X-54446224-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2PP2BP4_Moderate

The NM_004463.3(FGD1):c.2771C>T(p.Thr924Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000033 in 1,210,433 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000089 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 0.0000027 ( 0 hom. 1 hem. )

Consequence

FGD1
NM_004463.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.193

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:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant where missense usually causes diseases, FGD1

BP4

Computational evidence support a benign effect (MetaRNN=0.11676219).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FGD1	NM_004463.3 linkuse as main transcript	c.2771C>T	p.Thr924Met	missense_variant	18/18	ENST00000375135.4
TSR2	NM_058163.3 linkuse as main transcript	c.*1674G>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.2771C>T	p.Thr924Met	missense_variant	18/18	1	NM_004463.3	P1
TSR2	ENST00000375151.5 linkuse as main transcript	c.*1674G>A		3_prime_UTR_variant	5/5	1	NM_058163.3	P1

Frequencies

GnomAD3 genomes

AF:

0.00000886

AC:

AN:

112869

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

35005

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:

0.0000188

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000273

AC:

AN:

1097564

Hom.:

Cov.:

AF XY:

0.00000276

AC XY:

AN XY:

362956

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000517

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000238

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000886

AC:

AN:

112869

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

35005

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:

0.0000188

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

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Apr 08, 2021

Not observed in large population cohorts (Lek et al., 2016); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.54

Cadd

Benign

Dann

Uncertain

1.0

DEOGEN2

Benign

0.37

FATHMM_MKL

Benign

0.21

LIST_S2

Benign

0.75

M_CAP

Benign

0.042

MetaRNN

Benign

0.12

MetaSVM

Benign

-0.87

MutationAssessor

Benign

0.55

MutationTaster

Benign

0.53

PrimateAI

Benign

0.46

PROVEAN

Uncertain

-2.9

REVEL

Benign

0.10

Sift

Uncertain

0.0020

Sift4G

Uncertain

0.019

Polyphen

0.84

Vest4

0.072

MutPred

0.31

Loss of phosphorylation at T924 (P = 0.0084);

MVP

0.56

MPC

1.4

ClinPred

0.65

GERP RS

3.9

Varity_R

0.15

gMVP

0.24

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