Genetic Variant DCPS:p.Thr316Lys (chr11-126345546-C-A) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PM5

The NM_014026.6(DCPS):c.947C>A(p.Thr316Lys) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,646 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. T316M) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

DCPS
NM_014026.6 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.75

Publications

0 publications found

Variant links:

Genes affected

DCPS (HGNC:29812): (decapping enzyme, scavenger) This gene encodes a member of the histidine triad family of pyrophosphatases that removes short mRNA fragments containing the 5′ mRNA cap structure, which appear in the 3′ → 5′ mRNA decay pathway, following deadenylation and exosome-mediated turnover. This enzyme hydrolyzes the triphosphate linkage of the cap structure (7-methylguanosine nucleoside triphosphate) to yield 7-methylguanosine monophosphate and nucleoside diphosphate. It protects the cell from the potentially toxic accumulation of these short, capped mRNA fragments, and regulates the activity of other cap-binding proteins, which are inhibited by their accumulation. It also acts as a transcript-specific modulator of pre-mRNA splicing and microRNA turnover. [provided by RefSeq, Apr 2017]

DCPS links:

GSEC (HGNC:48645): (G-quadruplex forming sequence containing lncRNA)

GSEC links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr11-126345546-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 372235.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DCPS	NM_014026.6 link	c.947C>A	p.Thr316Lys	missense_variant	Exon 6 of 6	ENST00000263579.5	NP_054745.1	Q96C86A0A384MTI8
DCPS	NM_001350236.2 link	c.968C>A	p.Thr323Lys	missense_variant	Exon 6 of 6		NP_001337165.1
GSEC	NR_033839.1 link	n.147-3224G>T		intron_variant	Intron 1 of 1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DCPS	ENST00000263579.5 link	c.947C>A	p.Thr316Lys	missense_variant	Exon 6 of 6	1	NM_014026.6	ENSP00000263579.4		Q96C86

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1461646

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727152

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000504

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53180

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1112008

Other (OTH)

AF:

0.00

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.442

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.36

BayesDel_addAF

Uncertain

0.071

BayesDel_noAF

Benign

-0.14

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Uncertain

0.52

D;.

Eigen

Uncertain

0.19

Eigen_PC

Benign

0.14

FATHMM_MKL

Uncertain

0.83

LIST_S2

Benign

0.83

T;T

M_CAP

Benign

0.032

MetaRNN

Uncertain

0.74

D;D

MetaSVM

Benign

-0.73

MutationAssessor

Uncertain

2.7

M;.

PhyloP100

3.7

PrimateAI

Benign

0.38

PROVEAN

Uncertain

-4.3

D;.

REVEL

Benign

0.26

Sift

Uncertain

0.0030

D;.

Sift4G

Uncertain

0.0050

D;.

Polyphen

0.94

P;.

Vest4

0.50

MutPred

0.70

Gain of sheet (P = 0.0221);.;

MVP

0.67

MPC

0.19

ClinPred

0.97

GERP RS

4.5

Varity_R

0.69

gMVP

0.93

Mutation Taster

=68/32

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over