Genetic Variant RSPH1:p.Pro228AlafsTer15 (chr21-42477337-C-CT) – ACMG Classification: Pathogenic (12 pts)

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1PM2PP5_Moderate

The NM_080860.4(RSPH1):c.680dupA(p.Pro228AlafsTer15) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000292 in 1,610,796 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000027 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000029 ( 0 hom. )

Consequence

RSPH1
NM_080860.4 frameshift

Scores

Not classified

Clinical Significance

Pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 1.93

Variant links:

Genes affected

RSPH1 (HGNC:12371): (radial spoke head component 1) This gene encodes a male meiotic metaphase chromosome-associated acidic protein. This gene is expressed in tissues with motile cilia or flagella, including the trachea, lungs, airway brushings, and testes. Mutations in this gene result in primary ciliary dyskinesia-24. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2014]

RSPH1 links:

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ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 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;

PP5

Variant 21-42477337-C-CT is Pathogenic according to our data. Variant chr21-42477337-C-CT is described in ClinVar as [Pathogenic]. Clinvar id is 454946.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RSPH1	NM_080860.4 link	c.680dupA	p.Pro228AlafsTer15	frameshift_variant	Exon 7 of 9	ENST00000291536.8	NP_543136.1	Q8WYR4-1
RSPH1	NM_001286506.2 link	c.566dupA	p.Pro190AlafsTer15	frameshift_variant	Exon 6 of 8		NP_001273435.1	Q8WYR4-2
RSPH1	XM_011529786.2 link	c.608dupA	p.Pro204AlafsTer15	frameshift_variant	Exon 6 of 8		XP_011528088.1
RSPH1	XM_005261208.3 link	c.473dupA	p.Pro159AlafsTer15	frameshift_variant	Exon 5 of 7		XP_005261265.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
RSPH1	ENST00000291536.8 link	c.680dupA	p.Pro228AlafsTer15	frameshift_variant	Exon 7 of 9	1	NM_080860.4	ENSP00000291536.3	Q8WYR4-1
RSPH1	ENST00000398352.3 link	c.566dupA	p.Pro190AlafsTer15	frameshift_variant	Exon 6 of 8	5		ENSP00000381395.3	Q8WYR4-2
RSPH1	ENST00000493019.1 link	n.2298dupA		non_coding_transcript_exon_variant	Exon 6 of 8	2

Frequencies

GnomAD3 genomes

AF:

0.0000268

AC:

AN:

149194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000247

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000212

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000299

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

251304

Hom.:

AF XY:

0.0000442

AC XY:

AN XY:

135896

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000294

AC:

AN:

1461602

Hom.:

Cov.:

AF XY:

0.0000344

AC XY:

AN XY:

727092

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000360

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000268

AC:

AN:

149194

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

72700

show subpopulations

Gnomad4 AFR

AF:

0.0000247

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000212

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000299

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000227

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Primary ciliary dyskinesia

Pathogenic:1

Jul 17, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

ClinVar contains an entry for this variant (Variation ID: 454946). For these reasons, this variant has been classified as Pathogenic. This variant has not been reported in the literature in individuals affected with RSPH1-related conditions. This variant is present in population databases (rs556286752, gnomAD 0.01%). This sequence change creates a premature translational stop signal (p.Pro228Alafs*15) in the RSPH1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in RSPH1 are known to be pathogenic (PMID: 23993197). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

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

Below is the list of publications found by LitVar. It may be empty.

21-42477337-CT-CTT

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over