1-103660486-A-G

Position:

• chr1-103660486-A-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_004038.4(AMY1A):​c.1001+4A>G variant causes a splice donor region, intron 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 17)
• Consequence: AMY1A NM_004038.4 splice_donor_region, intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.673

Genes affected

AMY1A (HGNC:474): (amylase alpha 1A) Amylases are secreted proteins that hydrolyze 1,4-alpha-glucoside bonds in oligosaccharides and polysaccharides, and thus catalyze the first step in digestion of dietary starch and glycogen. The human genome has a cluster of several amylase genes that are expressed at high levels in either salivary gland or pancreas. This gene encodes an amylase isoenzyme produced by the salivary gland. Alternative splicing results in multiple transcript variants encoding the same protein. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.86).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
AMY1A	NM_004038.4	c.1001+4A>G		splice_donor_region_variant, intron_variant		ENST00000370083.9	NP_004029.2
AMY1A	NM_001008221.1	c.1001+4A>G		splice_donor_region_variant, intron_variant			NP_001008222.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
AMY1A	ENST00000370083.9	c.1001+4A>G		splice_donor_region_variant, intron_variant		1	NM_004038.4	ENSP00000359100	P1

Frequencies

GnomAD3 genomes Cov.: 17

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 17

Bravo AF: 0.000230

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.86
CADD	Benign	13
DANN	Benign	0.55

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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: rs596356; hg19: chr1-104203108;