rs17352801

Positions:

• chr2-100048223-G-A
• chr2-100048223-G-C
• chr2-100048223-G-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001386135.1(AFF3):​c.54-39291C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.1 in 152,208 control chromosomes in the GnomAD database, including 1,079 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.10 (1079 hom., cov: 33)
• Consequence: AFF3 NM_001386135.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.21

Genes affected

AFF3 (HGNC:6473): (ALF transcription elongation factor 3) This gene encodes a tissue-restricted nuclear transcriptional activator that is preferentially expressed in lymphoid tissue. Isolation of this protein initially defined a highly conserved LAF4/MLLT2 gene family of nuclear transcription factors that may function in lymphoid development and oncogenesis. In some ALL patients, this gene has been found fused to the gene for MLL. Multiple alternatively spliced transcript variants that encode different proteins have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.142 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
AFF3	NM_001386135.1	c.54-39291C>T		intron_variant		ENST00000672756.2	NP_001373064.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
AFF3	ENST00000672756.2	c.54-39291C>T		intron_variant			NM_001386135.1	ENSP00000500419	A2

Frequencies

GnomAD3 genomes AF: 0.101 AC: 15286 AN: 152090 Hom.: 1079 Cov.: 33

Gnomad AFR AF: 0.0388

Gnomad AMI AF: 0.00658

Gnomad AMR AF: 0.0599

Gnomad ASJ AF: 0.0331

Gnomad EAS AF: 0.000963

Gnomad SAS AF: 0.0723

Gnomad FIN AF: 0.216

Gnomad MID AF: 0.0506

Gnomad NFE AF: 0.145

Gnomad OTH AF: 0.0736

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.100 AC: 15287 AN: 152208 Hom.: 1079 Cov.: 33 AF XY: 0.102 AC XY: 7559 AN XY: 74406

Gnomad4 AFR AF: 0.0388

Gnomad4 AMR AF: 0.0598

Gnomad4 ASJ AF: 0.0331

Gnomad4 EAS AF: 0.000966

Gnomad4 SAS AF: 0.0723

Gnomad4 FIN AF: 0.216

Gnomad4 NFE AF: 0.145

Gnomad4 OTH AF: 0.0733

Alfa AF: 0.0789 Hom.: 169

Bravo AF: 0.0837

Asia WGS AF: 0.0360 AC: 126 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	8.0
DANN	Benign	0.55

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: rs17352801; hg19: chr2-100664685;