Genetic Variant PER2:p.Met1140Ile (chr2-238250598-C-A) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_022817.3(PER2):c.3420G>T(p.Met1140Ile) variant causes a missense change. The variant allele was found at a frequency of 0.000217 in 1,613,800 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00024 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00022 ( 1 hom. )

Consequence

PER2
NM_022817.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.69

Variant links:

Genes affected

PER2 (HGNC:8846): (period circadian regulator 2) This gene is a member of the Period family of genes and is expressed in a circadian pattern in the suprachiasmatic nucleus, the primary circadian pacemaker in the mammalian brain. Genes in this family encode components of the circadian rhythms of locomotor activity, metabolism, and behavior. This gene is upregulated by CLOCK/ARNTL heterodimers but then represses this upregulation in a feedback loop using PER/CRY heterodimers to interact with CLOCK/ARNTL. Polymorphisms in this gene may increase the risk of getting certain cancers and have been linked to sleep disorders. [provided by RefSeq, Jan 2014]

PER2 links:

ENSG00000225057 (HGNC:):

ENSG00000225057 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.13767707).

BS2

High AC in GnomAd4 at 36 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PER2	NM_022817.3 link	c.3420G>T	p.Met1140Ile	missense_variant	Exon 21 of 23	ENST00000254657.8	NP_073728.1	O15055-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
PER2	ENST00000254657.8 link	c.3420G>T	p.Met1140Ile	missense_variant	Exon 21 of 23	1	NM_022817.3	ENSP00000254657.3	O15055-1
PER2	ENST00000707129.1 link	c.3420G>T	p.Met1140Ile	missense_variant	Exon 21 of 23			ENSP00000516757.1	O15055-1
PER2	ENST00000707130.1 link	c.3420G>T	p.Met1140Ile	missense_variant	Exon 21 of 23			ENSP00000516758.1	O15055-1
ENSG00000225057	ENST00000456601.1 link	n.1524+3081C>A		intron_variant	Intron 5 of 6	2

Frequencies

GnomAD3 genomes

AF:

0.000236

AC:

AN:

152232

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000514

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000207

AC:

AN:

250932

Hom.:

AF XY:

0.000162

AC XY:

AN XY:

135670

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.0000993

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000925

Gnomad NFE exome

AF:

0.000406

Gnomad OTH exome

AF:

0.000490

GnomAD4 exome

AF:

0.000216

AC:

315

AN:

1461568

Hom.:

Cov.:

AF XY:

0.000235

AC XY:

171

AN XY:

727070

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.000115

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.000131

Gnomad4 NFE exome

AF:

0.000266

Gnomad4 OTH exome

AF:

0.000132

GnomAD4 genome

AF:

0.000236

AC:

AN:

152232

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

AN XY:

74372

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.000514

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000305

Hom.:

Bravo

AF:

0.000208

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000264

AC:

EpiCase

AF:

0.000600

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 20, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.3420G>T (p.M1140I) alteration is located in exon 21 (coding exon 20) of the PER2 gene. This alteration results from a G to T substitution at nucleotide position 3420, causing the methionine (M) at amino acid position 1140 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.51

BayesDel_addAF

Benign

-0.45

BayesDel_noAF

Benign

-0.50

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.15

Eigen

Uncertain

0.26

Eigen_PC

Uncertain

0.34

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.95

M_CAP

Benign

0.0080

MetaRNN

Benign

0.14

MetaSVM

Benign

-1.1

MutationAssessor

Pathogenic

3.0

PrimateAI

Benign

0.37

PROVEAN

Uncertain

-2.5

REVEL

Benign

0.078

Sift

Benign

0.20

Sift4G

Benign

0.25

Polyphen

0.67

Vest4

0.38

MutPred

0.35

Loss of catalytic residue at M1140 (P = 3e-04);

MVP

0.26

MPC

0.32

ClinPred

0.42

GERP RS

4.6

Varity_R

0.59

gMVP

0.49

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over