14-53046782-A-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBS1_Supporting

The NM_001160148.2(DDHD1):c.2689T>A(p.Leu897Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000405 in 1,606,114 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 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000041 ( 0 hom. )

Consequence

DDHD1
NM_001160148.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.779

Publications

2 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 -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.011638373).

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.000033 (5/151434) while in subpopulation EAS AF = 0.000969 (5/5162). AF 95% confidence interval is 0.000381. There are 0 homozygotes in GnomAd4. There are 3 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DDHD1	NM_001160148.2 link	c.2689T>A	p.Leu897Ile	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.2689T>A	p.Leu897Ile	missense_variant	Exon 13 of 13		NM_001160148.2	ENSP00000500986.2		Q8NEL9-1

Frequencies

GnomAD3 genomes

AF:

0.0000330

AC:

AN:

151332

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000966

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000904

AC:

AN:

243286

AF XY:

0.0000835

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00125

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000412

AC:

AN:

1454680

Hom.:

Cov.:

AF XY:

0.0000401

AC XY:

AN XY:

723588

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33056

American (AMR)

AF:

0.00

AC:

AN:

43648

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25934

East Asian (EAS)

AF:

0.00137

AC:

AN:

39358

South Asian (SAS)

AF:

0.00

AC:

AN:

85028

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53254

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5748

European-Non Finnish (NFE)

AF:

9.02e-7

AC:

AN:

1108540

Other (OTH)

AF:

0.0000832

AC:

AN:

60114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.473

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000330

AC:

AN:

151434

Hom.:

Cov.:

AF XY:

0.0000406

AC XY:

AN XY:

73958

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41252

American (AMR)

AF:

0.00

AC:

AN:

15230

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000969

AC:

AN:

5162

South Asian (SAS)

AF:

0.00

AC:

AN:

4800

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10262

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67952

Other (OTH)

AF:

0.00

AC:

AN:

2100

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.465

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000252

Hom.:

Bravo

AF:

0.0000642

ExAC

AF:

0.0000741

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Apr 30, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.2689T>A (p.L897I) alteration is located in exon 13 (coding exon 13) of the DDHD1 gene. This alteration results from a T to A substitution at nucleotide position 2689, causing the leucine (L) at amino acid position 897 to be replaced by an isoleucine (I). 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

0.065

BayesDel_addAF

Benign

-0.45

BayesDel_noAF

Benign

-0.46

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.0077

.;.;T;.

Eigen

Benign

-0.088

Eigen_PC

Benign

-0.15

FATHMM_MKL

Benign

0.25

LIST_S2

Benign

0.82

T;T;T;T

M_CAP

Benign

0.0089

MetaRNN

Benign

0.012

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.5

.;.;L;.

PhyloP100

0.78

PrimateAI

Benign

0.36

PROVEAN

Benign

-0.33

.;N;N;N

REVEL

Benign

0.086

Sift

Uncertain

0.017

.;D;D;D

Sift4G

Uncertain

0.026

D;D;D;D

Polyphen

0.92, 0.90

.;.;P;P

Vest4

0.18

MVP

0.093

MPC

0.51

ClinPred

0.089

GERP RS

2.4

Varity_R

0.044

gMVP

0.14

Mutation Taster

=99/1

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

14-53046782-A-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over