14-105211202-T-G

Variant names:

• chr14-105211202-T-G
• rs768902283
• NM_001519.4:c.1916A>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001519.4(BRF1):​c.1916A>C​(p.Asp639Ala) variant causes a missense 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. 14/21 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. D639G) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: BRF1 NM_001519.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.11
• Publications: 0 publications found

Genes affected

BRF1 (HGNC:11551): (BRF1 RNA polymerase III transcription initiation factor subunit) This gene encodes one of the three subunits of the RNA polymerase III transcription factor complex. This complex plays a central role in transcription initiation by RNA polymerase III on genes encoding tRNA, 5S rRNA, and other small structural RNAs. The gene product belongs to the TF2B family. Several alternatively spliced variants encoding different isoforms, that function at different promoters transcribed by RNA polymerase III, have been identified. [provided by RefSeq, Jun 2011]

BRF1 Gene-Disease associations (from GenCC):

• cerebellar-facial-dental syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, G2P, Orphanet, Labcorp Genetics (formerly Invitae)
• colorectal adenoma

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.11896059).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001519.4. 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
	BRF1	NM_001519.4	MANE Select	c.1916A>C	p.Asp639Ala	missense	Exon 17 of 18	NP_001510.2
	BRF1	NM_001440449.1		c.1913A>C	p.Asp638Ala	missense	Exon 17 of 18	NP_001427378.1
	BRF1	NM_001242788.2		c.1835A>C	p.Asp612Ala	missense	Exon 16 of 17	NP_001229717.1	Q92994-5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BRF1	ENST00000547530.7	TSL:1 MANE Select	c.1916A>C	p.Asp639Ala	missense	Exon 17 of 18	ENSP00000448387.2	Q92994-1
	BRF1	ENST00000379937.6	TSL:1	c.1835A>C	p.Asp612Ala	missense	Exon 16 of 17	ENSP00000369269.2	Q92994-5
	BRF1	ENST00000392557.8	TSL:1	c.1304A>C	p.Asp435Ala	missense	Exon 13 of 14	ENSP00000376340.4	Q92994-3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.079
BayesDel_addAF	Benign	-0.083	T
BayesDel_noAF	Benign	-0.36
CADD	Benign	13
DANN	Benign	0.73
DEOGEN2	Benign	0.23	T
Eigen	Benign	-0.58
Eigen_PC	Benign	-0.57
FATHMM_MKL	Benign	0.29	N
LIST_S2	Benign	0.72	T
M_CAP	Benign	0.028	D
MetaRNN	Benign	0.12	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.2	L
PhyloP100		1.1
PrimateAI	Uncertain	0.59	T
PROVEAN	Uncertain	-3.2	D
REVEL	Benign	0.039
Sift	Benign	0.17	T
Sift4G	Uncertain	0.018	D
Polyphen		0.38	B
Vest4		0.18
MutPred		0.28		Gain of catalytic residue at Y636 (P = 0.0028)
MVP		0.14
ClinPred		0.11	T
GERP RS		4.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.14
gMVP		0.26
Mutation Taster		=79/21	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: rs768902283; hg19: chr14-105677539;