NM_002025.4:c.3696A>T

Variant names:

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_002025.4(AFF2):c.3696A>T(p.Pro1232Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000227 in 1,209,382 control chromosomes in the GnomAD database, including 1 homozygotes. There are 72 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0011 ( 0 hom., 30 hem., cov: 23)

Exomes 𝑓: 0.00014 ( 1 hom. 42 hem. )

Consequence

AFF2
NM_002025.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: -2.54

Publications

0 publications found

Variant links:

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]

AFF2 Gene-Disease associations (from GenCC):

FRAXE intellectual disability
Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae)
non-syndromic X-linked intellectual disability
Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen

AFF2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.75).

BP6

Variant X-148987439-A-T is Benign according to our data. Variant chrX-148987439-A-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 195480.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-2.54 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00112 (125/111782) while in subpopulation AFR AF = 0.00404 (124/30694). AF 95% confidence interval is 0.00346. There are 0 homozygotes in GnomAd4. There are 30 alleles in the male GnomAd4 subpopulation. Median coverage is 23. This position passed quality control check.

BS2

High Hemizygotes in GnomAd4 at 30 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AFF2	NM_002025.4 link	c.3696A>T	p.Pro1232Pro	synonymous_variant	Exon 20 of 21	ENST00000370460.7	NP_002016.2	P51816-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AFF2	ENST00000370460.7 link	c.3696A>T	p.Pro1232Pro	synonymous_variant	Exon 20 of 21	5	NM_002025.4	ENSP00000359489.2		P51816-1

Frequencies

GnomAD3 genomes

AF:

0.00112

AC:

125

AN:

111727

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00405

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

GnomAD2 exomes

AF:

0.000273

AC:

AN:

183202

AF XY:

0.000103

show subpopulations

Gnomad AFR exome

AF:

0.00372

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000221

GnomAD4 exome

AF:

0.000137

AC:

150

AN:

1097600

Hom.:

Cov.:

AF XY:

0.000116

AC XY:

AN XY:

362964

show subpopulations

African (AFR)

AF:

0.00409

AC:

108

AN:

26393

American (AMR)

AF:

0.0000852

AC:

AN:

35201

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19380

East Asian (EAS)

AF:

0.00

AC:

AN:

30203

South Asian (SAS)

AF:

0.0000370

AC:

AN:

54124

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40533

Middle Eastern (MID)

AF:

0.000968

AC:

AN:

4131

European-Non Finnish (NFE)

AF:

0.00000238

AC:

AN:

841558

Other (OTH)

AF:

0.000673

AC:

AN:

46077

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome 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

GnomAD4 genome

AF:

0.00112

AC:

125

AN:

111782

Hom.:

Cov.:

AF XY:

0.000883

AC XY:

AN XY:

33964

show subpopulations

African (AFR)

AF:

0.00404

AC:

124

AN:

30694

American (AMR)

AF:

0.00

AC:

AN:

10603

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2638

East Asian (EAS)

AF:

0.00

AC:

AN:

3561

South Asian (SAS)

AF:

0.00

AC:

AN:

2589

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6118

Middle Eastern (MID)

AF:

0.00

AC:

AN:

218

European-Non Finnish (NFE)

AF:

0.0000188

AC:

AN:

53141

Other (OTH)

AF:

0.00

AC:

AN:

1531

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.517

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:

0.000285

Hom.:

Bravo

AF:

0.00147

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

May 05, 2016

Genetic Services Laboratory, University of Chicago

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Oct 22, 2014

Eurofins Ntd Llc (ga)

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:1

Dec 20, 2018

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

BayesDel_noAF

Benign

-0.75

CADD

Benign

0.12

(source)

DANN

Benign

0.58

PhyloP100

-2.5

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over