NM_001384732.1:c.3828T>C

Variant names:

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_StrongBP6BP7BS1BS2

The NM_001384732.1(CPLANE1):c.3828T>C(p.Leu1276Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000922 in 1,613,030 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00082 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00093 ( 3 hom. )

Consequence

CPLANE1
NM_001384732.1 synonymous

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:2B:6

Conservation

PhyloP100: -0.950

Publications

2 publications found

Variant links:

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]

CPLANE1 Gene-Disease associations (from GenCC):

Joubert syndrome 17
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Laboratory for Molecular Medicine, ClinGen, G2P, Illumina, Labcorp Genetics (formerly Invitae)
orofaciodigital syndrome type 6
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, G2P
Joubert syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CPLANE1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -14 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.67).

BP6

Variant 5-37187826-A-G is Benign according to our data. Variant chr5-37187826-A-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 195696.

BP7

Synonymous conserved (PhyloP=-0.95 with no splicing effect.

BS1

Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.000821 (125/152340) while in subpopulation AMR AF = 0.00235 (36/15308). AF 95% confidence interval is 0.00175. There are 0 homozygotes in GnomAd4. There are 72 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CPLANE1	NM_001384732.1 link	c.3828T>C	p.Leu1276Leu	synonymous_variant	Exon 22 of 53	ENST00000651892.2	NP_001371661.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CPLANE1	ENST00000651892.2 link	c.3828T>C	p.Leu1276Leu	synonymous_variant	Exon 22 of 53		NM_001384732.1	ENSP00000498265.2

Frequencies

GnomAD3 genomes

AF:

0.000821

AC:

125

AN:

152222

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000217

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00235

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:

0.00110

Gnomad OTH

AF:

0.00239

GnomAD2 exomes

AF:

0.000655

AC:

164

AN:

250548

AF XY:

0.000605

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.00207

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.000741

Gnomad OTH exome

AF:

0.000817

GnomAD4 exome

AF:

0.000933

AC:

1363

AN:

1460690

Hom.:

Cov.:

AF XY:

0.000867

AC XY:

630

AN XY:

726630

show subpopulations

African (AFR)

AF:

0.000419

AC:

AN:

33444

American (AMR)

AF:

0.00186

AC:

AN:

44624

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26102

East Asian (EAS)

AF:

0.00

AC:

AN:

39636

South Asian (SAS)

AF:

0.0000465

AC:

AN:

86056

European-Finnish (FIN)

AF:

0.0000187

AC:

AN:

53386

Middle Eastern (MID)

AF:

0.000174

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00109

AC:

1211

AN:

1111326

Other (OTH)

AF:

0.000812

AC:

AN:

60354

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.457

Heterozygous variant carriers

112

168

224

280

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

150

200

250

<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:

0.000821

AC:

125

AN:

152340

Hom.:

Cov.:

AF XY:

0.000966

AC XY:

AN XY:

74500

show subpopulations

African (AFR)

AF:

0.000216

AC:

AN:

41580

American (AMR)

AF:

0.00235

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00110

AC:

AN:

68026

Other (OTH)

AF:

0.00237

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

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:

0.000870

Hom.:

Bravo

AF:

0.000941

EpiCase

AF:

0.000328

EpiControl

AF:

0.000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:2Benign:6

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:3

Dec 17, 2014

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Sep 30, 2020

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is associated with the following publications: (PMID: 26092869) -

Jan 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

CPLANE1: BP4, BP7 -

Joubert syndrome 17

Pathogenic:1Uncertain:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Feb 23, 2015

UW Hindbrain Malformation Research Program, University of Washington

Significance:Likely pathogenic

Review Status:flagged submission

Collection Method:research

- -

not specified

Benign:2

Dec 08, 2023

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: CPLANE1 c.3828T>C alters a non-conserved nucleotide resulting in a synonymous change. Consensus agreement among computation tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.00092 in 1613030 control chromosomes, predominantly at a frequency of 0.002 within the Latino subpopulation in the gnomAD database, including 1 homozygotes. The observed variant frequency within Latino control individuals in the gnomAD database is approximately 1.35 fold of the estimated maximal expected allele frequency for a pathogenic variant in CPLANE1 causing Joubert Syndrome And Related Disorders phenotype (0.0015), strongly suggesting that the variant is a benign polymorphism found primarily in populations of Latino origin. c.3828T>C has been reported in the literature in individuals affected with Joubert Syndrome And Related Disorders (Bachman_2015). This report does not provide unequivocal conclusions about association of the variant with Joubert Syndrome And Related Disorders. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication have been ascertained in the context of this evaluation (PMID: 26092869). Five submitters have cited clinical-significance assessments for this variant to ClinVar after 2014 and classified as benign/likely benign (n=3), likely pathogenic (n=1) and pathogenic (n=1). Multiple submitters reported the variant with conflicting assessments. Based on the evidence outlined above, the variant was classified as benign. -

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Benign:1

Mar 02, 2022

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.67

CADD

Benign

5.3

(source)

DANN

Benign

0.72

PhyloP100

-0.95

Mutation Taster

=100/0

disease causing (ClinVar)

(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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over