1-203305628-G-A

Position:

• chr1-203305628-G-A

Variant summary

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

The NM_006763.3(BTG2):​c.22G>A​(p.Asp8Asn) variant causes a missense 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. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: BTG2 NM_006763.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.08

Genes affected

BTG2 (HGNC:1131): (BTG anti-proliferation factor 2) The protein encoded by this gene is a member of the BTG/Tob family. This family has structurally related proteins that appear to have antiproliferative properties. This encoded protein is involved in the regulation of the G1/S transition of the cell cycle. [provided by RefSeq, Jul 2008]

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=0.1588367).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BTG2	NM_006763.3	c.22G>A	p.Asp8Asn	missense_variant	1/2	ENST00000290551.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BTG2	ENST00000290551.5	c.22G>A	p.Asp8Asn	missense_variant	1/2	1	NM_006763.3	P1
BTG2	ENST00000475157.1	c.22G>A	p.Asp8Asn	missense_variant, NMD_transcript_variant	1/3	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1446838 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 718558

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

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

Mar 18, 2024

The c.22G>A (p.D8N) alteration is located in exon 1 (coding exon 1) of the BTG2 gene. This alteration results from a G to A substitution at nucleotide position 22, causing the aspartic acid (D) at amino acid position 8 to be replaced by an asparagine (N). 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	0.097
BayesDel_addAF	Benign	-0.33	T
BayesDel_noAF	Benign	-0.71
CADD	Benign	20
DANN	Uncertain	0.99
DEOGEN2	Benign	0.12	T
Eigen	Benign	-0.32
Eigen_PC	Benign	-0.15
FATHMM_MKL	Benign	0.73	D
LIST_S2	Benign	0.65	T
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.16	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.2	L
MutationTaster	Benign	0.99	D
PrimateAI	Uncertain	0.65	T
PROVEAN	Benign	-0.38	N
REVEL	Benign	0.067
Sift	Benign	0.31	T
Sift4G	Benign	0.45	T
Polyphen		0.0	B
Vest4		0.16
MutPred		0.15		Gain of methylation at K5 (P = 0.1034);
MVP		0.62
MPC		0.43
ClinPred		0.79	D
GERP RS		3.7
Varity_R		0.25
gMVP		0.34

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: chr1-203274756;