rs1557178460

chrX-147930216-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_002024.6(FMR1):c.602G>C(p.Arg201Thr) 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. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 22)
• Consequence: FMR1 NM_002024.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.82

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.837

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FMR1	NM_002024.6	c.602G>C	p.Arg201Thr	missense_variant	7/17	ENST00000370475.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FMR1	ENST00000370475.9	c.602G>C	p.Arg201Thr	missense_variant	7/17	1	NM_002024.6	P3

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 22

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 02, 2016

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.24	D
BayesDel_noAF	Uncertain	0.10
Cadd	Uncertain	25
Dann	Uncertain	0.98
DEOGEN2	Benign	0.39	T;.;.;.;.;T;T;.;D;T;T;.
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D;D;D;D;D;D;.;D;D;D;D;D
M_CAP	Pathogenic	0.76	D
MetaRNN	Pathogenic	0.84	D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	-0.00080	T
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D
PrimateAI	Pathogenic	0.83	D
Sift4G	Uncertain	0.012	D;D;D;D;D;D;D;D;D;D;D;D
Polyphen		0.99, 0.99, 0.95	.;.;.;D;.;D;D;D;P;.;.;.
Vest4		0.76
MutPred		0.48		Loss of MoRF binding (P = 0.0141);Loss of MoRF binding (P = 0.0141);Loss of MoRF binding (P = 0.0141);Loss of MoRF binding (P = 0.0141);Loss of MoRF binding (P = 0.0141);Loss of MoRF binding (P = 0.0141);Loss of MoRF binding (P = 0.0141);Loss of MoRF binding (P = 0.0141);Loss of MoRF binding (P = 0.0141);Loss of MoRF binding (P = 0.0141);.;Loss of MoRF binding (P = 0.0141);
MVP		0.87
MPC		2.4
ClinPred		1.0	D
GERP RS		5.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.95
gMVP		0.88

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

Other links and lift over

dbSNP: rs1557178460; hg19: chrX-147011735;