16-84170122-G-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_178452.6(DNAAF1):c.1294G>C(p.Glu432Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000279 in 1,431,186 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E432D) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000028 (0 hom.)
• Consequence: DNAAF1 NM_178452.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.05

Genes affected

DNAAF1 (HGNC:30539): (dynein axonemal assembly factor 1) The protein encoded by this gene is cilium-specific and is required for the stability of the ciliary architecture. It is involved in the regulation of microtubule-based cilia and actin-based brush border microvilli. Mutations in this gene are associated with primary ciliary dyskinesia-13. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.05890748).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DNAAF1	NM_178452.6	c.1294G>C	p.Glu432Gln	missense_variant	8/12	ENST00000378553.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DNAAF1	ENST00000378553.10	c.1294G>C	p.Glu432Gln	missense_variant	8/12	1	NM_178452.6	P1
DNAAF1	ENST00000563818.5	n.971G>C		non_coding_transcript_exon_variant	4/8	2
DNAAF1	ENST00000570298.5	n.1448G>C		non_coding_transcript_exon_variant	8/11	2
DNAAF1	ENST00000563093.5	c.1225+69G>C		intron_variant, NMD_transcript_variant		2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000279 AC: 4 AN: 1431186 Hom.: 0 Cov.: 96 AF XY: 0.00000141 AC XY: 1 AN XY: 711384

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000543

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000183

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.094
BayesDel_addAF	Benign	-0.32	T
BayesDel_noAF	Benign	-0.70
Cadd	Benign	6.3
Dann	Benign	0.72
DEOGEN2	Benign	0.0037	T
Eigen	Benign	-0.87
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.066	N
LIST_S2	Benign	0.58	T
M_CAP	Benign	0.0019	T
MetaRNN	Benign	0.059	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.6	L
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.23	T
PROVEAN	Benign	-0.51	N
REVEL	Benign	0.039
Sift	Benign	0.14	T
Sift4G	Benign	0.53	T
Polyphen		0.11	B
Vest4		0.059
MutPred		0.13		Gain of methylation at K430 (P = 0.1199);
MVP		0.26
MPC		0.020
ClinPred		0.17	T
GERP RS		0.087
Varity_R		0.090
gMVP		0.14

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: rs144990549; hg19: chr16-84203728;