NM_005461.5:c.208T>G

Variant names:

• chr20-40688643-A-C
• rs387907005
• NM_005461.5:c.208T>G

Variant summary

Our verdict is Likely pathogenic. The variant received 9 ACMG points: 9P and 0B. PM1 PM2 PM5 PP3_Moderate PP5

The NM_005461.5(MAFB):​c.208T>G​(p.Ser70Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S70L) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: MAFB NM_005461.5 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.15
• Publications: 5 publications found

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]

MAFB Gene-Disease associations (from GenCC):

• multicentric carpo-tarsal osteolysis with or without nephropathy

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
• Duane retraction syndrome

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, G2P
• Duane retraction syndrome 3 with or without deafness

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P

ACMG classification

Our verdict: Likely_pathogenic. The variant received 9 ACMG points.

• PM1: In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_005461.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr20-40688642-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 30770.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.845
• PP5: Variant 20-40688643-A-C is Pathogenic according to our data. Variant chr20-40688643-A-C is described in ClinVar as [Pathogenic]. Clinvar id is 30769.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MAFB	NM_005461.5	c.208T>G	p.Ser70Ala	missense_variant	Exon 1 of 1	ENST00000373313.3	NP_005452.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MAFB	ENST00000373313.3	c.208T>G	p.Ser70Ala	missense_variant	Exon 1 of 1	6	NM_005461.5	ENSP00000362410.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Alfa AF: 0.000554 Hom.: 0

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

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

Mar 09, 2012

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.90
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.34
CADD	Pathogenic	32
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.66	D
Eigen	Pathogenic	0.74
Eigen_PC	Pathogenic	0.67
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.93	D
M_CAP	Pathogenic	0.84	D
MetaRNN	Pathogenic	0.84	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Uncertain	2.7	M
PhyloP100		9.2
PrimateAI	Pathogenic	0.86	D
PROVEAN	Benign	-2.1	N
REVEL	Pathogenic	0.73
Sift	Benign	0.032	D
Sift4G	Uncertain	0.058	T
Polyphen		0.98	D
Vest4		0.84
MutPred		0.21		Loss of glycosylation at S70 (P = 0.0038);
MVP		0.97
ClinPred		0.95	D
GERP RS		4.6
Varity_R		0.21
gMVP		0.90
Mutation Taster		=8/92	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs387907005; hg19: chr20-39317283;