1-26469069-C-G

Position:

• chr1-26469069-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_205861.3(DHDDS):​c.940C>G​(p.Leu314Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,312 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: DHDDS NM_205861.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.69

Genes affected

DHDDS (HGNC:20603): (dehydrodolichyl diphosphate synthase subunit) The protein encoded by this gene catalyzes cis-prenyl chain elongation to produce the polyprenyl backbone of dolichol, a glycosyl carrier lipid required for the biosynthesis of several classes of glycoproteins. Mutations in this gene are associated with retinitis pigmentosa type 59. Alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Aug 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.32153258).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DHDDS	NM_205861.3	c.940C>G	p.Leu314Val	missense_variant	9/9	ENST00000236342.12	NP_995583.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DHDDS	ENST00000236342.12	c.940C>G	p.Leu314Val	missense_variant	9/9	1	NM_205861.3	ENSP00000236342	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461312 Hom.: 0 Cov.: 34 AF XY: 0.00 AC XY: 0 AN XY: 726940

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.057	T
BayesDel_noAF	Benign	-0.32
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.34	.;T;.;.;.
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.50
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Uncertain	0.88	D;D;D;D;D
M_CAP	Benign	0.017	T
MetaRNN	Benign	0.32	T;T;T;T;T
MetaSVM	Benign	-0.79	T
MutationAssessor	Benign	1.5	.;L;.;.;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.72	T
PROVEAN	Benign	-1.5	N;N;N;N;N
REVEL	Benign	0.13
Sift	Uncertain	0.0050	D;D;D;D;D
Sift4G	Uncertain	0.012	D;D;D;D;D
Polyphen		0.94, 0.95, 0.96	.;P;P;D;.
Vest4		0.33
MutPred		0.36		.;Gain of MoRF binding (P = 0.0972);.;.;.;
MVP		0.33
MPC		0.74
ClinPred		0.79	D
GERP RS		4.6
Varity_R		0.25
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: rs1553124038; hg19: chr1-26795560;