chrX-148500637-T-TGCCGCCGCCGCCGCCGCCGCC

Variant names:

• chrX-148500637-T-TGCCGCCGCCGCCGCCGCCGCC
• rs193922937
• NM_002025.4:c.-434_-414dupCGCCGCCGCCGCCGCCGCCGC

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BS1 BS2

The NM_002025.4(AFF2):​c.-434_-414dupCGCCGCCGCCGCCGCCGCCGC variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.014 (61 hom., 140 hem., cov: 0)
  • Exomes 𝑓: 0.0 (0 hom. 0 hem.)
  • Failed GnomAD Quality Control
• Consequence: AFF2 NM_002025.4 5_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.80

Genes affected

AFF2 (HGNC:3776): (ALF transcription elongation factor 2) This gene encodes a putative transcriptional activator that is a member of the AF4\FMR2 gene family. This gene is associated with the folate-sensitive fragile X E locus on chromosome X. A repeat polymorphism in the fragile X E locus results in silencing of this gene causing Fragile X E syndrome. Fragile X E syndrome is a form of nonsyndromic X-linked cognitive disability. In addition, this gene contains 6-25 GCC repeats that are expanded to >200 repeats in the disease state. Alternate splicing results in multiple transcript variants.[provided by RefSeq, Jul 2016]

ENSG00000237741 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -8 ACMG points.

• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0142 (1035/73114) while in subpopulation AFR AF= 0.0204 (402/19694). AF 95% confidence interval is 0.0188. There are 61 homozygotes in gnomad4. There are 140 alleles in male gnomad4 subpopulation. Median coverage is 0. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 61 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AFF2	NM_002025.4	c.-434_-414dupCGCCGCCGCCGCCGCCGCCGC		5_prime_UTR_variant	Exon 1 of 21	ENST00000370460.7	NP_002016.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AFF2	ENST00000370460	c.-434_-414dupCGCCGCCGCCGCCGCCGCCGC		5_prime_UTR_variant	Exon 1 of 21	5	NM_002025.4	ENSP00000359489.2
AFF2	ENST00000342251.7	c.-461_-460insGCCGCCGCCGCCGCCGCCGCC		upstream_gene_variant		1		ENSP00000345459.4
ENSG00000237741	ENST00000456981.1	n.-43_-23dupGGCGGCGGCGGCGGCGGCGGC		upstream_gene_variant		3

Frequencies

GnomAD3 genomes AF: 0.0142 AC: 1037 AN: 73129 Hom.: 61 Cov.: 0 AF XY: 0.00906 AC XY: 140 AN XY: 15453

Gnomad AFR AF: 0.0205

Gnomad AMI AF: 0.0172

Gnomad AMR AF: 0.0186

Gnomad ASJ AF: 0.0180

Gnomad EAS AF: 0.0180

Gnomad SAS AF: 0.00647

Gnomad FIN AF: 0.00521

Gnomad MID AF: 0.00980

Gnomad NFE AF: 0.0103

Gnomad OTH AF: 0.0211

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 614 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 164

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0142 AC: 1035 AN: 73114 Hom.: 61 Cov.: 0 AF XY: 0.00905 AC XY: 140 AN XY: 15464

Gnomad4 AFR AF: 0.0204

Gnomad4 AMR AF: 0.0186

Gnomad4 ASJ AF: 0.0180

Gnomad4 EAS AF: 0.0181

Gnomad4 SAS AF: 0.00655

Gnomad4 FIN AF: 0.00521

Gnomad4 NFE AF: 0.0103

Gnomad4 OTH AF: 0.0210

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs193922937; hg19: chrX-147582157;