rs878854167

Positions:

• chr11-103191574-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001080463.2(DYNC2H1):​c.7495C>G​(p.Leu2499Val) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: DYNC2H1 NM_001080463.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.92

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DYNC2H1	NM_001080463.2	c.7495C>G	p.Leu2499Val	missense_variant	46/90	ENST00000650373.2	NP_001073932.1
DYNC2H1	NM_001377.3	c.7495C>G	p.Leu2499Val	missense_variant	46/89	ENST00000375735.7	NP_001368.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DYNC2H1	ENST00000650373.2	c.7495C>G	p.Leu2499Val	missense_variant	46/90		NM_001080463.2	ENSP00000497174	A1
DYNC2H1	ENST00000375735.7	c.7495C>G	p.Leu2499Val	missense_variant	46/89	1	NM_001377.3	ENSP00000364887	P3
DYNC2H1	ENST00000334267.11	c.2205+57155C>G		intron_variant		1		ENSP00000334021
DYNC2H1	ENST00000649323.1	c.*5040C>G		3_prime_UTR_variant, NMD_transcript_variant	44/51			ENSP00000497581

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Jeune thoracic dystrophy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

May 10, 2018

This sequence change replaces leucine with valine at codon 2499 of the DYNC2H1 protein (p.Leu2499Val). The leucine residue is highly conserved and there is a small physicochemical difference between leucine and valine. This variant is not present in population databases (ExAC no frequency). This variant has been observed on the opposite chromosome (in trans) from a pathogenic variant in an individual affected with asphyxiating thoracic dysplasia (Invitae). This finding is consistent with autosomal recessive inheritance, and suggests that this variant contributes to disease. ClinVar contains an entry for this variant (Variation ID: 238274). 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, 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	0.33
BayesDel_addAF	Benign	-0.0042	T
BayesDel_noAF	Benign	-0.24
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.23	T;T;.;.
Eigen	Pathogenic	0.70
Eigen_PC	Pathogenic	0.71
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.90	.;D;.;D
M_CAP	Benign	0.029	D
MetaRNN	Uncertain	0.44	T;T;T;T
MetaSVM	Benign	-0.63	T
MutationAssessor	Uncertain	2.3	M;M;M;M
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.72	T
PROVEAN	Benign	-2.3	N;.;.;N
REVEL	Benign	0.14
Sift	Benign	0.054	T;.;.;T
Sift4G	Uncertain	0.055	T;.;.;T
Polyphen		0.95	P;P;P;P
Vest4		0.63
MutPred		0.40		Gain of catalytic residue at L2499 (P = 0.0438);Gain of catalytic residue at L2499 (P = 0.0438);Gain of catalytic residue at L2499 (P = 0.0438);Gain of catalytic residue at L2499 (P = 0.0438);
MVP		0.79
MPC		0.22
ClinPred		0.92	D
GERP RS		5.9
Varity_R		0.25
gMVP		0.55

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: rs878854167; hg19: chr11-103062303;