rs12497655

Positions:

• chr3-117045163-A-G
• chr3-117045163-A-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The XR_007096015.1(LOC124909415):​n.29330-35789T>C variant causes a intron, non coding transcript change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.211 in 152,218 control chromosomes in the GnomAD database, including 4,239 homozygotes. 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: 𝑓 0.21 (4239 hom., cov: 33)
• Consequence: LOC124909415 XR_007096015.1 intron, non_coding_transcript
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.118

Genes affected

LOC124909415 (HGNC:):

LSAMP (HGNC:6705): (limbic system associated membrane protein) This gene encodes a member of the immunoglobulin LAMP, OBCAM and neurotrimin (IgLON) family of proteins. The encoded preproprotein is proteolytically processed to generate a neuronal surface glycoprotein. This protein may act as a selective homophilic adhesion molecule during axon guidance and neuronal growth in the developing limbic system. The encoded protein may also function as a tumor suppressor and may play a role in neuropsychiatric disorders. Alternative splicing results in multiple transcript variants, at least one of which encodes a preproprotein that is proteolytically processed. [provided by RefSeq, Jan 2016]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.341 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LOC124909415	XR_007096015.1	n.29330-35789T>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LSAMP	ENST00000474851.1	c.34-35789T>C		intron_variant		5		ENSP00000418506

Frequencies

GnomAD3 genomes AF: 0.211 AC: 32157 AN: 152100 Hom.: 4233 Cov.: 33

Gnomad AFR AF: 0.0650

Gnomad AMI AF: 0.178

Gnomad AMR AF: 0.229

Gnomad ASJ AF: 0.224

Gnomad EAS AF: 0.354

Gnomad SAS AF: 0.198

Gnomad FIN AF: 0.407

Gnomad MID AF: 0.168

Gnomad NFE AF: 0.257

Gnomad OTH AF: 0.186

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.211 AC: 32179 AN: 152218 Hom.: 4239 Cov.: 33 AF XY: 0.220 AC XY: 16399 AN XY: 74426

Gnomad4 AFR AF: 0.0651

Gnomad4 AMR AF: 0.229

Gnomad4 ASJ AF: 0.224

Gnomad4 EAS AF: 0.355

Gnomad4 SAS AF: 0.199

Gnomad4 FIN AF: 0.407

Gnomad4 NFE AF: 0.257

Gnomad4 OTH AF: 0.190

Alfa AF: 0.233 Hom.: 772

Bravo AF: 0.193

Asia WGS AF: 0.268 AC: 931 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	3.7
DANN	Benign	0.54

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs12497655; hg19: chr3-116764010;