rs144693221

chr12-32625729-C-Achr12-32625729-C-Gchr12-32625729-C-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_001370298.3(FGD4):c.2122C>A(p.Pro708Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00488 in 1,613,710 control chromosomes in the GnomAD database, including 33 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P708A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0028 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0051 ( 33 hom. )

Consequence

FGD4
NM_001370298.3 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:10

Conservation

PhyloP100: -1.38

Variant links:

Genes affected

FGD4 (HGNC:19125): (FYVE, RhoGEF and PH domain containing 4) This gene encodes a protein that is involved in the regulation of the actin cytoskeleton and cell shape. This protein contains an actin filament-binding domain, which together with its Dbl homology domain and one of its pleckstrin homology domains, can form microspikes. This protein can activate MAPK8 independently of the actin filament-binding domain, and it is also involved in the activation of CDC42 via the exchange of bound GDP for free GTP. The activation of CDC42 also enables this protein to play a role in mediating the cellular invasion of Cryptosporidium parvum, an intracellular parasite that infects the gastrointestinal tract. Mutations in this gene can cause Charcot-Marie-Tooth disease type 4H (CMT4H), a disorder of the peripheral nervous system. Multiple alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2015]

FGD4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.009981662).

BP6

Variant 12-32625729-C-A is Benign according to our data. Variant chr12-32625729-C-A is described in ClinVar as [Likely_benign]. Clinvar id is 188396.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr12-32625729-C-A is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.0028 (426/151878) while in subpopulation NFE AF= 0.00463 (315/67990). AF 95% confidence interval is 0.00421. There are 0 homozygotes in gnomad4. There are 192 alleles in male gnomad4 subpopulation. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FGD4	NM_001370298.3 linkuse as main transcript	c.2122C>A	p.Pro708Thr	missense_variant	14/17	ENST00000534526.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FGD4	ENST00000534526.7 linkuse as main transcript	c.2122C>A	p.Pro708Thr	missense_variant	14/17	5	NM_001370298.3

Frequencies

GnomAD3 genomes

AF:

0.00281

AC:

426

AN:

151760

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00138

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00125

Gnomad ASJ

AF:

0.00259

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000416

Gnomad FIN

AF:

0.00162

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00463

Gnomad OTH

AF:

0.00336

GnomAD3 exomes

AF:

0.00328

AC:

825

AN:

251434

Hom.:

AF XY:

0.00340

AC XY:

462

AN XY:

135878

show subpopulations

Gnomad AFR exome

AF:

0.00111

Gnomad AMR exome

AF:

0.00139

Gnomad ASJ exome

AF:

0.00139

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.000784

Gnomad FIN exome

AF:

0.00212

Gnomad NFE exome

AF:

0.00577

Gnomad OTH exome

AF:

0.00293

GnomAD4 exome

AF:

0.00510

AC:

7452

AN:

1461832

Hom.:

Cov.:

AF XY:

0.00497

AC XY:

3617

AN XY:

727220

show subpopulations

Gnomad4 AFR exome

AF:

0.000986

Gnomad4 AMR exome

AF:

0.00141

Gnomad4 ASJ exome

AF:

0.00149

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.000754

Gnomad4 FIN exome

AF:

0.00279

Gnomad4 NFE exome

AF:

0.00618

Gnomad4 OTH exome

AF:

0.00341

GnomAD4 genome

AF:

0.00280

AC:

426

AN:

151878

Hom.:

Cov.:

AF XY:

0.00259

AC XY:

192

AN XY:

74160

show subpopulations

Gnomad4 AFR

AF:

0.00138

Gnomad4 AMR

AF:

0.00125

Gnomad4 ASJ

AF:

0.00259

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000416

Gnomad4 FIN

AF:

0.00162

Gnomad4 NFE

AF:

0.00463

Gnomad4 OTH

AF:

0.00332

Alfa

AF:

0.00452

Hom.:

Bravo

AF:

0.00289

TwinsUK

AF:

0.00674

AC:

ALSPAC

AF:

0.00571

AC:

ESP6500AA

AF:

0.000681

AC:

ESP6500EA

AF:

0.00581

AC:

ExAC

AF:

0.00399

AC:

484

EpiCase

AF:

0.00513

EpiControl

AF:

0.00516

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:10

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:3

Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Jun 24, 2019	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	May 07, 2019	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Mar 01, 2024	FGD4: BP4 -

Charcot-Marie-Tooth disease type 4H

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -
Likely benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Nov 29, 2023	- -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Eurofins Ntd Llc (ga)

Apr 26, 2016

- -

Charcot-Marie-Tooth disease

Benign:1

Benign, criteria provided, single submitter

clinical testing

Molecular Genetics Laboratory, London Health Sciences Centre

- -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 14, 2021

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

FGD4-related disorder

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Jun 18, 2019

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Charcot-Marie-Tooth disease type 4

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 30, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.077

BayesDel_addAF

Benign

-0.48

BayesDel_noAF

Benign

-0.47

Cadd

Benign

0.13

Dann

Benign

0.66

DEOGEN2

Benign

0.023

T;T;T;T;T

Eigen

Benign

-1.5

Eigen_PC

Benign

-1.6

FATHMM_MKL

Benign

0.13

LIST_S2

Uncertain

0.90

D;D;D;D;D

M_CAP

Benign

0.014

MetaRNN

Benign

0.010

T;T;T;T;T

MetaSVM

Benign

-0.81

MutationTaster

Benign

1.0

N;N;N;N;N;N

PrimateAI

Benign

0.47

PROVEAN

Uncertain

-4.0

D;D;D;D;D

REVEL

Benign

0.12

Sift

Benign

0.28

T;T;T;T;T

Sift4G

Benign

0.34

T;T;T;T;T

Polyphen

0.0030, 0.036, 0.0070

.;B;B;.;B

Vest4

0.25

MVP

0.57

MPC

0.44

ClinPred

0.035

GERP RS

-11

Varity_R

0.12

gMVP

0.46

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