X-147912049-CGCGGCGGCGGCGGCGGCGGCG-CGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGAGGCGGCGGCGGCGGCGGCGGCGGCGGCG

Variant names:

• chrX-147912049-C-CGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGAGGCGGCG
• rs193922936
• NM_002024.6:c.-100_-99insCGGAGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGG

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BS1 BS2

The NM_002024.6(FMR1):​c.-100_-99insCGGAGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGG variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. It is difficult to determine the true allele frequency of this variant because it is of type INS_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.00023 (0 hom., 6 hem., cov: 2)
• Consequence: FMR1 NM_002024.6 5_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.618
• Publications: 0 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-AS1 (HGNC:39081): (FMR1 antisense RNA 1)

ENSG00000274086 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -8 ACMG points.

• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000227 (8/35175) while in subpopulation AFR AF = 0.000411 (4/9740). AF 95% confidence interval is 0.00014. There are 0 homozygotes in GnomAd4. There are 6 alleles in the male GnomAd4 subpopulation. Median coverage is 2. This position passed quality control check.
• BS2: High Hemizygotes in GnomAd4 at 6 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FMR1	NM_002024.6	c.-100_-99insCGGAGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGG		5_prime_UTR_variant	Exon 1 of 17	ENST00000370475.9	NP_002015.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FMR1	ENST00000370475.9	c.-100_-99insCGGAGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGG		5_prime_UTR_variant	Exon 1 of 17	1	NM_002024.6	ENSP00000359506.5

Frequencies

GnomAD3 genomes AF: 0.000227 AC: 8 AN: 35175 Hom.: 0 Cov.: 2

Gnomad AFR AF: 0.000411

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000362

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: 0.000155

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 0

GnomAD4 genome AF: 0.000227 AC: 8 AN: 35175 Hom.: 0 Cov.: 2 AF XY: 0.00103 AC XY: 6 AN XY: 5801

African (AFR) AF: 0.000411 AC: 4 AN: 9740

American (AMR) AF: 0.000362 AC: 1 AN: 2760

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 832

East Asian (EAS) AF: 0.00 AC: 0 AN: 569

South Asian (SAS) AF: 0.00 AC: 0 AN: 426

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 836

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 69

European-Non Finnish (NFE) AF: 0.000155 AC: 3 AN: 19299

Other (OTH) AF: 0.00 AC: 0 AN: 465

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		0.62

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs193922936; hg19: chrX-146993567;