6-112054398-T-C

Position:

• chr6-112054398-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_198239.2(CCN6):​c.41T>C​(p.Leu14Pro) 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. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: CCN6 NM_198239.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.21

Genes affected

CCN6 (HGNC:12771): (cellular communication network factor 6) This gene encodes a member of the WNT1 inducible signaling pathway (WISP) protein subfamily, which belongs to the connective tissue growth factor (CTGF) family. WNT1 is a member of a family of cysteine-rich, glycosylated signaling proteins that mediate diverse developmental processes. The CTGF family members are characterized by four conserved cysteine-rich domains: insulin-like growth factor-binding domain, von Willebrand factor type C module, thrombospondin domain and C-terminal cystine knot-like domain. This gene is overexpressed in colon tumors. It may be downstream in the WNT1 signaling pathway that is relevant to malignant transformation. Mutations of this gene are associated with progressive pseudorheumatoid dysplasia, an autosomal recessive skeletal disorder, indicating that the gene is essential for normal postnatal skeletal growth and cartilage homeostasis. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3214323).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CCN6	NM_198239.2	c.41T>C	p.Leu14Pro	missense_variant	1/5	ENST00000368666.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CCN6	ENST00000368666.7	c.41T>C	p.Leu14Pro	missense_variant	1/5	1	NM_198239.2	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251302 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135826

Gnomad AFR exome AF: 0.0000615

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: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.0000113

ESP6500AA AF: 0.000227 AC: 1

ESP6500EA AF: 0.00 AC: 0

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Feb 28, 2022

This variant has not been reported in the literature in individuals affected with WISP3-related conditions. This variant is present in population databases (rs372585876, gnomAD 0.007%). This sequence change replaces leucine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 14 of the WISP3 protein (p.Leu14Pro). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Uncertain	0.031	T
BayesDel_noAF	Uncertain	-0.010
CADD	Benign	19
DANN	Uncertain	1.0
DEOGEN2	Benign	0.11	.;T;T;T
Eigen	Benign	-0.33
Eigen_PC	Benign	-0.42
FATHMM_MKL	Benign	0.039	N
LIST_S2	Benign	0.57	T;T;.;.
M_CAP	Benign	0.077	D
MetaRNN	Benign	0.32	T;T;T;T
MetaSVM	Benign	-0.81	T
MutationAssessor	Benign	0.69	.;N;N;N
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.39	T
PROVEAN	Benign	-1.1	.;N;.;.
REVEL	Uncertain	0.52
Sift	Uncertain	0.0040	.;D;.;.
Sift4G	Uncertain	0.033	D;D;D;D
Polyphen		0.90	P;P;P;P
Vest4		0.39
MVP		0.58
MPC		0.44
ClinPred		0.52	D
GERP RS		2.6
Varity_R		0.37
gMVP		0.38

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: rs372585876; hg19: chr6-112375601;