rs746136288

Variant names:

• chr14-58432412-A-G
• rs746136288
• NM_001329943.3:c.365A>G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001329943.3(KIAA0586):​c.365A>G​(p.Tyr122Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000141 in 1,415,554 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: KIAA0586 NM_001329943.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 1.88

Genes affected

KIAA0586 (HGNC:19960): (KIAA0586) This gene encodes a conserved centrosomal protein that functions in ciliogenesis and responds to hedgehog signaling. Mutations in this gene causes Joubert syndrome 23. Alternative splicing results in multiple transcript variants and protein isoforms. [provided by RefSeq, Aug 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KIAA0586	NM_001329943.3	c.365A>G	p.Tyr122Cys	missense_variant	Exon 4 of 31	ENST00000652326.2	NP_001316872.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KIAA0586	ENST00000652326.2	c.365A>G	p.Tyr122Cys	missense_variant	Exon 4 of 31		NM_001329943.3	ENSP00000498929.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000461 AC: 1 AN: 217056 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 118410

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000386

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000141 AC: 2 AN: 1415554 Hom.: 0 Cov.: 25 AF XY: 0.00000142 AC XY: 1 AN XY: 704078

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000546

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000828 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Dec 28, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.365A>G (p.Y122C) alteration is located in exon 4 (coding exon 4) of the KIAA0586 gene. This alteration results from a A to G substitution at nucleotide position 365, causing the tyrosine (Y) at amino acid position 122 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided Uncertain:1

Nov 15, 2022

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Joubert syndrome 23;C4225286:Short-rib thoracic dysplasia 14 with polydactyly Uncertain:1

Jul 21, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces tyrosine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 134 of the KIAA0586 protein (p.Tyr134Cys). This variant is present in population databases (rs746136288, gnomAD 0.004%). This variant has not been reported in the literature in individuals affected with KIAA0586-related conditions. ClinVar contains an entry for this variant (Variation ID: 542187). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.58
BayesDel_addAF	Uncertain	0.014	T
BayesDel_noAF	Benign	-0.10
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.30	.;.;T;D;.;T;T;.
Eigen	Benign	0.18
Eigen_PC	Benign	0.074
FATHMM_MKL	Benign	0.72	D
LIST_S2	Uncertain	0.91	D;D;D;D;.;D;D;D
M_CAP	Uncertain	0.13	D
MetaRNN	Uncertain	0.51	D;D;D;D;D;D;D;D
MetaSVM	Uncertain	-0.091	T
MutationAssessor	Uncertain	2.4	.;.;.;M;.;.;.;.
PrimateAI	Uncertain	0.62	T
PROVEAN	Pathogenic	-5.5	D;.;.;.;D;D;D;D
REVEL	Benign	0.27
Sift	Uncertain	0.0010	D;.;.;.;D;D;D;D
Sift4G	Pathogenic	0.0010	D;D;D;D;D;D;D;D
Polyphen		0.99	.;.;.;D;.;.;.;.
Vest4		0.69
MutPred		0.45		.;.;.;Gain of catalytic residue at M109 (P = 0.0529);.;.;.;.;
MVP		0.81
MPC		0.16
ClinPred		0.98	D
GERP RS		2.8
Varity_R		0.43
gMVP		0.17

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: rs746136288; hg19: chr14-58899130;