22-38214461-C-G

Variant names:

• chr22-38214461-C-G
• rs770292607
• NM_012323.4:c.78C>G

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_012323.4(MAFF):​c.78C>G​(p.Asp26Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000687 in 1,455,946 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: MAFF NM_012323.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.57
• Publications: 0 publications found

Genes affected

MAFF (HGNC:6780): (MAF bZIP transcription factor F) The protein encoded by this gene is a basic leucine zipper (bZIP) transcription factor that lacks a transactivation domain. It is known to bind the US-2 DNA element in the promoter of the oxytocin receptor (OTR) gene and most likely heterodimerizes with other leucine zipper-containing proteins to enhance expression of the OTR gene during term pregnancy. The encoded protein can also form homodimers, and since it lacks a transactivation domain, the homodimer may act as a repressor of transcription. This gene may also be involved in the cellular stress response. Multiple transcript variants encoding two different isoforms have been found for this gene. [provided by RefSeq, Jun 2009]

PLA2G6 (HGNC:9039): (phospholipase A2 group VI) The protein encoded by this gene is an A2 phospholipase, a class of enzyme that catalyzes the release of fatty acids from phospholipids. The encoded protein may play a role in phospholipid remodelling, arachidonic acid release, leukotriene and prostaglandin synthesis, fas-mediated apoptosis, and transmembrane ion flux in glucose-stimulated B-cells. Several transcript variants encoding multiple isoforms have been described, but the full-length nature of only three of them have been determined to date. [provided by RefSeq, Dec 2010]

PLA2G6 Gene-Disease associations (from GenCC):

• neurodegeneration with brain iron accumulation 2A

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Orphanet
• neurodegeneration with brain iron accumulation 2B

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• PLA2G6-associated neurodegeneration

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• autosomal recessive Parkinson disease 14

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.934

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_012323.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MAFF	NM_012323.4	MANE Select	c.78C>G	p.Asp26Glu	missense	Exon 3 of 3	NP_036455.1	Q9ULX9-1
	MAFF	NM_001161572.2		c.78C>G	p.Asp26Glu	missense	Exon 3 of 3	NP_001155044.1	Q9ULX9-1
	MAFF	NM_001161573.1		c.78C>G	p.Asp26Glu	missense	Exon 3 of 3	NP_001155045.1	Q9ULX9-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MAFF	ENST00000338483.7	TSL:1 MANE Select	c.78C>G	p.Asp26Glu	missense	Exon 3 of 3	ENSP00000345393.2	Q9ULX9-1
	MAFF	ENST00000407965.2	TSL:2	c.78C>G	p.Asp26Glu	missense	Exon 3 of 3	ENSP00000384094.1
	MAFF	ENST00000417948.6	TSL:4	c.78C>G	p.Asp26Glu	missense	Exon 3 of 3	ENSP00000416493.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.87e-7 AC: 1 AN: 1455946 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 724172

African (AFR) AF: 0.00 AC: 0 AN: 33348

American (AMR) AF: 0.00 AC: 0 AN: 44560

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26044

East Asian (EAS) AF: 0.00 AC: 0 AN: 39546

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86022

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50156

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5752

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1110284

Other (OTH) AF: 0.00 AC: 0 AN: 60234

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.87	D
Eigen	Uncertain	0.30
Eigen_PC	Benign	0.16
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Benign	0.76	T
M_CAP	Pathogenic	0.50	D
MetaRNN	Pathogenic	0.93	D
MetaSVM	Uncertain	0.68	D
MutationAssessor	Uncertain	2.8	M
PhyloP100		1.6
PROVEAN	Uncertain	-3.8	D
REVEL	Pathogenic	0.81
Sift	Benign	0.057	T
Sift4G	Uncertain	0.034	D
Polyphen		1.0	D
Vest4		0.76
MutPred		0.80		Loss of catalytic residue at D26 (P = 0.0891)
MVP		0.99
MPC		2.5
ClinPred		1.0	D
GERP RS		-0.13
PromoterAI		0.0033	Neutral
Varity_R		0.61
gMVP		0.76
Mutation Taster		=24/76	disease causing

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: rs770292607; hg19: chr22-38610468;