5-148399066-C-T

Variant names:

• chr5-148399066-C-T
• NM_205836.3:c.196C>T
• FBXO38 p.Leu66Leu

Variant summary

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

The NM_205836.3(FBXO38):​c.196C>T​(p.Leu66Leu) variant causes a synonymous 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. L66L) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FBXO38 NM_205836.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.03
• Publications: 0 publications found

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]

FBXO38 Gene-Disease associations (from GenCC):

• neuronopathy, distal hereditary motor, type 2D

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• distal hereditary motor neuropathy

  Inheritance: AD Classification: MODERATE Submitted by: ClinGen
• distal hereditary motor neuropathy type 2

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

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 (BayesDel_noAF=-0.36).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_205836.3. 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
	FBXO38	NM_205836.3	MANE Select	c.196C>T	p.Leu66Leu	synonymous	Exon 3 of 22	NP_995308.1	Q6PIJ6-1
	FBXO38	NM_030793.5		c.196C>T	p.Leu66Leu	synonymous	Exon 3 of 22	NP_110420.3
	FBXO38	NM_001271723.2		c.196C>T	p.Leu66Leu	synonymous	Exon 3 of 21	NP_001258652.1	Q6PIJ6-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FBXO38	ENST00000340253.10	TSL:5 MANE Select	c.196C>T	p.Leu66Leu	synonymous	Exon 3 of 22	ENSP00000342023.6	Q6PIJ6-1
	FBXO38	ENST00000394370.7	TSL:1	c.196C>T	p.Leu66Leu	synonymous	Exon 3 of 22	ENSP00000377895.3	Q6PIJ6-2
	FBXO38	ENST00000513826.1	TSL:1	c.196C>T	p.Leu66Leu	synonymous	Exon 2 of 20	ENSP00000426410.1	Q6PIJ6-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.36
CADD	Benign	8.0
DANN	Benign	0.90
PhyloP100		3.0

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

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

Other links and lift over

hg19: chr5-147778629;