17-6589800-T-C

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2BP4_ModerateBS1_Supporting

The NM_014804.3(KIAA0753):c.2765A>G(p.Asn922Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000528 in 1,610,488 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00024 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000034 ( 0 hom. )

Consequence

KIAA0753
NM_014804.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 5.22

Variant links:

Genes affected

KIAA0753 (HGNC:29110): (KIAA0753) This gene encodes a subunit of a protein complex that regulates ciliogenesis and cilia maintenance. The encoded protein has also been shown to regulate centriolar duplication. Mutations in this gene cause an orofaciodigital syndrome and a form of Joubert syndrome in human patients. [provided by RefSeq, May 2017]

KIAA0753 links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.23841855).

BS1

Variant frequency is greater than expected in population afr. gnomad4_exome allele frequency = 0.0000336 (49/1458192) while in subpopulation AFR AF= 0.000813 (27/33212). AF 95% confidence interval is 0.000574. There are 0 homozygotes in gnomad4_exome. There are 26 alleles in male gnomad4_exome subpopulation. Median coverage is 31. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KIAA0753	NM_014804.3 linkuse as main transcript	c.2765A>G	p.Asn922Ser	missense_variant	18/19	ENST00000361413.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KIAA0753	ENST00000361413.8 linkuse as main transcript	c.2765A>G	p.Asn922Ser	missense_variant	18/19	1	NM_014804.3	P1	Q2KHM9-1

Frequencies

GnomAD3 genomes

AF:

0.000230

AC:

AN:

152178

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000628

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000856

AC:

AN:

245346

Hom.:

AF XY:

0.0000976

AC XY:

AN XY:

133130

show subpopulations

Gnomad AFR exome

AF:

0.000780

Gnomad AMR exome

AF:

0.000180

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000336

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000179

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000336

AC:

AN:

1458192

Hom.:

Cov.:

AF XY:

0.0000358

AC XY:

AN XY:

725356

show subpopulations

Gnomad4 AFR exome

AF:

0.000813

Gnomad4 AMR exome

AF:

0.000160

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000117

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000630

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.000236

AC:

AN:

152296

Hom.:

Cov.:

AF XY:

0.000295

AC XY:

AN XY:

74472

show subpopulations

Gnomad4 AFR

AF:

0.000650

Gnomad4 AMR

AF:

0.000392

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000666

Hom.:

Bravo

AF:

0.000257

ESP6500AA

AF:

0.000780

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000827

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.0000596

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 15, 2023

The c.2765A>G (p.N922S) alteration is located in exon 18 (coding exon 17) of the KIAA0753 gene. This alteration results from a A to G substitution at nucleotide position 2765, causing the asparagine (N) at amino acid position 922 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Oct 31, 2022

This sequence change replaces asparagine, which is neutral and polar, with serine, which is neutral and polar, at codon 922 of the KIAA0753 protein (p.Asn922Ser). This variant is present in population databases (rs199627553, gnomAD 0.08%). This variant has not been reported in the literature in individuals affected with KIAA0753-related conditions. 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 C15"). 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

Benign

0.12

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.34

Cadd

Benign

Dann

Uncertain

1.0

DEOGEN2

Benign

0.089

T;T;.

Eigen

Pathogenic

0.73

Eigen_PC

Pathogenic

0.71

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.84

T;T;T

M_CAP

Benign

0.014

MetaRNN

Benign

0.24

T;T;T

MetaSVM

Benign

-0.69

MutationTaster

Benign

0.98

D;D;D;D

PrimateAI

Uncertain

0.61

Sift4G

Pathogenic

0.0

D;T;D

Polyphen

1.0

.;D;.

Vest4

0.64, 0.65

MVP

0.45

MPC

0.39

ClinPred

0.32

GERP RS

5.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.29

gMVP

0.43

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over