rs752582904

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PM1PM2PM5PP3_StrongPP5_Very_Strong

The NM_024301.5(FKRP):c.947C>G(p.Pro316Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000446 in 1,569,102 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P316S) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000042 ( 0 hom. )

Consequence

FKRP
NM_024301.5 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 5.61

Variant links:

Genes affected

FKRP (HGNC:17997): (fukutin related protein) This gene encodes a protein which is targeted to the medial Golgi apparatus and is necessary for posttranslational modification of dystroglycan. Mutations in this gene have been associated with congenital muscular dystrophy, cognitive disability, and cerebellar cysts. Several alternatively spliced transcript variants of this gene have been described, but the full-length nature of some of these variants has not been determined. [provided by RefSeq, Oct 2008]

FKRP links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PM1

In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 10 uncertain in NM_024301.5

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr19-46756396-C-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1026650.Status of the report is criteria_provided_single_submitter, 1 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.982

PP5

Variant 19-46756397-C-G is Pathogenic according to our data. Variant chr19-46756397-C-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 197347.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr19-46756397-C-G is described in Lovd as [Pathogenic]. Variant chr19-46756397-C-G is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FKRP	NM_024301.5 linkuse as main transcript	c.947C>G	p.Pro316Arg	missense_variant	4/4	ENST00000318584.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
FKRP	ENST00000318584.10 linkuse as main transcript	c.947C>G	p.Pro316Arg	missense_variant	4/4	1	NM_024301.5	P1
FKRP	ENST00000391909.7 linkuse as main transcript	c.947C>G	p.Pro316Arg	missense_variant	4/4	2		P1
FKRP	ENST00000597339.5 linkuse as main transcript	n.247-5436C>G		intron_variant, non_coding_transcript_variant		5
FKRP	ENST00000600646.5 linkuse as main transcript	n.247+7732C>G		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152128

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000602

AC:

AN:

166136

Hom.:

AF XY:

0.0000110

AC XY:

AN XY:

91092

show subpopulations

Gnomad AFR exome

AF:

0.00

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:

0.0000152

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000423

AC:

AN:

1416974

Hom.:

Cov.:

AF XY:

0.00000285

AC XY:

AN XY:

700788

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:

0.00000459

Gnomad4 OTH exome

AF:

0.0000171

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152128

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74322

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ExAC

AF:

0.00000888

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Autosomal recessive limb-girdle muscular dystrophy type 2I;C1847759:Muscular dystrophy-dystroglycanopathy type B5;C3150413:Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A5;C4284790:Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A1

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Sep 14, 2021

- -

not provided

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Eurofins Ntd Llc (ga)

Sep 04, 2015

- -

Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A5

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Baylor Genetics

Jul 12, 2022

- -

Walker-Warburg congenital muscular dystrophy

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Sep 26, 2023

This variant is present in population databases (rs752582904, gnomAD 0.002%). This missense change has been observed in individual(s) with congenital muscular dystrophy (PMID: 11592034, 11741828, 16368217, 25135358). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 197347). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt FKRP protein function. This variant disrupts the p.Pro316 amino acid residue in FKRP. Other variant(s) that disrupt this residue have been observed in individuals with FKRP-related conditions (PMID: 12654965, 12666124, 16368217), which suggests that this may be a clinically significant amino acid residue. For these reasons, this variant has been classified as Pathogenic. This sequence change replaces proline, which is neutral and non-polar, with arginine, which is basic and polar, at codon 316 of the FKRP protein (p.Pro316Arg). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.95

BayesDel_addAF

Pathogenic

0.53

BayesDel_noAF

Pathogenic

0.52

Cadd

Uncertain

Dann

Uncertain

0.99

DEOGEN2

Pathogenic

0.83

D;D

Eigen

Uncertain

0.33

Eigen_PC

Benign

0.17

FATHMM_MKL

Pathogenic

0.98

M_CAP

Pathogenic

0.95

MetaRNN

Pathogenic

0.98

D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Uncertain

2.7

M;M

MutationTaster

Benign

1.0

D;D

PrimateAI

Pathogenic

0.81

PROVEAN

Pathogenic

-7.5

D;D

REVEL

Pathogenic

0.90

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

D;D

Vest4

0.92

MutPred

0.84

Gain of MoRF binding (P = 6e-04);Gain of MoRF binding (P = 6e-04);

MVP

1.0

MPC

1.7

ClinPred

0.99

GERP RS

3.1

Varity_R

0.93

gMVP

0.93

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

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