1-169380608-A-C

Variant names:

• chr1-169380608-A-C
• rs1654493712
• NM_001320973.2:c.796A>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001320973.2(BLZF1):​c.796A>C​(p.Lys266Gln) variant causes a missense, splice region change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. 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. K266E) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: BLZF1 NM_001320973.2 missense, splice_region
• Scores: Splicing: ADA: 0.9999
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.42
• Publications: 0 publications found

Genes affected

BLZF1 (HGNC:1065): (basic leucine zipper nuclear factor 1) Enables ubiquitin protein ligase binding activity. Acts upstream of or within Golgi organization and Golgi to plasma membrane protein transport. Located in Golgi apparatus and nucleoplasm. Biomarker of hepatocellular carcinoma. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001320973.2. 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
	BLZF1	NM_001320973.2	MANE Select	c.796A>C	p.Lys266Gln	missense splice_region	Exon 5 of 7	NP_001307902.1	Q9H2G9-1
	BLZF1	NM_003666.4		c.796A>C	p.Lys266Gln	missense splice_region	Exon 5 of 8	NP_003657.1	Q9H2G9-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BLZF1	ENST00000367808.8	TSL:1 MANE Select	c.796A>C	p.Lys266Gln	missense splice_region	Exon 5 of 7	ENSP00000356782.3	Q9H2G9-1
	BLZF1	ENST00000329281.6	TSL:1	c.796A>C	p.Lys266Gln	missense splice_region	Exon 5 of 8	ENSP00000327541.2	Q9H2G9-1
	BLZF1	ENST00000899417.1		c.796A>C	p.Lys266Gln	missense	Exon 5 of 7	ENSP00000569476.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.098
BayesDel_addAF	Benign	-0.097	T
BayesDel_noAF	Benign	-0.38
CADD	Pathogenic	30
DANN	Uncertain	0.99
DEOGEN2	Benign	0.035	T
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.50
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.89	D
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.39	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.3	M
PhyloP100		5.4
PrimateAI	Benign	0.39	T
PROVEAN	Benign	-1.9	N
REVEL	Benign	0.087
Sift	Uncertain	0.014	D
Sift4G	Uncertain	0.055	T
Polyphen		0.92	P
Vest4		0.47
MutPred		0.30		Loss of ubiquitination at K266 (P = 0.0218)
MVP		0.40
MPC		0.16
ClinPred		0.85	D
GERP RS		5.5
Varity_R		0.27
gMVP		0.20
Mutation Taster		=53/47	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.99
SpliceAI score (max)		0.19		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: rs1654493712; hg19: chr1-169349846;