to the DAN (differential screening-selected gene aberrative in neuroblastoma) family of bone morphogenetic protein (BMP) antagonists. Loss-of-function mutations in this gene are associated with an autosomal-recessive disorder, sclerosteosis, which causes progressive bone overgrowth. A deletion downstream of this gene, which causes reduced sclerostin expression, is associated with a milder form of the disorder called van Buchem disease. [provided by RefSeq, Jul 2008]

SOST Gene-Disease associations (from GenCC):

• sclerosteosis 1

  Inheritance: AR Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• craniodiaphyseal dysplasia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• hyperostosis corticalis generalisata

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• sclerosteosis

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• craniodiaphyseal dysplasia, autosomal dominant

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr17-43758681-C-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 31592.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP5: Variant 17-43758681-C-A is Pathogenic according to our data. Variant chr17-43758681-C-A is described in ClinVar as Pathogenic. ClinVar VariationId is 31593.Status of the report is no_assertion_criteria_provided, 0 stars.
• BP4: Computational evidence support a benign effect (MetaRNN=0.38860697). . Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SOST	NM_025237.3	c.61G>T	p.Val21Leu	missense_variant	Exon 1 of 2	ENST00000301691.3	NP_079513.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SOST	ENST00000301691.3	c.61G>T	p.Val21Leu	missense_variant	Exon 1 of 2	1	NM_025237.3	ENSP00000301691.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Craniodiaphyseal dysplasia, autosomal dominant Pathogenic:1

May 01, 2011

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	0.0040	T
BayesDel_noAF	Benign	-0.23
CADD	Benign	18
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.48	T
Eigen	Benign	-0.49
Eigen_PC	Benign	-0.47
FATHMM_MKL	Benign	0.61	D
LIST_S2	Benign	0.68	T
M_CAP	Benign	0.025	T
MetaRNN	Benign	0.39	T
MetaSVM	Benign	-0.67	T
MutationAssessor	Benign	1.6	L
PhyloP100		2.6
PrimateAI	Benign	0.47	T
PROVEAN	Benign	-0.11	N
REVEL	Benign	0.29
Sift	Benign	0.17	T
Sift4G	Benign	0.47	T
Polyphen		0.017	B
Vest4		0.50
MutPred		0.58		Loss of sheet (P = 0.0037);
MVP		0.95
MPC		0.77
ClinPred		0.19	T
GERP RS		3.5
PromoterAI		0.039	Neutral
Varity_R		0.078
gMVP		0.41
Mutation Taster		=54/46	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs387907169; hg19: chr17-41836049; COSMIC: COSV57012345;