NM_001368397.1:c.721G>C

Variant names:

• chrX-12690234-G-C
• rs1555895100
• NM_001368397.1:c.721G>C

Variant summary

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

The NM_001368397.1(FRMPD4):​c.721G>C​(p.Gly241Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: FRMPD4 NM_001368397.1 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 2.62
• Publications: 0 publications found

Genes affected

FRMPD4 (HGNC:29007): (FERM and PDZ domain containing 4) This gene encodes a multi-domain (WW, PDZ, FERM) containing protein. Through its interaction with other proteins (such as PSD-95), it functions as a positive regulator of dendritic spine morphogenesis and density, and is required for the maintenance of excitatory synaptic transmission. [provided by RefSeq, Jan 2010]

FRMPD4 Gene-Disease associations (from GenCC):

• X-linked complex neurodevelopmental disorder

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
• intellectual disability, X-linked 104

  Inheritance: XL Classification: STRONG, MODERATE Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae), Illumina
• non-syndromic X-linked intellectual disability

  Inheritance: XL Classification: SUPPORTIVE Submitted by: 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=0.24849036).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001368397.1. 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
	FRMPD4	NM_001368397.1	MANE Select	c.721G>C	p.Gly241Arg	missense	Exon 8 of 17	NP_001355326.1
	FRMPD4	NM_001368395.3		c.832G>C	p.Gly278Arg	missense	Exon 10 of 19	NP_001355324.1
	FRMPD4	NM_001368396.3		c.727G>C	p.Gly243Arg	missense	Exon 8 of 17	NP_001355325.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FRMPD4	ENST00000675598.1	MANE Select	c.721G>C	p.Gly241Arg	missense	Exon 8 of 17	ENSP00000502607.1
	FRMPD4	ENST00000380682.5	TSL:1	c.721G>C	p.Gly241Arg	missense	Exon 8 of 17	ENSP00000370057.1
	FRMPD4	ENST00000656302.1		c.775G>C	p.Gly259Arg	missense	Exon 10 of 19	ENSP00000499481.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 26

GnomAD4 genome Cov.: 23

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Mar 19, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.721G>C (p.G241R) alteration is located in exon 8 (coding exon 8) of the FRMPD4 gene. This alteration results from a G to C substitution at nucleotide position 721, causing the glycine (G) at amino acid position 241 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.

not provided Uncertain:1

Jun 22, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.68
BayesDel_addAF	Benign	-0.042	T
BayesDel_noAF	Benign	-0.30
CADD	Uncertain	24
DANN	Benign	0.95
DEOGEN2	Benign	0.033	T
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Uncertain	0.93	D
M_CAP	Pathogenic	0.47	D
MetaRNN	Benign	0.25	T
MetaSVM	Benign	-0.90	T
MutationAssessor	Benign	-0.81	N
PhyloP100		2.6
PrimateAI	Uncertain	0.75	T
PROVEAN	Benign	-0.86	N
REVEL	Uncertain	0.31
Sift	Benign	0.34	T
Sift4G	Benign	0.34	T
Polyphen		0.0060	B
Vest4		0.48
MutPred		0.40		Gain of methylation at K240 (P = 0.0672)
MVP		0.83
MPC		1.8
ClinPred		0.63	D
GERP RS		3.5
Varity_R		0.53
gMVP		0.61
Mutation Taster		=77/23	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: rs1555895100; hg19: chrX-12708353;