1-109066134-C-T

Variant names:

• chr1-109066134-C-T
• rs2102105455
• NM_005645.4:c.204+1G>A

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_005645.4(TAF13):​c.204+1G>A variant causes a splice donor, intron change. The variant allele was found at a frequency of 0.000000688 in 1,452,682 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: TAF13 NM_005645.4 splice_donor, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.63
• Publications: 0 publications found

Genes affected

TAF13 (HGNC:11546): (TATA-box binding protein associated factor 13) Initiation of transcription by RNA polymerase II requires the activities of more than 70 polypeptides. The protein that coordinates these activities is transcription factor IID (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 a small subunit associated with a subset of TFIID complexes. This subunit interacts with TBP and with two other small subunits of TFIID, TAF10 and TAF11. There is a pseudogene located on chromosome 6. [provided by RefSeq, Jul 2008]

TAF13 Gene-Disease associations (from GenCC):

• intellectual disability, autosomal recessive 60

  Inheritance: AR, Unknown Classification: STRONG, MODERATE, LIMITED Submitted by: G2P, Ambry Genetics, PanelApp Australia, Labcorp Genetics (formerly Invitae)
• autosomal recessive primary microcephaly

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005645.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TAF13	NM_005645.4	MANE Select	c.204+1G>A		splice_donor intron	N/A	NP_005636.1	Q15543

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TAF13	ENST00000338366.6	TSL:1 MANE Select	c.204+1G>A		splice_donor intron	N/A	ENSP00000355051.4	Q15543
	TAF13	ENST00000692048.1		c.204+1G>A		splice_donor intron	N/A	ENSP00000508876.1	A0A8I5KR19
	TAF13	ENST00000461096.7	TSL:5	c.90+1G>A		splice_donor intron	N/A	ENSP00000433883.2	A0A8J9AJQ9

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.88e-7 AC: 1 AN: 1452682 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 722818

African (AFR) AF: 0.00 AC: 0 AN: 32986

American (AMR) AF: 0.00 AC: 0 AN: 41880

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25908

East Asian (EAS) AF: 0.00 AC: 0 AN: 39560

South Asian (SAS) AF: 0.00 AC: 0 AN: 84416

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53354

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5744

European-Non Finnish (NFE) AF: 9.02e-7 AC: 1 AN: 1108754

Other (OTH) AF: 0.00 AC: 0 AN: 60080

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.44	D
BayesDel_noAF	Pathogenic	0.39
CADD	Pathogenic	30
DANN	Uncertain	1.0
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.99
FATHMM_MKL	Pathogenic	0.99	D
PhyloP100		5.6
GERP RS		5.5
Mutation Taster		=21/79	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.94
SpliceAI score (max)		1.0		Details are displayed if max score is > 0.2
DS_DL_spliceai		1.0		Position offset: 1

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

Other links and lift over

dbSNP: rs2102105455; hg19: chr1-109608756;