Genetic Variant NM_138803.4:c.1465C>T (chr2-158178902-G-A) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_138803.4(CCDC148):c.1465C>T(p.Arg489Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000353 in 1,612,984 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 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000036 ( 0 hom. )

Consequence

CCDC148
NM_138803.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.08

Variant links:

Genes affected

CCDC148 (HGNC:25191): (coiled-coil domain containing 148)

CCDC148 links:

CCDC148-AS1 (HGNC:44134): (CCDC148 antisense RNA 1)

CCDC148-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.789

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCDC148	NM_138803.4 link	c.1465C>T	p.Arg489Trp	missense_variant	Exon 12 of 14	ENST00000283233.10	NP_620158.3	Q8NFR7-1
CCDC148	NM_001301684.2 link	c.1027C>T	p.Arg343Trp	missense_variant	Exon 10 of 12		NP_001288613.1	Q8NFR7
CCDC148-AS1	NR_038850.1 link	n.221+790G>A		intron_variant	Intron 3 of 4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CCDC148	ENST00000283233.10 link	c.1465C>T	p.Arg489Trp	missense_variant	Exon 12 of 14	1	NM_138803.4	ENSP00000283233.5		Q8NFR7-1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

151974

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000725

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:

0.0000359

AC:

AN:

250820

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135570

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000174

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.0000356

AC:

AN:

1461010

Hom.:

Cov.:

AF XY:

0.0000399

AC XY:

AN XY:

726804

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000179

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000315

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000329

AC:

AN:

151974

Hom.:

Cov.:

AF XY:

0.0000270

AC XY:

AN XY:

74200

show subpopulations

Gnomad4 AFR

AF:

0.0000725

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:

0.0000865

Hom.:

Bravo

AF:

0.0000378

ExAC

AF:

0.0000412

AC:

EpiCase

AF:

0.0000546

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 15, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1465C>T (p.R489W) alteration is located in exon 12 (coding exon 12) of the CCDC148 gene. This alteration results from a C to T substitution at nucleotide position 1465, causing the arginine (R) at amino acid position 489 to be replaced by a tryptophan (W). 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

0.18

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Benign

-0.17

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.24

T;.

Eigen

Uncertain

0.31

Eigen_PC

Uncertain

0.29

FATHMM_MKL

Benign

0.73

LIST_S2

Uncertain

0.93

D;D

M_CAP

Benign

0.037

MetaRNN

Pathogenic

0.79

D;D

MetaSVM

Benign

-0.97

MutationAssessor

Uncertain

2.7

M;.

PrimateAI

Benign

0.43

PROVEAN

Pathogenic

-4.9

D;D

REVEL

Benign

0.24

Sift

Uncertain

0.0030

D;D

Sift4G

Uncertain

0.014

D;D

Polyphen

1.0

D;D

Vest4

0.75

MVP

0.44

MPC

0.076

ClinPred

0.88

GERP RS

3.7

Varity_R

0.18

gMVP

0.43

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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