chr3-52331279-C-T

Position:

• chr3-52331279-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The ENST00000420323.7(DNAH1):​c.1003C>T​(p.Pro335Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P335A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: DNAH1 ENST00000420323.7 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.26

Genes affected

DNAH1 (HGNC:2940): (dynein axonemal heavy chain 1) This gene encodes an inner dynein arm heavy chain that provides structural support between the radial spokes and the outer doublet of the sperm tail. Naturally occurring mutations in this gene are associated with primary ciliary dyskinesia and multiple morphological anomalies of the flagella that result in asthenozoospermia and male infertility. Mice with a homozygous knockout of the orthologous gene are viable but have reduced sperm motility and are infertile. [provided by RefSeq, Feb 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.37799048).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DNAH1	NM_015512.5	c.1003C>T	p.Pro335Ser	missense_variant	7/78	ENST00000420323.7	NP_056327.4
DNAH1	XM_017006129.2	c.1003C>T	p.Pro335Ser	missense_variant	8/80		XP_016861618.1
DNAH1	XM_017006130.2	c.1003C>T	p.Pro335Ser	missense_variant	8/79		XP_016861619.1
DNAH1	XM_017006131.2	c.1003C>T	p.Pro335Ser	missense_variant	8/79		XP_016861620.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DNAH1	ENST00000420323.7	c.1003C>T	p.Pro335Ser	missense_variant	7/78	1	NM_015512.5	ENSP00000401514	P1
DNAH1	ENST00000486752.5	n.1264C>T		non_coding_transcript_exon_variant	7/77	2
DNAH1	ENST00000497875.1	n.1168C>T		non_coding_transcript_exon_variant	8/21	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1457672 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 724528

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.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Spermatogenic failure 18;C4539798:Ciliary dyskinesia, primary, 37 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jun 16, 2017

This sequence change replaces proline with serine at codon 335 of the DNAH1 protein (p.Pro335Ser). The proline residue is highly conserved and there is a moderate physicochemical difference between proline and serine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with a DNAH1-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). In summary, this variant has uncertain impact on DNAH1 function. The available evidence is currently insufficient to determine its role 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	0.15
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	21
DANN	Uncertain	0.99
Eigen	Benign	-0.090
Eigen_PC	Benign	0.083
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.74	T
M_CAP	Benign	0.0070	T
MetaRNN	Benign	0.38	T
MetaSVM	Benign	-1.1	T
MutationTaster	Benign	0.96	D
PrimateAI	Benign	0.40	T
PROVEAN	Benign	-1.9	N
REVEL	Benign	0.082
Sift	Benign	0.14	T
Sift4G	Benign	0.78	T
Vest4		0.57
MutPred		0.43		Gain of relative solvent accessibility (P = 0.0479);
MVP		0.32
MPC		0.13
ClinPred		0.74	D
GERP RS		4.7
gMVP		0.52

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: rs1553628078; hg19: chr3-52365295;