Genetic Variant CCDC74B:p.Glu296Val (chr2-130139613-T-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001258307.2(CCDC74B):c.887A>T(p.Glu296Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000088 in 1,613,316 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000090 ( 0 hom. )

Consequence

CCDC74B
NM_001258307.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.02

Variant links:

Genes affected

CCDC74B (HGNC:25267): (coiled-coil domain containing 74B)

CCDC74B links:

MED15P9 (HGNC:):

MED15P9 links:

MED15P9 (HGNC:44130): (mediator complex subunit 15 pseudogene 9)

MED15P9 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCDC74B	NM_001258307.2 link	c.887A>T	p.Glu296Val	missense_variant	Exon 8 of 8	ENST00000409943.8	NP_001245236.1	Q96LY2-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CCDC74B	ENST00000409943.8 link	c.887A>T	p.Glu296Val	missense_variant	Exon 8 of 8	1	NM_001258307.2	ENSP00000386294.3		Q96LY2-2

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152256

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:

0.000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000601

AC:

AN:

249492

Hom.:

AF XY:

0.0000443

AC XY:

AN XY:

135330

show subpopulations

Gnomad AFR exome

AF:

0.0000625

Gnomad AMR exome

AF:

0.0000580

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000107

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000904

AC:

132

AN:

1460942

Hom.:

Cov.:

AF XY:

0.0000908

AC XY:

AN XY:

726772

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000112

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000108

Gnomad4 OTH exome

AF:

0.0000994

GnomAD4 genome

AF:

0.0000656

AC:

AN:

152374

Hom.:

Cov.:

AF XY:

0.0000671

AC XY:

AN XY:

74520

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:

0.000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000135

Hom.:

Bravo

AF:

0.0000718

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000659

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 12, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1085A>T (p.E362V) alteration is located in exon 8 (coding exon 8) of the CCDC74B gene. This alteration results from a A to T substitution at nucleotide position 1085, causing the glutamic acid (E) at amino acid position 362 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

0.73

BayesDel_addAF

Benign

-0.058

BayesDel_noAF

Benign

-0.12

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.052

.;T

Eigen

Uncertain

0.42

Eigen_PC

Uncertain

0.32

FATHMM_MKL

Uncertain

0.86

LIST_S2

Benign

0.73

T;T

M_CAP

Pathogenic

0.33

MetaRNN

Uncertain

0.50

D;D

MetaSVM

Benign

-0.52

MutationAssessor

Benign

1.6

.;L

PrimateAI

Uncertain

0.49

PROVEAN

Uncertain

-4.0

D;D

REVEL

Benign

0.26

Sift

Uncertain

0.0020

D;D

Sift4G

Uncertain

0.0020

D;D

Polyphen

1.0

D;D

Vest4

0.59

MVP

0.61

MPC

0.64

ClinPred

0.91

GERP RS

4.2

Varity_R

0.46

gMVP

0.16

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

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