chr9-128633791-G-C

Position:

• chr9-128633791-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_052844.4(DYNC2I2):​c.1564C>G​(p.Arg522Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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 (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: DYNC2I2 NM_052844.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.565

Genes affected

DYNC2I2 (HGNC:28296): (dynein 2 intermediate chain 2) This gene encodes a member of the WD repeat protein family. WD repeats are minimally conserved regions of approximately 40 amino acids typically bracketed by gly-his and trp-asp (GH-WD), which may facilitate formation of heterotrimeric or multiprotein complexes. Members of this family are involved in a variety of cellular processes, including cell cycle progression, signal transduction, apoptosis, and gene regulation. Defects in this gene are a cause of short-rib thoracic dysplasia 11 with or without polydactyly. [provided by RefSeq, Mar 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.25388616).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DYNC2I2	NM_052844.4	c.1564C>G	p.Arg522Gly	missense_variant	9/9	ENST00000372715.7	NP_443076.2
DYNC2I2	XM_047424057.1	c.1564C>G	p.Arg522Gly	missense_variant	10/10		XP_047280013.1
DYNC2I2	XM_011519179.3	c.1480C>G	p.Arg494Gly	missense_variant	10/10		XP_011517481.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DYNC2I2	ENST00000372715.7	c.1564C>G	p.Arg522Gly	missense_variant	9/9	1	NM_052844.4	ENSP00000361800.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Short-rib thoracic dysplasia 11 with or without polydactyly Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 31, 2021

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. This sequence change replaces arginine, which is basic and polar, with glycine, which is neutral and non-polar, at codon 522 of the WDR34 protein (p.Arg522Gly). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with WDR34-related conditions. 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: "Benign"; Align-GVGD: "Class C65"). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.067	T
BayesDel_noAF	Benign	-0.33
CADD	Benign	21
DANN	Benign	0.97
DEOGEN2	Benign	0.051	T
Eigen	Benign	-0.34
Eigen_PC	Benign	-0.20
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Uncertain	0.88	D
M_CAP	Benign	0.029	D
MetaRNN	Benign	0.25	T
MetaSVM	Benign	-0.95	T
MutationAssessor	Benign	1.7	L
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-2.1	N
REVEL	Benign	0.16
Sift	Benign	0.21	T
Sift4G	Benign	0.070	T
Polyphen		0.0020	B
Vest4		0.34
MutPred		0.55		Gain of glycosylation at P521 (P = 0.1764);
MVP		0.39
MPC		0.14
ClinPred		0.59	D
GERP RS		4.5
Varity_R		0.11
gMVP		0.43

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: rs368864898; hg19: chr9-131396070; COSMIC: COSV105280162; COSMIC: COSV105280162;