16-730641-C-G

Variant names:

• chr16-730641-C-G
• rs774640747
• NM_022493.3:c.1207G>C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_022493.3(CIAO3):​c.1207G>C​(p.Gly403Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000206 in 1,456,954 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: CIAO3 NM_022493.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.02

Genes affected

CIAO3 (HGNC:14179): (cytosolic iron-sulfur assembly component 3) Predicted to enable 4 iron, 4 sulfur cluster binding activity. Involved in several processes, including iron-sulfur cluster assembly; oxygen homeostasis; and response to hypoxia. Part of CIA complex. [provided by Alliance of Genome Resources, Apr 2022]

HAGHL (HGNC:14177): (hydroxyacylglutathione hydrolase like) Predicted to enable hydroxyacylglutathione hydrolase activity and metal ion binding activity. Predicted to be involved in methylglyoxal catabolic process to D-lactate via S-lactoyl-glutathione. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.951

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CIAO3	NM_022493.3	c.1207G>C	p.Gly403Arg	missense_variant	Exon 11 of 11	ENST00000251588.7	NP_071938.1
CIAO3	NM_001304799.2	c.901G>C	p.Gly301Arg	missense_variant	Exon 12 of 12		NP_001291728.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CIAO3	ENST00000251588.7	c.1207G>C	p.Gly403Arg	missense_variant	Exon 11 of 11	1	NM_022493.3	ENSP00000251588.2

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 0.00000206 AC: 3 AN: 1456954 Hom.: 0 Cov.: 32 AF XY: 0.00000276 AC XY: 2 AN XY: 724978

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.59
BayesDel_addAF	Pathogenic	0.29	D
BayesDel_noAF	Pathogenic	0.17
CADD	Uncertain	25
DANN	Benign	0.94
DEOGEN2	Uncertain	0.77	D;.;.
Eigen	Uncertain	0.30
Eigen_PC	Benign	0.088
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.89	D;.;D
M_CAP	Uncertain	0.14	D
MetaRNN	Pathogenic	0.95	D;D;D
MetaSVM	Uncertain	-0.17	T
PrimateAI	Uncertain	0.57	T
PROVEAN	Pathogenic	-6.5	D;D;D
REVEL	Uncertain	0.50
Sift	Pathogenic	0.0	D;T;T
Sift4G	Benign	0.21	T;T;T
Polyphen		1.0	D;.;.
Vest4		0.83
MutPred		0.80		Gain of methylation at G403 (P = 0.0575);.;.;
MVP		0.68
MPC		0.75
ClinPred		0.99	D
GERP RS		4.4
Varity_R		0.84
gMVP		0.93

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

LitVar

Other links and lift over

dbSNP: rs774640747; hg19: chr16-780641;