chrX-147948696-G-T

Variant names:

• chrX-147948696-G-T
• rs587780338
• NM_002024.6:c.1751G>T

Variant summary

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

The NM_002024.6(FMR1):​c.1751G>T​(p.Cys584Phe) variant causes a missense change. The variant allele was found at a frequency of 0.00000165 in 1,209,915 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 10/17 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. C584Y) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0000089 (0 hom., 1 hem., cov: 23)
  • Exomes 𝑓: 9.1e-7 (0 hom. 0 hem.)
• Consequence: FMR1 NM_002024.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.96
• Publications: 1 publications found

Genes affected

FMR1 (HGNC:3775): (fragile X messenger ribonucleoprotein 1) The protein encoded by this gene binds RNA and is associated with polysomes. The encoded protein may be involved in mRNA trafficking from the nucleus to the cytoplasm. A trinucleotide repeat (CGG) in the 5' UTR is normally found at 6-53 copies, but an expansion to 55-230 repeats is the cause of fragile X syndrome. Expansion of the trinucleotide repeat may also cause one form of premature ovarian failure (POF1). Multiple alternatively spliced transcript variants that encode different protein isoforms and which are located in different cellular locations have been described for this gene. [provided by RefSeq, May 2010]

FMR1 Gene-Disease associations (from GenCC):

• fragile X syndrome

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, ClinGen, G2P, Orphanet, Labcorp Genetics (formerly Invitae), Myriad Women’s Health
• fragile X-associated tremor/ataxia syndrome

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae), Orphanet
• premature ovarian failure 1

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• symptomatic form of fragile X syndrome in female carrier

  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=0.20975867).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002024.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FMR1	NM_002024.6	MANE Select	c.1751G>T	p.Cys584Phe	missense	Exon 17 of 17	NP_002015.1	Q06787-1
	FMR1	NM_001185076.2		c.1688G>T	p.Cys563Phe	missense	Exon 16 of 16	NP_001172005.1	Q06787-9
	FMR1	NM_001185082.2		c.1613G>T	p.Cys538Phe	missense	Exon 16 of 16	NP_001172011.1	Q06787-8

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FMR1	ENST00000370475.9	TSL:1 MANE Select	c.1751G>T	p.Cys584Phe	missense	Exon 17 of 17	ENSP00000359506.5	Q06787-1
	FMR1	ENST00000218200.12	TSL:1	c.1688G>T	p.Cys563Phe	missense	Exon 16 of 16	ENSP00000218200.8	Q06787-9
	FMR1	ENST00000440235.6	TSL:1	c.1613G>T	p.Cys538Phe	missense	Exon 16 of 16	ENSP00000413764.3	Q06787-8

Frequencies

GnomAD3 genomes AF: 0.00000893 AC: 1 AN: 111927 Hom.: 0 Cov.: 23

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: 0.0000188

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 9.11e-7 AC: 1 AN: 1097988 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 363364

African (AFR) AF: 0.00 AC: 0 AN: 26400

American (AMR) AF: 0.00 AC: 0 AN: 35207

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19380

East Asian (EAS) AF: 0.0000331 AC: 1 AN: 30196

South Asian (SAS) AF: 0.00 AC: 0 AN: 54125

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40527

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4136

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 841937

Other (OTH) AF: 0.00 AC: 0 AN: 46080

GnomAD4 genome AF: 0.00000893 AC: 1 AN: 111927 Hom.: 0 Cov.: 23 AF XY: 0.0000293 AC XY: 1 AN XY: 34095

African (AFR) AF: 0.00 AC: 0 AN: 30752

American (AMR) AF: 0.00 AC: 0 AN: 10531

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 2650

East Asian (EAS) AF: 0.00 AC: 0 AN: 3571

South Asian (SAS) AF: 0.00 AC: 0 AN: 2698

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 6056

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 237

European-Non Finnish (NFE) AF: 0.0000188 AC: 1 AN: 53245

Other (OTH) AF: 0.00 AC: 0 AN: 1501

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Benign	-0.22
CADD	Uncertain	23
DANN	Benign	0.94
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.44	T
M_CAP	Uncertain	0.23	D
MetaRNN	Benign	0.21	T
MetaSVM	Benign	-1.1	T
PhyloP100		6.0
PROVEAN	Benign	0.61	N
REVEL	Benign	0.13
Sift	Pathogenic	0.0	D
Vest4		0.23
MutPred		0.18		Gain of disorder (P = 0.027)
MVP		0.87
ClinPred		0.86	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.59
Mutation Taster		=84/16	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs587780338; hg19: chrX-147030216;