chr3-186677783-A-C

Position:

• chr3-186677783-A-C

Variant summary

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

The NM_000412.5(HRG):​c.1478A>C​(p.Asn493Thr) 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. 13/21 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 variant affecting the same amino acid position, but resulting in a different missense (i.e. N493I) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: HRG NM_000412.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.92

Genes affected

HRG (HGNC:5181): (histidine rich glycoprotein) This histidine-rich glycoprotein contains two cystatin-like domains and is located in plasma and platelets. The physiological function has not been determined but it is known that the protein binds heme, dyes and divalent metal ions. The encoded protein also has a peptide that displays antimicrobial activity against C. albicans, E. coli, S. aureus, P. aeruginosa, and E. faecalis. It can inhibit rosette formation and interacts with heparin, thrombospondin and plasminogen. Two of the protein's effects, the inhibition of fibrinolysis and the reduction of inhibition of coagulation, indicate a potential prothrombotic effect. Mutations in this gene lead to thrombophilia due to abnormal histidine-rich glycoprotein levels. [provided by RefSeq, Nov 2014]

HRG-AS1 (HGNC:55915): (HRG and FETUB 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=0.052113116).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HRG	NM_000412.5	c.1478A>C	p.Asn493Thr	missense_variant	7/7	ENST00000232003.5	NP_000403.1
HRG	XM_005247415.5	c.1502A>C	p.Asn501Thr	missense_variant	7/7		XP_005247472.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HRG	ENST00000232003.5	c.1478A>C	p.Asn493Thr	missense_variant	7/7	1	NM_000412.5	ENSP00000232003.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 52

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.091
BayesDel_addAF	Benign	-0.36	T
BayesDel_noAF	Benign	-0.75
CADD	Benign	17
DANN	Uncertain	0.98
DEOGEN2	Benign	0.052	T
Eigen	Benign	-0.83
Eigen_PC	Benign	-0.66
FATHMM_MKL	Benign	0.38	N
LIST_S2	Benign	0.27	T
M_CAP	Benign	0.0038	T
MetaRNN	Benign	0.052	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.0	N
PrimateAI	Uncertain	0.51	T
PROVEAN	Benign	0.87	N
REVEL	Benign	0.068
Sift	Uncertain	0.0050	D
Sift4G	Benign	0.22	T
Polyphen		0.0010	B
Vest4		0.11
MutPred		0.10		Gain of glycosylation at N493 (P = 0.0186);
MVP		0.31
MPC		0.082
ClinPred		0.23	T
GERP RS		4.6
Varity_R		0.070
gMVP		0.16

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: rs1042464; hg19: chr3-186395572;