rs144808884

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBS1_Supporting

The NM_001206927.2(DNAH8):c.12656G>A(p.Arg4219Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000366 in 1,603,952 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 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. R4219G) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00036 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00037 ( 1 hom. )

Consequence

DNAH8
NM_001206927.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 2.62

Publications

3 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: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.032395393).

BS1

Variant frequency is greater than expected in population afr. GnomAdExome4 allele frequency = 0.000366 (532/1451754) while in subpopulation AFR AF = 0.000976 (32/32772). AF 95% confidence interval is 0.000711. There are 1 homozygotes in GnomAdExome4. There are 233 alleles in the male GnomAdExome4 subpopulation. Median coverage is 29. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNAH8	NM_001206927.2 link	c.12656G>A	p.Arg4219Gln	missense_variant	Exon 84 of 93	ENST00000327475.11	NP_001193856.1	Q96JB1Q8IU65A0A075B6F3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNAH8	ENST00000327475.11 link	c.12656G>A	p.Arg4219Gln	missense_variant	Exon 84 of 93	5	NM_001206927.2	ENSP00000333363.7		A0A075B6F3
DNAH8	ENST00000359357.7 link	c.12005G>A	p.Arg4002Gln	missense_variant	Exon 82 of 91	2		ENSP00000352312.3		Q96JB1-1

Frequencies

GnomAD3 genomes

AF:

0.000362

AC:

AN:

152080

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000749

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:

0.00

Gnomad NFE

AF:

0.000323

Gnomad OTH

AF:

0.000479

GnomAD2 exomes

AF:

0.000194

AC:

AN:

237330

AF XY:

0.000156

show subpopulations

Gnomad AFR exome

AF:

0.000953

Gnomad AMR exome

AF:

0.0000979

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000219

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000366

AC:

532

AN:

1451754

Hom.:

Cov.:

AF XY:

0.000323

AC XY:

233

AN XY:

722002

show subpopulations

African (AFR)

AF:

0.000976

AC:

AN:

32772

American (AMR)

AF:

0.0000714

AC:

AN:

42028

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25690

East Asian (EAS)

AF:

0.0000254

AC:

AN:

39380

South Asian (SAS)

AF:

0.000155

AC:

AN:

83840

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53336

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5724

European-Non Finnish (NFE)

AF:

0.000404

AC:

448

AN:

1108976

Other (OTH)

AF:

0.000583

AC:

AN:

60008

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.466

Heterozygous variant carriers

120

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

110

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000361

AC:

AN:

152198

Hom.:

Cov.:

AF XY:

0.000282

AC XY:

AN XY:

74402

show subpopulations

African (AFR)

AF:

0.000747

AC:

AN:

41520

American (AMR)

AF:

0.0000654

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10590

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.000323

AC:

AN:

68014

Other (OTH)

AF:

0.000474

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000268

Hom.:

Bravo

AF:

0.000393

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.000908

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.000165

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000276

EpiControl

AF:

0.000120

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jun 11, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.12656G>A (p.R4219Q) alteration is located in exon 84 (coding exon 83) of the DNAH8 gene. This alteration results from a G to A substitution at nucleotide position 12656, causing the arginine (R) at amino acid position 4219 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Primary ciliary dyskinesia

Uncertain:1

Sep 01, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 4219 of the DNAH8 protein (p.Arg4219Gln). This variant is present in population databases (rs144808884, gnomAD 0.08%). This missense change has been observed in individual(s) with features of primary ciliary dyskinesia (Invitae). ClinVar contains an entry for this variant (Variation ID: 407304). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Not Available"; Align-GVGD: "Class C0"). 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

0.080

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.53

CADD

Benign

(source)

DANN

Benign

0.49

DEOGEN2

Benign

0.0022

T;T

Eigen

Benign

-0.65

Eigen_PC

Benign

-0.39

FATHMM_MKL

Benign

0.22

LIST_S2

Uncertain

0.95

D;D

M_CAP

Benign

0.0058

MetaRNN

Benign

0.032

T;T

MetaSVM

Benign

-0.88

MutationAssessor

Benign

-1.0

.;N

PhyloP100

2.6

PrimateAI

Benign

0.33

PROVEAN

Benign

0.040

.;N

REVEL

Benign

0.13

Sift

Benign

1.0

.;T

Polyphen

0.0020

.;B

Vest4

0.32

MVP

0.59

MPC

0.15

ClinPred

0.020

GERP RS

5.0

Varity_R

0.061

gMVP

0.19

Mutation Taster

=89/11

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

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

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over