rs200645401

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_001371623.1(TCOF1):c.4388A>G(p.Lys1463Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000595 in 1,614,066 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000056 ( 0 hom. )

Consequence

TCOF1
NM_001371623.1 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:2

Conservation

PhyloP100: 2.60

Variant links:

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]

TCOF1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.026035726).

BP6

Variant 5-150398396-A-G is Benign according to our data. Variant chr5-150398396-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 477618.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Likely_benign=1, Benign=1}.

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.0000919 (14/152346) while in subpopulation EAS AF= 0.0027 (14/5188). AF 95% confidence interval is 0.00163. There are 0 homozygotes in gnomad4. There are 6 alleles in male gnomad4 subpopulation. This position pass quality control queck.

BS2

High AC in GnomAd at 14 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TCOF1	NM_001371623.1 linkuse as main transcript	c.4388A>G	p.Lys1463Arg	missense_variant	25/27	ENST00000643257.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TCOF1	ENST00000643257.2 linkuse as main transcript	c.4388A>G	p.Lys1463Arg	missense_variant	25/27		NM_001371623.1	P3	Q13428-3

Frequencies

GnomAD3 genomes

AF:

0.0000920

AC:

AN:

152230

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00269

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000129

AC:

AN:

248668

Hom.:

AF XY:

0.0000965

AC XY:

AN XY:

134686

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00164

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000327

GnomAD4 exome

AF:

0.0000561

AC:

AN:

1461720

Hom.:

Cov.:

AF XY:

0.0000605

AC XY:

AN XY:

727176

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00202

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000919

AC:

AN:

152346

Hom.:

Cov.:

AF XY:

0.0000805

AC XY:

AN XY:

74496

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00270

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000907

ExAC

AF:

0.0000988

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Microcephaly

Uncertain:1

Uncertain significance, no assertion criteria provided

research

Department of Pediatrics, Samsung Medical Center, Samsung Medical Center

- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 22, 2023

The c.4385A>G (p.K1462R) alteration is located in exon 25 (coding exon 25) of the TCOF1 gene. This alteration results from a A to G substitution at nucleotide position 4385, causing the lysine (K) at amino acid position 1462 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

May 17, 2021

- -

Treacher Collins syndrome 1

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jun 03, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.087

BayesDel_addAF

Uncertain

0.13

BayesDel_noAF

Uncertain

-0.050

Cadd

Benign

Dann

Uncertain

0.99

Eigen

Uncertain

0.51

Eigen_PC

Uncertain

0.47

FATHMM_MKL

Uncertain

0.81

LIST_S2

Benign

0.38

T;T;T;T;.;T;T;T;.;T;T

M_CAP

Benign

0.047

MetaRNN

Benign

0.026

T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Uncertain

0.14

MutationTaster

Benign

0.98

N;N;N;N;N;N;N

PrimateAI

Benign

0.46

Polyphen

1.0

.;D;D;D;.;.;D;D;D;.;.

Vest4

0.31, 0.35, 0.33, 0.35

MVP

0.79

MPC

0.064

ClinPred

0.12

GERP RS

5.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.19

gMVP

0.00069

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over