rs139675128

Positions:

• chr7-754749-G-A

Variant summary

Our verdict is Benign. Variant got -15 ACMG points: 2P and 17B. PM2 BP4_Strong BP6_Very_Strong BP7 BS1

The NM_017802.4(DNAAF5):​c.1185G>A​(p.Thr395=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000855 in 1,613,546 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 Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.00035 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000057 (0 hom.)
• Consequence: DNAAF5 NM_017802.4 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: -3.58

Genes affected

DNAAF5 (HGNC:26013): (dynein axonemal assembly factor 5) The protein encoded by this gene is essential for the preassembly or stability of axonemal dynein arms, and is found only in organisms with motile cilia and flagella. Mutations in this gene are associated with primary ciliary dyskinesia-18, a disorder characterized by abnormalities of motile cilia. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Feb 2013]

ACMG classification

Verdict is Benign. Variant got -15 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).
• BP6: Variant 7-754749-G-A is Benign according to our data. Variant chr7-754749-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 416080.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-3.58 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000355 (54/152288) while in subpopulation AFR AF= 0.00128 (53/41562). AF 95% confidence interval is 0.001. There are 0 homozygotes in gnomad4. There are 27 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DNAAF5	NM_017802.4	c.1185G>A	p.Thr395=	synonymous_variant	5/13	ENST00000297440.11
DNAAF5	XM_024446813.2	c.1185G>A	p.Thr395=	synonymous_variant	5/12
DNAAF5	NR_075098.2	n.1145G>A		non_coding_transcript_exon_variant	5/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DNAAF5	ENST00000297440.11	c.1185G>A	p.Thr395=	synonymous_variant	5/13	1	NM_017802.4	P1
DNAAF5	ENST00000440747.5	c.591G>A	p.Thr197=	synonymous_variant	5/13	2
DNAAF5	ENST00000437419.5	c.504G>A	p.Thr168=	synonymous_variant	4/5	5

Frequencies

GnomAD3 genomes AF: 0.000348 AC: 53 AN: 152170 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00125

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

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: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000720 AC: 18 AN: 249982 Hom.: 0 AF XY: 0.0000370 AC XY: 5 AN XY: 135316

Gnomad AFR exome AF: 0.00105

Gnomad AMR exome AF: 0.00

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: 0.00000889

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000575 AC: 84 AN: 1461258 Hom.: 0 Cov.: 32 AF XY: 0.0000523 AC XY: 38 AN XY: 726938

Gnomad4 AFR exome AF: 0.00164

Gnomad4 AMR exome AF: 0.0000671

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: 0.0000171

Gnomad4 OTH exome AF: 0.0000828

GnomAD4 genome AF: 0.000355 AC: 54 AN: 152288 Hom.: 0 Cov.: 32 AF XY: 0.000363 AC XY: 27 AN XY: 74466

Gnomad4 AFR AF: 0.00128

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000251 Hom.: 0

Bravo AF: 0.000385

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Primary ciliary dyskinesia Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Invitae	Dec 31, 2022	- -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Mar 07, 2022	This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

DNAAF5-related disorder Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Oct 18, 2023

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	0.022
DANN	Benign	0.63
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

LitVar

Other links and lift over

dbSNP: rs139675128; hg19: chr7-794386;