chr3-56563846-T-C

Position:

• chr3-56563846-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001141947.3(CCDC66):​c.265T>C​(p.Phe89Leu) 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. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CCDC66 NM_001141947.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0820

Genes affected

CCDC66 (HGNC:27709): (coiled-coil domain containing 66) Enables microtubule binding activity. Involved in cilium assembly; microtubule bundle formation; and regulation of protein localization to cilium. Located in several cellular components, including Flemming body; microtubule cytoskeleton; and photoreceptor inner segment. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.08258909).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CCDC66	NM_001141947.3	c.265T>C	p.Phe89Leu	missense_variant	4/18	ENST00000394672.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CCDC66	ENST00000394672.8	c.265T>C	p.Phe89Leu	missense_variant	4/18	1	NM_001141947.3	A2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 29, 2023

The c.265T>C (p.F89L) alteration is located in exon 4 (coding exon 4) of the CCDC66 gene. This alteration results from a T to C substitution at nucleotide position 265, causing the phenylalanine (F) at amino acid position 89 to be replaced by a leucine (L). 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	Uncertain	0.48
BayesDel_addAF	Uncertain	0.048	T
BayesDel_noAF	Benign	-0.17
CADD	Benign	16
DANN	Benign	0.82
DEOGEN2	Benign	0.012	T;T;.
Eigen	Benign	-0.66
Eigen_PC	Benign	-0.56
FATHMM_MKL	Benign	0.32	N
LIST_S2	Benign	0.68	T;T;T
M_CAP	Uncertain	0.20	D
MetaRNN	Benign	0.083	T;T;T
MetaSVM	Uncertain	0.73	D
MutationAssessor	Benign	1.7	.;L;.
MutationTaster	Benign	0.99	N;N;N;N
PrimateAI	Benign	0.36	T
PROVEAN	Benign	-1.6	N;N;N
REVEL	Uncertain	0.34
Sift	Benign	0.76	T;T;T
Sift4G	Benign	0.87	T;T;T
Polyphen		0.0090	.;B;.
Vest4		0.073, 0.088
MutPred		0.19		Loss of catalytic residue at F89 (P = 0.0408);Loss of catalytic residue at F89 (P = 0.0408);.;
MVP		0.44
MPC		0.017
ClinPred		0.031	T
GERP RS		0.66
Varity_R		0.092
gMVP		0.046

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-56597874;