17-28547306-C-G

Variant names:

• chr17-28547306-C-G
• NM_005148.4:c.714G>C
• UNC119 p.Gly238Gly

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_005148.4(UNC119):​c.714G>C​(p.Gly238Gly) 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. G238G) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: UNC119 NM_005148.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.234
• Publications: 0 publications found

Genes affected

UNC119 (HGNC:12565): (unc-119 lipid binding chaperone) This gene is specifically expressed in the photoreceptors in the retina. The encoded product shares strong homology with the C. elegans unc119 protein and it can functionally complement the C. elegans unc119 mutation. It has been localized to the photoreceptor synapses in the outer plexiform layer of the retina, and suggested to play a role in the mechanism of photoreceptor neurotransmitter release through the synaptic vesicle cycle. Two transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Jul 2008]

RSKR (HGNC:26314): (ribosomal protein S6 kinase related) Predicted to enable protein kinase activity. Predicted to be involved in protein phosphorylation. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.47).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005148.4. 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
	UNC119	NM_005148.4	MANE Select	c.714G>C	p.Gly238Gly	synonymous	Exon 5 of 5	NP_005139.1	Q13432-1
	UNC119	NM_001330166.2		c.429G>C	p.Gly143Gly	synonymous	Exon 6 of 6	NP_001317095.1	K7EN86
	UNC119	NM_054035.2		c.*318G>C		3_prime_UTR	Exon 4 of 4	NP_473376.1	Q13432-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	UNC119	ENST00000335765.9	TSL:1 MANE Select	c.714G>C	p.Gly238Gly	synonymous	Exon 5 of 5	ENSP00000337040.3	Q13432-1
	UNC119	ENST00000301032.8	TSL:1	c.*318G>C		3_prime_UTR	Exon 4 of 4	ENSP00000301032.4	Q13432-2
	UNC119	ENST00000470125.5	TSL:1	c.*318G>C		3_prime_UTR	Exon 3 of 3	ENSP00000465323.1	K7EJU3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.47
CADD	Benign	7.1
DANN	Benign	0.74
PhyloP100		0.23
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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: chr17-26874324;