1-154983830-T-C

Variant names:

• chr1-154983830-T-C
• rs2102235774
• NM_025207.5:c.136T>C

Variant summary

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

The NM_025207.5(FLAD1):​c.136T>C​(p.Trp46Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: FLAD1 NM_025207.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0960
• Publications: 0 publications found

Genes affected

FLAD1 (HGNC:24671): (flavin adenine dinucleotide synthetase 1) This gene encodes the enzyme that catalyzes adenylation of flavin mononucleotide (FMN) to form flavin adenine dinucleotide (FAD) coenzyme. Alternatively spliced transcript variants encoding distinct isoforms have been observed. [provided by RefSeq, Jul 2008]

FLAD1 Gene-Disease associations (from GenCC):

• myopathy with abnormal lipid metabolism

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: PanelApp Australia, ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P

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=0.105784535).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FLAD1	NM_025207.5	c.136T>C	p.Trp46Arg	missense_variant	Exon 1 of 7	ENST00000292180.8	NP_079483.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FLAD1	ENST00000292180.8	c.136T>C	p.Trp46Arg	missense_variant	Exon 1 of 7	1	NM_025207.5	ENSP00000292180.3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Apr 27, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces tryptophan with arginine at codon 46 of the FLAD1 protein (p.Trp46Arg). The tryptophan residue is weakly conserved and there is a moderate physicochemical difference between tryptophan and arginine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with FLAD1-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The arginine amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.22
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	19
DANN	Benign	0.93
DEOGEN2	Benign	0.012	T;T
Eigen	Benign	-0.59
Eigen_PC	Benign	-0.47
FATHMM_MKL	Benign	0.63	D
LIST_S2	Benign	0.30	T;T
M_CAP	Benign	0.0054	T
MetaRNN	Benign	0.11	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.55	.;N
PhyloP100		0.096
PrimateAI	Benign	0.46	T
PROVEAN	Benign	-0.040	N;N
REVEL	Benign	0.056
Sift	Uncertain	0.0070	D;D
Polyphen		0.0010	.;B
Vest4		0.18
MutPred		0.51		Gain of disorder (P = 0.0216);Gain of disorder (P = 0.0216);
MVP		0.34
MPC		0.39
ClinPred		0.50	D
GERP RS		0.29
PromoterAI		0.13	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.097
gMVP		0.28
Mutation Taster		=95/5	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs2102235774; hg19: chr1-154956306;