1-147187022-G-C

Variant names:

• chr1-147187022-G-C
• rs150439781
• NM_001461.4:c.1480C>G

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_001461.4(FMO5):​c.1480C>G​(p.Arg494Gly) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,736 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 variant affecting the same amino acid position, but resulting in a different missense (i.e. R494C) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: FMO5 NM_001461.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.46
• Publications: 0 publications found

Genes affected

FMO5 (HGNC:3773): (flavin containing dimethylaniline monoxygenase 5) Metabolic N-oxidation of the diet-derived amino-trimethylamine (TMA) is mediated by flavin-containing monooxygenase and is subject to an inherited FMO3 polymorphism in man resulting in a small subpopulation with reduced TMA N-oxidation capacity resulting in fish odor syndrome Trimethylaminuria. Three forms of the enzyme, FMO1 found in fetal liver, FMO2 found in adult liver, and FMO3 are encoded by genes clustered in the 1q23-q25 region. Flavin-containing monooxygenases are NADPH-dependent flavoenzymes that catalyzes the oxidation of soft nucleophilic heteroatom centers in drugs, pesticides, and xenobiotics. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2009]

CHD1L (HGNC:1916): (chromodomain helicase DNA binding protein 1 like) This gene encodes a DNA helicase protein involved in DNA repair. The protein converts ATP to add poly(ADP-ribose) as it regulates chromatin relaxation following DNA damage. Overexpression of this gene has been linked to several types of cancers. [provided by RefSeq, Feb 2017]

CHD1L Gene-Disease associations (from GenCC):

• congenital anomaly of kidney and urinary tract

  Inheritance: Unknown Classification: LIMITED Submitted by: ClinGen

ENSG00000237188 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.986

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001461.4. 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
	FMO5	NM_001461.4	MANE Select	c.1480C>G	p.Arg494Gly	missense	Exon 9 of 9	NP_001452.2	P49326-1
	FMO5	NM_001144830.3		c.*269C>G		3_prime_UTR	Exon 7 of 7	NP_001138302.1	P49326-2
	CHD1L	NM_001348451.2		c.-90+12437G>C		intron	N/A	NP_001335380.1	A0A0A0MSH9

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FMO5	ENST00000254090.9	TSL:1 MANE Select	c.1480C>G	p.Arg494Gly	missense	Exon 9 of 9	ENSP00000254090.4	P49326-1
	FMO5	ENST00000369272.7	TSL:1	c.*269C>G		3_prime_UTR	Exon 7 of 7	ENSP00000358277.3	P49326-2
	FMO5	ENST00000441068.6	TSL:1	c.1257-2392C>G		intron	N/A	ENSP00000416011.2	P49326-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461736 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727188

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39680

South Asian (SAS) AF: 0.00 AC: 0 AN: 86250

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111900

Other (OTH) AF: 0.00 AC: 0 AN: 60388

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.76
BayesDel_addAF	Pathogenic	0.34	D
BayesDel_noAF	Pathogenic	0.25
CADD	Pathogenic	27
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.050	T
Eigen	Pathogenic	0.86
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.97	D
M_CAP	Uncertain	0.14	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Uncertain	0.088	D
MutationAssessor	Pathogenic	3.4	M
PhyloP100		4.5
PrimateAI	Benign	0.36	T
PROVEAN	Pathogenic	-6.0	D
REVEL	Pathogenic	0.72
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0030	D
Polyphen		1.0	D
Vest4		0.86
MutPred		0.91		Loss of MoRF binding (P = 0.0116)
MVP		0.81
MPC		0.24
ClinPred		1.0	D
GERP RS		5.8
Varity_R		0.82
gMVP		0.80
Mutation Taster		=9/91	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: rs150439781; hg19: chr1-146658601; COSMIC: COSV54209665;