15-49634557-C-T

Position:

• chr15-49634557-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001144955.2(DTWD1):​c.430C>T​(p.Pro144Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00000658 in 152,070 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: DTWD1 NM_001144955.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.24

Genes affected

DTWD1 (HGNC:30926): (DTW domain containing 1) Enables tRNA-uridine aminocarboxypropyltransferase activity. Involved in tRNA modification. Located in nucleus. [provided by Alliance of Genome Resources, Apr 2022]

DTWD1 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DTWD1	NM_001144955.2	c.430C>T	p.Pro144Ser	missense_variant	4/5	ENST00000403028.8	NP_001138427.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DTWD1	ENST00000403028.8	c.430C>T	p.Pro144Ser	missense_variant	4/5	1	NM_001144955.2	ENSP00000385399.3

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 152070 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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 152070 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74282

Gnomad4 AFR AF: 0.00

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: 0.0000147

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 26, 2024

The c.430C>T (p.P144S) alteration is located in exon 5 (coding exon 3) of the DTWD1 gene. This alteration results from a C to T substitution at nucleotide position 430, causing the proline (P) at amino acid position 144 to be replaced by a serine (S). 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	0.26
BayesDel_addAF	Uncertain	0.091	D
BayesDel_noAF	Benign	-0.11
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.10	T;T;.;.;T
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.51
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.77	.;.;T;T;T
M_CAP	Benign	0.028	D
MetaRNN	Uncertain	0.44	T;T;T;T;T
MetaSVM	Benign	-0.99	T
MutationAssessor	Uncertain	2.2	M;M;.;.;M
PrimateAI	Uncertain	0.50	T
PROVEAN	Uncertain	-3.7	D;D;N;D;D
REVEL	Benign	0.15
Sift	Benign	0.18	T;T;T;T;T
Sift4G	Benign	0.17	T;T;D;T;T
Polyphen		0.98	D;D;.;.;D
Vest4		0.47
MutPred		0.60		Gain of relative solvent accessibility (P = 0.09);Gain of relative solvent accessibility (P = 0.09);.;.;Gain of relative solvent accessibility (P = 0.09);
MVP		0.46
MPC		0.27
ClinPred		0.99	D
GERP RS		5.0
Varity_R		0.28
gMVP		0.57

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs2078975242; hg19: chr15-49926754;