Genetic Variant FGD1:p.Pro941Pro (chrX-54446172-C-G) – ACMG Classification: Benign (-11 pts)

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP4_StrongBP6_ModerateBP7BS2

The NM_004463.3(FGD1):c.2823G>C(p.Pro941Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000413 in 1,209,301 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 3 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. P941P) has been classified as Likely benign.

Frequency

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

Exomes 𝑓: 0.0000036 ( 0 hom. 3 hem. )

Consequence

FGD1
NM_004463.3 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: -2.51

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

Diamond-Blackfan anemia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Diamond-Blackfan anemia 14 with mandibulofacial dysostosis
Inheritance: XL Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics

TSR2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -11 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.79).

BP6

Variant X-54446172-C-G is Benign according to our data. Variant chrX-54446172-C-G is described in ClinVar as Likely_benign. ClinVar VariationId is 1905026.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=-2.51 with no splicing effect.

BS2

High Hemizygotes in GnomAdExome4 at 3 AD,XL gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004463.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
FGD1	NM_004463.3	MANE Select	c.2823G>C	p.Pro941Pro	synonymous	Exon 18 of 18	NP_004454.2
TSR2	NM_058163.3	MANE Select	c.*1622C>G		3_prime_UTR	Exon 5 of 5	NP_477511.1	Q969E8
TSR2	NM_001346789.2		c.*1622C>G		3_prime_UTR	Exon 5 of 5	NP_001333718.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
FGD1	ENST00000375135.4	TSL:1 MANE Select	c.2823G>C	p.Pro941Pro	synonymous	Exon 18 of 18	ENSP00000364277.3	P98174
TSR2	ENST00000375151.5	TSL:1 MANE Select	c.*1622C>G		3_prime_UTR	Exon 5 of 5	ENSP00000364293.4	Q969E8
FGD1	ENST00000934021.1		c.2823G>C	p.Pro941Pro	synonymous	Exon 19 of 19	ENSP00000604080.1

Frequencies

GnomAD3 genomes

AF:

0.00000893

AC:

AN:

112015

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000325

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000111

AC:

AN:

179937

AF XY:

0.0000154

show subpopulations

Gnomad AFR exome

AF:

0.0000782

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000365

AC:

AN:

1097237

Hom.:

Cov.:

AF XY:

0.00000827

AC XY:

AN XY:

362659

show subpopulations

African (AFR)

AF:

0.0000758

AC:

AN:

26392

American (AMR)

AF:

0.00

AC:

AN:

35152

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19368

East Asian (EAS)

AF:

0.00

AC:

AN:

30194

South Asian (SAS)

AF:

0.0000371

AC:

AN:

53939

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40434

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4105

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

841624

Other (OTH)

AF:

0.00

AC:

AN:

46029

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000892

AC:

AN:

112064

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34258

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.0000324

AC:

AN:

30848

American (AMR)

AF:

0.00

AC:

AN:

10609

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2642

East Asian (EAS)

AF:

0.00

AC:

AN:

3517

South Asian (SAS)

AF:

0.00

AC:

AN:

2688

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6182

Middle Eastern (MID)

AF:

0.00

AC:

AN:

218

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

53145

Other (OTH)

AF:

0.00

AC:

AN:

1529

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

ClinVar

ClinVar submissions as Germline

Significance:Likely benign

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.79

CADD

Benign

0.26

(source)

DANN

Benign

0.77

PhyloP100

-2.5

Mutation Taster

=100/0

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over