1-235448755-G-C

Variant summary

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

The NM_003193.5(TBCE):c.1577G>C(p.Arg526Pro) variant causes a missense change. The variant allele was found at a frequency of 0.000000686 in 1,458,616 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. R526Q) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: TBCE NM_003193.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.69

Genes affected

TBCE (HGNC:11582): (tubulin folding cofactor E) Cofactor E 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. Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jul 2008]

B3GALNT2 (HGNC:28596): (beta-1,3-N-acetylgalactosaminyltransferase 2) This gene encodes a member of the glycosyltransferase 31 family. The encoded protein synthesizes GalNAc:beta-1,3GlcNAc, a novel carbohydrate structure, on N- and O-glycans. Alternatively spliced transcript variants that encode different isoforms have been described. [provided by RefSeq, Mar 2013]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TBCE	NM_003193.5	c.1577G>C	p.Arg526Pro	missense_variant	17/17	ENST00000642610.2
B3GALNT2	NM_152490.5	c.*1451C>G		3_prime_UTR_variant	12/12	ENST00000366600.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TBCE	ENST00000642610.2	c.1577G>C	p.Arg526Pro	missense_variant	17/17		NM_003193.5	P1
B3GALNT2	ENST00000366600.8	c.*1451C>G		3_prime_UTR_variant	12/12	1	NM_152490.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000399 AC: 1 AN: 250410 Hom.: 0 AF XY: 0.00000738 AC XY: 1 AN XY: 135492

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: 0.00000886

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.86e-7 AC: 1 AN: 1458616 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 725906

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: 0.00

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.76
BayesDel_addAF	Uncertain	0.078	D
BayesDel_noAF	Benign	-0.13
Cadd	Pathogenic	30
Dann	Uncertain	1.0
Eigen	Uncertain	0.58
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Benign	0.025	T
MetaRNN	Uncertain	0.63	D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Benign	-0.92	T
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.66	T
Polyphen		1.0	.;D;D;D;D;D;D;D;D;.;.;.;.
Vest4		0.87, 0.85
MutPred		0.51		.;Gain of catalytic residue at W527 (P = 0.0055);Gain of catalytic residue at W527 (P = 0.0055);Gain of catalytic residue at W527 (P = 0.0055);Gain of catalytic residue at W527 (P = 0.0055);Gain of catalytic residue at W527 (P = 0.0055);Gain of catalytic residue at W527 (P = 0.0055);Gain of catalytic residue at W527 (P = 0.0055);Gain of catalytic residue at W527 (P = 0.0055);.;.;.;.;
MVP		0.74
MPC		0.98
ClinPred		0.99	D
GERP RS		5.0
Varity_R		0.84
gMVP		0.89

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: rs140662460; hg19: chr1-235612070;