chr6-31723671-A-C

Variant names:

• chr6-31723671-A-C
• rs778675959
• NM_138272.3:c.94A>C

Variant summary

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

The NM_138272.3(MPIG6B):​c.94A>C​(p.Asn32His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000201 in 1,590,382 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000022 (0 hom.)
• Consequence: MPIG6B NM_138272.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.50
• Publications: 0 publications found

Genes affected

MPIG6B (HGNC:13937): (megakaryocyte and platelet inhibitory receptor G6b) This gene is a member of the immunoglobulin (Ig) superfamily and is located in the major histocompatibility complex (MHC) class III region. The protein encoded by this gene is a glycosylated, plasma membrane-bound cell surface receptor, but soluble isoforms encoded by some transcript variants have been found in the endoplasmic reticulum and Golgi before being secreted. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

MPIG6B Gene-Disease associations (from GenCC):

• thrombocytopenia, anemia, and myelofibrosis

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen

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_138272.3. 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
	MPIG6B	NM_138272.3	MANE Select	c.94A>C	p.Asn32His	missense	Exon 2 of 6	NP_612116.1	O95866-1
	MPIG6B	NM_025260.4		c.94A>C	p.Asn32His	missense	Exon 2 of 6	NP_079536.2
	MPIG6B	NM_138277.3		c.94A>C	p.Asn32His	missense	Exon 2 of 5	NP_612121.1	O95866-7

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MPIG6B	ENST00000649779.1	MANE Select	c.94A>C	p.Asn32His	missense	Exon 2 of 6	ENSP00000497720.1	O95866-1
	MPIG6B	ENST00000375809.7	TSL:1	c.94A>C	p.Asn32His	missense	Exon 2 of 6	ENSP00000364967.3	O95866-2
	MPIG6B	ENST00000375810.8	TSL:1	c.94A>C	p.Asn32His	missense	Exon 2 of 5	ENSP00000364968.4	O95866-7

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152138 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000430 AC: 1 AN: 232388 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000938

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000216 AC: 31 AN: 1438244 Hom.: 0 Cov.: 33 AF XY: 0.0000210 AC XY: 15 AN XY: 713712

African (AFR) AF: 0.00 AC: 0 AN: 32784

American (AMR) AF: 0.00 AC: 0 AN: 41610

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24836

East Asian (EAS) AF: 0.00 AC: 0 AN: 39434

South Asian (SAS) AF: 0.00 AC: 0 AN: 84160

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49830

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5634

European-Non Finnish (NFE) AF: 0.0000273 AC: 30 AN: 1100648

Other (OTH) AF: 0.0000169 AC: 1 AN: 59308

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152138 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74330

African (AFR) AF: 0.00 AC: 0 AN: 41426

American (AMR) AF: 0.00 AC: 0 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5174

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

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: 0.0000147 AC: 1 AN: 68020

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

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

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.34
BayesDel_addAF	Benign	-0.020	T
BayesDel_noAF	Benign	-0.27
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.10	T
Eigen	Uncertain	0.43
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Benign	0.74	D
LIST_S2	Uncertain	0.89	D
M_CAP	Benign	0.018	T
MetaRNN	Uncertain	0.54	D
MetaSVM	Benign	-0.77	T
MutationAssessor	Uncertain	2.3	M
PhyloP100		2.5
PROVEAN	Uncertain	-4.3	D
REVEL	Uncertain	0.31
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0080	D
Polyphen		1.0	D
Vest4		0.40
MutPred		0.59		Gain of sheet (P = 0.039)
MVP		0.73
MPC		0.50
ClinPred		0.83	D
GERP RS		4.8
PromoterAI		-0.057	Neutral
Varity_R		0.13
gMVP		0.57
Mutation Taster		=64/36	polymorphism

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs778675959; hg19: chr6-31691448;