12-57091738-G-T

Position:

• chr12-57091738-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005967.4(NAB2):​c.697G>T​(p.Gly233Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,772 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: NAB2 NM_005967.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.64

Genes affected

NAB2 (HGNC:7627): (NGFI-A binding protein 2) This gene encodes a member of the family of NGFI-A binding (NAB) proteins, which function in the nucleus to repress transcription induced by some members of the EGR (early growth response) family of transactivators. NAB proteins can homo- or hetero-multimerize with other EGR or NAB proteins through a conserved N-terminal domain, and repress transcription through two partially redundant C-terminal domains. Transcriptional repression by the encoded protein is mediated in part by interactions with the nucleosome remodeling and deactylase (NuRD) complex. Alternatively spliced transcript variants have been described, but their biological validity has not been determined. [provided by RefSeq, Jul 2008]

NAB2 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.23315567).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NAB2	NM_005967.4	c.697G>T	p.Gly233Cys	missense_variant	2/7	ENST00000300131.8	NP_005958.1
NAB2	NM_001330305.2	c.697G>T	p.Gly233Cys	missense_variant	2/6		NP_001317234.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NAB2	ENST00000300131.8	c.697G>T	p.Gly233Cys	missense_variant	2/7	1	NM_005967.4	ENSP00000300131.3
NAB2	ENST00000342556.6	c.697G>T	p.Gly233Cys	missense_variant	2/6	5		ENSP00000341491.6
NAB2	ENST00000554718.1	n.713G>T		non_coding_transcript_exon_variant	2/2	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461772 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727186

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

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

Aug 15, 2024

The c.697G>T (p.G233C) alteration is located in exon 2 (coding exon 2) of the NAB2 gene. This alteration results from a G to T substitution at nucleotide position 697, causing the glycine (G) at amino acid position 233 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	0.085
BayesDel_addAF	Benign	-0.060	T
BayesDel_noAF	Benign	-0.32
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.19	T;.
Eigen	Benign	-0.27
Eigen_PC	Benign	-0.37
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Benign	0.76	T;T
M_CAP	Benign	0.039	D
MetaRNN	Benign	0.23	T;T
MetaSVM	Benign	-0.84	T
MutationAssessor	Benign	0.34	N;N
PrimateAI	Uncertain	0.54	T
PROVEAN	Benign	-0.75	N;N
REVEL	Benign	0.15
Sift	Benign	0.056	.;T
Sift4G	Benign	0.073	T;T
Polyphen		0.99	D;.
Vest4		0.43
MutPred		0.38		Loss of helix (P = 0.0376);Loss of helix (P = 0.0376);
MVP		0.33
MPC		2.0
ClinPred		0.54	D
GERP RS		1.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.50
gMVP		0.59

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: chr12-57485521;