17-82921536-C-G

Position:

• chr17-82921536-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.2137C>G​(p.His713Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: TBCD NM_005993.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: 2.46

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=0.25643235).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TBCD	NM_005993.5	c.2137C>G	p.His713Asp	missense_variant	25/39	ENST00000355528.9	NP_005984.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TBCD	ENST00000355528.9	c.2137C>G	p.His713Asp	missense_variant	25/39	1	NM_005993.5	ENSP00000347719	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

Thiel-Behnke corneal dystrophy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genomic Research Center, Shahid Beheshti University of Medical Sciences

Aug 07, 2018

- -

Early-onset progressive diffuse brain atrophy-microcephaly-muscle weakness-optic atrophy syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genomic Research Center, Shahid Beheshti University of Medical Sciences

Aug 07, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.022	T
BayesDel_noAF	Benign	-0.27
CADD	Benign	11
DANN	Benign	0.58
DEOGEN2	Benign	0.032	T;.;.;.;.;.;T
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.071	N
LIST_S2	Benign	0.84	T;T;T;T;T;T;T
M_CAP	Benign	0.069	D
MetaRNN	Benign	0.26	T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.34	N;.;.;.;.;.;.
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.30	T
PROVEAN	Benign	-0.42	N;.;.;.;.;.;.
REVEL	Uncertain	0.34
Sift	Benign	0.22	T;.;.;.;.;.;.
Sift4G	Benign	0.23	T;T;T;T;T;T;T
Polyphen		0.0070	B;.;.;.;.;.;.
Vest4		0.43
MutPred		0.72		Gain of relative solvent accessibility (P = 0.09);Gain of relative solvent accessibility (P = 0.09);.;.;.;.;.;
MVP		0.33
MPC		0.40
ClinPred		0.064	T
GERP RS		2.7
Varity_R		0.031
gMVP		0.41

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

LitVar

Other links and lift over

dbSNP: rs200903034; hg19: chr17-80879412;