chr5-150357817-T-A

Position:

• chr5-150357817-T-A

Variant summary

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

The NM_001371623.1(TCOF1):​c.71T>A​(p.Val24Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TCOF1 NM_001371623.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.32

Genes affected

TCOF1 (HGNC:11654): (treacle ribosome biogenesis factor 1) This gene encodes a nucleolar protein with a LIS1 homology domain. The protein is involved in ribosomal DNA gene transcription through its interaction with upstream binding factor (UBF). Mutations in this gene have been associated with Treacher Collins syndrome, a disorder which includes abnormal craniofacial development. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2008]

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	Protein	UniProt
TCOF1	NM_001371623.1	c.71T>A	p.Val24Glu	missense_variant	1/27	ENST00000643257.2	NP_001358552.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TCOF1	ENST00000643257.2	c.71T>A	p.Val24Glu	missense_variant	1/27		NM_001371623.1	ENSP00000493815.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jul 25, 2024

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.89
BayesDel_addAF	Pathogenic	0.21	D
BayesDel_noAF	Uncertain	0.070
CADD	Pathogenic	28
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.57	.;D;.;.;.;.;.;.;.;.;.;D;T;T
Eigen	Uncertain	0.30
Eigen_PC	Uncertain	0.31
FATHMM_MKL	Benign	0.67	D
LIST_S2	Benign	0.83	T;T;T;T;.;T;T;T;T;T;T;.;T;T
M_CAP	Uncertain	0.20	D
MetaRNN	Uncertain	0.49	T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Uncertain	0.30	D
MutationAssessor	Benign	0.69	.;N;N;N;N;.;.;N;N;N;N;N;.;.
PrimateAI	Uncertain	0.67	T
PROVEAN	Uncertain	-4.1	.;D;D;D;.;.;.;.;D;D;D;D;D;D
REVEL	Uncertain	0.56
Sift	Uncertain	0.0030	.;D;D;D;.;.;.;.;D;D;D;D;D;.
Sift4G	Uncertain	0.0040	.;D;D;D;.;.;.;.;D;D;D;D;D;D
Polyphen		0.99, 1.0, 1.0	.;D;D;D;.;.;.;.;D;D;D;D;.;.
Vest4		0.79, 0.55, 0.54, 0.56, 0.47, 0.79
MutPred		0.45		Gain of disorder (P = 0.0035);Gain of disorder (P = 0.0035);Gain of disorder (P = 0.0035);Gain of disorder (P = 0.0035);Gain of disorder (P = 0.0035);Gain of disorder (P = 0.0035);Gain of disorder (P = 0.0035);Gain of disorder (P = 0.0035);Gain of disorder (P = 0.0035);Gain of disorder (P = 0.0035);Gain of disorder (P = 0.0035);Gain of disorder (P = 0.0035);Gain of disorder (P = 0.0035);.;
MVP		0.79
MPC		0.52
ClinPred		0.99	D
GERP RS		4.1
RBP_binding_hub_radar		0.92
RBP_regulation_power_radar		2.0
Varity_R		0.72
gMVP		0.71

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr5-149737380;