19-55014977-T-A

Position:

• chr19-55014977-T-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001083899.2(GP6):​c.968A>T​(p.Lys323Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/19 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. K323T) has been classified as Benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: GP6 NM_001083899.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.191

Genes affected

GP6 (HGNC:14388): (glycoprotein VI platelet) This gene encodes a platelet membrane glycoprotein of the immunoglobulin superfamily. The encoded protein is a receptor for collagen and plays a critical role in collagen-induced platelet aggregation and thrombus formation. The encoded protein forms a complex with the Fc receptor gamma-chain that initiates the platelet activation signaling cascade upon collagen binding. Mutations in this gene are a cause of platelet-type bleeding disorder-11 (BDPLT11). Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Dec 2011]

GP6-AS1 (HGNC:55305): (GP6 antisense RNA 1)

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.062623024).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GP6	NM_001083899.2	c.968A>T	p.Lys323Ile	missense_variant	8/8	ENST00000310373.7
GP6-AS1	XR_001754012.3	n.121+8513T>A		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GP6	ENST00000310373.7	c.968A>T	p.Lys323Ile	missense_variant	8/8	1	NM_001083899.2
GP6-AS1	ENST00000593060.5	n.155+8513T>A		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 56

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.073
BayesDel_addAF	Benign	-0.34	T
BayesDel_noAF	Benign	-0.72
CADD	Benign	13
DANN	Benign	0.94
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.030	N
M_CAP	Benign	0.010	T
MetaRNN	Benign	0.063	T
MetaSVM	Benign	-1.1	T
MutationTaster	Benign	1.0	P;P;P
PrimateAI	Benign	0.38	T
PROVEAN	Benign	0.18	N
REVEL	Benign	0.037
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.010	D
Polyphen		0.0020	B
Vest4		0.23
MutPred		0.38		Loss of ubiquitination at K323 (P = 0.0041);
MVP		0.11
MPC		0.29
ClinPred		0.13	T
GERP RS		2.6
gMVP		0.065

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

Publications

LitVar

Other links and lift over

dbSNP: rs1671152; hg19: chr19-55526345;