chr16-726042-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_001378030.1(CCDC78):c.104G>A(p.Gly35Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000207 in 1,548,406 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000072 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000015 ( 0 hom. )

Consequence

CCDC78
NM_001378030.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: -0.456

Publications

2 publications found

Variant links:

Genes affected

CCDC78 (HGNC:14153): (coiled-coil domain containing 78) Involved in de novo centriole assembly involved in multi-ciliated epithelial cell differentiation and skeletal muscle contraction. Located in several cellular components, including centriole; deuterosome; and sarcolemma. Implicated in centronuclear myopathy 4. [provided by Alliance of Genome Resources, Apr 2022]

CCDC78 Gene-Disease associations (from GenCC):

congenital myopathy with internal nuclei and atypical cores
Inheritance: AD Classification: SUPPORTIVE, LIMITED Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae)
centronuclear myopathy
Inheritance: AD Classification: LIMITED Submitted by: ClinGen

CCDC78 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.052359313).

BS2

High AC in GnomAd4 at 11 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001378030.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
CCDC78	NM_001378030.1	MANE Select	c.104G>A	p.Gly35Asp	missense	Exon 2 of 14	NP_001364959.1
CCDC78	NM_001031737.3		c.104G>A	p.Gly35Asp	missense	Exon 2 of 14	NP_001026907.2
CCDC78	NM_001378031.1		c.104G>A	p.Gly35Asp	missense	Exon 2 of 12	NP_001364960.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
CCDC78	ENST00000345165.10	TSL:5 MANE Select	c.104G>A	p.Gly35Asp	missense	Exon 2 of 14	ENSP00000316851.5
CCDC78	ENST00000293889.10	TSL:1	c.104G>A	p.Gly35Asp	missense	Exon 2 of 14	ENSP00000293889.6
CCDC78	ENST00000650995.1		c.326G>A	p.Gly109Asp	missense	Exon 1 of 2	ENSP00000498860.1

Frequencies

GnomAD3 genomes

AF:

0.0000723

AC:

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000241

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000194

AC:

AN:

154720

AF XY:

0.0000245

show subpopulations

Gnomad AFR exome

AF:

0.000345

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:

0.0000150

AC:

AN:

1396234

Hom.:

Cov.:

AF XY:

0.0000131

AC XY:

AN XY:

688632

show subpopulations

African (AFR)

AF:

0.000380

AC:

AN:

31596

American (AMR)

AF:

0.00

AC:

AN:

35628

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25142

East Asian (EAS)

AF:

0.000112

AC:

AN:

35746

South Asian (SAS)

AF:

0.00

AC:

AN:

79252

European-Finnish (FIN)

AF:

0.00

AC:

AN:

46502

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5686

European-Non Finnish (NFE)

AF:

0.00000371

AC:

AN:

1078720

Other (OTH)

AF:

0.0000173

AC:

AN:

57962

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000723

AC:

AN:

152172

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

74336

show subpopulations

African (AFR)

AF:

0.000241

AC:

AN:

41450

American (AMR)

AF:

0.00

AC:

AN:

15280

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68014

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.520

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000666

Hom.:

Bravo

AF:

0.0000642

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 27, 2017

Athena Diagnostics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Inborn genetic diseases

Uncertain:1

Aug 29, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.104G>A (p.G35D) alteration is located in exon 2 (coding exon 2) of the CCDC78 gene. This alteration results from a G to A substitution at nucleotide position 104, causing the glycine (G) at amino acid position 35 to be replaced by an aspartic acid (D). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.

Congenital myopathy with internal nuclei and atypical cores

Uncertain:1

Dec 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with aspartic acid, which is acidic and polar, at codon 35 of the CCDC78 protein (p.Gly35Asp). This variant is present in population databases (no rsID available, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with CCDC78-related conditions. ClinVar contains an entry for this variant (Variation ID: 447005). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt CCDC78 protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.50

BayesDel_noAF

Benign

-0.64

CADD

Benign

3.0

(source)

DANN

Benign

0.62

DEOGEN2

Benign

0.015

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.3

FATHMM_MKL

Benign

0.042

LIST_S2

Benign

0.43

M_CAP

Benign

0.025

MetaRNN

Benign

0.052

MetaSVM

Benign

-0.99

MutationAssessor

Benign

0.83

PhyloP100

-0.46

PrimateAI

Benign

0.41

PROVEAN

Benign

-1.6

REVEL

Benign

0.083

Sift

Benign

0.25

Sift4G

Benign

0.11

Polyphen

0.010

Vest4

0.16

MVP

0.048

MPC

0.43

ClinPred

0.034

GERP RS

-3.6

PromoterAI

-0.020

Neutral

(source)

Varity_R

0.055

gMVP

0.029

Mutation Taster

=98/2

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over