6-98875649-T-C

Position:

• chr6-98875649-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001278716.2(FBXL4):​c.1468A>G​(p.Lys490Glu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: FBXL4 NM_001278716.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.73

Genes affected

FBXL4 (HGNC:13601): (F-box and leucine rich repeat protein 4) This gene encodes a member of the F-box protein family, which are characterized by an approximately 40 amino acid motif, the F-box. F-box proteins constitute one subunit of modular E3 ubiquitin ligase complexes, called SCF complexes, which function in phosphorylation-dependent ubiquitination. The F-box domain mediates protein-protein interactions and binds directly to S-phase kinase-associated protein 1. In addition to an F-box domain, the encoded protein contains at least 9 tandem leucine-rich repeats. The ubiquitin ligase complex containing the encoded protein may function in cell-cycle control by regulating levels of lysine-specific demethylase 4A. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3260073).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FBXL4	NM_001278716.2	c.1468A>G	p.Lys490Glu	missense_variant	9/10	ENST00000369244.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FBXL4	ENST00000369244.7	c.1468A>G	p.Lys490Glu	missense_variant	9/10	1	NM_001278716.2	P1
FBXL4	ENST00000229971.2	c.1468A>G	p.Lys490Glu	missense_variant	8/9	1		P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000399 AC: 1 AN: 250836 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135566

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 SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000883

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Mitochondrial DNA depletion syndrome 13 Uncertain:1

Uncertain significance, criteria provided, single submitter

reference population

Wong Mito Lab, Molecular and Human Genetics, Baylor College of Medicine

Aug 10, 2017

The NM_012160.4:c.1468A>G (NP_036292.2:p.Lys490Glu) [GRCH38: NC_000006.12:g.98875649T>C] variant in FBXL4 gene is interpretated to be a Uncertain Significance - Insufficient Evidence based on ACMG guidelines (PMID: 25741868). This variant meets one or more of the following evidence codes reported in the ACMG-guideline. PM2:This variant is absent in key population databases. Based on this evidence code ClinGen Pathogenicity Calculator (PMID:28081714) suggested that the variant is Uncertain Significance - Insufficient Evidence. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.80
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.39
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.036	T;T
Eigen	Uncertain	0.20
Eigen_PC	Uncertain	0.36
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.87	.;D
M_CAP	Benign	0.017	T
MetaRNN	Benign	0.33	T;T
MetaSVM	Benign	-0.39	T
MutationAssessor	Benign	0.88	L;L
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.74	T
PROVEAN	Benign	-0.53	N;N
REVEL	Benign	0.22
Sift	Benign	0.055	T;T
Sift4G	Uncertain	0.021	D;D
Polyphen		0.26	B;B
Vest4		0.47
MutPred		0.45		Loss of methylation at K490 (P = 0.0031);Loss of methylation at K490 (P = 0.0031);
MVP		0.37
MPC		0.093
ClinPred		0.70	D
GERP RS		6.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.25
gMVP		0.49

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

Publications

LitVar

Other links and lift over

dbSNP: rs781339281; hg19: chr6-99323525;