14-91307150-G-C

Position:

• chr14-91307150-G-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001080414.4(CCDC88C):​c.3083C>G​(p.Ala1028Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A1028V) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CCDC88C NM_001080414.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.348

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]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.03584528).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CCDC88C	NM_001080414.4	c.3083C>G	p.Ala1028Gly	missense_variant	18/30	ENST00000389857.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CCDC88C	ENST00000389857.11	c.3083C>G	p.Ala1028Gly	missense_variant	18/30	5	NM_001080414.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.088
BayesDel_addAF	Benign	-0.37	T
BayesDel_noAF	Benign	-0.77
CADD	Benign	0.11
DANN	Benign	0.28
DEOGEN2	Benign	0.019	T
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.12	N
LIST_S2	Benign	0.41	T
M_CAP	Benign	0.0040	T
MetaRNN	Benign	0.036	T
MetaSVM	Benign	-0.96	T
MutationAssessor	Benign	0.34	N
MutationTaster	Benign	1.0	P
PrimateAI	Benign	0.17	T
PROVEAN	Benign	-0.99	N
REVEL	Benign	0.0070
Sift	Benign	0.22	T
Sift4G	Benign	0.39	T
Polyphen		0.0	B
Vest4		0.12
MutPred		0.17		Loss of MoRF binding (P = 0.1222);
MVP		0.15
MPC		0.13
ClinPred		0.020	T
GERP RS		-4.9
Varity_R		0.042
gMVP		0.11

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

Other links and lift over

dbSNP: rs1970911; hg19: chr14-91773494;