19-6380485-GCC-CCT

Variant names:

• chr19-6380485-G-C
• NM_002096.3:c.1350C>G
• GTF2F1 p.Gly450Gly

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_002096.3(GTF2F1):​c.1350C>G​(p.Gly450Gly) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. G450G) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: GTF2F1 NM_002096.3 splice_region, synonymous
• Scores: Splicing: ADA: 0.00003826
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -2.56
• Publications: 0 publications found

Genes affected

GTF2F1 (HGNC:4652): (general transcription factor IIF subunit 1) Enables several functions, including RNA polymerase II general transcription initiation factor activity; phosphatase activator activity; and promoter-specific chromatin binding activity. Involved in several processes, including positive regulation of transcription by RNA polymerase II; response to virus; and transcription initiation from RNA polymerase II promoter. Located in cell junction and nucleoplasm. Part of transcription factor TFIID complex. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).
• BP7: Synonymous conserved (PhyloP=-2.56 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002096.3. 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
	GTF2F1	NM_002096.3	MANE Select	c.1350C>G	p.Gly450Gly	splice_region synonymous	Exon 13 of 13	NP_002087.2	P35269

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GTF2F1	ENST00000394456.10	TSL:1 MANE Select	c.1350C>G	p.Gly450Gly	splice_region synonymous	Exon 13 of 13	ENSP00000377969.3	P35269
	GTF2F1	ENST00000869875.1		c.1347C>G	p.Gly449Gly	splice_region synonymous	Exon 13 of 13	ENSP00000539934.1
	GTF2F1	ENST00000933129.1		c.1344C>G	p.Gly448Gly	splice_region synonymous	Exon 13 of 13	ENSP00000603188.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	0.0020
DANN	Benign	0.70
PhyloP100		-2.6

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000038
dbscSNV1_RF	Benign	0.098
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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr19-6380496;