20-40686142-T-C

Position:

• chr20-40686142-T-C

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_Moderate BP6_Moderate BS2

The NM_005461.5(MAFB):​c.*1737A>G variant causes a 3 prime UTR change. The variant allele was found at a frequency of 0.00101 in 203,224 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0011 (0 hom., cov: 33)
  • Exomes 𝑓: 0.00079 (0 hom.)
• Consequence: MAFB NM_005461.5 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 4.93

Genes affected

MAFB (HGNC:6408): (MAF bZIP transcription factor B) The protein encoded by this gene is a basic leucine zipper (bZIP) transcription factor that plays an important role in the regulation of lineage-specific hematopoiesis. The encoded nuclear protein represses ETS1-mediated transcription of erythroid-specific genes in myeloid cells. This gene contains no introns. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -8 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.29).
• BP6: Variant 20-40686142-T-C is Benign according to our data. Variant chr20-40686142-T-C is described in ClinVar as [Benign]. Clinvar id is 338377.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS2: High AC in GnomAd4 at 166 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MAFB	NM_005461.5	c.*1737A>G		3_prime_UTR_variant	1/1	ENST00000373313.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MAFB	ENST00000373313.3	c.*1737A>G		3_prime_UTR_variant	1/1		NM_005461.5	P1

Frequencies

GnomAD3 genomes AF: 0.00109 AC: 166 AN: 152240 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000965

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00510

Gnomad ASJ AF: 0.000864

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.000376

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.000999

Gnomad OTH AF: 0.00382

GnomAD4 exome AF: 0.000786 AC: 40 AN: 50866 Hom.: 0 Cov.: 0 AF XY: 0.00106 AC XY: 25 AN XY: 23550

Gnomad4 AFR exome AF: 0.000460

Gnomad4 AMR exome AF: 0.00519

Gnomad4 ASJ exome AF: 0.00153

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000749

Gnomad4 OTH exome AF: 0.000962

GnomAD4 genome AF: 0.00109 AC: 166 AN: 152358 Hom.: 0 Cov.: 33 AF XY: 0.00115 AC XY: 86 AN XY: 74516

Gnomad4 AFR AF: 0.0000962

Gnomad4 AMR AF: 0.00510

Gnomad4 ASJ AF: 0.000864

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.000376

Gnomad4 NFE AF: 0.000999

Gnomad4 OTH AF: 0.00378

Alfa AF: 0.000832 Hom.: 0

Bravo AF: 0.00138

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Multicentric carpo-tarsal osteolysis with or without nephropathy Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.29
CADD	Benign	19
DANN	Benign	0.91

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: rs532037681; hg19: chr20-39314782;