2-26421357-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_145038.5(DRC1):c.313G>C(p.Glu105Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E105K) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: DRC1 NM_145038.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.75

Genes affected

DRC1 (HGNC:24245): (dynein regulatory complex subunit 1) This gene encodes a central component of the nexin-dynein complex (N-DRC), which regulates the assembly of ciliary dynein. Mutations in this gene can cause ciliary dyskinesia. [provided by RefSeq, Aug 2015]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.749

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DRC1	NM_145038.5	c.313G>C	p.Glu105Gln	missense_variant	3/17	ENST00000288710.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DRC1	ENST00000288710.7	c.313G>C	p.Glu105Gln	missense_variant	3/17	2	NM_145038.5	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 31

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.80
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	-0.040
Cadd	Pathogenic	26
Dann	Uncertain	1.0
DEOGEN2	Benign	0.19	T
Eigen	Pathogenic	0.77
Eigen_PC	Pathogenic	0.74
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.80	T
M_CAP	Benign	0.011	T
MetaRNN	Pathogenic	0.75	D
MetaSVM	Benign	-0.60	T
MutationAssessor	Uncertain	2.8	M
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.60	T
PROVEAN	Uncertain	-2.6	D
REVEL	Benign	0.22
Sift	Uncertain	0.0060	D
Sift4G	Uncertain	0.011	D
Polyphen		1.0	D
Vest4		0.85
MutPred		0.33		Gain of MoRF binding (P = 0.0342);
MVP		0.68
MPC		0.35
ClinPred		0.99	D
GERP RS		5.4
Varity_R		0.49
gMVP		0.57

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: rs759868480; hg19: chr2-26644225;