rs745396760

chr15-55439551-C-T

Variant summary

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

The NM_130810.4(DNAAF4):c.814G>A(p.Ala272Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000167 in 1,613,884 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000085 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000096 (0 hom.)
• Consequence: DNAAF4 NM_130810.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.706

Genes affected

DNAAF4 (HGNC:21493): (dynein axonemal assembly factor 4) This gene encodes a tetratricopeptide repeat domain-containing protein. The encoded protein interacts with estrogen receptors and the heat shock proteins, Hsp70 and Hsp90. An homologous protein in rat has been shown to function in neuronal migration in the developing neocortex. A chromosomal translocation involving this gene is associated with a susceptibility to developmental dyslexia. Mutations in this gene are associated with deficits in reading and spelling. Alternative splicing results in multiple transcript variants. Read-through transcription also exists between this gene and the downstream cell cycle progression 1 (CCPG1) gene. [provided by RefSeq, Mar 2011]

DNAAF4-CCPG1 (HGNC:):

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=0.078835696).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DNAAF4	NM_130810.4	c.814G>A	p.Ala272Thr	missense_variant	7/10	ENST00000321149.7
DNAAF4-CCPG1	NR_037923.1	n.1069G>A		non_coding_transcript_exon_variant	6/16
DNAAF4	NM_001033560.2	c.814G>A	p.Ala272Thr	missense_variant	7/9
DNAAF4	NM_001033559.3	c.814G>A	p.Ala272Thr	missense_variant	7/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DNAAF4	ENST00000321149.7	c.814G>A	p.Ala272Thr	missense_variant	7/10	1	NM_130810.4	P1

Frequencies

GnomAD3 genomes AF: 0.0000854 AC: 13 AN: 152182 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000483

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: 0.00316

Gnomad NFE AF: 0.000132

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000159 AC: 4 AN: 251382 Hom.: 0 AF XY: 0.0000221 AC XY: 3 AN XY: 135880

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

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: 0.00000879

Gnomad OTH exome AF: 0.000326

GnomAD4 exome AF: 0.00000958 AC: 14 AN: 1461702 Hom.: 0 Cov.: 30 AF XY: 0.00000825 AC XY: 6 AN XY: 727154

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

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: 0.00000719

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome AF: 0.0000854 AC: 13 AN: 152182 Hom.: 0 Cov.: 32 AF XY: 0.0000807 AC XY: 6 AN XY: 74352

Gnomad4 AFR AF: 0.0000483

Gnomad4 AMR AF: 0.0000655

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000132

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000282 Hom.: 0

Bravo AF: 0.0000642

ExAC AF: 0.0000165 AC: 2

EpiCase AF: 0.000109

EpiControl AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Feb 10, 2022

This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 272 of the DNAAF4 protein (p.Ala272Thr). This variant is present in population databases (rs745396760, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with DNAAF4-related conditions. ClinVar contains an entry for this variant (Variation ID: 581801). 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. 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	0.078
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.43
Cadd	Benign	16
Dann	Uncertain	0.99
Eigen	Benign	-0.24
Eigen_PC	Benign	-0.20
FATHMM_MKL	Benign	0.34	N
LIST_S2	Benign	0.84	T;D;T;.
M_CAP	Benign	0.011	T
MetaRNN	Benign	0.079	T;T;T;T
MetaSVM	Benign	-0.63	T
MutationTaster	Benign	0.61	D;D;D;D;D
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-2.1	N;N;N;N
REVEL	Benign	0.028
Sift	Benign	0.23	T;T;T;T
Sift4G	Benign	0.47	T;T;T;T
Polyphen		0.93	P;B;B;B
Vest4		0.13
MutPred		0.22		Loss of helix (P = 0.0626);Loss of helix (P = 0.0626);Loss of helix (P = 0.0626);Loss of helix (P = 0.0626);
MVP		0.75
MPC		0.048
ClinPred		0.13	T
GERP RS		3.1
Varity_R		0.057
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: rs745396760; hg19: chr15-55731749; COSMIC: COSV58246353; COSMIC: COSV58246353;