2-127427194-T-G

Position:

• chr2-127427194-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1 PM2 BP4_Moderate

The NM_000312.4(PROC):​c.768T>G​(p.Asp256Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000658 in 151,998 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 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 nucleotide change resulting in same amino acid change has been previously reported as Uncertain significancein ClinVar. Synonymous variant affecting the same amino acid position (i.e. D256D) has been classified as Benign.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
• Consequence: PROC NM_000312.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.57

Genes affected

PROC (HGNC:9451): (protein C, inactivator of coagulation factors Va and VIIIa) This gene encodes a vitamin K-dependent plasma glycoprotein. The encoded protein is cleaved to its activated form by the thrombin-thrombomodulin complex. This activated form contains a serine protease domain and functions in degradation of the activated forms of coagulation factors V and VIII. Mutations in this gene have been associated with thrombophilia due to protein C deficiency, neonatal purpura fulminans, and recurrent venous thrombosis.[provided by RefSeq, Dec 2009]

LOC105373608 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 2 uncertain in NM_000312.4
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.0718157).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PROC	NM_000312.4	c.768T>G	p.Asp256Glu	missense_variant	8/9	ENST00000234071.8
LOC105373608	XR_007087228.1	n.2111A>C		non_coding_transcript_exon_variant	2/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PROC	ENST00000234071.8	c.768T>G	p.Asp256Glu	missense_variant	8/9	1	NM_000312.4	P1
PROC	ENST00000409048.1	c.870T>G	p.Asp290Glu	missense_variant	6/7	5
PROC	ENST00000402125.2	c.121-1163T>G		intron_variant		2

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 151998 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000242

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.: 38

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 151998 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 74242

Gnomad4 AFR AF: 0.0000242

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.071
BayesDel_addAF	Benign	-0.087	T
BayesDel_noAF	Benign	-0.36
CADD	Benign	0.072
DANN	Benign	0.73
DEOGEN2	Uncertain	0.48	T;.
Eigen	Benign	-1.5
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.040	N
LIST_S2	Benign	0.083	T;T
M_CAP	Benign	0.085	D
MetaRNN	Benign	0.072	T;T
MetaSVM	Benign	-0.75	T
MutationAssessor	Benign	0.080	N;.
MutationTaster	Benign	1.0	P;P;P;P
PrimateAI	Benign	0.41	T
PROVEAN	Benign	0.69	N;N
REVEL	Benign	0.25
Sift4G	Benign	1.0	T;T
Polyphen		0.0	B;B
Vest4		0.085
MutPred		0.34		.;Gain of sheet (P = 0.0827);
MVP		0.61
MPC		0.41
ClinPred		0.046	T
GERP RS		-2.8
Varity_R		0.28
gMVP		0.79

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: rs5937; hg19: chr2-128184770;