22-50226795-G-A

Variant names:

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 0P and 7B. BP4BP6BP7BS1

The NM_020461.4(TUBGCP6):c.1539C>T(p.Cys513Cys) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000108 in 1,591,546 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00049 ( 1 hom., cov: 32)

Exomes 𝑓: 0.000068 ( 0 hom. )

Consequence

TUBGCP6
NM_020461.4 synonymous

Scores

Clinical Significance

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

Conservation

PhyloP100: 2.87

Publications

2 publications found

Variant links:

Genes affected

TUBGCP6 (HGNC:18127): (tubulin gamma complex component 6) The protein encoded by this gene is part of a large multisubunit complex required for microtubule nucleation at the centrosome. [provided by RefSeq, Jul 2008]

TUBGCP6 Gene-Disease associations (from GenCC):

microcephaly and chorioretinopathy 1
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, G2P, ClinGen

TUBGCP6 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -7 ACMG points.

BP4

Computational evidence support a benign effect (REVEL=0.216).

BP6

Variant 22-50226795-G-A is Benign according to our data. Variant chr22-50226795-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 437158.

BP7

Synonymous conserved (PhyloP=2.87 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000486 (74/152320) while in subpopulation AFR AF = 0.00176 (73/41564). AF 95% confidence interval is 0.00143. There are 1 homozygotes in GnomAd4. There are 34 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_020461.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TUBGCP6	NM_020461.4	MANE Select	c.1539C>T	p.Cys513Cys	synonymous	Exon 7 of 25	NP_065194.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
TUBGCP6	ENST00000248846.10	TSL:1 MANE Select	c.1539C>T	p.Cys513Cys	synonymous	Exon 7 of 25	ENSP00000248846.5
TUBGCP6	ENST00000439308.7	TSL:1	n.1539C>T		non_coding_transcript_exon	Exon 7 of 25	ENSP00000397387.2
TUBGCP6	ENST00000498611.5	TSL:1	n.2072C>T		non_coding_transcript_exon	Exon 7 of 23

Frequencies

GnomAD3 genomes

AF:

0.000486

AC:

AN:

152202

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00176

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:

0.000478

GnomAD2 exomes

AF:

0.000142

AC:

AN:

212010

AF XY:

0.0000969

show subpopulations

Gnomad AFR exome

AF:

0.00209

Gnomad AMR exome

AF:

0.0000345

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:

0.0000681

AC:

AN:

1439226

Hom.:

Cov.:

AF XY:

0.0000561

AC XY:

AN XY:

713566

show subpopulations

African (AFR)

AF:

0.00225

AC:

AN:

33370

American (AMR)

AF:

0.0000250

AC:

AN:

40042

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25470

East Asian (EAS)

AF:

0.00

AC:

AN:

38968

South Asian (SAS)

AF:

0.0000242

AC:

AN:

82480

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51680

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5728

European-Non Finnish (NFE)

AF:

9.08e-7

AC:

AN:

1101810

Other (OTH)

AF:

0.000318

AC:

AN:

59678

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.464

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:

0.000486

AC:

AN:

152320

Hom.:

Cov.:

AF XY:

0.000457

AC XY:

AN XY:

74478

show subpopulations

African (AFR)

AF:

0.00176

AC:

AN:

41564

American (AMR)

AF:

0.00

AC:

AN:

15312

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:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10632

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68002

Other (OTH)

AF:

0.000473

AC:

AN:

2112

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

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:

0.000356

Hom.:

Bravo

AF:

0.000484

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jun 14, 2016

Genetic Services Laboratory, University of Chicago

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

TUBGCP6-related disorder

Benign:1

Oct 28, 2019

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications).

not provided

Benign:1

Feb 03, 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

-0.38

CADD

Benign

9.3

(source)

DANN

Benign

0.67

PhyloP100

2.9

Mutation Taster

=92/8

polymorphism

(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

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