NM_001772.4:c.1A>G

Variant names:

• chr19-51225119-A-G
• rs1599865323
• NM_001772.4:c.1A>G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PVS1_Supporting PM2

The NM_001772.4(CD33):​c.1A>G​(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CD33 NM_001772.4 start_lost
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.230

Genes affected

CD33 (HGNC:1659): (CD33 molecule) Enables protein phosphatase binding activity and sialic acid binding activity. Involved in several processes, including negative regulation of cytokine production; negative regulation of monocyte activation; and positive regulation of protein tyrosine phosphatase activity. Located in several cellular components, including Golgi apparatus; external side of plasma membrane; and peroxisome. [provided by Alliance of Genome Resources, Apr 2022]

LOC107985327 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PVS1: Start lost variant, no pathogenic variants between lost start and next in-frame start position. Next in-frame start position is after 48 CDS bases. Genomic position: 51225228. Lost 0.044 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CD33	NM_001772.4	c.1A>G	p.Met1?	start_lost	Exon 1 of 7	ENST00000262262.5	NP_001763.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CD33	ENST00000262262.5	c.1A>G	p.Met1?	start_lost	Exon 1 of 7	1	NM_001772.4	ENSP00000262262.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Sep 01, 2017

CeGaT Center for Human Genetics Tuebingen

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.089	T
BayesDel_noAF	Benign	-0.37
CADD	Benign	1.8
DANN	Benign	0.78
DEOGEN2	Benign	0.17	.;.;.;T
Eigen	Benign	-0.83
Eigen_PC	Benign	-0.93
FATHMM_MKL	Benign	0.30	N
LIST_S2	Uncertain	0.90	D;D;D;D
M_CAP	Benign	0.024	T
MetaRNN	Pathogenic	0.96	D;D;D;D
MetaSVM	Benign	-1.1	T
PROVEAN	Benign	-0.38	N;N;N;N
REVEL	Benign	0.12
Sift	Pathogenic	0.0	D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;D
Polyphen		0.054	.;.;.;B
Vest4		0.65
MutPred		0.92		Gain of catalytic residue at M1 (P = 0.0448);Gain of catalytic residue at M1 (P = 0.0448);Gain of catalytic residue at M1 (P = 0.0448);Gain of catalytic residue at M1 (P = 0.0448);
MVP		0.37
ClinPred		0.17	T
GERP RS		1.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.76
gMVP		0.29

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1599865323; hg19: chr19-51728375;