chrX-132077892-A-G

Position:

chrX-132077892-A-G

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_194277.3(FRMD7):c.2125T>C(p.Cys709Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000043 in 1,208,748 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 11 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000036 ( 0 hom., 0 hem., cov: 22)

Exomes 𝑓: 0.000044 ( 0 hom. 11 hem. )

Consequence

FRMD7
NM_194277.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.28

Variant links:

Genes affected

FRMD7 (HGNC:8079): (FERM domain containing 7) Predicted to enable guanyl-nucleotide exchange factor activity. Predicted to be involved in regulation of neuron projection development. Predicted to act upstream of or within several processes, including negative regulation of stress fiber assembly; positive regulation of lamellipodium assembly; and positive regulation of small GTPase mediated signal transduction. Located in cytosol; nucleoplasm; and plasma membrane. Implicated in congenital nystagmus 1. [provided by Alliance of Genome Resources, Apr 2022]

FRMD7 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.107871294).

BS2

High Hemizygotes in GnomAdExome4 at 11 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FRMD7	NM_194277.3 linkuse as main transcript	c.2125T>C	p.Cys709Arg	missense_variant	12/12	ENST00000298542.9	NP_919253.1	Q6ZUT3-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
FRMD7	ENST00000298542.9 linkuse as main transcript	c.2125T>C	p.Cys709Arg	missense_variant	12/12	1	NM_194277.3	ENSP00000298542.3	Q6ZUT3-1
FRMD7	ENST00000464296.1 linkuse as main transcript	c.2080T>C	p.Cys694Arg	missense_variant	12/12	1		ENSP00000417996.1	Q6ZUT3-2
FRMD7	ENST00000370879.5 linkuse as main transcript	c.1765T>C	p.Cys589Arg	missense_variant	8/8	1		ENSP00000359916.1	X6R7S7

Frequencies

GnomAD3 genomes

AF:

0.0000356

AC:

AN:

112486

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34634

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:

0.0000751

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000547

AC:

AN:

182834

Hom.:

AF XY:

0.00

AC XY:

AN XY:

67514

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000123

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000438

AC:

AN:

1096262

Hom.:

Cov.:

AF XY:

0.0000304

AC XY:

AN XY:

361674

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:

0.0000488

Gnomad4 OTH exome

AF:

0.000152

GnomAD4 genome

AF:

0.0000356

AC:

AN:

112486

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34634

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:

0.0000751

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000434

Hom.:

Bravo

AF:

0.0000113

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

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

Labcorp Genetics (formerly Invitae), Labcorp

Jul 14, 2023

This sequence change replaces cysteine, which is neutral and slightly polar, with arginine, which is basic and polar, at codon 709 of the FRMD7 protein (p.Cys709Arg). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with FRMD7-related conditions. ClinVar contains an entry for this variant (Variation ID: 1002510). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The arginine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.082

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Benign

-0.44

CADD

Benign

6.9

DANN

Benign

0.59

DEOGEN2

Benign

0.012

.;T;.

FATHMM_MKL

Benign

0.69

LIST_S2

Benign

0.29

T;T;T

M_CAP

Benign

0.038

MetaRNN

Benign

0.11

T;T;T

MetaSVM

Benign

-0.82

MutationAssessor

Benign

1.2

.;L;.

PrimateAI

Benign

0.33

PROVEAN

Benign

-0.32

N;N;N

REVEL

Benign

0.16

Sift

Benign

0.26

T;T;T

Sift4G

Benign

0.34

T;T;T

Polyphen

0.0

.;B;B

Vest4

0.11

MutPred

0.50

.;Gain of disorder (P = 0.0058);.;

MVP

0.32

MPC

0.41

ClinPred

0.048

GERP RS

2.1

Varity_R

0.27

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