1-35892655-C-T

Variant names:

• chr1-35892655-C-T
• NM_012199.5:c.308C>T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_012199.5(AGO1):​c.308C>T​(p.Ala103Val) 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 benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: AGO1 NM_012199.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 7.91

Genes affected

AGO1 (HGNC:3262): (argonaute RISC component 1) This gene encodes a member of the argonaute family of proteins, which associate with small RNAs and have important roles in RNA interference (RNAi) and RNA silencing. This protein binds to microRNAs (miRNAs) or small interfering RNAs (siRNAs) and represses translation of mRNAs that are complementary to them. It is also involved in transcriptional gene silencing (TGS) of promoter regions that are complementary to bound short antigene RNAs (agRNAs), as well as in the degradation of miRNA-bound mRNA targets. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. A recent study showed this gene to be an authentic stop codon readthrough target, and that its mRNA could give rise to an additional C-terminally extended isoform by use of an alternative in-frame translation termination codon. [provided by RefSeq, Nov 2015]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.30936044).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AGO1	NM_012199.5	c.308C>T	p.Ala103Val	missense_variant	Exon 3 of 19	ENST00000373204.6	NP_036331.1
AGO1	NM_001317122.2	c.308C>T	p.Ala103Val	missense_variant	Exon 3 of 19		NP_001304051.1
AGO1	NM_001317123.2	c.83C>T	p.Ala28Val	missense_variant	Exon 3 of 19		NP_001304052.1
AGO1	XM_011541236.3	c.308C>T	p.Ala103Val	missense_variant	Exon 3 of 19		XP_011539538.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AGO1	ENST00000373204.6	c.308C>T	p.Ala103Val	missense_variant	Exon 3 of 19	1	NM_012199.5	ENSP00000362300.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Jan 09, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.308C>T (p.A103V) alteration is located in exon 3 (coding exon 3) of the AGO1 gene. This alteration results from a C to T substitution at nucleotide position 308, causing the alanine (A) at amino acid position 103 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided Uncertain:1

Aug 08, 2024

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis indicates that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.19
BayesDel_addAF	Benign	0.0023	T
BayesDel_noAF	Benign	-0.23
CADD	Uncertain	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.31	.;T
Eigen	Uncertain	0.20
Eigen_PC	Uncertain	0.39
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.96	D;D
M_CAP	Benign	0.011	T
MetaRNN	Benign	0.31	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.8	.;L
PrimateAI	Pathogenic	0.82	D
PROVEAN	Benign	-1.1	N;N
REVEL	Benign	0.24
Sift	Uncertain	0.0080	D;D
Sift4G	Benign	0.085	T;T
Polyphen		0.045	.;B
Vest4		0.51
MutPred		0.56		.;Loss of catalytic residue at A103 (P = 0.0739);
MVP		0.61
MPC		1.2
ClinPred		0.81	D
GERP RS		5.7
Varity_R		0.28
gMVP		0.60

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-36358256;