rs387906721

Variant names:

• chrX-132082456-C-A
• rs387906721
• NM_194277.3:c.812G>T

Your query was ambiguous. Multiple possible variants found:

• chrX-132082456-C-A
• chrX-132082456-C-T

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PM1 PM2 PM5 PP3_Strong

The NM_194277.3(FRMD7):​c.812G>T​(p.Cys271Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging 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. C271Y) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 23)
• Consequence: FRMD7 NM_194277.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.91
• Publications: 10 publications found

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 Gene-Disease associations (from GenCC):

• nystagmus 1, congenital, X-linked

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_194277.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chrX-132082456-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 29977.Status of the report is no_assertion_criteria_provided, 0 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.989

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_194277.3. 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
	FRMD7	NM_194277.3	MANE Select	c.812G>T	p.Cys271Phe	missense	Exon 9 of 12	NP_919253.1
	FRMD7	NM_001306193.2		c.767G>T	p.Cys256Phe	missense	Exon 9 of 12	NP_001293122.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FRMD7	ENST00000298542.9	TSL:1 MANE Select	c.812G>T	p.Cys271Phe	missense	Exon 9 of 12	ENSP00000298542.3
	FRMD7	ENST00000464296.1	TSL:1	c.767G>T	p.Cys256Phe	missense	Exon 9 of 12	ENSP00000417996.1
	FRMD7	ENST00000370879.5	TSL:1	c.452G>T	p.Cys151Phe	missense	Exon 5 of 8	ENSP00000359916.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 23

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.61	D
BayesDel_noAF	Pathogenic	0.64
CADD	Pathogenic	28
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.77	D
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.93	D
M_CAP	Pathogenic	0.50	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	3.6	H
PhyloP100		7.9
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-10	D
REVEL	Pathogenic	0.96
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.95
MutPred		0.96		Loss of methylation at K269 (P = 0.0967)
MVP		0.99
MPC		1.1
ClinPred		1.0	D
GERP RS		5.2
Varity_R		0.99
gMVP		0.97
Mutation Taster		=0/100	disease causing

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: rs387906721; hg19: chrX-131216484;