1-159713554-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_000567.3(CRP):c.646G>A(p.Val216Met) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: CRP NM_000567.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.05

Genes affected

CRP (HGNC:2367): (C-reactive protein) The protein encoded by this gene belongs to the pentraxin family which also includes serum amyloid P component protein and pentraxin 3. Pentraxins are involved in complement activation and amplification via communication with complement initiation pattern recognition molecules, but also complement regulation via recruitment of complement regulators. The encoded protein has a calcium dependent ligand binding domain with a distinctive flattened beta-jellyroll structure. It exists in two forms as either a pentamer in circulation or as a nonsoluble monomer in tissues. It is involved in several host defense related functions based on its ability to recognize foreign pathogens and damaged cells of the host and to initiate their elimination by interacting with humoral and cellular effector systems in the blood. Consequently, the level of this protein in plasma increases greatly during acute phase response to tissue injury, infection, or other inflammatory stimuli. Elevated expression of the encoded protein is associated with severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) infection. [provided by RefSeq, Aug 2020]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.824

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CRP	NM_000567.3	c.646G>A	p.Val216Met	missense_variant	2/2	ENST00000255030.9
CRP	NM_001329057.2	c.646G>A	p.Val216Met	missense_variant	2/3
CRP	NM_001382703.1	c.280G>A	p.Val94Met	missense_variant	3/3
CRP	NM_001329058.2	c.247G>A	p.Val83Met	missense_variant	3/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CRP	ENST00000255030.9	c.646G>A	p.Val216Met	missense_variant	2/2	1	NM_000567.3	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 26, 2022

The c.646G>A (p.V216M) alteration is located in exon 2 (coding exon 2) of the CRP gene. This alteration results from a G to A substitution at nucleotide position 646, causing the valine (V) at amino acid position 216 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.77
BayesDel_addAF	Benign	-0.032	T
BayesDel_noAF	Benign	-0.28
Cadd	Benign	21
Dann	Uncertain	1.0
DEOGEN2	Benign	0.36	T;T;.;T;T
Eigen	Uncertain	0.56
Eigen_PC	Uncertain	0.38
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.84	T;D;T;.;D
M_CAP	Benign	0.015	T
MetaRNN	Pathogenic	0.82	D;D;D;D;D
MetaSVM	Benign	-0.94	T
MutationAssessor	Pathogenic	3.4	M;.;.;.;.
MutationTaster	Benign	0.98	D;D;N;N;N;N
PrimateAI	Benign	0.43	T
PROVEAN	Uncertain	-2.9	D;D;N;N;N
REVEL	Uncertain	0.31
Sift	Pathogenic	0.0	D;D;D;D;D
Sift4G	Uncertain	0.0020	D;D;D;D;D
Polyphen		1.0	D;.;D;.;.
Vest4		0.57
MutPred		0.87		Loss of sheet (P = 0.0817);.;.;.;.;
MVP		0.37
MPC		0.22
ClinPred		0.99	D
GERP RS		4.2
Varity_R		0.89
gMVP		0.78

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-159683344;