X-54446144-G-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 1P and 4B. PP2BP4_Strong

The NM_004463.3(FGD1):c.2851C>T(p.Pro951Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000496 in 1,208,760 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P951T) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000018 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 0.0000036 ( 0 hom. 0 hem. )

Consequence

FGD1
NM_004463.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.0780

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 -3 ACMG points.

PP2

Missense variant where missense usually causes diseases, FGD1

BP4

Computational evidence support a benign effect (MetaRNN=0.055527866).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FGD1	NM_004463.3 linkuse as main transcript	c.2851C>T	p.Pro951Ser	missense_variant	18/18	ENST00000375135.4
TSR2	NM_058163.3 linkuse as main transcript	c.*1594G>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.2851C>T	p.Pro951Ser	missense_variant	18/18	1	NM_004463.3	P1
TSR2	ENST00000375151.5 linkuse as main transcript	c.*1594G>A		3_prime_UTR_variant	5/5	1	NM_058163.3	P1

Frequencies

GnomAD3 genomes

AF:

0.0000180

AC:

AN:

111401

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33575

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:

0.0000378

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000365

AC:

AN:

1097359

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

362779

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:

0.00000356

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000180

AC:

AN:

111401

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33575

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:

0.0000378

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 12, 2023

The c.2851C>T (p.P951S) alteration is located in exon 18 (coding exon 18) of the FGD1 gene. This alteration results from a C to T substitution at nucleotide position 2851, causing the proline (P) at amino acid position 951 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.074

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.63

Cadd

Benign

Dann

Uncertain

1.0

DEOGEN2

Benign

0.088

FATHMM_MKL

Benign

0.085

LIST_S2

Benign

0.68

M_CAP

Benign

0.038

MetaRNN

Benign

0.056

MetaSVM

Benign

-0.97

MutationAssessor

Benign

0.55

MutationTaster

Benign

1.0

PrimateAI

Benign

0.35

PROVEAN

Benign

-1.3

REVEL

Benign

0.13

Sift

Uncertain

0.0050

Sift4G

Pathogenic

0.0

Polyphen

0.0040

Vest4

0.15

MutPred

0.13

Loss of catalytic residue at P951 (P = 0.0056);

MVP

0.57

MPC

2.0

ClinPred

0.75

GERP RS

3.4

Varity_R

0.10

gMVP

0.26

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