NM_002518.4:c.623T>G

Variant names:

• chr2-100964082-T-G
• NM_002518.4:c.623T>G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_002518.4(NPAS2):​c.623T>G​(p.Phe208Cys) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: NPAS2 NM_002518.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.40

Genes affected

NPAS2 (HGNC:7895): (neuronal PAS domain protein 2) The protein encoded by this gene is a member of the basic helix-loop-helix (bHLH)-PAS family of transcription factors. A similar mouse protein may play a regulatory role in the acquisition of specific types of memory. It also may function as a part of a molecular clock operative in the mammalian forebrain. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NPAS2	NM_002518.4	c.623T>G	p.Phe208Cys	missense_variant	Exon 8 of 21	ENST00000335681.10	NP_002509.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NPAS2	ENST00000335681.10	c.623T>G	p.Phe208Cys	missense_variant	Exon 8 of 21	1	NM_002518.4	ENSP00000338283.5
NPAS2	ENST00000448812.5	c.566-4199T>G		intron_variant	Intron 5 of 6	5		ENSP00000388528.1
NPAS2	ENST00000486017.5	n.670T>G		non_coding_transcript_exon_variant	Exon 7 of 7	3
NPAS2	ENST00000492373.1	n.400T>G		non_coding_transcript_exon_variant	Exon 5 of 6	4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

May 31, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.623T>G (p.F208C) alteration is located in exon 8 (coding exon 7) of the NPAS2 gene. This alteration results from a T to G substitution at nucleotide position 623, causing the phenylalanine (F) at amino acid position 208 to be replaced by a cysteine (C). 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	Benign	0.23
BayesDel_addAF	Uncertain	0.045	T
BayesDel_noAF	Benign	-0.17
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.40	T
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.47
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.87	D
M_CAP	Benign	0.028	D
MetaRNN	Uncertain	0.59	D
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.3	M
PrimateAI	Uncertain	0.69	T
PROVEAN	Pathogenic	-4.7	D
REVEL	Benign	0.18
Sift	Uncertain	0.0090	D
Sift4G	Uncertain	0.011	D
Polyphen		0.16	B
Vest4		0.76
MVP		0.24
MPC		2.1
ClinPred		0.99	D
GERP RS		5.6
Varity_R		0.28
gMVP		0.84

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr2-101580544;