rs1208033042

Variant names:

• chr12-32582304-G-A
• rs1208033042
• NM_001370298.3:c.848G>A

Your query was ambiguous. Multiple possible variants found:

• chr12-32582304-G-A
• chr12-32582304-G-T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001370298.3(FGD4):​c.848G>A​(p.Ser283Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,876 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S283I) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: FGD4 NM_001370298.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.30
• Publications: 2 publications found

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 Gene-Disease associations (from GenCC):

• Charcot-Marie-Tooth disease

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Charcot-Marie-Tooth disease type 4H

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07351887).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001370298.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FGD4	NM_001370298.3	MANE Select	c.848G>A	p.Ser283Asn	missense	Exon 4 of 17	NP_001357227.2
	FGD4	NM_001384126.1		c.848G>A	p.Ser283Asn	missense	Exon 4 of 18	NP_001371055.1
	FGD4	NM_001304481.2		c.692G>A	p.Ser231Asn	missense	Exon 4 of 17	NP_001291410.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FGD4	ENST00000534526.7	TSL:5 MANE Select	c.848G>A	p.Ser283Asn	missense	Exon 4 of 17	ENSP00000449273.1
	FGD4	ENST00000395740.5	TSL:1	n.437G>A		non_coding_transcript_exon	Exon 4 of 17	ENSP00000379089.1
	FGD4	ENST00000494275.5	TSL:1	n.788G>A		non_coding_transcript_exon	Exon 3 of 3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251428 AF XY: 0.00000736

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461876 Hom.: 0 Cov.: 32 AF XY: 0.00000275 AC XY: 2 AN XY: 727236

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.0000232 AC: 2 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112000

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.062
BayesDel_addAF	Benign	-0.38	T
BayesDel_noAF	Benign	-0.69
CADD	Benign	0.080
DANN	Benign	0.46
DEOGEN2	Benign	0.010	T
Eigen	Benign	-1.7
Eigen_PC	Benign	-1.8
FATHMM_MKL	Benign	0.0061	N
LIST_S2	Benign	0.44	T
M_CAP	Benign	0.019	T
MetaRNN	Benign	0.074	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.34	N
PhyloP100		-1.3
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-0.55	N
REVEL	Benign	0.070
Sift	Benign	0.43	T
Sift4G	Benign	0.47	T
Polyphen		0.0	B
Vest4		0.022
MutPred		0.28		Loss of glycosylation at S258 (P = 0.004)
MVP		0.55
MPC		0.30
ClinPred		0.027	T
GERP RS		-10
Varity_R		0.11
gMVP		0.11
Mutation Taster		=94/6	polymorphism

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

Other links and lift over

dbSNP: rs1208033042; hg19: chr12-32735238;