chr1-228097609-A-G

Position:

• chr1-228097609-A-G

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM2 PP2 PP3_Strong PP5

The NM_001658.4(ARF1):​c.278A>G​(p.Asp93Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: ARF1 NM_001658.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1 U:1
• Conservation: PhyloP100: 9.25

Genes affected

ARF1 (HGNC:652): (ADP ribosylation factor 1) ADP-ribosylation factor 1 (ARF1) is a member of the human ARF gene family. The family members encode small guanine nucleotide-binding proteins that stimulate the ADP-ribosyltransferase activity of cholera toxin and play a role in vesicular trafficking as activators of phospholipase D. The gene products, including 6 ARF proteins and 11 ARF-like proteins, constitute a family of the RAS superfamily. The ARF proteins are categorized as class I (ARF1, ARF2 and ARF3), class II (ARF4 and ARF5) and class III (ARF6), and members of each class share a common gene organization. The ARF1 protein is localized to the Golgi apparatus and has a central role in intra-Golgi transport. Multiple alternatively spliced transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ARF1. . Trascript score misZ 4.1509 (greater than threshold 3.09). GenCC has associacion of gene with periventricular nodular heterotopia, periventricular nodular heterotopia 8.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.983
• PP5: Variant 1-228097609-A-G is Pathogenic according to our data. Variant chr1-228097609-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 1343804.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=1, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ARF1	NM_001658.4	c.278A>G	p.Asp93Gly	missense_variant	4/5	ENST00000272102.10	NP_001649.1
ARF1	NM_001024226.2	c.278A>G	p.Asp93Gly	missense_variant	4/5		NP_001019397.1
ARF1	NM_001024227.1	c.278A>G	p.Asp93Gly	missense_variant	4/5		NP_001019398.1
ARF1	NM_001024228.2	c.278A>G	p.Asp93Gly	missense_variant	4/5		NP_001019399.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ARF1	ENST00000272102.10	c.278A>G	p.Asp93Gly	missense_variant	4/5	1	NM_001658.4	ENSP00000272102	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Periventricular nodular heterotopia 8 Pathogenic:1 Uncertain:1

Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Jun 13, 2021	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Groupe Hospitalier Pitie Salpetriere, UF Genomique du Developpement, Assistance Publique Hopitaux de Paris	Mar 12, 2022	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.45	D
BayesDel_noAF	Pathogenic	0.41
CADD	Pathogenic	31
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.72	D;D;D
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.95
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.91	.;.;D
M_CAP	Pathogenic	0.36	D
MetaRNN	Pathogenic	0.98	D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	5.1	H;H;H
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-6.2	D;D;D
REVEL	Pathogenic	0.93
Sift	Pathogenic	0.0	D;D;D
Sift4G	Pathogenic	0.0010	D;D;D
Polyphen		1.0	D;D;D
Vest4		0.99
MutPred		0.91		Loss of catalytic residue at D93 (P = 0.1133);Loss of catalytic residue at D93 (P = 0.1133);Loss of catalytic residue at D93 (P = 0.1133);
MVP		0.98
MPC		3.3
ClinPred		1.0	D
GERP RS		5.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.9
Varity_R		0.94
gMVP		1.0

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-228285310;