5-37206423-G-C

Variant names:

• chr5-37206423-G-C
• rs863225166
• NM_001384732.1:c.2923C>G

Variant summary

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

The NM_001384732.1(CPLANE1):​c.2923C>G​(p.Gln975Glu) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000131 in 152,178 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/19 in silico tools predict a benign outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: 𝑓 0.000013 (0 hom., cov: 32)
• Consequence: CPLANE1 NM_001384732.1 missense, splice_region
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.10

Genes affected

CPLANE1 (HGNC:25801): (ciliogenesis and planar polarity effector complex subunit 1) The protein encoded by this gene has putative coiled-coil domains and may be a transmembrane protein. Defects in this gene are a cause of Joubert syndrome (JBTS). [provided by RefSeq, May 2012]

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=0.06277859).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CPLANE1	NM_001384732.1	c.2923C>G	p.Gln975Glu	missense_variant, splice_region_variant	Exon 17 of 53	ENST00000651892.2	NP_001371661.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CPLANE1	ENST00000651892.2	c.2923C>G	p.Gln975Glu	missense_variant, splice_region_variant	Exon 17 of 53		NM_001384732.1	ENSP00000498265.2

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152178 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000483

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 29

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152178 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74336

Gnomad4 AFR AF: 0.0000483

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: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Feb 24, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamine, which is neutral and polar, with glutamic acid, which is acidic and polar, at codon 975 of the CPLANE1 protein (p.Gln975Glu). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with clinical features of C5orf42-related conditions (Invitae). ClinVar contains an entry for this variant (Variation ID: 578160). 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 tolerated. 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 v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.075
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.51
CADD	Benign	14
DANN	Benign	0.52
DEOGEN2	Benign	0.013	T;T;T
Eigen	Benign	-0.32
Eigen_PC	Benign	-0.27
FATHMM_MKL	Benign	0.27	N
LIST_S2	Benign	0.69	.;T;T
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.063	T;T;T
MetaSVM	Benign	-0.98	T
PROVEAN	Benign	-0.72	N;N;N
REVEL	Benign	0.12
Sift	Benign	0.34	T;T;T
Sift4G	Benign	0.17	T;T;T
Vest4		0.22
MVP		0.27
MPC		0.16
ClinPred		0.28	T
GERP RS		5.4
Varity_R		0.074
gMVP		0.095

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs863225166; hg19: chr5-37206525;