19-14151099-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_014921.5(ADGRL1):c.4184G>A(p.Ser1395Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000722 in 1,384,500 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: ADGRL1 NM_014921.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.31

Genes affected

ADGRL1 (HGNC:20973): (adhesion G protein-coupled receptor L1) This gene encodes a member of the latrophilin subfamily of G-protein coupled receptors (GPCR). Latrophilins may function in both cell adhesion and signal transduction. In experiments with non-human species, endogenous proteolytic cleavage within a cysteine-rich GPS (G-protein-coupled-receptor proteolysis site) domain resulted in two subunits (a large extracellular N-terminal cell adhesion subunit and a subunit with substantial similarity to the secretin/calcitonin family of GPCRs) being non-covalently bound at the cell membrane. Latrophilin-1 has been shown to recruit the neurotoxin from black widow spider venom, alpha-latrotoxin, to the synapse plasma membrane. Alternative splicing results in multiple variants encoding distinct isoforms.[provided by RefSeq, Oct 2008]

ADGRL1-AS1 (HGNC:55309): (ADGRL1 antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, ADGRL1
• BP4: Computational evidence support a benign effect (MetaRNN=0.30963486).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ADGRL1	NM_014921.5	c.4184G>A	p.Ser1395Asn	missense_variant	23/23	ENST00000361434.8
ADGRL1-AS1	NR_045214.1	n.73-4053C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ADGRL1	ENST00000361434.8	c.4184G>A	p.Ser1395Asn	missense_variant	23/23	1	NM_014921.5	A1
ADGRL1-AS1	ENST00000588387.2	n.79-4053C>T		intron_variant, non_coding_transcript_variant		1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.22e-7 AC: 1 AN: 1384500 Hom.: 0 Cov.: 37 AF XY: 0.00 AC XY: 0 AN XY: 681678

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: 9.30e-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

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 08, 2023

The c.4199G>A (p.S1400N) alteration is located in exon 24 (coding exon 23) of the ADGRL1 gene. This alteration results from a G to A substitution at nucleotide position 4199, causing the serine (S) at amino acid position 1400 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	Uncertain	0.48
BayesDel_addAF	Benign	-0.054	T
BayesDel_noAF	Benign	-0.31
Cadd	Pathogenic	26
Dann	Uncertain	0.99
DEOGEN2	Benign	0.19	T;.
Eigen	Uncertain	0.56
Eigen_PC	Uncertain	0.49
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.94	D;D
M_CAP	Pathogenic	0.31	D
MetaRNN	Benign	0.31	T;T
MetaSVM	Uncertain	0.12	D
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.90	D
PROVEAN	Benign	-1.1	N;N
REVEL	Uncertain	0.30
Sift	Benign	0.056	T;T
Sift4G	Benign	0.15	T;T
Polyphen		1.0	D;D
Vest4		0.29
MutPred		0.28		Loss of phosphorylation at S1400 (P = 0.0015);.;
MVP		0.28
MPC		0.95
ClinPred		0.96	D
GERP RS		3.9
Varity_R		0.31
gMVP		0.52

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: rs1191169113; hg19: chr19-14261911;