1-45340226-C-G

Variant names:

• chr1-45340226-C-G
• rs755928199
• NM_001128425.2:c.29G>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM1 BP4_Strong

The NM_001128425.2(MUTYH):​c.29G>C​(p.Arg10Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000547 in 1,461,482 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R10C) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: MUTYH NM_001128425.2 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:6
• Conservation: PhyloP100: -0.382
• Publications: 2 publications found

Genes affected

MUTYH (HGNC:7527): (mutY DNA glycosylase) This gene encodes a DNA glycosylase involved in oxidative DNA damage repair. The enzyme excises adenine bases from the DNA backbone at sites where adenine is inappropriately paired with guanine, cytosine, or 8-oxo-7,8-dihydroguanine, a major oxidatively damaged DNA lesion. The protein is localized to the nucleus and mitochondria. This gene product is thought to play a role in signaling apoptosis by the introduction of single-strand breaks following oxidative damage. Mutations in this gene result in heritable predisposition to colorectal cancer, termed MUTYH-associated polyposis (MAP). Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2017]

TOE1 (HGNC:15954): (target of EGR1, exonuclease) Enables poly(A)-specific ribonuclease activity and snRNA binding activity. Involved in RNA phosphodiester bond hydrolysis, exonucleolytic and snRNA 3'-end processing. Located in Cajal body and cytoplasm. Implicated in pontocerebellar hypoplasia type 7. [provided by Alliance of Genome Resources, Apr 2022]

TOE1 Gene-Disease associations (from GenCC):

• pontocerebellar hypoplasia type 7

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, PanelApp Australia, Labcorp Genetics (formerly Invitae), Orphanet, G2P

ENSG00000288208 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 5 benign, 53 uncertain in NM_001128425.2
• BP4: Computational evidence support a benign effect (MetaRNN=0.060384065).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001128425.2. 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
	MUTYH	NM_001128425.2	MANE Plus Clinical	c.29G>C	p.Arg10Pro	missense	Exon 1 of 16	NP_001121897.1	E5KP25
	TOE1	NM_025077.4	MANE Select	c.-27C>G		5_prime_UTR	Exon 1 of 8	NP_079353.3
	MUTYH	NM_012222.3		c.29G>C	p.Arg10Pro	missense	Exon 1 of 16	NP_036354.1	Q9UIF7-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MUTYH	ENST00000710952.2	MANE Plus Clinical	c.29G>C	p.Arg10Pro	missense	Exon 1 of 16	ENSP00000518552.2	E5KP25
	MUTYH	ENST00000372098.7	TSL:1	c.29G>C	p.Arg10Pro	missense	Exon 1 of 16	ENSP00000361170.3	Q9UIF7-1
	MUTYH	ENST00000372110.7	TSL:1	c.29G>C	p.Arg10Pro	missense	Exon 1 of 16	ENSP00000361182.3	Q9UIF7-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000401 AC: 1 AN: 249550 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000889

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461482 Hom.: 0 Cov.: 33 AF XY: 0.00000550 AC XY: 4 AN XY: 727058

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

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86252

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53056

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000630 AC: 7 AN: 1111992

Other (OTH) AF: 0.0000166 AC: 1 AN: 60388

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	3	-	Familial adenomatous polyposis 2 (3)
-	2	-	Hereditary cancer-predisposing syndrome (2)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.56
CADD	Benign	9.7
DANN	Benign	0.86
DEOGEN2	Benign	0.036	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.079	N
LIST_S2	Benign	0.53	T
M_CAP	Benign	0.0034	T
MetaRNN	Benign	0.060	T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	0.90	L
PhyloP100		-0.38
PrimateAI	Benign	0.27	T
PROVEAN	Benign	0.11	N
REVEL	Benign	0.030
Sift	Uncertain	0.028	D
Sift4G	Benign	0.20	T
Polyphen		0.0010	B
Vest4		0.26
MutPred		0.34		Gain of loop (P = 0.0013)
MVP		0.30
MPC		0.19
ClinPred		0.077	T
GERP RS		0.47
PromoterAI		0.033	Neutral
Varity_R		0.17
gMVP		0.43
Mutation Taster		=98/2	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.15		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: rs755928199; hg19: chr1-45805898;