rs4149853

Variant names:

• chr1-241849106-C-T
• rs4149853
• NM_130398.4:c.-122-6C>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_130398.4(EXO1):​c.-122-6C>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0258 in 152,294 control chromosomes in the GnomAD database, including 168 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.026 (168 hom., cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: EXO1 NM_130398.4 splice_region, intron
• Scores: Splicing: ADA: 0.00009066
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.753
• Publications: 1 publications found

Genes affected

EXO1 (HGNC:3511): (exonuclease 1) This gene encodes a protein with 5' to 3' exonuclease activity as well as an RNase H activity. It is similar to the Saccharomyces cerevisiae protein Exo1 which interacts with Msh2 and which is involved in mismatch repair and recombination. Alternative splicing of this gene results in three transcript variants encoding two different isoforms. [provided by RefSeq, Jul 2008]

EXO1 Gene-Disease associations (from GenCC):

• Lynch syndrome

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0877 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_130398.4. 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
	EXO1	NM_130398.4	MANE Select	c.-122-6C>T		splice_region intron	N/A	NP_569082.2
	EXO1	NM_006027.4		c.-18+79C>T		intron	N/A	NP_006018.4
	EXO1	NM_001319224.2		c.-18+79C>T		intron	N/A	NP_001306153.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EXO1	ENST00000366548.8	TSL:1 MANE Select	c.-122-6C>T		splice_region intron	N/A	ENSP00000355506.3
	EXO1	ENST00000348581.9	TSL:1	c.-18+79C>T		intron	N/A	ENSP00000311873.5
	EXO1	ENST00000518483.5	TSL:1	c.-18+79C>T		intron	N/A	ENSP00000430251.1

Frequencies

GnomAD3 genomes AF: 0.0257 AC: 3915 AN: 152176 Hom.: 167 Cov.: 33

Gnomad AFR AF: 0.0899

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00975

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000735

Gnomad OTH AF: 0.0186

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 8 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 4

African (AFR) AC: 0 AN: 0

American (AMR) AC: 0 AN: 0

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 2

East Asian (EAS) AC: 0 AN: 0

South Asian (SAS) AC: 0 AN: 0

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 2

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 4

Other (OTH) AC: 0 AN: 0

GnomAD4 genome AF: 0.0258 AC: 3936 AN: 152294 Hom.: 168 Cov.: 33 AF XY: 0.0254 AC XY: 1895 AN XY: 74470

African (AFR) AF: 0.0901 AC: 3743 AN: 41532

American (AMR) AF: 0.00967 AC: 148 AN: 15302

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.000207 AC: 1 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10614

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000735 AC: 5 AN: 68034

Other (OTH) AF: 0.0184 AC: 39 AN: 2114

Alfa AF: 0.00996 Hom.: 78

Bravo AF: 0.0304

Asia WGS AF: 0.00664 AC: 23 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	2.0
DANN	Benign	0.31
PhyloP100		-0.75
PromoterAI		0.012	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Mutation Taster		=100/0	polymorphism (auto)

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000091
dbscSNV1_RF	Benign	0.0060
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: rs4149853; hg19: chr1-242012408;