chr14-91272686-G-A

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_001080414.4(CCDC88C):c.6026C>T(p.Pro2009Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00109 in 1,611,648 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. P2009P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00072 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0011 ( 3 hom. )

Consequence

CCDC88C
NM_001080414.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:8

Conservation

PhyloP100: 9.42

Variant links:

Genes affected

CCDC88C (HGNC:19967): (coiled-coil domain containing 88C) This gene encodes a ubiquitously expressed coiled-coil domain-containing protein that interacts with the dishevelled protein and is a negative regulator of the Wnt signalling pathway. The protein encoded by this gene has a PDZ-domain binding motif in its C-terminus with which it interacts with the dishevelled protein. Dishevelled is a scaffold protein involved in the regulation of the Wnt signaling pathway. The Wnt signaling pathway plays an important role in embryonic development, tissue maintenance, and cancer progression. Mutations in this gene cause autosomal recessive, primary non-syndromic congenital hydrocephalus; a condition characterized by excessive accumulation of cerebrospinal fluid in the ventricles of the brain. [provided by RefSeq, Jan 2013]

CCDC88C links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.2106382).

BS2

High Homozygotes in GnomAdExome4 at 3 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCDC88C	NM_001080414.4 link	c.6026C>T	p.Pro2009Leu	missense_variant	Exon 30 of 30	ENST00000389857.11	NP_001073883.2	Q9P219-1B4DZB8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CCDC88C	ENST00000389857.11 link	c.6026C>T	p.Pro2009Leu	missense_variant	Exon 30 of 30	5	NM_001080414.4	ENSP00000374507.6		Q9P219-1
CCDC88C	ENST00000556726 link	c.*1860C>T		3_prime_UTR_variant	Exon 7 of 7	5		ENSP00000452406.1		H0YJX5

Frequencies

GnomAD3 genomes

AF:

0.000716

AC:

109

AN:

152218

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000458

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000327

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000188

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00119

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000602

AC:

146

AN:

242694

Hom.:

AF XY:

0.000632

AC XY:

AN XY:

132940

show subpopulations

Gnomad AFR exome

AF:

0.000342

Gnomad AMR exome

AF:

0.000232

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000280

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000723

Gnomad NFE exome

AF:

0.00101

Gnomad OTH exome

AF:

0.000504

GnomAD4 exome

AF:

0.00113

AC:

1643

AN:

1459312

Hom.:

Cov.:

AF XY:

0.00109

AC XY:

792

AN XY:

726006

show subpopulations

Gnomad4 AFR exome

AF:

0.000448

Gnomad4 AMR exome

AF:

0.000246

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000126

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.000642

Gnomad4 NFE exome

AF:

0.00137

Gnomad4 OTH exome

AF:

0.000796

GnomAD4 genome

AF:

0.000722

AC:

110

AN:

152336

Hom.:

Cov.:

AF XY:

0.000671

AC XY:

AN XY:

74488

show subpopulations

Gnomad4 AFR

AF:

0.000457

Gnomad4 AMR

AF:

0.000327

Gnomad4 ASJ

AF:

0.000288

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000188

Gnomad4 NFE

AF:

0.00121

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.00111

Hom.:

Bravo

AF:

0.000654

TwinsUK

AF:

0.00216

AC:

ALSPAC

AF:

0.00285

AC:

ESP6500AA

AF:

0.000264

AC:

ESP6500EA

AF:

0.000491

AC:

ExAC

AF:

0.000540

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000763

EpiControl

AF:

0.000711

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:5

Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Oct 01, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Nov 11, 2024	This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 2009 of the CCDC88C protein (p.Pro2009Leu). This variant is present in population databases (rs201940261, gnomAD 0.1%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with CCDC88C-related conditions. ClinVar contains an entry for this variant (Variation ID: 444336). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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. -
Uncertain significance, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jun 14, 2023	Reported in the heterozygous state in a patient with cerebellar ataxia (Ghorbani et al., 2022); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 35401678) -
Uncertain significance, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -

Spinocerebellar ataxia type 40

Uncertain:1

Uncertain significance, no assertion criteria provided

research

O&I group, Department of Genetics, University Medical Center of Groningen

Jul 22, 2021

- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 31, 2022

The c.6026C>T (p.P2009L) alteration is located in exon 30 (coding exon 30) of the CCDC88C gene. This alteration results from a C to T substitution at nucleotide position 6026, causing the proline (P) at amino acid position 2009 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Hydrocephalus, nonsyndromic, autosomal recessive 1;C4518336:Spinocerebellar ataxia type 40

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 31, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Uncertain

-0.070

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.26

T;T

Eigen

Uncertain

0.24

Eigen_PC

Benign

0.12

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.89

D;D

M_CAP

Uncertain

0.17

MetaRNN

Benign

0.21

T;T

MetaSVM

Uncertain

0.16

MutationAssessor

Pathogenic

2.9

.;M

PrimateAI

Uncertain

0.52

PROVEAN

Pathogenic

-4.8

.;D

REVEL

Uncertain

0.51

Sift

Pathogenic

0.0

.;D

Sift4G

Uncertain

0.0050

D;D

Polyphen

1.0

.;D

Vest4

0.59

MVP

0.75

MPC

0.56

ClinPred

0.15

GERP RS

4.1

Varity_R

0.45

gMVP

0.40

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