rs2020870

Variant names:

• chr1-171185820-A-G
• rs2020870
• NM_001460.5:c.107A>G
• FMO2 p.Asp36Gly

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001460.5(FMO2):​c.107A>G​(p.Asp36Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0745 in 1,613,426 control chromosomes in the GnomAD database, including 5,132 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as (no stars).

• Frequency:
  • Genomes: 𝑓 0.073 (452 hom., cov: 32)
  • Exomes 𝑓: 0.075 (4680 hom.)
• Consequence: FMO2 NM_001460.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.29
• Publications: 36 publications found

Genes affected

FMO2 (HGNC:3770): (flavin containing dimethylaniline monoxygenase 2) This gene encodes a flavin-containing monooxygenase family member. It is an NADPH-dependent enzyme that catalyzes the N-oxidation of some primary alkylamines through an N-hydroxylamine intermediate. However, some human populations contain an allele (FMO2*2A) with a premature stop codon, resulting in a protein that is C-terminally-truncated, has no catalytic activity, and is likely degraded rapidly. This gene is found in a cluster with other related family members on chromosome 1. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2014]

FMO1-AS1 (HGNC:40240):

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0027392507).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.125 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001460.5. 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
	FMO2	NM_001460.5	MANE Select	c.107A>G	p.Asp36Gly	missense	Exon 2 of 9	NP_001451.2	Q99518
	FMO2	NM_001365900.2		c.-64+461A>G		intron	N/A	NP_001352829.1
	FMO2	NM_001301347.2		c.-386+461A>G		intron	N/A	NP_001288276.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FMO2	ENST00000209929.10	TSL:1 MANE Select	c.107A>G	p.Asp36Gly	missense	Exon 2 of 9	ENSP00000209929.8	Q99518
	FMO2	ENST00000895514.1		c.107A>G	p.Asp36Gly	missense	Exon 2 of 9	ENSP00000565573.1
	FMO2	ENST00000895513.1		c.107A>G	p.Asp36Gly	missense	Exon 2 of 9	ENSP00000565572.1

Frequencies

GnomAD3 genomes AF: 0.0726 AC: 11042 AN: 152072 Hom.: 452 Cov.: 32

Gnomad AFR AF: 0.0713

Gnomad AMI AF: 0.0417

Gnomad AMR AF: 0.0623

Gnomad ASJ AF: 0.149

Gnomad EAS AF: 0.134

Gnomad SAS AF: 0.128

Gnomad FIN AF: 0.0477

Gnomad MID AF: 0.127

Gnomad NFE AF: 0.0673

Gnomad OTH AF: 0.0716

GnomAD2 exomes AF: 0.0795 AC: 19983 AN: 251384 AF XY: 0.0832

Gnomad AFR exome AF: 0.0685

Gnomad AMR exome AF: 0.0457

Gnomad ASJ exome AF: 0.151

Gnomad EAS exome AF: 0.135

Gnomad FIN exome AF: 0.0485

Gnomad NFE exome AF: 0.0700

Gnomad OTH exome AF: 0.0882

GnomAD4 exome AF: 0.0747 AC: 109211 AN: 1461236 Hom.: 4680 Cov.: 31 AF XY: 0.0768 AC XY: 55794 AN XY: 726922

African (AFR) AF: 0.0693 AC: 2318 AN: 33454

American (AMR) AF: 0.0470 AC: 2100 AN: 44718

Ashkenazi Jewish (ASJ) AF: 0.153 AC: 3990 AN: 26118

East Asian (EAS) AF: 0.123 AC: 4900 AN: 39690

South Asian (SAS) AF: 0.123 AC: 10647 AN: 86226

European-Finnish (FIN) AF: 0.0515 AC: 2749 AN: 53412

Middle Eastern (MID) AF: 0.134 AC: 772 AN: 5750

European-Non Finnish (NFE) AF: 0.0689 AC: 76572 AN: 1111508

Other (OTH) AF: 0.0855 AC: 5163 AN: 60360

GnomAD4 genome AF: 0.0726 AC: 11044 AN: 152190 Hom.: 452 Cov.: 32 AF XY: 0.0729 AC XY: 5423 AN XY: 74402

African (AFR) AF: 0.0713 AC: 2960 AN: 41508

American (AMR) AF: 0.0623 AC: 952 AN: 15284

Ashkenazi Jewish (ASJ) AF: 0.149 AC: 517 AN: 3466

East Asian (EAS) AF: 0.133 AC: 691 AN: 5180

South Asian (SAS) AF: 0.127 AC: 614 AN: 4822

European-Finnish (FIN) AF: 0.0477 AC: 506 AN: 10598

Middle Eastern (MID) AF: 0.129 AC: 38 AN: 294

European-Non Finnish (NFE) AF: 0.0673 AC: 4576 AN: 68010

Other (OTH) AF: 0.0718 AC: 152 AN: 2116

Alfa AF: 0.0740 Hom.: 2121

Bravo AF: 0.0720

Asia WGS AF: 0.117 AC: 405 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.26
BayesDel_addAF	Benign	-0.44	T
BayesDel_noAF	Benign	-0.28
CADD	Uncertain	25
DANN	Uncertain	1.0
Eigen	Uncertain	0.51
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	D
MetaRNN	Benign	0.0027	T
MetaSVM	Benign	-0.45	T
PhyloP100		9.3
PrimateAI	Uncertain	0.64	T
PROVEAN	Pathogenic	-5.8	D
REVEL	Uncertain	0.47
Sift	Uncertain	0.012	D
Sift4G	Uncertain	0.017	D
PromoterAI		-0.036	Neutral
gMVP		0.75
Mutation Taster		=96/4	polymorphism (auto)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs2020870;

hg19: chr1-171154959;

COSMIC: COSV52949867;