Variant chr2-219501530-C-T details in Genebe, Genetics Data Aggregator

Variant summary

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

The NM_013335.4(GMPPA):c.193C>T(p.Leu65Phe) variant causes a missense change. The variant allele was found at a frequency of 0.00000186 in 1,613,458 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

GMPPA
NM_013335.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.97

Variant links:

Genes affected

GMPPA (HGNC:22923): (GDP-mannose pyrophosphorylase A) This gene is thought to encode a GDP-mannose pyrophosphorylase. This enzyme catalyzes the reaction which converts mannose-1-phosphate and GTP to GDP-mannose which is involved in the production of N-linked oligosaccharides. [provided by RefSeq, Jul 2008]

GMPPA links:

ASIC4-AS1 (HGNC:40960): (ASIC4 antisense RNA 1)

ASIC4-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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	UniProt
GMPPA	NM_013335.4 linkuse as main transcript	c.193C>T	p.Leu65Phe	missense_variant	4/13	ENST00000313597.10
ASIC4-AS1	XR_923921.2 linkuse as main transcript	n.391+15166G>A		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GMPPA	ENST00000313597.10 linkuse as main transcript	c.193C>T	p.Leu65Phe	missense_variant	4/13	1	NM_013335.4	P1	Q96IJ6-1
ASIC4-AS1	ENST00000429882.1 linkuse as main transcript	n.182+15166G>A		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152212

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461246

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727008

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152212

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74364

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Alacrima, achalasia, and intellectual disability syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jun 15, 2022

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. 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: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals affected with GMPPA-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces leucine, which is neutral and non-polar, with phenylalanine, which is neutral and non-polar, at codon 65 of the GMPPA protein (p.Leu65Phe). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Pathogenic

0.27

BayesDel_noAF

Pathogenic

0.15

CADD

Benign

DANN

Benign

0.94

DEOGEN2

Uncertain

0.47

T;.;T;T;.;D;T;.

Eigen

Benign

-0.035

Eigen_PC

Benign

0.15

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.89

.;D;.;.;D;D;D;D

M_CAP

Uncertain

0.13

MetaRNN

Uncertain

0.66

D;D;D;D;D;D;D;D

MetaSVM

Uncertain

0.16

MutationAssessor

Benign

1.1

L;L;L;L;.;.;L;.

MutationTaster

Benign

1.0

D;D;D;D;D

PrimateAI

Uncertain

0.60

PROVEAN

Benign

-1.7

N;N;N;N;N;N;N;.

REVEL

Uncertain

0.56

Sift

Benign

0.76

T;T;T;T;T;T;T;.

Sift4G

Benign

0.49

T;T;T;T;T;T;T;T

Polyphen

0.21

B;B;B;B;.;.;B;.

Vest4

0.57

MutPred

0.48

Loss of glycosylation at P64 (P = 0.269);Loss of glycosylation at P64 (P = 0.269);Loss of glycosylation at P64 (P = 0.269);Loss of glycosylation at P64 (P = 0.269);Loss of glycosylation at P64 (P = 0.269);.;Loss of glycosylation at P64 (P = 0.269);Loss of glycosylation at P64 (P = 0.269);

MVP

0.90

MPC

0.77

ClinPred

0.92

GERP RS

5.2

Varity_R

0.25

gMVP

0.69

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over