rs756830714

Variant names:

• chr17-15999855-C-A
• NM_017775.4:c.7C>A

Your query was ambiguous. Multiple possible variants found:

• chr17-15999855-C-A
• chr17-15999855-C-G
• chr17-15999855-C-T

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_017775.4(TTC19):​c.7C>A​(p.Arg3Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000734 in 1,362,824 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. R3R) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.3e-7 (0 hom.)
• Consequence: TTC19 NM_017775.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.514

Genes affected

TTC19 (HGNC:26006): (tetratricopeptide repeat domain 19) This gene encodes a protein with a tetratricopeptide repeat (TPR) domain containing several TPRs of about 34 aa each. These repeats are found in a variety of organisms including bacteria, fungi and plants, and are involved in a variety of functions including protein-protein interactions. This protein is embedded in the inner mitochondrial membrane and is involved in the formation of the mitochondrial respiratory chain III. It has also been suggested that this protein plays a role in cytokinesis. Mutations in this gene cause mitochondrial complex III deficiency. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Sep 2012]

ZSWIM7 (HGNC:26993): (zinc finger SWIM-type containing 7) Predicted to enable zinc ion binding activity. Involved in double-strand break repair via homologous recombination and protein stabilization. Part of Shu complex. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.61).
• BP7: Synonymous conserved (PhyloP=0.514 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TTC19	NM_017775.4	c.7C>A	p.Arg3Arg	synonymous_variant	Exon 1 of 10	ENST00000261647.10	NP_060245.3
ZSWIM7	NM_001042697.2	c.-261G>T		upstream_gene_variant		ENST00000399277.6	NP_001036162.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TTC19	ENST00000261647.10	c.7C>A	p.Arg3Arg	synonymous_variant	Exon 1 of 10	1	NM_017775.4	ENSP00000261647.5
ZSWIM7	ENST00000399277.6	c.-261G>T		upstream_gene_variant		1	NM_001042697.2	ENSP00000382218.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.34e-7 AC: 1 AN: 1362824 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 671918

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000294

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.61
CADD	Benign	7.7
DANN	Benign	0.73
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8

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: chr17-15903169;