rs150737854

Positions:

• chr14-49633744-C-A
• chr14-49633744-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_018139.3(DNAAF2):​c.1406G>T​(p.Cys469Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. C469S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: DNAAF2 NM_018139.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.309

Genes affected

DNAAF2 (HGNC:20188): (dynein axonemal assembly factor 2) This gene encodes a highly conserved protein involved in the preassembly of dynein arm complexes which power cilia. These complexes are found in some cilia and are assembled in the cytoplasm prior to transport for cilia formation. Mutations in this gene have been associated with primary ciliary dyskinesia. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Oct 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07290605).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DNAAF2	NM_018139.3	c.1406G>T	p.Cys469Phe	missense_variant	1/3	ENST00000298292.13	NP_060609.2
DNAAF2	NM_001083908.2	c.1406G>T	p.Cys469Phe	missense_variant	1/2		NP_001077377.1
DNAAF2	NM_001378453.1	c.-466G>T		5_prime_UTR_variant	1/2		NP_001365382.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DNAAF2	ENST00000298292.13	c.1406G>T	p.Cys469Phe	missense_variant	1/3	1	NM_018139.3	ENSP00000298292.8
DNAAF2	ENST00000406043.3	c.1406G>T	p.Cys469Phe	missense_variant	1/2	1		ENSP00000384862.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1441088 Hom.: 0 Cov.: 92 AF XY: 0.00 AC XY: 0 AN XY: 715646

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.070
BayesDel_addAF	Benign	-0.34	T
BayesDel_noAF	Benign	-0.73
CADD	Benign	2.4
DANN	Benign	0.66
DEOGEN2	Benign	0.0024	T;.
Eigen	Benign	-1.5
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.020	N
LIST_S2	Benign	0.30	T;T
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.073	T;T
MetaSVM	Benign	-0.95	T
MutationAssessor	Benign	1.2	L;L
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-2.0	N;N
REVEL	Benign	0.034
Sift	Benign	0.47	T;T
Sift4G	Benign	0.070	T;T
Polyphen		0.0	B;B
Vest4		0.17
MutPred		0.26		Gain of catalytic residue at G465 (P = 5e-04);Gain of catalytic residue at G465 (P = 5e-04);
MVP		0.13
MPC		0.81
ClinPred		0.038	T
GERP RS		0.70
Varity_R		0.071
gMVP		0.30

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: rs150737854; hg19: chr14-50100462;