chr4-56020780-G-A

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 4P and 1B. PP3_StrongBP6

The NM_025009.5(CEP135):c.3320G>A(p.Arg1107Gln) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000149 in 1,607,034 control chromosomes in the GnomAD database, with no homozygous occurrence. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

CEP135
NM_025009.5 missense, splice_region

Scores

Splicing: ADA: 1.000

Clinical Significance

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

Conservation

PhyloP100: 7.88

Publications

2 publications found

Variant links:

Genes affected

CEP135 (HGNC:29086): (centrosomal protein 135) This gene encodes a centrosomal protein, which acts as a scaffolding protein during early centriole biogenesis, and is also required for centriole-centriole cohesion during interphase. Mutations in this gene are associated with autosomal recessive primary microcephaly-8. [provided by RefSeq, Jun 2012]

CEP135 Gene-Disease associations (from GenCC):

microcephaly 8, primary, autosomal recessive
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
autosomal recessive primary microcephaly
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CEP135 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PP3

Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

BP6

Variant 4-56020780-G-A is Benign according to our data. Variant chr4-56020780-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 210682.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CEP135	NM_025009.5 link	c.3320G>A	p.Arg1107Gln	missense_variant, splice_region_variant	Exon 24 of 26	ENST00000257287.5	NP_079285.2	Q66GS9-1
CEP135	XM_006714055.4 link	c.3287G>A	p.Arg1096Gln	missense_variant, splice_region_variant	Exon 24 of 26		XP_006714118.1
CEP135	XM_005265788.5 link	c.2249G>A	p.Arg750Gln	missense_variant, splice_region_variant	Exon 17 of 19		XP_005265845.1
CEP135	XM_011534412.2 link	c.1790G>A	p.Arg597Gln	missense_variant, splice_region_variant	Exon 14 of 16		XP_011532714.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CEP135	ENST00000257287.5 link	c.3320G>A	p.Arg1107Gln	missense_variant, splice_region_variant	Exon 24 of 26	1	NM_025009.5	ENSP00000257287.3	Q66GS9-1
CEP135	ENST00000506202.1 link	n.3270G>A		splice_region_variant, non_coding_transcript_exon_variant	Exon 17 of 19	1
CEP135	ENST00000706801.1 link	n.1385G>A		splice_region_variant, non_coding_transcript_exon_variant	Exon 8 of 10

Frequencies

GnomAD3 genomes

AF:

0.0000789

AC:

AN:

152014

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000266

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000656

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

GnomAD2 exomes

AF:

0.00000808

AC:

AN:

247592

AF XY:

0.00000748

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000825

AC:

AN:

1455020

Hom.:

Cov.:

AF XY:

0.00000829

AC XY:

AN XY:

723676

show subpopulations

African (AFR)

AF:

0.0000300

AC:

AN:

33280

American (AMR)

AF:

0.0000227

AC:

AN:

44032

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25964

East Asian (EAS)

AF:

0.00

AC:

AN:

39530

South Asian (SAS)

AF:

0.0000354

AC:

AN:

84640

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53262

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5736

European-Non Finnish (NFE)

AF:

0.00000632

AC:

AN:

1108468

Other (OTH)

AF:

0.00

AC:

AN:

60108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.508

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.0000789

AC:

AN:

152014

Hom.:

Cov.:

AF XY:

0.0000943

AC XY:

AN XY:

74224

show subpopulations

African (AFR)

AF:

0.000266

AC:

AN:

41398

American (AMR)

AF:

0.0000656

AC:

AN:

15250

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10564

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68006

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

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:

0.0000875

Hom.:

Bravo

AF:

0.0000642

ExAC

AF:

0.00000824

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 04, 2015

Genetic Services Laboratory, University of Chicago

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Uncertain:1

Apr 19, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 1107 of the CEP135 protein (p.Arg1107Gln). This variant also falls at the last nucleotide of exon 24, which is part of the consensus splice site for this exon. This variant is present in population databases (rs745603844, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with CEP135-related conditions. ClinVar contains an entry for this variant (Variation ID: 210682). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). 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. -

See cases

Benign:1

Dec 25, 2019

Laboratorio de Genetica e Diagnostico Molecular, Hospital Israelita Albert Einstein

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

ACMG classification criteria: PM2, BP1, BP4 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.37

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.27

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.083

Eigen

Pathogenic

0.76

Eigen_PC

Pathogenic

0.70

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.96

M_CAP

Benign

0.041

MetaRNN

Uncertain

0.74

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.7

PhyloP100

7.9

PrimateAI

Uncertain

0.50

PROVEAN

Uncertain

-2.6

REVEL

Benign

0.25

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.70

MVP

0.52

MPC

0.33

ClinPred

0.81

GERP RS

5.7

Varity_R

0.63

gMVP

0.56

Mutation Taster

=58/42

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

1.0

SpliceAI score (max)

0.010

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