15-55430742-T-C

Variant names:

• chr15-55430742-T-C
• rs1321352108
• ENST00000457155.6:c.1085A>G

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM2 BP4_Strong BP6_Moderate

The NM_001033559.3(DNAAF4):​c.1085A>G​(p.His362Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000411 in 1,461,174 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/15 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: DNAAF4 NM_001033559.3 missense
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.613

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:43019): (DNAAF4-CCPG1 readthrough (NMD candidate)) This locus represents naturally occurring read-through transcription between the neighboring dyslexia susceptibility 1 candidate 1 (DYX1C1) and cell cycle progression 1 (CCPG1) genes on chromosome 15. The read-through transcript is a candidate for nonsense-mediated mRNA decay (NMD), and is thus unlikely to produce a protein product. [provided by RefSeq, Mar 2011]

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.063753456).
• BP6: Variant 15-55430742-T-C is Benign according to our data. Variant chr15-55430742-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 1540572.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNAAF4	NM_130810.4	c.1191A>G	p.Pro397Pro	synonymous_variant	Exon 10 of 10	ENST00000321149.7	NP_570722.2
DNAAF4	NM_001033559.3	c.1085A>G	p.His362Arg	missense_variant	Exon 9 of 9		NP_001028731.1
DNAAF4	NM_001033560.2	c.1047+4163A>G		intron_variant	Intron 8 of 8		NP_001028732.1
DNAAF4-CCPG1	NR_037923.1	n.1408+1755A>G		intron_variant	Intron 8 of 15

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNAAF4	ENST00000321149.7	c.1191A>G	p.Pro397Pro	synonymous_variant	Exon 10 of 10	1	NM_130810.4	ENSP00000323275.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000411 AC: 6 AN: 1461174 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 726922

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000101

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Oct 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	8.2
DANN	Benign	0.97
Eigen	Benign	-0.29
Eigen_PC	Benign	-0.14
FATHMM_MKL	Benign	0.68	D
LIST_S2	Benign	0.41	T
M_CAP	Benign	0.0025	T
MetaRNN	Benign	0.064	T
MetaSVM	Benign	-0.96	T
PROVEAN	Benign	2.4	N
REVEL	Benign	0.048
Sift	Benign	0.10	T
Sift4G	Benign	0.092	T
Polyphen		0.0040	B
Vest4		0.12
MutPred		0.52		Loss of loop (P = 0.0022);
MVP		0.35
ClinPred		0.10	T
GERP RS		3.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs1321352108; hg19: chr15-55722940;