Genetic Variant FMR1:c.-120_-100dupCGGCGGCGGCGGCGGCGGCGG (chrX-147912049-C-CGCGGCGGCGGCGGCGGCGGCG) – ACMG Classification: Benign (-10 pts)

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP6_ModerateBS1BS2

The NM_002024.6(FMR1):c.-120_-100dupCGGCGGCGGCGGCGGCGGCGG 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. Variant has been reported in ClinVar as Benign (★).

Frequency

Genomes: 𝑓 0.0049 ( 4 hom., 27 hem., cov: 2)

Exomes 𝑓: 0.0 ( 0 hom. 0 hem. )

Failed GnomAD Quality Control

Consequence

FMR1
NM_002024.6 5_prime_UTR

Scores

Not classified

Clinical Significance

Benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.618

Publications

0 publications found

Variant links:

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 links:

FMR1-AS1 (HGNC:39081): (FMR1 antisense RNA 1)

FMR1-AS1 links:

ENSG00000274086 (HGNC:):

ENSG00000274086 links:

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ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -10 ACMG points.

BP6

Variant X-147912049-C-CGCGGCGGCGGCGGCGGCGGCG is Benign according to our data. Variant chrX-147912049-C-CGCGGCGGCGGCGGCGGCGGCG is described in ClinVar as Benign. ClinVar VariationId is 766615.Status of the report is criteria_provided_single_submitter, 1 stars.

BS1

Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.00492 (173/35162) while in subpopulation AMR AF = 0.00904 (25/2766). AF 95% confidence interval is 0.00628. There are 4 homozygotes in GnomAd4. There are 27 alleles in the male GnomAd4 subpopulation. Median coverage is 2. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 4 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FMR1	NM_002024.6 link	c.-120_-100dupCGGCGGCGGCGGCGGCGGCGG		5_prime_UTR_variant	Exon 1 of 17	ENST00000370475.9	NP_002015.1	Q06787-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FMR1	ENST00000370475.9 link	c.-120_-100dupCGGCGGCGGCGGCGGCGGCGG		5_prime_UTR_variant	Exon 1 of 17	1	NM_002024.6	ENSP00000359506.5		Q06787-1

Frequencies

GnomAD3 genomes

AF:

0.00492

AC:

173

AN:

35164

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00349

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00906

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00176

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00719

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00544

Gnomad OTH

AF:

0.00430

GnomAD4 exome

Data not reliable, filtered out with message: AC0;AS_VQSR

AF:

0.00

AC:

AN:

6328

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

3418

African (AFR)

AF:

0.00

AC:

AN:

American (AMR)

AF:

0.00

AC:

AN:

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

East Asian (EAS)

AF:

0.00

AC:

AN:

South Asian (SAS)

AF:

0.00

AC:

AN:

European-Finnish (FIN)

AF:

0.00

AC:

AN:

Middle Eastern (MID)

AF:

0.00

AC:

AN:

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

5935

Other (OTH)

AF:

0.00

AC:

AN:

173

GnomAD4 genome

AF:

0.00492

AC:

173

AN:

35162

Hom.:

Cov.:

AF XY:

0.00465

AC XY:

AN XY:

5804

show subpopulations

African (AFR)

AF:

0.00349

AC:

AN:

9745

American (AMR)

AF:

0.00904

AC:

AN:

2766

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

832

East Asian (EAS)

AF:

0.00176

AC:

AN:

567

South Asian (SAS)

AF:

0.00

AC:

AN:

425

European-Finnish (FIN)

AF:

0.00719

AC:

AN:

834

Middle Eastern (MID)

AF:

0.00

AC:

AN:

European-Non Finnish (NFE)

AF:

0.00544

AC:

105

AN:

19289

Other (OTH)

AF:

0.00428

AC:

AN:

467

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Dec 31, 2019

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

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

Publications

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X-147912049-CGCGGCGGCGGCGGCGGCGGCG-CGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCGGCG

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over