dbSNP rs1060502832: DNAAF3:p.Arg162Leu (chr19-55161821-C-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_001256715.2(DNAAF3):c.485G>T(p.Arg162Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000078 in 1,282,656 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: 7.8e-7 ( 0 hom. )

Consequence

DNAAF3
NM_001256715.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.53

Variant links:

Genes affected

DNAAF3 (HGNC:30492): (dynein axonemal assembly factor 3) The protein encoded by this gene is required for the assembly of axonemal inner and outer dynein arms and plays a role in assembling dynein complexes for transport into cilia. Defects in this gene are a cause of primary ciliary dyskinesia type 2 (CILD2). Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2012]

DNAAF3 links:

DNAAF3-AS1 (HGNC:55292): (DNAAF3 antisense RNA 1)

DNAAF3-AS1 links:

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ACMG classification

Classification made for transcript

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
DNAAF3	NM_001256715.2 link	c.485G>T	p.Arg162Leu	missense_variant	Exon 6 of 12	ENST00000524407.7	NP_001243644.1	Q8N9W5-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNAAF3	ENST00000524407.7 link	c.485G>T	p.Arg162Leu	missense_variant	Exon 6 of 12	1	NM_001256715.2	ENSP00000432046.3		Q8N9W5-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

7.80e-7

AC:

AN:

1282656

Hom.:

Cov.:

AF XY:

0.00000160

AC XY:

AN XY:

623062

show subpopulations

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:

0.0000154

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Primary ciliary dyskinesia

Uncertain:1

Mar 13, 2018

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine with leucine at codon 230 of the DNAAF3 protein (p.Arg230Leu). The arginine residue is moderately conserved and there is a moderate physicochemical difference between arginine and leucine. While this variant is not present in population databases, the frequency information is unreliable, as metrics indicate poor data quality at this position in the ExAC database. This variant has not been reported in the literature in an individual with a DNAAF3-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies. In summary, this variant is a novel missense change that is not predicted to affect protein function. There is no indication that it causes disease, but the available evidence is currently insufficient to prove that conclusively. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.77

BayesDel_addAF

Benign

-0.044

BayesDel_noAF

Benign

-0.30

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.032

.;T;.;.

Eigen

Uncertain

0.25

Eigen_PC

Benign

0.15

FATHMM_MKL

Benign

0.74

LIST_S2

Benign

0.84

T;T;T;T

M_CAP

Benign

0.075

MetaRNN

Uncertain

0.50

T;T;T;T

MetaSVM

Benign

-0.91

MutationAssessor

Uncertain

2.3

.;M;.;.

PrimateAI

Pathogenic

0.84

PROVEAN

Uncertain

-4.4

D;.;.;D

REVEL

Benign

0.20

Sift

Benign

0.061

T;.;.;D

Sift4G

Uncertain

0.0090

D;D;D;D

Polyphen

0.97

.;D;.;.

Vest4

0.60

MutPred

0.34

.;Loss of MoRF binding (P = 0.0402);.;.;

MVP

0.33

MPC

1.9

ClinPred

0.93

GERP RS

3.7

Varity_R

0.16

gMVP

0.73

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