X-54446209-G-A

Position:

chrX-54446209-G-A

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 1P and 7B. PP2BP4_ModerateBS1_SupportingBS2

The NM_004463.3(FGD1):c.2786C>T(p.Pro929Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000752 in 1,210,178 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 23 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000036 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 0.000079 ( 0 hom. 23 hem. )

Consequence

FGD1
NM_004463.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2B:1

Conservation

PhyloP100: 4.59

Variant links:

Genes affected

FGD1 (HGNC:3663): (FYVE, RhoGEF and PH domain containing 1) This gene encodes a protein that contains Dbl (DH) and pleckstrin (PH) homology domains and is similar to the Rho family of small GTP-binding proteins. The encoded protein specifically binds to the Rho family GTPase Cdc42Hs and can stimulate the GDP-GTP exchange of the isoprenylated form of Cdc42Hs. It also stimulates the mitogen activated protein kinase cascade leading to c-Jun kinase SAPK/JNK1 activation. Defects in this gene are the cause of the faciogenital dysplasia in Aarskog-Scott syndrome and a syndromatic form of X-linked cognitive disability. [provided by RefSeq, Jul 2017]

FGD1 links:

TSR2 (HGNC:25455): (TSR2 ribosome maturation factor) The protein encoded by this gene appears to repress the transcription of NF-kappaB and may be involved in apoptosis. Defects in this gene are a cause of Diamond-Blackfan anemia. [provided by RefSeq, Oct 2016]

TSR2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), FGD1. . Gene score misZ 3.5183 (greater than the threshold 3.09). GenCC has associacion of gene with Aarskog-Scott syndrome, X-linked.

BP4

Computational evidence support a benign effect (MetaRNN=0.13852814).

BS1

Variant frequency is greater than expected in population nfe. gnomad4_exome allele frequency = 0.0000793 (87/1097554) while in subpopulation NFE AF= 0.0000962 (81/841849). AF 95% confidence interval is 0.0000789. There are 0 homozygotes in gnomad4_exome. There are 23 alleles in male gnomad4_exome subpopulation. Median coverage is 31. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High Hemizygotes in GnomAdExome4 at 23 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FGD1	NM_004463.3 linkuse as main transcript	c.2786C>T	p.Pro929Leu	missense_variant	18/18	ENST00000375135.4
TSR2	NM_058163.3 linkuse as main transcript	c.*1659G>A		3_prime_UTR_variant	5/5	ENST00000375151.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FGD1	ENST00000375135.4 linkuse as main transcript	c.2786C>T	p.Pro929Leu	missense_variant	18/18	1	NM_004463.3	P1
TSR2	ENST00000375151.5 linkuse as main transcript	c.*1659G>A		3_prime_UTR_variant	5/5	1	NM_058163.3	P1

Frequencies

GnomAD3 genomes

AF:

0.0000355

AC:

AN:

112624

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34784

show subpopulations

Gnomad AFR

AF:

0.0000645

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:

0.0000376

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000166

AC:

AN:

180518

Hom.:

AF XY:

0.0000153

AC XY:

AN XY:

65406

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:

0.0000373

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000793

AC:

AN:

1097554

Hom.:

Cov.:

AF XY:

0.0000634

AC XY:

AN XY:

362954

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:

0.0000962

Gnomad4 OTH exome

AF:

0.000130

GnomAD4 genome

AF:

0.0000355

AC:

AN:

112624

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34784

show subpopulations

Gnomad4 AFR

AF:

0.0000645

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:

0.0000376

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000214

Hom.:

Bravo

AF:

0.0000718

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Mar 19, 2014	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 10, 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. 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on FGD1 protein function. ClinVar contains an entry for this variant (Variation ID: 167061). This variant has not been reported in the literature in individuals affected with FGD1-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 929 of the FGD1 protein (p.Pro929Leu). -

TSR2-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 15, 2023

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). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.078

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.64

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.17

FATHMM_MKL

Uncertain

0.80

LIST_S2

Benign

0.77

M_CAP

Benign

0.024

MetaRNN

Benign

0.14

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.69

MutationTaster

Benign

0.99

PrimateAI

Uncertain

0.51

PROVEAN

Benign

-2.2

REVEL

Benign

0.087

Sift

Benign

0.066

Sift4G

Benign

0.082

Polyphen

0.073

Vest4

0.15

MutPred

0.25

Loss of glycosylation at T930 (P = 0.0342);

MVP

0.38

MPC

2.0

ClinPred

0.37

GERP RS

4.9

Varity_R

0.079

gMVP

0.54

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