NM_001160148.2:c.280G>C

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001160148.2(DDHD1):c.280G>C(p.Ala94Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000031 in 1,611,130 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000029 ( 0 hom. )

Consequence

DDHD1
NM_001160148.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.58

Variant links:

Genes affected

DDHD1 (HGNC:19714): (DDHD domain containing 1) This gene is a member of the intracellular phospholipase A1 gene family. The protein encoded by this gene preferentially hydrolyzes phosphatidic acid. It is a cytosolic protein with some mitochondrial localization, and is thought to be involved in the regulation of mitochondrial dynamics. Overexpression of this gene causes fragmentation of the tubular structures in mitochondria, while depletion of the gene results in mitochondrial tubule elongation. Deletion of this gene in male mice caused fertility defects, resulting from disruption in the organization of the mitochondria during spermiogenesis. In humans, mutations in this gene have been associated with hereditary spastic paraplegia (HSP), also known as Strumpell-Lorrain disease, or, familial spastic paraparesis (FSP). This inherited disorder is characterized by progressive weakness and spasticity of the legs. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Aug 2015]

DDHD1 links:

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ACMG classification

Classification made for transcript

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=0.25313455).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DDHD1	NM_001160148.2 link	c.280G>C	p.Ala94Pro	missense_variant	Exon 1 of 13	ENST00000673822.2	NP_001153620.1	Q8NEL9-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
DDHD1	ENST00000673822.2 link	c.280G>C	p.Ala94Pro	missense_variant	Exon 1 of 13		NM_001160148.2	ENSP00000500986.2	Q8NEL9-1
DDHD1	ENST00000357758.3 link	c.280G>C	p.Ala94Pro	missense_variant	Exon 1 of 12	1		ENSP00000350401.3	Q8NEL9-2
DDHD1	ENST00000395606.5 link	c.280G>C	p.Ala94Pro	missense_variant	Exon 1 of 13	2		ENSP00000378970.1	Q8NEL9-4
DDHD1	ENST00000673930.1 link	c.-204G>C		upstream_gene_variant				ENSP00000501087.1	A0A669KB51

Frequencies

GnomAD3 genomes

AF:

0.0000463

AC:

AN:

151164

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000122

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:

0.0000295

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000410

AC:

AN:

243728

Hom.:

AF XY:

0.0000376

AC XY:

AN XY:

132870

show subpopulations

Gnomad AFR exome

AF:

0.000130

Gnomad AMR exome

AF:

0.0000875

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000460

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000295

AC:

AN:

1459966

Hom.:

Cov.:

112

AF XY:

0.0000262

AC XY:

AN XY:

726200

show subpopulations

Gnomad4 AFR exome

AF:

0.0000598

Gnomad4 AMR exome

AF:

0.0000672

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:

0.0000324

Gnomad4 OTH exome

AF:

0.0000332

GnomAD4 genome

AF:

0.0000463

AC:

AN:

151164

Hom.:

Cov.:

AF XY:

0.0000542

AC XY:

AN XY:

73746

show subpopulations

Gnomad4 AFR

AF:

0.000122

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000295

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000302

ExAC

AF:

0.0000743

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Hereditary spastic paraplegia 28

Uncertain:1

Sep 01, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine with proline at codon 94 of the DDHD1 protein (p.Ala94Pro). The alanine residue is moderately conserved and there is a small physicochemical difference between alanine and proline. This variant is present in population databases (rs758060048, ExAC 0.02%). This variant has not been reported in the literature in individuals affected with DDHD1-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: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). 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

Uncertain

0.36

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.30

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.0096

.;.;T;.

Eigen

Uncertain

0.32

Eigen_PC

Uncertain

0.27

FATHMM_MKL

Uncertain

0.81

LIST_S2

Uncertain

0.86

D;D;D;D

M_CAP

Pathogenic

0.70

MetaRNN

Benign

0.25

T;T;T;T

MetaSVM

Benign

-0.54

MutationAssessor

Benign

0.81

.;L;L;L

PrimateAI

Pathogenic

0.88

PROVEAN

Benign

-0.35

.;N;N;N

REVEL

Benign

0.20

Sift

Uncertain

0.017

.;D;D;D

Sift4G

Benign

0.30

T;T;T;T

Polyphen

1.0

.;.;D;D

Vest4

0.34

MutPred

0.091

Gain of relative solvent accessibility (P = 0.0479);Gain of relative solvent accessibility (P = 0.0479);Gain of relative solvent accessibility (P = 0.0479);Gain of relative solvent accessibility (P = 0.0479);

MVP

0.16

MPC

1.5

ClinPred

0.15

GERP RS

3.8

Varity_R

0.26

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over