4-139045020-G-T

Position:

• chr4-139045020-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_012118.4(NOCT):​c.842G>T​(p.Cys281Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: NOCT NM_012118.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.56

Genes affected

NOCT (HGNC:14254): (nocturnin) The protein encoded by this gene is highly similar to Nocturnin, a gene identified as a circadian clock regulated gene in Xenopus laevis. This protein and Nocturnin protein share similarity with the C-terminal domain of a yeast transcription factor, carbon catabolite repression 4 (CCR4). The mRNA abundance of a similar gene in mouse has been shown to exhibit circadian rhythmicity, which suggests a role for this protein in clock function or as a circadian clock effector. [provided by RefSeq, Jul 2008]

ELF2 (HGNC:3317): (E74 like ETS transcription factor 2) Enables DNA-binding transcription factor activity, RNA polymerase II-specific and sequence-specific double-stranded DNA binding activity. Involved in negative regulation of transcription, DNA-templated; positive regulation of transcription, DNA-templated; and regulation of transcription by RNA polymerase II. Located in cytosol and nuclear body. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.875

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NOCT	NM_012118.4	c.842G>T	p.Cys281Phe	missense_variant	3/3	ENST00000280614.4	NP_036250.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NOCT	ENST00000280614.4	c.842G>T	p.Cys281Phe	missense_variant	3/3	1	NM_012118.4	ENSP00000280614	P1
NOCT	ENST00000515616.1	n.654G>T		non_coding_transcript_exon_variant	2/2	1
NOCT	ENST00000630479.1	c.*505-542G>T		intron_variant, NMD_transcript_variant		5		ENSP00000486546
ELF2	ENST00000515489.1	n.272+15304C>A		intron_variant, non_coding_transcript_variant		2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 27, 2024

The c.842G>T (p.C281F) alteration is located in exon 3 (coding exon 3) of the NOCT gene. This alteration results from a G to T substitution at nucleotide position 842, causing the cysteine (C) at amino acid position 281 to be replaced by a phenylalanine (F). 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	Pathogenic	0.85
BayesDel_addAF	Pathogenic	0.41	D
BayesDel_noAF	Pathogenic	0.35
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.46	T
Eigen	Pathogenic	0.71
Eigen_PC	Pathogenic	0.71
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.95	D
M_CAP	Uncertain	0.25	D
MetaRNN	Pathogenic	0.87	D
MetaSVM	Uncertain	0.17	D
MutationAssessor	Pathogenic	3.0	M
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.66	T
PROVEAN	Pathogenic	-8.8	D
REVEL	Pathogenic	0.74
Sift	Uncertain	0.0060	D
Sift4G	Uncertain	0.022	D
Polyphen		0.98	D
Vest4		0.69
MutPred		0.52		Gain of MoRF binding (P = 0.1034);
MVP		0.87
MPC		1.2
ClinPred		1.0	D
GERP RS		5.5
Varity_R		0.95
gMVP		0.89

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: chr4-139966174;