Genetic Variant DPH6:p.Tyr121Cys (chr15-35454771-T-C) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_080650.4(DPH6):c.362A>G(p.Tyr121Cys) variant causes a missense change. The variant allele was found at a frequency of 0.00000683 in 1,609,618 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

DPH6
NM_080650.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.72

Variant links:

Genes affected

DPH6 (HGNC:30543): (diphthamine biosynthesis 6) Enables diphthine-ammonia ligase activity. Predicted to be involved in peptidyl-diphthamide biosynthetic process from peptidyl-histidine. Located in nucleolus and nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

DPH6 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.976

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DPH6	NM_080650.4 link	c.362A>G	p.Tyr121Cys	missense_variant	Exon 4 of 9	ENST00000256538.9	NP_542381.1	Q7L8W6-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
DPH6	ENST00000256538.9 link	c.362A>G	p.Tyr121Cys	missense_variant	Exon 4 of 9	1	NM_080650.4	ENSP00000256538.4	Q7L8W6-1
DPH6	ENST00000561411.1 link	c.218A>G	p.Tyr73Cys	missense_variant	Exon 3 of 6	4		ENSP00000453967.1	H0YND7
DPH6	ENST00000559784.5 link	n.323A>G		non_coding_transcript_exon_variant	Exon 3 of 5	3
DPH6	ENST00000558266.5 link	c.-11A>G		upstream_gene_variant		5		ENSP00000454015.1	H0YNH5

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152136

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:

0.00

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

GnomAD3 exomes

AF:

0.0000202

AC:

AN:

247726

Hom.:

AF XY:

0.0000149

AC XY:

AN XY:

133958

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000597

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000110

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000888

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000618

AC:

AN:

1457482

Hom.:

Cov.:

AF XY:

0.00000552

AC XY:

AN XY:

724712

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000454

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000508

Gnomad4 SAS exome

AF:

0.0000236

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152136

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74328

show subpopulations

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:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000447

Hom.:

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 01, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.362A>G (p.Y121C) alteration is located in exon 4 (coding exon 4) of the DPH6 gene. This alteration results from a A to G substitution at nucleotide position 362, causing the tyrosine (Y) at amino acid position 121 to be replaced by a cysteine (C). 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

Pathogenic

0.92

BayesDel_addAF

Uncertain

0.15

BayesDel_noAF

Pathogenic

0.20

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.38

T;T

Eigen

Pathogenic

0.96

Eigen_PC

Pathogenic

0.85

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Pathogenic

1.0

D;D

M_CAP

Benign

0.075

MetaRNN

Pathogenic

0.98

D;D

MetaSVM

Uncertain

0.034

MutationAssessor

Pathogenic

3.8

H;.

PrimateAI

Uncertain

0.68

PROVEAN

Pathogenic

-9.0

D;D

REVEL

Uncertain

0.58

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;.

Polyphen

1.0

D;.

Vest4

0.96

MutPred

0.94

Loss of MoRF binding (P = 0.0927);.;

MVP

0.65

MPC

0.73

ClinPred

1.0

GERP RS

4.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.98

gMVP

0.93

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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