X-71366357-A-G

Variant names:

• chrX-71366357-A-G
• rs748191235
• NM_004606.5:c.-18A>G

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM2 BP4_Strong BP6_Moderate

The NM_004606.5(TAF1):​c.-18A>G variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000364 in 1,097,854 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: not found (cov: 20)
  • Exomes 𝑓: 0.0000036 (0 hom. 0 hem.)
• Consequence: TAF1 NM_004606.5 5_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.431
• Publications: 0 publications found

Genes affected

TAF1 (HGNC:11535): (TATA-box binding protein associated factor 1) Initiation of transcription by RNA polymerase II requires the activities of more than 70 polypeptides. The protein that coordinates these activities is the basal transcription factor TFIID, which binds to the core promoter to position the polymerase properly, serves as the scaffold for assembly of the remainder of the transcription complex, and acts as a channel for regulatory signals. TFIID is composed of the TATA-binding protein (TBP) and a group of evolutionarily conserved proteins known as TBP-associated factors or TAFs. TAFs may participate in basal transcription, serve as coactivators, function in promoter recognition or modify general transcription factors (GTFs) to facilitate complex assembly and transcription initiation. This gene encodes the largest subunit of TFIID. This subunit binds to core promoter sequences encompassing the transcription start site. It also binds to activators and other transcriptional regulators, and these interactions affect the rate of transcription initiation. This subunit contains two independent protein kinase domains at the N- and C-terminals, but also possesses acetyltransferase activity and can act as a ubiquitin-activating/conjugating enzyme. Mutations in this gene result in Dystonia 3, torsion, X-linked, a dystonia-parkinsonism disorder. Alternative splicing of this gene results in multiple transcript variants. This gene is part of a complex transcription unit (TAF1/DYT3), wherein some transcript variants share exons with TAF1 as well as additional downstream DYT3 exons. [provided by RefSeq, Oct 2013]

TAF1 Gene-Disease associations (from GenCC):

• intellectual disability, X-linked, syndromic 33

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P, Illumina
• X-linked dystonia-parkinsonism

  Inheritance: XL, Unknown Classification: STRONG, MODERATE, SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Genomics England PanelApp, Orphanet, Labcorp Genetics (formerly Invitae)
• X-linked intellectual disability-global development delay-facial dysmorphism-sacral caudal remnant syndrome

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.05264178).
• BP6: Variant X-71366357-A-G is Benign according to our data. Variant chrX-71366357-A-G is described in ClinVar as [Benign]. Clinvar id is 2913178.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TAF1	NM_004606.5	c.-18A>G		5_prime_UTR_variant	Exon 1 of 38	ENST00000423759.6	NP_004597.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TAF1	ENST00000423759.6	c.-18A>G		5_prime_UTR_variant	Exon 1 of 38	5	NM_004606.5	ENSP00000406549.2

Frequencies

GnomAD3 genomes Cov.: 20

GnomAD2 exomes AF: 0.0000218 AC: 4 AN: 183234 AF XY: 0.0000147

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000729

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000144

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000364 AC: 4 AN: 1097854 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 363330

African (AFR) AF: 0.00 AC: 0 AN: 26387

American (AMR) AF: 0.0000568 AC: 2 AN: 35206

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19386

East Asian (EAS) AF: 0.0000331 AC: 1 AN: 30204

South Asian (SAS) AF: 0.0000185 AC: 1 AN: 54121

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40531

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3893

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 842067

Other (OTH) AF: 0.00 AC: 0 AN: 46059

GnomAD4 genome Cov.: 20

Alfa AF: 0.00 Hom.: 0

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Oct 03, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.064
BayesDel_addAF	Benign	-0.79	T
BayesDel_noAF	Benign	-1.1
CADD	Benign	1.1
DANN	Benign	0.52
DEOGEN2	Benign	0.066	.;T;.
FATHMM_MKL	Benign	0.020	N
LIST_S2	Benign	0.35	T;T;T
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.053	T;T;T
MetaSVM	Benign	-0.95	T
MutationAssessor	Benign	0.0	N;N;N
PhyloP100		-0.43
PrimateAI	Uncertain	0.54	T
PROVEAN	Benign	0.040	N;N;N
REVEL	Benign	0.0020
Sift	Benign	1.0	T;T;T
Sift4G	Benign	0.94	T;T;T
Polyphen		0.0010, 0.0020	.;B;B
Vest4		0.11
MutPred		0.24		Gain of catalytic residue at I15 (P = 0.059);Gain of catalytic residue at I15 (P = 0.059);Gain of catalytic residue at I15 (P = 0.059);
MVP		0.10
MPC		0.62
ClinPred		0.010	T
GERP RS		-0.33
PromoterAI		0.15	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.028
gMVP		0.098
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs748191235; hg19: chrX-70586207;