14-73950113-C-G

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The ENST00000554341.6(COQ6):c.21C>G(p.Pro7=) variant causes a synonymous, NMD transcript 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: 33)
• Consequence: COQ6 ENST00000554341.6 synonymous, NMD_transcript
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.27

Genes affected

COQ6 (HGNC:20233): (coenzyme Q6, monooxygenase) The protein encoded by this gene belongs to the ubiH/COQ6 family. It is an evolutionarily conserved monooxygenase required for the biosynthesis of coenzyme Q10 (or ubiquinone), which is an essential component of the mitochondrial electron transport chain, and one of the most potent lipophilic antioxidants implicated in the protection of cell damage by reactive oxygen species. Knockdown of this gene in mouse and zebrafish results in decreased growth due to increased apoptosis. Mutations in this gene are associated with autosomal recessive coenzyme Q10 deficiency-6 (COQ10D6), which manifests as nephrotic syndrome with sensorineural deafness. Alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Jun 2012]

FAM161B (HGNC:19854): (FAM161 centrosomal protein B) Predicted to be involved in cilium organization. Located in cytoplasmic microtubule. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.11254686).
• BP7: Synonymous conserved (PhyloP=1.27 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FAM161B	NM_152445.3			upstream_gene_variant		ENST00000286544.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COQ6	ENST00000554341.6	c.21C>G	p.Pro7=	synonymous_variant, NMD_transcript_variant	1/11	1
FAM161B	ENST00000651776.1	c.103G>C	p.Gly35Arg	missense_variant	1/9
COQ6	ENST00000394026.8	c.21C>G	p.Pro7=	synonymous_variant	1/12	2
FAM161B	ENST00000286544.5			upstream_gene_variant		1	NM_152445.3	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 08, 2024

The c.103G>C (p.G35R) alteration is located in exon 1 (coding exon 1) of the FAM161B gene. This alteration results from a G to C substitution at nucleotide position 103, causing the glycine (G) at amino acid position 35 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
Cadd	Benign	5.9
Dann	Uncertain	0.99
Eigen	Benign	-0.42
Eigen_PC	Benign	-0.31
FATHMM_MKL	Uncertain	0.82	D
LIST_S2	Benign	0.43	T
M_CAP	Benign	0.032	D
MetaRNN	Benign	0.11	T
MetaSVM	Benign	-1.1	T
MutationTaster	Benign	1.0	D;D;D;N
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-0.30	N
REVEL	Benign	0.060
Sift	Benign	0.85	T
Vest4		0.38
MutPred		0.23		Loss of ubiquitination at K31 (P = 0.0246);
MVP		0.19
MPC		0.073
ClinPred		0.39	T
GERP RS		4.5

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr14-74416816;