chr1-35893727-C-T

Variant names:

• chr1-35893727-C-T
• rs1553154069
• NM_012199.5:c.566C>T

Variant summary

Our verdict is Pathogenic. The variant received 13 ACMG points: 13P and 0B. PM1 PM2 PP2 PP5_Very_Strong

The NM_012199.5(AGO1):​c.566C>T​(p.Pro189Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,684 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: AGO1 NM_012199.5 missense
• Clinical Significance: Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 7.91
• Publications: 0 publications found

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]

AGO1 Gene-Disease associations (from GenCC):

• neurodevelopmental disorder with language delay and behavioral abnormalities, with or without seizures

  Inheritance: AD Classification: STRONG Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Pathogenic. The variant received 13 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_012199.5
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 9 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Gene score misZ: 5.6761 (above the threshold of 3.09). Trascript score misZ: 6.4282 (above the threshold of 3.09). GenCC associations: The gene is linked to neurodevelopmental disorder with language delay and behavioral abnormalities, with or without seizures.
• PP5: Variant 1-35893727-C-T is Pathogenic according to our data. Variant chr1-35893727-C-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 547981.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AGO1	NM_012199.5	c.566C>T	p.Pro189Leu	missense_variant	Exon 5 of 19	ENST00000373204.6	NP_036331.1
AGO1	NM_001317122.2	c.566C>T	p.Pro189Leu	missense_variant	Exon 5 of 19		NP_001304051.1
AGO1	NM_001317123.2	c.341C>T	p.Pro114Leu	missense_variant	Exon 5 of 19		NP_001304052.1
AGO1	XM_011541236.3	c.566C>T	p.Pro189Leu	missense_variant	Exon 5 of 19		XP_011539538.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AGO1	ENST00000373204.6	c.566C>T	p.Pro189Leu	missense_variant	Exon 5 of 19	1	NM_012199.5	ENSP00000362300.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461684 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727144

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44702

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26116

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86248

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53364

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111934

Other (OTH) AF: 0.00 AC: 0 AN: 60382

GnomAD4 genome Cov.: 32

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:2

Nov 13, 2023

GeneDx

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 34930816, 33144682) -

May 22, 2025

Mayo Clinic Laboratories, Mayo Clinic

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

PS2, PM1, PP2 -

Neurodevelopmental disorder with language delay and behavioral abnormalities, with or without seizures Pathogenic:1

Aug 09, 2024

Institute of Human Genetics, University of Leipzig Medical Center

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Criteria applied: PS2_MOD,PM1,PS4_SUP,PM2_SUP -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.61
BayesDel_addAF	Uncertain	0.047	T
BayesDel_noAF	Benign	-0.17
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.56	.;D
Eigen	Pathogenic	0.86
Eigen_PC	Pathogenic	0.85
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Pathogenic	0.99	D;D
M_CAP	Benign	0.046	D
MetaRNN	Uncertain	0.61	D;D
MetaSVM	Benign	-0.99	T
MutationAssessor	Uncertain	2.8	.;M
PhyloP100		7.9
PrimateAI	Pathogenic	0.89	D
PROVEAN	Pathogenic	-7.4	D;D
REVEL	Uncertain	0.41
Sift	Uncertain	0.0070	D;D
Sift4G	Uncertain	0.039	D;D
Polyphen		0.95	.;P
Vest4		0.58
MutPred		0.61		.;Loss of disorder (P = 0.0206);
MVP		0.62
MPC		2.8
ClinPred		0.99	D
GERP RS		5.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.72
gMVP		0.96
Mutation Taster		=15/85	disease causing

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: rs1553154069; hg19: chr1-36359328;