Genetic Variant CCDC137:p.Ala2Val (chr17-81666771-C-T) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS2

The NM_199287.3(CCDC137):c.5C>T(p.Ala2Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000109 in 1,466,630 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A2S) has been classified as Uncertain significance.

Frequency

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

Exomes 𝑓: 0.000011 ( 0 hom. )

Consequence

CCDC137
NM_199287.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -1.65

Publications

1 publications found

Variant links:

Genes affected

CCDC137 (HGNC:33451): (coiled-coil domain containing 137) Enables RNA binding activity. Located in chromosome and fibrillar center. [provided by Alliance of Genome Resources, Apr 2022]

CCDC137 links:

OXLD1 (HGNC:27901): (oxidoreductase like domain containing 1)

OXLD1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BS2

High AC in GnomAdExome4 at 14 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCDC137	NM_199287.3 link	c.5C>T	p.Ala2Val	missense_variant	Exon 1 of 6	ENST00000329214.13	NP_954981.1	Q6PK04
OXLD1	NM_001039842.3 link	c.-194G>A		upstream_gene_variant		ENST00000374741.4	NP_001034931.1	Q5BKU9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CCDC137	ENST00000329214.13 link	c.5C>T	p.Ala2Val	missense_variant	Exon 1 of 6	1	NM_199287.3	ENSP00000329360.8		Q6PK04
OXLD1	ENST00000374741.4 link	c.-194G>A		upstream_gene_variant		1	NM_001039842.3	ENSP00000363873.3		Q5BKU9

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152184

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:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000156

AC:

AN:

128522

AF XY:

0.0000138

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000107

AC:

AN:

1314446

Hom.:

Cov.:

AF XY:

0.00000926

AC XY:

AN XY:

647670

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26404

American (AMR)

AF:

0.00

AC:

AN:

23994

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19626

East Asian (EAS)

AF:

0.0000316

AC:

AN:

31618

South Asian (SAS)

AF:

0.0000595

AC:

AN:

67232

European-Finnish (FIN)

AF:

0.00

AC:

AN:

41288

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4920

European-Non Finnish (NFE)

AF:

0.00000574

AC:

AN:

1045732

Other (OTH)

AF:

0.0000559

AC:

AN:

53632

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.461

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152184

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74346

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41446

American (AMR)

AF:

0.00

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.000207

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.478

Hom.:

6435

Bravo

AF:

0.0000264

ExAC

AF:

0.00000834

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 04, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.5C>T (p.A2V) alteration is located in exon 1 (coding exon 1) of the CCDC137 gene. This alteration results from a C to T substitution at nucleotide position 5, causing the alanine (A) at amino acid position 2 to be replaced by a valine (V). 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

0.57

BayesDel_addAF

Benign

-0.054

BayesDel_noAF

Benign

-0.32

CADD

Benign

(source)

DANN

Benign

0.97

DEOGEN2

Benign

0.00089

T;T

Eigen

Benign

-0.68

Eigen_PC

Benign

-0.87

FATHMM_MKL

Benign

0.32

LIST_S2

Benign

0.39

.;T

M_CAP

Uncertain

0.15

MetaRNN

Benign

0.20

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.4

M;.

PhyloP100

-1.7

PrimateAI

Uncertain

0.75

PROVEAN

Benign

-1.0

N;.

REVEL

Benign

0.099

Sift

Pathogenic

0.0

D;.

Sift4G

Pathogenic

0.0

D;D

Polyphen

0.99

D;.

Vest4

0.19

MutPred

0.40

Gain of catalytic residue at A2 (P = 0.3286);Gain of catalytic residue at A2 (P = 0.3286);

MVP

0.22

MPC

0.060

ClinPred

0.80

GERP RS

0.87

PromoterAI

0.019

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.095

gMVP

0.42

Mutation Taster

=98/2

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.23

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.23

Position offset: -2

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

Publications

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17-81666771-C-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over