chr18-45837788-G-C

Position:

• chr18-45837788-G-C

Variant summary

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

The NM_213602.3(SIGLEC15):​c.388G>C​(p.Glu130Gln) variant causes a missense change. The variant allele was found at a frequency of 0.00000073 in 1,370,754 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.3e-7 (0 hom.)
• Consequence: SIGLEC15 NM_213602.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.36

Genes affected

SIGLEC15 (HGNC:27596): (sialic acid binding Ig like lectin 15) Predicted to be involved in regulation of actin cytoskeleton organization; regulation of bone resorption; and regulation of osteoclast development. Predicted to be integral component of membrane. Predicted to be part of protein-containing complex. Predicted to be active in plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

EPG5 (HGNC:29331): (ectopic P-granules 5 autophagy tethering factor) This gene encodes a large coiled coil domain-containing protein that functions in autophagy during starvation conditions. Mutations in this gene cause Vici syndrome. [provided by RefSeq, Aug 2015]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SIGLEC15	NM_213602.3	c.388G>C	p.Glu130Gln	missense_variant	3/6	ENST00000389474.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SIGLEC15	ENST00000389474.8	c.388G>C	p.Glu130Gln	missense_variant	3/6	1	NM_213602.3	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.30e-7 AC: 1 AN: 1370754 Hom.: 0 Cov.: 32 AF XY: 0.00000148 AC XY: 1 AN XY: 677734

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: 0.0000128

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.0000113

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

Jul 26, 2022

The c.388G>C (p.E130Q) alteration is located in exon 3 (coding exon 3) of the SIGLEC15 gene. This alteration results from a G to C substitution at nucleotide position 388, causing the glutamic acid (E) at amino acid position 130 to be replaced by a glutamine (Q). 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	0.20
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.44
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Benign	0.0023	T
Eigen	Uncertain	0.51
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.51	T
M_CAP	Uncertain	0.087	D
MetaRNN	Uncertain	0.42	T
MetaSVM	Benign	-0.42	T
MutationAssessor	Benign	1.1	L
MutationTaster	Benign	1.0	D;N
PrimateAI	Pathogenic	0.80	T
PROVEAN	Benign	-0.56	N
REVEL	Benign	0.21
Sift	Benign	0.28	T
Sift4G	Benign	0.14	T
Polyphen		0.99	D
Vest4		0.23
MutPred		0.47		Gain of MoRF binding (P = 0.0202);
MVP		0.75
MPC		1.2
ClinPred		0.93	D
GERP RS		3.7
Varity_R		0.17
gMVP		0.43

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs1408072461; hg19: chr18-43417753;