Genetic Variant DNAH8:p.Gly1724Ala (chr6-38848773-G-C) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_001206927.2(DNAH8):c.5171G>C(p.Gly1724Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,262 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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. G1724D) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

DNAH8
NM_001206927.2 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.86

Publications

5 publications found

Variant links:

Genes affected

DNAH8 (HGNC:2952): (dynein axonemal heavy chain 8) The protein encoded by this gene is a heavy chain of an axonemal dynein involved in sperm and respiratory cilia motility. Axonemal dyneins generate force through hydrolysis of ATP and binding to microtubules. [provided by RefSeq, Jan 2012]

DNAH8 Gene-Disease associations (from GenCC):

spermatogenic failure 46
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen
spermatogenic failure 5
Inheritance: AR Classification: MODERATE Submitted by: Franklin by Genoox
primary ciliary dyskinesia
Inheritance: AR Classification: NO_KNOWN Submitted by: ClinGen

DNAH8 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.40906727).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNAH8	NM_001206927.2 link	c.5171G>C	p.Gly1724Ala	missense_variant	Exon 37 of 93	ENST00000327475.11	NP_001193856.1	Q96JB1Q8IU65A0A075B6F3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
DNAH8	ENST00000327475.11 link	c.5171G>C	p.Gly1724Ala	missense_variant	Exon 37 of 93	5	NM_001206927.2	ENSP00000333363.7	A0A075B6F3
DNAH8	ENST00000359357.7 link	c.4520G>C	p.Gly1507Ala	missense_variant	Exon 35 of 91	2		ENSP00000352312.3	Q96JB1-1
DNAH8	ENST00000449981.6 link	c.5171G>C	p.Gly1724Ala	missense_variant	Exon 36 of 82	5		ENSP00000415331.2	H0Y7V4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251048

AF XY:

0.00000737

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461262

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726926

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

33448

American (AMR)

AF:

0.00

AC:

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26104

East Asian (EAS)

AF:

0.00

AC:

AN:

39674

South Asian (SAS)

AF:

0.00

AC:

AN:

86222

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53412

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1111556

Other (OTH)

AF:

0.00

AC:

AN:

60368

⚠️ 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.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00000326

Hom.:

Bravo

AF:

0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.74

BayesDel_addAF

Uncertain

0.036

BayesDel_noAF

Benign

-0.19

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.12

T;T;T

Eigen

Pathogenic

0.91

Eigen_PC

Pathogenic

0.89

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.96

D;D;D

M_CAP

Benign

0.039

MetaRNN

Benign

0.41

T;T;T

MetaSVM

Benign

-0.37

MutationAssessor

Pathogenic

3.0

.;.;M

PhyloP100

7.9

PrimateAI

Pathogenic

0.83

PROVEAN

Pathogenic

-5.4

.;D;D

REVEL

Uncertain

0.54

Sift

Uncertain

0.0040

.;D;D

Polyphen

1.0

.;.;D

Vest4

0.22

MutPred

0.73

.;.;Gain of catalytic residue at G1507 (P = 0.0511);

MVP

0.76

MPC

0.34

ClinPred

0.99

GERP RS

5.8

Varity_R

0.75

gMVP

0.57

Mutation Taster

=66/34

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over