chr20-1635533-T-G

Variant names:

• chr20-1635533-T-G
• rs1024803591
• NM_018556.4:c.815A>C

Variant summary

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

The NM_018556.4(SIRPG):​c.815A>C​(p.Gln272Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,230 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q272R) has been classified as Uncertain significance.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
• Consequence: SIRPG NM_018556.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0260
• Publications: 0 publications found

Genes affected

SIRPG (HGNC:15757): (signal regulatory protein gamma) The protein encoded by this gene is a member of the signal-regulatory protein (SIRP) family, and also belongs to the immunoglobulin superfamily. SIRP family members are receptor-type transmembrane glycoproteins known to be involved in the negative regulation of receptor tyrosine kinase-coupled signaling processes. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

SIRPG-AS1 (HGNC:51229): (SIRPG antisense RNA 1)

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018556.4. 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
	SIRPG	NM_018556.4	MANE Select	c.815A>C	p.Gln272Pro	missense	Exon 4 of 6	NP_061026.2	Q9P1W8-1
	SIRPG	NM_001039508.2		c.748+655A>C		intron	N/A	NP_001034597.1	Q9P1W8-4
	SIRPG	NM_080816.3		c.431-5227A>C		intron	N/A	NP_543006.2	Q9P1W8-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SIRPG	ENST00000303415.7	TSL:1 MANE Select	c.815A>C	p.Gln272Pro	missense	Exon 4 of 6	ENSP00000305529.3	Q9P1W8-1
	SIRPG	ENST00000381580.5	TSL:1	c.716A>C	p.Gln239Pro	missense	Exon 4 of 6	ENSP00000370992.1	Q9P1W8-2
	SIRPG	ENST00000216927.4	TSL:1	c.748+655A>C		intron	N/A	ENSP00000216927.4	Q9P1W8-4

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152230 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 74

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152230 Hom.: 0 Cov.: 33 AF XY: 0.0000134 AC XY: 1 AN XY: 74372

African (AFR) AF: 0.0000241 AC: 1 AN: 41458

American (AMR) AF: 0.00 AC: 0 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5200

South Asian (SAS) AF: 0.00 AC: 0 AN: 4834

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10620

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68038

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.50
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	18
DANN	Uncertain	0.99
DEOGEN2	Benign	0.017	T
Eigen	Benign	-0.14
Eigen_PC	Benign	-0.39
FATHMM_MKL	Benign	0.17	N
LIST_S2	Uncertain	0.89	D
M_CAP	Benign	0.0029	T
MetaRNN	Uncertain	0.46	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Pathogenic	2.9	M
PhyloP100		-0.026
PrimateAI	Benign	0.26	T
PROVEAN	Uncertain	-4.1	D
REVEL	Benign	0.15
Sift	Uncertain	0.0060	D
Sift4G	Uncertain	0.013	D
Polyphen		0.99	D
Vest4		0.34
MutPred		0.60		Loss of MoRF binding (P = 0.0413)
MVP		0.44
MPC		0.18
ClinPred		0.73	D
GERP RS		1.6
Varity_R		0.94
gMVP		0.87
Mutation Taster		=78/22	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: rs1024803591; hg19: chr20-1616179;