Genetic Variant CEP120:p.Thr134Thr (chr5-123412460-G-A) – ACMG Classification: Benign (-9 pts)

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_ModerateBP6_ModerateBP7BS1

The NM_001375405.1(CEP120):c.402C>T(p.Thr134Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000788 in 1,610,818 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.00016 ( 1 hom., cov: 32)

Exomes 𝑓: 0.000070 ( 0 hom. )

Consequence

CEP120
NM_001375405.1 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: -0.165

Publications

1 publications found

Variant links:

Genes affected

CEP120 (HGNC:26690): (centrosomal protein 120) This gene encodes a protein that functions in the microtubule-dependent coupling of the nucleus and the centrosome. A similar protein in mouse plays a role in both interkinetic nuclear migration, which is a characteristic pattern of nuclear movement in neural progenitors, and in neural progenitor self-renewal. Mutations in this gene are predicted to result in neurogenic defects. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2009]

CEP120 Gene-Disease associations (from GenCC):

ciliopathy
Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
Joubert syndrome 31
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
short-rib thoracic dysplasia 13 with or without polydactyly
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
Jeune syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Joubert syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Joubert syndrome with ocular defect
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CEP120 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.45).

BP6

Variant 5-123412460-G-A is Benign according to our data. Variant chr5-123412460-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 476167.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=-0.165 with no splicing effect.

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.000164 (25/152242) while in subpopulation EAS AF = 0.00212 (11/5184). AF 95% confidence interval is 0.00119. There are 1 homozygotes in GnomAd4. There are 9 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001375405.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
CEP120	NM_001375405.1	MANE Select	c.402C>T	p.Thr134Thr	synonymous	Exon 4 of 20	NP_001362334.1
CEP120	NM_001375408.1		c.-347C>T		5_prime_UTR_premature_start_codon_gain	Exon 5 of 23	NP_001362337.1
CEP120	NM_001375409.1		c.-289C>T		5_prime_UTR_premature_start_codon_gain	Exon 4 of 21	NP_001362338.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
CEP120	ENST00000306467.10	TSL:5 MANE Select	c.402C>T	p.Thr134Thr	synonymous	Exon 4 of 20	ENSP00000303058.6
CEP120	ENST00000508138.5	TSL:1	n.402C>T		non_coding_transcript_exon	Exon 5 of 23	ENSP00000422234.1
CEP120	ENST00000513565.6	TSL:1	n.402C>T		non_coding_transcript_exon	Exon 4 of 21	ENSP00000422089.2

Frequencies

GnomAD3 genomes

AF:

0.000158

AC:

AN:

152124

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000786

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00212

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000203

AC:

AN:

246390

AF XY:

0.000187

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00266

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000338

GnomAD4 exome

AF:

0.0000699

AC:

102

AN:

1458576

Hom.:

Cov.:

AF XY:

0.0000606

AC XY:

AN XY:

725504

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33310

American (AMR)

AF:

0.00

AC:

AN:

44342

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26084

East Asian (EAS)

AF:

0.00157

AC:

AN:

39402

South Asian (SAS)

AF:

0.0000117

AC:

AN:

85564

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53394

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.00000720

AC:

AN:

1110470

Other (OTH)

AF:

0.000515

AC:

AN:

60246

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.455

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:

0.000164

AC:

AN:

152242

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74440

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41538

American (AMR)

AF:

0.000785

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00212

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4814

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10608

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68012

Other (OTH)

AF:

0.000946

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.482

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.000130

Hom.:

Bravo

AF:

0.000132

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Short-rib thoracic dysplasia 13 with or without polydactyly

Benign:1

Jan 20, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.45

CADD

Benign

8.9

(source)

DANN

Benign

0.67

PhyloP100

-0.17

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over