16-79599727-G-T

Position:

• chr16-79599727-G-T

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1 PM2 PM5 PP3_Moderate PP5

The NM_005360.5(MAF):​c.176C>A​(p.Pro59His) 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. P59L) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 30)
• Consequence: MAF NM_005360.5 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 8.85

Genes affected

MAF (HGNC:6776): (MAF bZIP transcription factor) The protein encoded by this gene is a DNA-binding, leucine zipper-containing transcription factor that acts as a homodimer or as a heterodimer. Depending on the binding site and binding partner, the encoded protein can be a transcriptional activator or repressor. This protein plays a role in the regulation of several cellular processes, including embryonic lens fiber cell development, increased T-cell susceptibility to apoptosis, and chondrocyte terminal differentiation. Defects in this gene are a cause of juvenile-onset pulverulent cataract as well as congenital cerulean cataract 4 (CCA4). Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2010]

ACMG classification

Verdict is Likely_pathogenic. Variant got 9 ACMG points.

• PM1: In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 2 uncertain in NM_005360.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr16-79599727-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 162516.Status of the report is no_assertion_criteria_provided, 0 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.864
• PP5: Variant 16-79599727-G-T is Pathogenic according to our data. Variant chr16-79599727-G-T is described in ClinVar as [Pathogenic]. Clinvar id is 162515.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr16-79599727-G-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MAF	NM_005360.5	c.176C>A	p.Pro59His	missense_variant	1/2	ENST00000326043.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MAF	ENST00000326043.5	c.176C>A	p.Pro59His	missense_variant	1/2	1	NM_005360.5	A2
MAF	ENST00000569649.1	c.176C>A	p.Pro59His	missense_variant	1/2	5		P4
MAF	ENST00000393350.1	c.176C>A	p.Pro59His	missense_variant	1/1			A2

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Cov.: 36

GnomAD4 genome Cov.: 30

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: no assertion criteria provided

Submissions by phenotype

Ayme-Gripp syndrome Pathogenic:2

Pathogenic, no assertion criteria provided	not provided	Reparto di Fisiopatologia delle Malattie Genetiche, Dipartimento di Ematologia, Oncologia; Istituto Superiore di Sanità	-	- -
Pathogenic, no assertion criteria provided	literature only	OMIM	May 07, 2015	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.15
CADD	Pathogenic	32
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.76	.;.;D
Eigen	Pathogenic	0.76
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.85	T;T;D
M_CAP	Pathogenic	0.99	D
MetaRNN	Pathogenic	0.86	D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Uncertain	2.2	.;M;M
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.95	D
PROVEAN	Pathogenic	-5.0	D;D;D
REVEL	Pathogenic	0.94
Sift	Uncertain	0.0030	D;D;D
Sift4G	Uncertain	0.0020	D;D;D
Polyphen		1.0	.;D;D
Vest4		0.79
MutPred		0.20		Loss of glycosylation at P59 (P = 0.0127);Loss of glycosylation at P59 (P = 0.0127);Loss of glycosylation at P59 (P = 0.0127);
MVP		1.0
ClinPred		0.99	D
GERP RS		4.1
Varity_R		0.72
gMVP		0.79

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: rs727502770; hg19: chr16-79633624;