chr11-103154606-G-A

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_001080463.2(DYNC2H1):c.3458G>A(p.Arg1153Gln) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000944 in 1,588,708 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. 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. R1153W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000097 ( 0 hom. )

Consequence

DYNC2H1
NM_001080463.2 missense, splice_region

Scores

Splicing: ADA: 0.9999

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 8.94

Publications

0 publications found

Variant links:

Genes affected

DYNC2H1 (HGNC:2962): (dynein cytoplasmic 2 heavy chain 1) This gene encodes a large cytoplasmic dynein protein that is involved in retrograde transport in the cilium and has a role in intraflagellar transport, a process required for ciliary/flagellar assembly. Mutations in this gene cause a heterogeneous spectrum of conditions related to altered primary cilium function and often involve polydactyly, abnormal skeletogenesis, and polycystic kidneys. Alternative splicing results in multiple transcript variants encoding distinct proteins. [provided by RefSeq, Jan 2010]

DYNC2H1 Gene-Disease associations (from GenCC):

asphyxiating thoracic dystrophy 3
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet, Ambry Genetics
Jeune syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
short rib-polydactyly syndrome, Majewski type
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
short rib-polydactyly syndrome, Verma-Naumoff type
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

DYNC2H1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DYNC2H1	NM_001080463.2 link	c.3458G>A	p.Arg1153Gln	missense_variant, splice_region_variant	Exon 23 of 90	ENST00000650373.2	NP_001073932.1
DYNC2H1	NM_001377.3 link	c.3458G>A	p.Arg1153Gln	missense_variant, splice_region_variant	Exon 23 of 89	ENST00000375735.7	NP_001368.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DYNC2H1	ENST00000650373.2 link	c.3458G>A	p.Arg1153Gln	missense_variant, splice_region_variant	Exon 23 of 90		NM_001080463.2	ENSP00000497174.1
DYNC2H1	ENST00000375735.7 link	c.3458G>A	p.Arg1153Gln	missense_variant, splice_region_variant	Exon 23 of 89	1	NM_001377.3	ENSP00000364887.2

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151836

Hom.:

Cov.:

show subpopulations

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

GnomAD2 exomes

AF:

0.00000466

AC:

AN:

214384

AF XY:

0.00000866

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:

0.0000489

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000974

AC:

AN:

1436872

Hom.:

Cov.:

AF XY:

0.00000842

AC XY:

AN XY:

712874

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32392

American (AMR)

AF:

0.0000254

AC:

AN:

39444

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25476

East Asian (EAS)

AF:

0.00

AC:

AN:

39134

South Asian (SAS)

AF:

0.0000124

AC:

AN:

80436

European-Finnish (FIN)

AF:

0.0000190

AC:

AN:

52706

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5706

European-Non Finnish (NFE)

AF:

0.00000998

AC:

AN:

1102196

Other (OTH)

AF:

0.00

AC:

AN:

59382

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.482

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151836

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74164

show subpopulations

African (AFR)

AF:

0.0000242

AC:

AN:

41378

American (AMR)

AF:

0.00

AC:

AN:

15226

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.00

AC:

AN:

4812

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10576

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67892

Other (OTH)

AF:

0.00

AC:

AN:

2082

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.625

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Jul 22, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.3458G>A (p.R1153Q) alteration is located in exon 23 (coding exon 23) of the DYNC2H1 gene. This alteration results from a G to A substitution at nucleotide position 3458, causing the arginine (R) at amino acid position 1153 to be replaced by a glutamine (Q). However, this change occurs in the last base pair of coding exon 23, which makes it likely to have some effect on normal mRNA splicing. Based on data from gnomAD, the A allele has an overall frequency of <0.001% (1/214384) total alleles studied. The highest observed frequency was 0.005% (1/20436) of European (Finnish) alleles. This variant has been identified in conjunction with another DYNC2H1 variant in an individual with features consistent with DYNC2H1-related skeletal ciliopathy (Farwell, 2015). This nucleotide and amino acid position is highly conserved in available vertebrate species. The in silico prediction for this amino acid alteration is inconclusive. In silico splice site analysis predicts that this nucleotide alteration will weaken the native splice donor site. Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.

Jeune thoracic dystrophy

Uncertain:1

Jun 06, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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. Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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 disruptive. ClinVar contains an entry for this variant (Variation ID: 225004). This missense change has been observed in individual(s) with clinical features of DYNC2H1-related conditions (PMID: 25356970). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 1153 of the DYNC2H1 protein (p.Arg1153Gln). This variant also falls at the last nucleotide of exon 23, which is part of the consensus splice site for this exon.

Asphyxiating thoracic dystrophy 3

Uncertain:1

Juno Genomics, Hangzhou Juno Genomics, Inc

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Absent from controls (or at extremely low frequency if recessive) in Genome Aggregation Database, Exome Sequencing Project, 1000 Genomes Project, or Exome Aggregation Consortium.

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.39

BayesDel_addAF

Uncertain

0.047

BayesDel_noAF

Benign

-0.17

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.0

.;D;D;.;.

Eigen

Uncertain

0.50

Eigen_PC

Uncertain

0.50

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.94

D;.;D;.;D

M_CAP

Uncertain

0.085

MetaRNN

Pathogenic

0.88

D;D;D;D;D

MetaSVM

Benign

-0.69

MutationAssessor

Benign

0.0

.;M;M;M;M

PhyloP100

8.9

PrimateAI

Uncertain

0.52

PROVEAN

Benign

0.0

.;D;.;.;D

REVEL

Benign

0.0

Sift

Pathogenic

0.0

.;D;.;.;D

Sift4G

Pathogenic

0.0

.;D;.;.;D

Vest4

0.0

ClinPred

0.98

GERP RS

4.4

Varity_R

0.46

gMVP

0.57

Mutation Taster

=26/74

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.94

SpliceAI score (max)

0.79

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.79

Position offset: 0

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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over