5-148394798-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_205836.3(FBXO38):c.22G>A(p.Val8Met) 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. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: FBXO38 NM_205836.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.62

Genes affected

FBXO38 (HGNC:28844): (F-box protein 38) This gene encodes a large protein that contains an F-box domain and may participate in protein ubiquitination. The encoded protein is a transcriptional co-activator of Krueppel-like factor 7 (Klf7). A heterozygous mutation in this gene was found in individuals with autosomal dominant distal hereditary motor neuronopathy type IID. There is a pseudogene for this gene on chromosome 4. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2013]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, FBXO38
• BP4: Computational evidence support a benign effect (MetaRNN=0.22975716).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FBXO38	NM_205836.3	c.22G>A	p.Val8Met	missense_variant	2/22	ENST00000340253.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FBXO38	ENST00000340253.10	c.22G>A	p.Val8Met	missense_variant	2/22	5	NM_205836.3	P3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Distal hereditary motor neuropathy type 2 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jul 26, 2022

This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 8 of the FBXO38 protein (p.Val8Met). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with FBXO38-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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	0.087
BayesDel_addAF	Benign	-0.065	T
BayesDel_noAF	Benign	-0.33
Cadd	Uncertain	24
Dann	Uncertain	1.0
Eigen	Uncertain	0.46
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Benign	0.72	D
LIST_S2	Uncertain	0.87	D;D;D;.
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.23	T;T;T;T
MetaSVM	Benign	-0.88	T
MutationAssessor	Benign	1.8	L;L;L;L
MutationTaster	Benign	0.52	D;D;D;D
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-0.94	N;N;N;N
REVEL	Benign	0.10
Sift	Uncertain	0.010	D;D;D;D
Sift4G	Uncertain	0.020	D;D;D;D
Polyphen		0.97	D;D;P;D
Vest4		0.39
MutPred		0.31		Gain of disorder (P = 0.012);Gain of disorder (P = 0.012);Gain of disorder (P = 0.012);Gain of disorder (P = 0.012);
MVP		0.26
MPC		1.4
ClinPred		0.83	D
GERP RS		5.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.12
gMVP		0.21

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr5-147774361;