14-53046785-T-C

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001160148.2(DDHD1):c.2686A>G(p.Asn896Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000498 in 1,605,600 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000027 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

DDHD1
NM_001160148.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.996

Publications

1 publications found

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 Gene-Disease associations (from GenCC):

hereditary spastic paraplegia
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
hereditary spastic paraplegia 28
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet, Ambry Genetics

DDHD1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.031624496).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DDHD1	NM_001160148.2 link	c.2686A>G	p.Asn896Asp	missense_variant	Exon 13 of 13	ENST00000673822.2	NP_001153620.1	Q8NEL9-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DDHD1	ENST00000673822.2 link	c.2686A>G	p.Asn896Asp	missense_variant	Exon 13 of 13		NM_001160148.2	ENSP00000500986.2		Q8NEL9-1

Frequencies

GnomAD3 genomes

AF:

0.0000265

AC:

AN:

150706

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000198

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:

0.00

Gnomad OTH

AF:

0.000483

GnomAD2 exomes

AF:

0.00000823

AC:

AN:

243136

AF XY:

0.00000760

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000617

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000275

AC:

AN:

1454828

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

723652

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33084

American (AMR)

AF:

0.0000687

AC:

AN:

43672

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25926

East Asian (EAS)

AF:

0.00

AC:

AN:

39332

South Asian (SAS)

AF:

0.00

AC:

AN:

85016

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53260

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5750

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1108660

Other (OTH)

AF:

0.0000166

AC:

AN:

60128

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000265

AC:

AN:

150772

Hom.:

Cov.:

AF XY:

0.0000272

AC XY:

AN XY:

73476

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41082

American (AMR)

AF:

0.000198

AC:

AN:

15142

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5148

South Asian (SAS)

AF:

0.00

AC:

AN:

4758

European-Finnish (FIN)

AF:

0.00

AC:

AN:

9988

Middle Eastern (MID)

AF:

0.00

AC:

AN:

288

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67900

Other (OTH)

AF:

0.000479

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000301

Hom.:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Dec 01, 2022

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.2686A>G (p.N896D) alteration is located in exon 13 (coding exon 13) of the DDHD1 gene. This alteration results from a A to G substitution at nucleotide position 2686, causing the asparagine (N) at amino acid position 896 to be replaced by an aspartic acid (D). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.059

BayesDel_addAF

Benign

-0.43

BayesDel_noAF

Benign

-0.67

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.0097

.;.;T;.

Eigen

Benign

-0.49

Eigen_PC

Benign

-0.38

FATHMM_MKL

Benign

0.38

LIST_S2

Benign

0.64

T;T;T;T

M_CAP

Benign

0.0057

MetaRNN

Benign

0.032

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.20

.;.;N;.

PhyloP100

1.0

PrimateAI

Benign

0.28

PROVEAN

Benign

-0.77

.;N;N;N

REVEL

Benign

0.097

Sift

Benign

0.051

.;T;D;T

Sift4G

Benign

0.37

T;T;T;T

Polyphen

0.10, 0.082

.;.;B;B

Vest4

0.060

MutPred

0.078

.;.;Loss of methylation at K894 (P = 0.0865);.;

MVP

0.068

MPC

0.50

ClinPred

0.033

GERP RS

3.6

Varity_R

0.062

gMVP

0.28

Mutation Taster

=92/8

polymorphism

(source)

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

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14-53046785-T-C

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over