chr3-52326310-G-T

Variant names:

• chr3-52326310-G-T
• rs757070489
• NM_015512.5:c.577G>T

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_015512.5(DNAH1):​c.577G>T​(p.Glu193*) variant causes a stop gained change. The variant allele was found at a frequency of 0.000000688 in 1,452,790 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: DNAH1 NM_015512.5 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.64
• Publications: 0 publications found

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]

DNAH1 Gene-Disease associations (from GenCC):

• spermatogenic failure 18

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae)
• ciliary dyskinesia, primary, 37

  Inheritance: AR Classification: STRONG, MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, ClinGen
• primary ciliary dyskinesia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• non-syndromic male infertility due to sperm motility disorder

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNAH1	NM_015512.5	c.577G>T	p.Glu193*	stop_gained	Exon 4 of 78	ENST00000420323.7	NP_056327.4
DNAH1	XM_017006129.2	c.577G>T	p.Glu193*	stop_gained	Exon 5 of 80		XP_016861618.1
DNAH1	XM_017006130.2	c.577G>T	p.Glu193*	stop_gained	Exon 5 of 79		XP_016861619.1
DNAH1	XM_017006131.2	c.577G>T	p.Glu193*	stop_gained	Exon 5 of 79		XP_016861620.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNAH1	ENST00000420323.7	c.577G>T	p.Glu193*	stop_gained	Exon 4 of 78	1	NM_015512.5	ENSP00000401514.2
DNAH1	ENST00000486752.5	n.838G>T		non_coding_transcript_exon_variant	Exon 4 of 77	2
DNAH1	ENST00000497875.1	n.742G>T		non_coding_transcript_exon_variant	Exon 5 of 21	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.88e-7 AC: 1 AN: 1452790 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 722958

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33462

American (AMR) AF: 0.00 AC: 0 AN: 44682

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26104

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86120

European-Finnish (FIN) AF: 0.0000221 AC: 1 AN: 45208

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5738

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111492

Other (OTH) AF: 0.00 AC: 0 AN: 60290

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.66
CADD	Pathogenic	37
DANN	Uncertain	1.0
Eigen	Pathogenic	1.2
Eigen_PC	Pathogenic	1.1
FATHMM_MKL	Pathogenic	0.99	D
PhyloP100		6.6
Vest4		0.28
GERP RS		5.9
Mutation Taster		=25/175	disease causing (fs/PTC)

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

Other links and lift over

dbSNP: rs757070489; hg19: chr3-52360326;