NM_001658.4:c.103T>C

Variant names:

• chr1-228097217-T-C
• rs879036238
• NM_001658.4:c.103T>C

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PM1 PM2 PM5 PP2 PP3_Moderate PP5

The NM_001658.4(ARF1):​c.103T>C​(p.Tyr35His) 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. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y35D) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ARF1 NM_001658.4 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.95
• Publications: 5 publications found

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]

MIR3620 (HGNC:38917): (microRNA 3620) microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene expression in multicellular organisms by affecting both the stability and translation of mRNAs. miRNAs are transcribed by RNA polymerase II as part of capped and polyadenylated primary transcripts (pri-miRNAs) that can be either protein-coding or non-coding. The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70-nt stem-loop precursor miRNA (pre-miRNA), which is further cleaved by the cytoplasmic Dicer ribonuclease to generate the mature miRNA and antisense miRNA star (miRNA*) products. The mature miRNA is incorporated into a RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing with the miRNA and most commonly results in translational inhibition or destabilization of the target mRNA. The RefSeq represents the predicted microRNA stem-loop. [provided by RefSeq, Sep 2009]

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PM1: In a chain ADP-ribosylation factor 1 (size 179) in uniprot entity ARF1_HUMAN there are 14 pathogenic changes around while only 0 benign (100%) in NM_001658.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr1-228097217-T-G is described in ClinVar as Pathogenic. ClinVar VariationId is 1343802.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 10 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Trascript score misZ: 4.1509 (above the threshold of 3.09). GenCC associations: The gene is linked to periventricular nodular heterotopia, periventricular nodular heterotopia 8.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.917
• PP5: Variant 1-228097217-T-C is Pathogenic according to our data. Variant chr1-228097217-T-C is described in ClinVar as Pathogenic. ClinVar VariationId is 590332.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001658.4. 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
	ARF1	NM_001658.4	MANE Select	c.103T>C	p.Tyr35His	missense	Exon 2 of 5	NP_001649.1	P84077
	ARF1	NM_001024226.2		c.103T>C	p.Tyr35His	missense	Exon 2 of 5	NP_001019397.1	P84077
	ARF1	NM_001024227.1		c.103T>C	p.Tyr35His	missense	Exon 2 of 5	NP_001019398.1	P84077

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ARF1	ENST00000272102.10	TSL:1 MANE Select	c.103T>C	p.Tyr35His	missense	Exon 2 of 5	ENSP00000272102.5	P84077
	ARF1	ENST00000470558.5	TSL:2	c.103T>C	p.Tyr35His	missense	Exon 2 of 5	ENSP00000514654.1	P84077
	ARF1	ENST00000478336.5	TSL:2	c.103T>C	p.Tyr35His	missense	Exon 2 of 5	ENSP00000514657.1	P84077

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Periventricular nodular heterotopia 8 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	-0.030
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.39	T
Eigen	Pathogenic	0.74
Eigen_PC	Uncertain	0.66
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Benign	0.76	T
M_CAP	Uncertain	0.17	D
MetaRNN	Pathogenic	0.92	D
MetaSVM	Uncertain	0.59	D
MutationAssessor	Pathogenic	2.9	M
PhyloP100		8.0
PrimateAI	Pathogenic	0.92	D
PROVEAN	Uncertain	-4.2	D
REVEL	Pathogenic	0.80
Sift	Uncertain	0.0080	D
Sift4G	Uncertain	0.011	D
Polyphen		1.0	D
Vest4		0.87
MutPred		0.74		Loss of ubiquitination at K30 (P = 0.069)
MVP		0.89
MPC		2.5
ClinPred		0.99	D
GERP RS		4.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.75
gMVP		0.91
Mutation Taster		=4/96	disease causing (ClinVar)

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: rs879036238; hg19: chr1-228284918;