2-96129869-T-C

Position:

• chr2-96129869-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001002036.4(ASTL):​c.829A>G​(p.Lys277Glu) 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. 14/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K277Q) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: ASTL NM_001002036.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.866

Genes affected

ASTL (HGNC:31704): (astacin like metalloendopeptidase) Predicted to enable aspartic-type peptidase activity; glutamic-type peptidase activity; and metalloendopeptidase activity. Predicted to be involved in several processes, including negative regulation of binding activity of sperm to zona pellucida; positive regulation of protein processing; and prevention of polyspermy. Predicted to be located in cortical granule and plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2648425).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ASTL	NM_001002036.4	c.829A>G	p.Lys277Glu	missense_variant	8/9	ENST00000342380.3	NP_001002036.3
ASTL	XM_011511205.3	c.844A>G	p.Lys282Glu	missense_variant	7/8		XP_011509507.1
ASTL	XM_011511207.3	c.790A>G	p.Lys264Glu	missense_variant	7/8		XP_011509509.1
ASTL	XM_011511208.3	c.734+195A>G		intron_variant			XP_011509510.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ASTL	ENST00000342380.3	c.829A>G	p.Lys277Glu	missense_variant	8/9	1	NM_001002036.4	ENSP00000343674	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1443696 Hom.: 0 Cov.: 37 AF XY: 0.00 AC XY: 0 AN XY: 715008

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

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	19
DANN	Uncertain	0.98
DEOGEN2	Benign	0.21	T
Eigen	Benign	-0.58
Eigen_PC	Benign	-0.64
FATHMM_MKL	Benign	0.48	N
LIST_S2	Benign	0.54	T
M_CAP	Benign	0.046	D
MetaRNN	Benign	0.26	T
MetaSVM	Benign	-0.73	T
MutationAssessor	Benign	1.1	L
MutationTaster	Benign	1.0	P
PrimateAI	Uncertain	0.50	T
PROVEAN	Benign	-2.3	N
REVEL	Benign	0.16
Sift	Benign	0.073	T
Sift4G	Benign	0.087	T
Polyphen		0.22	B
Vest4		0.14
MutPred		0.54		Loss of MoRF binding (P = 0.0028);
MVP		0.60
MPC		0.22
ClinPred		0.23	T
GERP RS		-2.3
Varity_R		0.29
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

LitVar

Other links and lift over

dbSNP: rs1657502; hg19: chr2-96795608;