10-133279828-G-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_006659.4(TUBGCP2):c.2647C>A(p.Gln883Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000358 in 1,593,702 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000037 ( 0 hom. )

Consequence

TUBGCP2
NM_006659.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.721

Publications

1 publications found

Variant links:

Genes affected

TUBGCP2 (HGNC:18599): (tubulin gamma complex component 2) Predicted to enable gamma-tubulin binding activity. Predicted to contribute to microtubule minus-end binding activity. Involved in brain development and neuron migration. Located in centrosome and nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

TUBGCP2 Gene-Disease associations (from GenCC):

Norman-Roberts syndrome
Inheritance: AR Classification: STRONG Submitted by: PanelApp Australia
pachygyria, microcephaly, developmental delay, and dysmorphic facies, with or without seizures
Inheritance: AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics

TUBGCP2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.035300642).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TUBGCP2	NM_006659.4 link	c.2647C>A	p.Gln883Lys	missense_variant	Exon 18 of 18	ENST00000252936.8	NP_006650.1	Q9BSJ2-1Q53EQ3
TUBGCP2	NM_001256617.2 link	c.2731C>A	p.Gln911Lys	missense_variant	Exon 19 of 19		NP_001243546.1	Q9BSJ2-4
TUBGCP2	NM_001256618.2 link	c.2257C>A	p.Gln753Lys	missense_variant	Exon 17 of 17		NP_001243547.1	Q9BSJ2-3
TUBGCP2	NR_046330.2 link	n.3367C>A		non_coding_transcript_exon_variant	Exon 18 of 18

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TUBGCP2	ENST00000252936.8 link	c.2647C>A	p.Gln883Lys	missense_variant	Exon 18 of 18	2	NM_006659.4	ENSP00000252936.3		Q9BSJ2-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152248

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000186

AC:

AN:

214818

AF XY:

0.0000171

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000642

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000211

Gnomad OTH exome

AF:

0.000185

GnomAD4 exome

AF:

0.0000368

AC:

AN:

1441336

Hom.:

Cov.:

AF XY:

0.0000363

AC XY:

AN XY:

715714

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32820

American (AMR)

AF:

0.00

AC:

AN:

41354

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25750

East Asian (EAS)

AF:

0.0000260

AC:

AN:

38448

South Asian (SAS)

AF:

0.00

AC:

AN:

83454

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51040

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5728

European-Non Finnish (NFE)

AF:

0.0000471

AC:

AN:

1103162

Other (OTH)

AF:

0.00

AC:

AN:

59580

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

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152366

Hom.:

Cov.:

AF XY:

0.0000268

AC XY:

AN XY:

74512

show subpopulations

African (AFR)

AF:

0.0000240

AC:

AN:

41592

American (AMR)

AF:

0.00

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000193

AC:

AN:

5178

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68038

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000166

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 22, 2022

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.2647C>A (p.Q883K) alteration is located in exon 18 (coding exon 17) of the TUBGCP2 gene. This alteration results from a C to A substitution at nucleotide position 2647, causing the glutamine (Q) at amino acid position 883 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.081

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.61

CADD

Benign

(source)

DANN

Benign

0.90

DEOGEN2

Benign

0.082

T;.;.;T;T

Eigen

Benign

-0.59

Eigen_PC

Benign

-0.48

FATHMM_MKL

Benign

0.69

LIST_S2

Benign

0.71

.;T;T;T;T

M_CAP

Benign

0.0098

MetaRNN

Benign

0.035

T;T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.5

L;.;.;L;.

PhyloP100

0.72

PrimateAI

Benign

0.36

PROVEAN

Benign

-0.60

N;N;N;N;N

REVEL

Benign

0.099

Sift

Benign

0.38

T;T;T;T;T

Sift4G

Benign

0.68

T;T;T;T;T

Polyphen

0.016

B;.;.;B;.

Vest4

0.048

MutPred

0.19

Gain of methylation at Q883 (P = 0.0114);.;.;Gain of methylation at Q883 (P = 0.0114);.;

MVP

0.27

MPC

0.41

ClinPred

0.081

GERP RS

5.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.13

gMVP

0.25

Mutation Taster

=94/6

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

10-133279828-G-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over