Genetic Variant NM_001371623.1:c.3712G>T (chr5-150393480-G-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001371623.1(TCOF1):c.3712G>T(p.Ala1238Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,892 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 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. A1238T) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

TCOF1
NM_001371623.1 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.0190

Publications

8 publications found

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 Gene-Disease associations (from GenCC):

Treacher Collins syndrome 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
Treacher-Collins syndrome
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen

TCOF1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.035068423).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001371623.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
TCOF1	NM_001371623.1	MANE Select	c.3712G>T	p.Ala1238Ser	missense	Exon 23 of 27	NP_001358552.1
TCOF1	NM_001135243.2		c.3709G>T	p.Ala1237Ser	missense	Exon 23 of 27	NP_001128715.1
TCOF1	NM_001135244.2		c.3598G>T	p.Ala1200Ser	missense	Exon 22 of 26	NP_001128716.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
TCOF1	ENST00000643257.2	MANE Select	c.3712G>T	p.Ala1238Ser	missense	Exon 23 of 27	ENSP00000493815.1
TCOF1	ENST00000504761.6	TSL:1	c.3709G>T	p.Ala1237Ser	missense	Exon 23 of 26	ENSP00000421655.2
TCOF1	ENST00000323668.11	TSL:1	c.3478G>T	p.Ala1160Ser	missense	Exon 22 of 26	ENSP00000325223.6

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251428

AF XY:

0.00000736

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461892

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727246

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1112012

Other (OTH)

AF:

0.00

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.450

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.081

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.50

CADD

Benign

4.3

(source)

DANN

Benign

0.47

DEOGEN2

Benign

0.072

Eigen

Benign

-1.5

Eigen_PC

Benign

-1.5

FATHMM_MKL

Benign

0.14

LIST_S2

Benign

0.64

M_CAP

Benign

0.0067

MetaRNN

Benign

0.035

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.34

PhyloP100

-0.019

PrimateAI

Benign

0.22

PROVEAN

Benign

-1.9

REVEL

Benign

0.052

Sift

Uncertain

0.011

Sift4G

Benign

0.52

Polyphen

0.0070

Vest4

0.024

MutPred

0.14

Gain of phosphorylation at A1237 (P = 0.0092)

MVP

0.37

MPC

0.090

ClinPred

0.022

GERP RS

-3.0

RBP_binding_hub_radar

0.97

RBP_regulation_power_radar

2.1

Varity_R

0.027

gMVP

0.040

Mutation Taster

=97/3

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over