17-82926488-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005993.5(TBCD):c.2468C>G(p.Ala823Gly) variant causes a missense change. The variant allele was found at a frequency of 0.00000547 in 1,461,302 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict 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. A823E) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: TBCD NM_005993.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.63

Genes affected

TBCD (HGNC:11581): (tubulin folding cofactor D) Cofactor D is one of four proteins (cofactors A, D, E, and C) involved in the pathway leading to correctly folded beta-tubulin from folding intermediates. Cofactors A and D are believed to play a role in capturing and stabilizing beta-tubulin intermediates in a quasi-native confirmation. Cofactor E binds to the cofactor D/beta-tubulin complex; interaction with cofactor C then causes the release of beta-tubulin polypeptides that are committed to the native state. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2412785).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TBCD	NM_005993.5	c.2468C>G	p.Ala823Gly	missense_variant	28/39	ENST00000355528.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TBCD	ENST00000355528.9	c.2468C>G	p.Ala823Gly	missense_variant	28/39	1	NM_005993.5	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.0000161 AC: 4 AN: 248748 Hom.: 0 AF XY: 0.0000222 AC XY: 3 AN XY: 134956

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 SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000355

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461302 Hom.: 0 Cov.: 31 AF XY: 0.00000825 AC XY: 6 AN XY: 726906

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000630

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000756

ExAC AF: 0.0000331 AC: 4

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.44
Cadd	Benign	19
Dann	Uncertain	1.0
DEOGEN2	Benign	0.21	T;.
Eigen	Benign	-0.24
Eigen_PC	Benign	-0.37
FATHMM_MKL	Benign	0.47	N
LIST_S2	Uncertain	0.88	D;D
M_CAP	Benign	0.040	D
MetaRNN	Benign	0.24	T;T
MetaSVM	Benign	-0.81	T
MutationAssessor	Uncertain	2.4	M;.
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.35	T
PROVEAN	Uncertain	-2.6	D;.
REVEL	Benign	0.18
Sift	Uncertain	0.027	D;.
Sift4G	Uncertain	0.034	D;D
Polyphen		0.88	P;.
Vest4		0.22
MVP		0.62
MPC		0.32
ClinPred		0.61	D
GERP RS		3.2
Varity_R		0.14
gMVP		0.26

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs749860401; hg19: chr17-80884364;