8-38233110-C-A

Variant names:

• chr8-38233110-C-A
• rs756560473
• NM_015214.3:c.116C>A

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_015214.3(DDHD2):​c.116C>A​(p.Pro39Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000428 in 1,613,926 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. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P39L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000046 (0 hom.)
• Consequence: DDHD2 NM_015214.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.11
• Publications: 2 publications found

Genes affected

DDHD2 (HGNC:29106): (DDHD domain containing 2) This gene encodes a phospholipase enzyme containing sterile-alpha-motif (SAM), WWE, and DDHD domains. This protein participates in membrane trafficking between the endoplastic reticulum and the Golgi body. Mutations in this gene can cause autosomal recessive spastic paraplegia 54. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2013]

DDHD2 Gene-Disease associations (from GenCC):

• hereditary spastic paraplegia 54

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2907465).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015214.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DDHD2	NM_015214.3	MANE Select	c.116C>A	p.Pro39Gln	missense	Exon 2 of 18	NP_056029.2	O94830-1
	DDHD2	NM_001164232.2		c.116C>A	p.Pro39Gln	missense	Exon 2 of 18	NP_001157704.1	O94830-1
	DDHD2	NM_001362911.2		c.116C>A	p.Pro39Gln	missense	Exon 2 of 18	NP_001349840.1	O94830-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DDHD2	ENST00000397166.7	TSL:2 MANE Select	c.116C>A	p.Pro39Gln	missense	Exon 2 of 18	ENSP00000380352.2	O94830-1
	DDHD2	ENST00000853787.1		c.116C>A	p.Pro39Gln	missense	Exon 2 of 18	ENSP00000523846.1
	DDHD2	ENST00000520272.6	TSL:2	c.116C>A	p.Pro39Gln	missense	Exon 2 of 18	ENSP00000429932.2	O94830-1

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152146 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

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: 0.0000294

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000199 AC: 5 AN: 251454 AF XY: 0.0000147

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000264

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000458 AC: 67 AN: 1461780 Hom.: 0 Cov.: 31 AF XY: 0.0000495 AC XY: 36 AN XY: 727196

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39698

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000585 AC: 65 AN: 1111912

Other (OTH) AF: 0.00 AC: 0 AN: 60390

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152146 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74326

African (AFR) AF: 0.00 AC: 0 AN: 41426

American (AMR) AF: 0.00 AC: 0 AN: 15258

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5198

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10606

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000294 AC: 2 AN: 68038

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.0000564 Hom.: 0

Bravo AF: 0.0000113

ExAC AF: 0.0000247 AC: 3

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.31
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.30	T
Eigen	Uncertain	0.55
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Uncertain	0.85	D
LIST_S2	Uncertain	0.90	D
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.29	T
MetaSVM	Benign	-0.58	T
MutationAssessor	Uncertain	2.0	M
PhyloP100		3.1
PrimateAI	Uncertain	0.52	T
PROVEAN	Pathogenic	-5.7	D
REVEL	Benign	0.21
Sift	Benign	0.032	D
Sift4G	Benign	0.13	T
Polyphen		0.74	P
Vest4		0.49
MVP		0.66
MPC		0.27
ClinPred		0.99	D
GERP RS		5.5
Varity_R		0.22
gMVP		0.61
Mutation Taster		=90/10	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs756560473; hg19: chr8-38090628; COSMIC: COSV68158447;