rs2304669

Variant names:

• chr2-238257022-T-A
• rs2304669
• NM_022817.3:c.1965A>T

Your query was ambiguous. Multiple possible variants found:

• chr2-238257022-T-A
• chr2-238257022-T-C
• chr2-238257022-T-G

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_022817.3(PER2):​c.1965A>T​(p.Ala655Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. A655A) has been classified as Benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: PER2 NM_022817.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.552
• Publications: 30 publications found

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 Gene-Disease associations (from GenCC):

• advanced sleep phase syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• advanced sleep phase syndrome 1

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.75).
• BP7: Synonymous conserved (PhyloP=-0.552 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PER2	NM_022817.3	c.1965A>T	p.Ala655Ala	synonymous_variant	Exon 17 of 23	ENST00000254657.8	NP_073728.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PER2	ENST00000254657.8	c.1965A>T	p.Ala655Ala	synonymous_variant	Exon 17 of 23	1	NM_022817.3	ENSP00000254657.3
PER2	ENST00000707129.1	c.1965A>T	p.Ala655Ala	synonymous_variant	Exon 17 of 23			ENSP00000516757.1
PER2	ENST00000707130.1	c.1965A>T	p.Ala655Ala	synonymous_variant	Exon 17 of 23			ENSP00000516758.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 3567

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.75
CADD	Benign	0.35
DANN	Benign	0.77
PhyloP100		-0.55
Mutation Taster		=100/0	polymorphism

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: rs2304669; hg19: chr2-239165663;