19-51454242-C-G

Variant names:

• chr19-51454242-C-G
• rs566841709
• NM_014442.3:c.1222G>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_014442.3(SIGLEC8):​c.1222G>C​(p.Ala408Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,836 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 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. A408T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SIGLEC8 NM_014442.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.767
• Publications: 0 publications found

Genes affected

SIGLEC8 (HGNC:10877): (sialic acid binding Ig like lectin 8) Sialic acid-binding immunoglobulin (Ig)-like lectins, or SIGLECs (e.g., CD33 (MIM 159590)), are a family of type 1 transmembrane proteins each having a unique expression pattern, mostly in hemopoietic cells. SIGLEC8 is a member of the CD33-like subgroup of SIGLECs, which are localized to 19q13.3-q13.4 and have 2 conserved cytoplasmic tyrosine-based motifs: an immunoreceptor tyrosine-based inhibitory motif, or ITIM (see MIM 604964), and a motif homologous to one identified in signaling lymphocyte activation molecule (SLAM; MIM 603492) that mediates an association with SLAM-associated protein (SAP; MIM 300490) (summarized by Foussias et al., 2000 [PubMed 11095983]).[supplied by OMIM, May 2010]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.09450567).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_014442.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SIGLEC8	NM_014442.3	MANE Select	c.1222G>C	p.Ala408Pro	missense	Exon 6 of 7	NP_055257.2	Q9NYZ4-1
	SIGLEC8	NM_001363548.1		c.943G>C	p.Ala315Pro	missense	Exon 5 of 6	NP_001350477.1	Q9NYZ4-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SIGLEC8	ENST00000321424.7	TSL:1 MANE Select	c.1222G>C	p.Ala408Pro	missense	Exon 6 of 7	ENSP00000321077.2	Q9NYZ4-1
	SIGLEC8	ENST00000340550.5	TSL:1	c.943G>C	p.Ala315Pro	missense	Exon 5 of 6	ENSP00000339448.4	Q9NYZ4-2
	SIGLEC8	ENST00000853029.1		c.1189G>C	p.Ala397Pro	missense	Exon 6 of 7	ENSP00000523088.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461836 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727218

African (AFR) AF: 0.00 AC: 0 AN: 33472

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5756

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111990

Other (OTH) AF: 0.00 AC: 0 AN: 60390

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	0.55
DANN	Benign	0.42
DEOGEN2	Benign	0.0029	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.0043	N
LIST_S2	Benign	0.60	T
M_CAP	Benign	0.0035	T
MetaRNN	Benign	0.095	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.32	N
PhyloP100		-0.77
PrimateAI	Benign	0.34	T
PROVEAN	Benign	-1.4	N
REVEL	Benign	0.068
Sift	Benign	0.12	T
Sift4G	Benign	0.40	T
Polyphen		0.098	B
Vest4		0.16
MutPred		0.43		Gain of methylation at K407 (P = 0.061)
MVP		0.49
MPC		0.28
ClinPred		0.052	T
GERP RS		-0.39
Varity_R		0.043
gMVP		0.11
Mutation Taster		=98/2	polymorphism

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

Other links and lift over

dbSNP: rs566841709; hg19: chr19-51957496;