rs863224872

chr12-4372649-C-T

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1 PM2 PP3_Strong PP5_Moderate

The NM_020638.3(FGF23):c.260G>A(p.Gly87Asp) 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 Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G87A) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: FGF23 NM_020638.3 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 5.24

Genes affected

FGF23 (HGNC:3680): (fibroblast growth factor 23) This gene encodes a member of the fibroblast growth factor family of proteins, which possess broad mitogenic and cell survival activities and are involved in a variety of biological processes. The product of this gene regulates phosphate homeostasis and transport in the kidney. The full-length, functional protein may be deactivated via cleavage into N-terminal and C-terminal chains. Mutation of this cleavage site causes autosomal dominant hypophosphatemic rickets (ADHR). Mutations in this gene are also associated with hyperphosphatemic familial tumoral calcinosis (HFTC). [provided by RefSeq, Feb 2013]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PM1: In a chain Fibroblast growth factor 23 N-terminal peptide (size 154) in uniprot entity FGF23_HUMAN there are 18 pathogenic changes around while only 1 benign (95%) in NM_020638.3
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.977
• PP5: Variant 12-4372649-C-T is Pathogenic according to our data. Variant chr12-4372649-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 216929.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FGF23	NM_020638.3	c.260G>A	p.Gly87Asp	missense_variant	2/3	ENST00000237837.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FGF23	ENST00000237837.2	c.260G>A	p.Gly87Asp	missense_variant	2/3	1	NM_020638.3	P1
FGF23	ENST00000648269.1	n.1760G>A		non_coding_transcript_exon_variant	1/2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 31

Bravo AF: 0.00000378

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Familial hyperphosphatemic tumoral calcinosis/hyperphosphatemic hyperostosis syndrome Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

UCLA Clinical Genomics Center, UCLA

Jul 01, 2014

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.41	D
BayesDel_noAF	Pathogenic	0.34
Cadd	Pathogenic	28
Dann	Uncertain	1.0
DEOGEN2	Pathogenic	0.95	D
Eigen	Pathogenic	0.80
Eigen_PC	Pathogenic	0.71
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Benign	0.82	T
M_CAP	Uncertain	0.16	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	0.93	D
MutationAssessor	Pathogenic	3.3	M
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.70	T
PROVEAN	Pathogenic	-6.3	D
REVEL	Pathogenic	0.89
Sift	Benign	0.13	T
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.92
MutPred		0.87		Loss of catalytic residue at V88 (P = 0.0616);
MVP		0.97
MPC		1.2
ClinPred		1.0	D
GERP RS		4.8
Varity_R		0.95
gMVP		0.96

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: rs863224872; hg19: chr12-4481815;