22-42640190-C-A

Variant names:

• chr22-42640190-C-A
• rs577533684
• NM_001165877.1:c.85G>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001165877.1(ATP5MGL):​c.85G>T​(p.Ala29Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00000206 in 1,457,652 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A29T) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: ATP5MGL NM_001165877.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.69
• Publications: 2 publications found

Genes affected

ATP5MGL (HGNC:13213): (ATP synthase membrane subunit g like) Predicted to enable proton transmembrane transporter activity. Predicted to be involved in ATP synthesis coupled proton transport. Located in mitochondrion. [provided by Alliance of Genome Resources, Apr 2022]

CYB5R3 (HGNC:2873): (cytochrome b5 reductase 3) This gene encodes cytochrome b5 reductase, which includes a membrane-bound form in somatic cells (anchored in the endoplasmic reticulum, mitochondrial and other membranes) and a soluble form in erythrocytes. The membrane-bound form exists mainly on the cytoplasmic side of the endoplasmic reticulum and functions in desaturation and elongation of fatty acids, in cholesterol biosynthesis, and in drug metabolism. The erythrocyte form is located in a soluble fraction of circulating erythrocytes and is involved in methemoglobin reduction. The membrane-bound form has both membrane-binding and catalytic domains, while the soluble form has only the catalytic domain. Alternate splicing results in multiple transcript variants. Mutations in this gene cause methemoglobinemias. [provided by RefSeq, Jan 2010]

CYB5R3 Gene-Disease associations (from GenCC):

• methemoglobinemia

  Inheritance: AR Classification: DEFINITIVE Submitted by: Illumina
• methemoglobinemia due to deficiency of methemoglobin reductase

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, ClinGen, Labcorp Genetics (formerly Invitae)
• hereditary methemoglobinemia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.08633804).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001165877.1. 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
	ATP5MGL	NM_001165877.1	MANE Select	c.85G>T	p.Ala29Ser	missense	Exon 1 of 1	NP_001159349.1	Q7Z4Y8
	CYB5R3	NM_000398.7	MANE Select	c.22-3344G>T		intron	N/A	NP_000389.1	P00387-1
	CYB5R3	NM_001171660.2		c.121-3344G>T		intron	N/A	NP_001165131.1	P00387-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATP5MGL	ENST00000505920.1	TSL:6 MANE Select	c.85G>T	p.Ala29Ser	missense	Exon 1 of 1	ENSP00000421076.1	Q7Z4Y8
	CYB5R3	ENST00000352397.10	TSL:1 MANE Select	c.22-3344G>T		intron	N/A	ENSP00000338461.6	P00387-1
	CYB5R3	ENST00000407332.6	TSL:1	c.22-3344G>T		intron	N/A	ENSP00000384457.2	A0A8J8Z3C6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000407 AC: 1 AN: 245514 AF XY: 0.00000752

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000206 AC: 3 AN: 1457652 Hom.: 0 Cov.: 31 AF XY: 0.00000414 AC XY: 3 AN XY: 725134

African (AFR) AF: 0.00 AC: 0 AN: 33422

American (AMR) AF: 0.00 AC: 0 AN: 44460

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26102

East Asian (EAS) AF: 0.00 AC: 0 AN: 39614

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 85920

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51068

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111010

Other (OTH) AF: 0.00 AC: 0 AN: 60288

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.090
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.54
CADD	Benign	7.6
DANN	Benign	0.87
DEOGEN2	Benign	0.0050	T
Eigen	Benign	-0.82
Eigen_PC	Benign	-0.89
FATHMM_MKL	Benign	0.29	N
LIST_S2	Benign	0.54	T
M_CAP	Benign	0.0015	T
MetaRNN	Benign	0.086	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-1.1	N
PhyloP100		3.7
PrimateAI	Benign	0.34	T
PROVEAN	Benign	0.68	N
REVEL	Benign	0.10
Sift	Benign	0.11	T
Sift4G	Benign	0.20	T
Vest4		0.086
MutPred		0.44		Loss of stability (P = 0.0573)
MVP		0.095
MPC		0.0076
ClinPred		0.075	T
GERP RS		-0.29
PromoterAI		0.0086	Neutral
Varity_R		0.032
gMVP		0.59
Mutation Taster		=93/7	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs577533684; hg19: chr22-43036196;