rs147266709

Positions:

• chr9-131523065-C-A
• chr9-131523065-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001077365.2(POMT1):​c.2137C>A​(p.Arg713Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R713C) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: POMT1 NM_001077365.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.72

Genes affected

POMT1 (HGNC:9202): (protein O-mannosyltransferase 1) The protein encoded by this gene is an O-mannosyltransferase that requires interaction with the product of the POMT2 gene for enzymatic function. The encoded protein is found in the membrane of the endoplasmic reticulum. Defects in this gene are a cause of Walker-Warburg syndrome (WWS) and limb-girdle muscular dystrophy type 2K (LGMD2K). Several transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Oct 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
POMT1	NM_001077365.2	c.2137C>A	p.Arg713Ser	missense_variant	20/20	ENST00000402686.8	NP_001070833.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
POMT1	ENST00000402686.8	c.2137C>A	p.Arg713Ser	missense_variant	20/20	1	NM_001077365.2	ENSP00000385797	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.63
BayesDel_addAF	Pathogenic	0.29	D
BayesDel_noAF	Pathogenic	0.18
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.93	.;.;.;D;.;D
Eigen	Uncertain	0.61
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Uncertain	0.92	D;D;D;D;.;D
M_CAP	Uncertain	0.22	D
MetaRNN	Uncertain	0.68	D;D;D;D;D;D
MetaSVM	Pathogenic	0.84	D
MutationAssessor	Uncertain	2.4	.;.;.;M;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D
PrimateAI	Benign	0.39	T
PROVEAN	Pathogenic	-4.6	D;D;D;D;D;D
REVEL	Pathogenic	0.81
Sift	Uncertain	0.0010	D;D;D;D;D;D
Sift4G	Uncertain	0.0030	D;D;D;D;D;D
Polyphen		0.98, 0.86	.;D;.;P;D;.
Vest4		0.57
MutPred		0.45		.;.;.;Loss of MoRF binding (P = 0.0267);.;.;
MVP		0.95
MPC		0.78
ClinPred		1.0	D
GERP RS		5.0
Varity_R		0.91
gMVP		0.45

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: rs147266709; hg19: chr9-134398452;