Genetic Variant NM_018027.5:c.2801G>A (chr10-13656788-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_018027.5(FRMD4A):c.2801G>A(p.Arg934His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000277 in 1,441,954 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000028 ( 0 hom. )

Consequence

FRMD4A
NM_018027.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.43

Variant links:

Genes affected

FRMD4A (HGNC:25491): (FERM domain containing 4A) This gene encodes a FERM domain-containing protein that regulates epithelial cell polarity. It connects ADP ribosylation factor 6 (ARF6) with the Par protein complex, which regulates the remodeling of adherens junctions and linear actin cable formation during epithelial cell polarization. Polymorphisms in this gene are associated with Alzheimer's disease, and also with nicotine dependence. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2015]

FRMD4A links:

PRPF18 (HGNC:17351): (pre-mRNA processing factor 18) Pre-mRNA splicing occurs in 2 sequential transesterification steps. The protein encoded by this gene is found to be essential for the catalytic step II in pre-mRNA splicing process. It is found in the spliceosome, and contains seven WD repeats, which function in protein-protein interactions. This protein has a sequence similarity to the yeast splicing factor Prp18. [provided by RefSeq, Jul 2008]

PRPF18 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FRMD4A	NM_018027.5 link	c.2801G>A	p.Arg934His	missense_variant	Exon 22 of 25	ENST00000357447.7	NP_060497.3	Q9P2Q2
FRMD4A	NM_001318337.2 link	c.2900G>A	p.Arg967His	missense_variant	Exon 21 of 24		NP_001305266.1	Q9P2Q2
FRMD4A	NM_001318336.2 link	c.2849G>A	p.Arg950His	missense_variant	Exon 21 of 24		NP_001305265.1	Q9P2Q2Q9NW91
FRMD4A	NM_001318338.2 link	c.1874G>A	p.Arg625His	missense_variant	Exon 11 of 14		NP_001305267.1	Q9P2Q2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
FRMD4A	ENST00000357447.7 link	c.2801G>A	p.Arg934His	missense_variant	Exon 22 of 25	1	NM_018027.5	ENSP00000350032.2	Q9P2Q2
FRMD4A	ENST00000495956.3 link	c.2801G>A	p.Arg934His	missense_variant	Exon 22 of 24	2		ENSP00000488764.2	A0A0J9YYA7
PRPF18	ENST00000593351.2 link	n.47+8558C>T		intron_variant	Intron 1 of 2	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000885

AC:

AN:

225914

Hom.:

AF XY:

0.0000163

AC XY:

AN XY:

123040

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000126

Gnomad SAS 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:

0.00000277

AC:

AN:

1441954

Hom.:

Cov.:

AF XY:

0.00000418

AC XY:

AN XY:

716996

show subpopulations

Gnomad4 AFR exome

AF:

0.0000629

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000533

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000165

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

BayesDel_addAF

Pathogenic

0.33

BayesDel_noAF

Pathogenic

0.49

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.17

Eigen

Uncertain

0.20

Eigen_PC

Uncertain

0.29

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Pathogenic

0.98

M_CAP

Pathogenic

0.36

MetaRNN

Uncertain

0.74

MetaSVM

Uncertain

0.61

MutationAssessor

Benign

2.0

PrimateAI

Pathogenic

0.86

PROVEAN

Benign

-1.8

REVEL

Pathogenic

0.71

Sift

Pathogenic

0.0

Sift4G

Uncertain

0.0040

Polyphen

0.76

Vest4

0.98

MutPred

0.34

Loss of MoRF binding (P = 0.0247);

MVP

0.96

MPC

1.0

ClinPred

0.83

GERP RS

4.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.60

gMVP

0.60

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

Computational scores

Splicing

Publications

LitVar

Other links and lift over