chr14-77298349-C-T

Position:

• chr14-77298349-C-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_013382.7(POMT2):​c.1006+340G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.193 in 152,170 control chromosomes in the GnomAD database, including 3,234 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.19 (3234 hom., cov: 32)
• Consequence: POMT2 NM_013382.7 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.685

Genes affected

POMT2 (HGNC:19743): (protein O-mannosyltransferase 2) The protein encoded by this gene is an O-mannosyltransferase that requires interaction with the product of the POMT1 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).[provided by RefSeq, Oct 2008]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.98).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.295 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
POMT2	NM_013382.7	c.1006+340G>A		intron_variant		ENST00000261534.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
POMT2	ENST00000261534.9	c.1006+340G>A		intron_variant		1	NM_013382.7	P1

Frequencies

GnomAD3 genomes AF: 0.193 AC: 29326 AN: 152052 Hom.: 3234 Cov.: 32

Gnomad AFR AF: 0.299

Gnomad AMI AF: 0.191

Gnomad AMR AF: 0.121

Gnomad ASJ AF: 0.180

Gnomad EAS AF: 0.00829

Gnomad SAS AF: 0.239

Gnomad FIN AF: 0.151

Gnomad MID AF: 0.225

Gnomad NFE AF: 0.162

Gnomad OTH AF: 0.187

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.193 AC: 29349 AN: 152170 Hom.: 3234 Cov.: 32 AF XY: 0.191 AC XY: 14179 AN XY: 74402

Gnomad4 AFR AF: 0.299

Gnomad4 AMR AF: 0.121

Gnomad4 ASJ AF: 0.180

Gnomad4 EAS AF: 0.00830

Gnomad4 SAS AF: 0.240

Gnomad4 FIN AF: 0.151

Gnomad4 NFE AF: 0.162

Gnomad4 OTH AF: 0.184

Alfa AF: 0.159 Hom.: 3593

Bravo AF: 0.191

Asia WGS AF: 0.153 AC: 535 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.98
CADD	Benign	0.55
DANN	Benign	0.51

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: rs17105685; hg19: chr14-77764692;