rs980617815

Positions:

• chr6-38896127-C-T

Variant summary

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

The NM_001206927.2(DNAH8):​c.8842C>T​(p.Pro2948Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00000682 in 1,613,482 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000068 (0 hom.)
• Consequence: DNAH8 NM_001206927.2 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 4.08

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]

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=0.31856352).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DNAH8	NM_001206927.2	c.8842C>T	p.Pro2948Ser	missense_variant	60/93	ENST00000327475.11	NP_001193856.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DNAH8	ENST00000327475.11	c.8842C>T	p.Pro2948Ser	missense_variant	60/93	5	NM_001206927.2	ENSP00000333363	P2
DNAH8	ENST00000359357.7	c.8191C>T	p.Pro2731Ser	missense_variant	58/91	2		ENSP00000352312	A2
DNAH8	ENST00000449981.6	c.8842C>T	p.Pro2948Ser	missense_variant	59/82	5		ENSP00000415331

Frequencies

GnomAD3 genomes AF: 0.00000659 AC: 1 AN: 151684 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000242

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000684 AC: 10 AN: 1461798 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727202

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: 0.00000809

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome AF: 0.00000659 AC: 1 AN: 151684 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74136

Gnomad4 AFR AF: 0.0000242

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 16, 2022

The c.8842C>T (p.P2948S) alteration is located in exon 60 (coding exon 59) of the DNAH8 gene. This alteration results from a C to T substitution at nucleotide position 8842, causing the proline (P) at amino acid position 2948 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Primary ciliary dyskinesia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 19, 2019

This sequence change replaces proline with serine at codon 2948 of the DNAH8 protein (p.Pro2948Ser). The proline residue is moderately 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 DNAH8-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. 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	0.087
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	19
DANN	Benign	0.90
DEOGEN2	Benign	0.019	T;T;T
Eigen	Benign	-0.29
Eigen_PC	Benign	-0.15
FATHMM_MKL	Benign	0.72	D
LIST_S2	Benign	0.78	T;T;T
M_CAP	Benign	0.0040	T
MetaRNN	Benign	0.32	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.7	.;.;L
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.41	T
PROVEAN	Pathogenic	-7.3	D;N;N
REVEL	Benign	0.058
Sift	Uncertain	0.0040	D;T;T
Polyphen		0.017	.;.;B
Vest4		0.52
MutPred		0.32		.;.;Gain of loop (P = 0.0312);
MVP		0.67
MPC		0.12
ClinPred		0.88	D
GERP RS		5.4
Varity_R		0.037
gMVP		0.35

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

LitVar

Other links and lift over

dbSNP: rs980617815; hg19: chr6-38863903;