chr1-196652167-T-G

Position:

• chr1-196652167-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000186.4(CFH):​c.50T>G​(p.Val17Gly) 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. 12/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V17I) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CFH NM_000186.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.196

Genes affected

CFH (HGNC:4883): (complement factor H) This gene is a member of the Regulator of Complement Activation (RCA) gene cluster and encodes a protein with twenty short consensus repeat (SCR) domains. This protein is secreted into the bloodstream and has an essential role in the regulation of complement activation, restricting this innate defense mechanism to microbial infections. Mutations in this gene have been associated with hemolytic-uremic syndrome (HUS) and chronic hypocomplementemic nephropathy. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. [provided by RefSeq, Oct 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.22315356).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CFH	NM_000186.4	c.50T>G	p.Val17Gly	missense_variant	1/22	ENST00000367429.9
CFH	NM_001014975.3	c.50T>G	p.Val17Gly	missense_variant	1/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CFH	ENST00000367429.9	c.50T>G	p.Val17Gly	missense_variant	1/22	1	NM_000186.4	P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000843 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 23, 2022

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). This missense change has been observed in individual(s) with partial factor H deficiency (PMID: 28637589). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces valine, which is neutral and non-polar, with glycine, which is neutral and non-polar, at codon 17 of the CFH protein (p.Val17Gly). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.091	T
BayesDel_noAF	Benign	-0.37
CADD	Benign	18
DANN	Uncertain	0.99
DEOGEN2	Benign	0.057	.;T;.
Eigen	Benign	-0.19
Eigen_PC	Benign	-0.21
FATHMM_MKL	Benign	0.26	N
LIST_S2	Benign	0.58	T;T;T
M_CAP	Benign	0.016	T
MetaRNN	Benign	0.22	T;T;T
MetaSVM	Benign	-0.93	T
MutationTaster	Benign	0.54	N;N;N
PrimateAI	Benign	0.34	T
PROVEAN	Uncertain	-2.5	N;.;D
REVEL	Benign	0.11
Sift	Uncertain	0.0020	D;.;D
Sift4G	Uncertain	0.0030	D;D;D
Polyphen		0.95	.;.;P
Vest4		0.34
MutPred		0.52		Loss of stability (P = 0.0318);Loss of stability (P = 0.0318);Loss of stability (P = 0.0318);
MVP		0.26
MPC		0.20
ClinPred		0.70	D
GERP RS		0.69
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
gMVP		0.63

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: rs1308826580; hg19: chr1-196621297;