13-37584026-C-G

Variant summary

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

The NM_006475.3(POSTN):c.1186G>C(p.Ala396Pro) 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. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: POSTN NM_006475.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.950

Genes affected

POSTN (HGNC:16953): (periostin) This gene encodes a secreted extracellular matrix protein that functions in tissue development and regeneration, including wound healing, and ventricular remodeling following myocardial infarction. The encoded protein binds to integrins to support adhesion and migration of epithelial cells. This protein plays a role in cancer stem cell maintenance and metastasis. Mice lacking this gene exhibit cardiac valve disease, and skeletal and dental defects. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Sep 2015]

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=0.30659434).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
POSTN	NM_006475.3	c.1186G>C	p.Ala396Pro	missense_variant	9/23	ENST00000379747.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
POSTN	ENST00000379747.9	c.1186G>C	p.Ala396Pro	missense_variant	9/23	1	NM_006475.3	P3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 16, 2021

The c.1186G>C (p.A396P) alteration is located in exon 9 (coding exon 9) of the POSTN gene. This alteration results from a G to C substitution at nucleotide position 1186, causing the alanine (A) at amino acid position 396 to be replaced by a proline (P). 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	0.70
BayesDel_addAF	Uncertain	0.023	T
BayesDel_noAF	Benign	-0.20
Cadd	Benign	20
Dann	Uncertain	0.99
Eigen	Benign	-0.66
Eigen_PC	Benign	-0.74
FATHMM_MKL	Benign	0.37	N
LIST_S2	Uncertain	0.95	D;D;D;D;D;D
M_CAP	Benign	0.068	D
MetaRNN	Benign	0.31	T;T;T;T;T;T
MetaSVM	Uncertain	0.11	D
MutationAssessor	Uncertain	2.3	M;.;M;M;M;M
MutationTaster	Benign	1.0	N;N;N;N;N;N
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-1.7	N;N;N;N;N;N
REVEL	Uncertain	0.36
Sift	Benign	0.17	T;T;T;T;T;T
Sift4G	Benign	0.26	T;T;T;T;T;T
Polyphen		0.35	B;.;.;P;.;P
Vest4		0.39
MutPred		0.61		Gain of catalytic residue at L391 (P = 2e-04);Gain of catalytic residue at L391 (P = 2e-04);Gain of catalytic residue at L391 (P = 2e-04);Gain of catalytic residue at L391 (P = 2e-04);Gain of catalytic residue at L391 (P = 2e-04);Gain of catalytic residue at L391 (P = 2e-04);
MVP		0.76
MPC		0.52
ClinPred		0.67	D
GERP RS		-2.8
Varity_R		0.44
gMVP		0.90

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: rs1161851802; hg19: chr13-38158163;