chrX-154765474-A-G

Variant names:

• chrX-154765474-A-G
• rs121912296
• NM_001363.5:c.115A>G

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM1 PM2 PP3

The NM_001363.5(DKC1):​c.115A>G​(p.Lys39Glu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as not provided (no stars).

• Frequency: Genomes: not found (cov: 24)
• Consequence: DKC1 NM_001363.5 missense
• Clinical Significance: not provided no classification provided O:2
• Conservation: PhyloP100: 5.18
• Publications: 7 publications found

Genes affected

DKC1 (HGNC:2890): (dyskerin pseudouridine synthase 1) This gene functions in two distinct complexes. It plays an active role in telomerase stabilization and maintenance, as well as recognition of snoRNAs containing H/ACA sequences which provides stability during biogenesis and assembly into H/ACA small nucleolar RNA ribonucleoproteins (snoRNPs). This gene is highly conserved and widely expressed, and may play additional roles in nucleo-cytoplasmic shuttling, DNA damage response, and cell adhesion. Mutations have been associated with X-linked dyskeratosis congenita. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2014]

DKC1 Gene-Disease associations (from GenCC):

• DKC1-related disorder

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
• dyskeratosis congenita, X-linked

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P
• dyskeratosis congenita

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Hoyeraal-Hreidarsson syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM1: In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 5 uncertain in NM_001363.5
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.802

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001363.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DKC1	NM_001363.5	MANE Select	c.115A>G	p.Lys39Glu	missense	Exon 3 of 15	NP_001354.1
	DKC1	NM_001142463.3		c.115A>G	p.Lys39Glu	missense	Exon 3 of 15	NP_001135935.1
	DKC1	NM_001288747.2		c.115A>G	p.Lys39Glu	missense	Exon 3 of 14	NP_001275676.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DKC1	ENST00000369550.10	TSL:1 MANE Select	c.115A>G	p.Lys39Glu	missense	Exon 3 of 15	ENSP00000358563.5
	DKC1	ENST00000620277.4	TSL:1	n.339A>G		non_coding_transcript_exon	Exon 3 of 14
	DKC1	ENST00000696575.1		c.115A>G	p.Lys39Glu	missense	Exon 3 of 15	ENSP00000512730.1

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 24

Alfa AF: 0.0000661 Hom.: 0

ClinVar

Significance: not provided

Submissions summary: Other:2

Revision: no classification provided

Submissions by phenotype

Dyskeratosis congenita, X-linked Other:2

UniProtKB/Swiss-Prot

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

GeneReviews

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Pathogenic	0.43	D
BayesDel_noAF	Pathogenic	0.38
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.36	T
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Benign	0.83	T
M_CAP	Pathogenic	0.68	D
MetaRNN	Pathogenic	0.80	D
MetaSVM	Benign	-0.91	T
MutationAssessor	Benign	1.5	L
PhyloP100		5.2
PrimateAI	Uncertain	0.64	T
PROVEAN	Benign	-1.8	N
REVEL	Uncertain	0.61
Sift	Benign	0.14	T
Sift4G	Benign	0.24	T
Polyphen		0.0	B
Vest4		0.60
MutPred		0.69		Loss of ubiquitination at K39 (P = 0.013)
MVP		1.0
MPC		1.8
ClinPred		0.73	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.50
gMVP		0.84
Mutation Taster		=56/44	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
Splicevardb		2.0
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

Other links and lift over

dbSNP: rs121912296; hg19: chrX-153993749;