Genetic Variant NM_006659.4:c.2515C>G (chr10-133281331-G-C) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_006659.4(TUBGCP2):c.2515C>G(p.Arg839Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,202 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R839W) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

TUBGCP2
NM_006659.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.08

Publications

0 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:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.40259185).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TUBGCP2	NM_006659.4 link	c.2515C>G	p.Arg839Gly	missense_variant	Exon 17 of 18	ENST00000252936.8	NP_006650.1	Q9BSJ2-1Q53EQ3
TUBGCP2	NM_001256617.2 link	c.2599C>G	p.Arg867Gly	missense_variant	Exon 18 of 19		NP_001243546.1	Q9BSJ2-4
TUBGCP2	NM_001256618.2 link	c.2125C>G	p.Arg709Gly	missense_variant	Exon 16 of 17		NP_001243547.1	Q9BSJ2-3
TUBGCP2	NR_046330.2 link	n.3235C>G		non_coding_transcript_exon_variant	Exon 17 of 18

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TUBGCP2	ENST00000252936.8 link	c.2515C>G	p.Arg839Gly	missense_variant	Exon 17 of 18	2	NM_006659.4	ENSP00000252936.3		Q9BSJ2-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461202

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726926

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33472

American (AMR)

AF:

0.00

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86224

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53168

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5448

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111978

Other (OTH)

AF:

0.00

AC:

AN:

60362

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Benign

-0.089

BayesDel_noAF

Benign

-0.36

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.38

T;.;.;T;T

Eigen

Benign

-0.11

Eigen_PC

Benign

-0.059

FATHMM_MKL

Uncertain

0.91

LIST_S2

Uncertain

0.94

.;D;D;D;D

M_CAP

Benign

0.015

MetaRNN

Benign

0.40

T;T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.1

M;.;.;M;.

PhyloP100

3.1

PrimateAI

Benign

0.43

PROVEAN

Uncertain

-3.7

D;D;D;D;D

REVEL

Benign

0.091

Sift

Uncertain

0.012

D;D;D;D;D

Sift4G

Uncertain

0.020

D;D;D;D;D

Polyphen

0.35

B;.;.;B;.

Vest4

0.46

MutPred

0.52

Loss of stability (P = 0.0263);.;.;Loss of stability (P = 0.0263);.;

MVP

0.43

MPC

0.71

ClinPred

0.94

GERP RS

2.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.29

gMVP

0.53

Mutation Taster

=67/33

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

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over