rs768957112

Variant names:

• chr1-186301700-T-C
• rs768957112
• NM_005807.6:c.308T>C

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_005807.6(PRG4):​c.308T>C​(p.Phe103Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,613,764 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: PRG4 NM_005807.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.67
• Publications: 1 publications found

Genes affected

PRG4 (HGNC:9364): (proteoglycan 4) The protein encoded by this gene is a large proteoglycan that is synthesized by chondrocytes located at the surface of articular cartilage and by some synovial lining cells. This protein contains both chondroitin sulfate and keratan sulfate glycosaminoglycans. It functions as a boundary lubricant at the cartilage surface and contributes to the elastic absorption and energy dissipation of synovial fluid. Mutations in this gene result in camptodactyly-arthropathy-coxa vara-pericarditis syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2014]

PRG4 Gene-Disease associations (from GenCC):

• camptodactyly-arthropathy-coxa vara-pericarditis syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Illumina, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.40466657).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005807.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRG4	NM_005807.6	MANE Select	c.308T>C	p.Phe103Ser	missense	Exon 4 of 13	NP_005798.3	Q92954-1
	PRG4	NM_001127708.3		c.185T>C	p.Phe62Ser	missense	Exon 3 of 12	NP_001121180.2	Q92954-2
	PRG4	NM_001303232.2		c.308T>C	p.Phe103Ser	missense	Exon 4 of 12	NP_001290161.1	Q92954-6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRG4	ENST00000445192.7	TSL:5 MANE Select	c.308T>C	p.Phe103Ser	missense	Exon 4 of 13	ENSP00000399679.3	Q92954-1
	PRG4	ENST00000367483.8	TSL:5	c.185T>C	p.Phe62Ser	missense	Exon 3 of 12	ENSP00000356453.4	Q92954-2
	PRG4	ENST00000635041.1	TSL:5	c.308T>C	p.Phe103Ser	missense	Exon 4 of 12	ENSP00000489292.1	Q92954-6

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152148 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

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

GnomAD2 exomes AF: 0.00000795 AC: 2 AN: 251490 AF XY: 0.0000147

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000879

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461616 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727112

African (AFR) AF: 0.00 AC: 0 AN: 33474

American (AMR) AF: 0.0000224 AC: 1 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26128

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111780

Other (OTH) AF: 0.00 AC: 0 AN: 60380

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152148 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74322

African (AFR) AF: 0.00 AC: 0 AN: 41424

American (AMR) AF: 0.0000655 AC: 1 AN: 15276

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5192

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10612

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68024

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Camptodactyly-arthropathy-coxa vara-pericarditis syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.53
BayesDel_addAF	Benign	-0.026	T
BayesDel_noAF	Benign	-0.19
CADD	Uncertain	24
DANN	Benign	0.94
DEOGEN2	Benign	0.087	T
Eigen	Uncertain	0.38
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Uncertain	0.77	D
LIST_S2	Benign	0.71	T
M_CAP	Benign	0.043	D
MetaRNN	Benign	0.40	T
MetaSVM	Benign	-0.88	T
MutationAssessor	Uncertain	2.1	M
PhyloP100		2.7
PrimateAI	Benign	0.46	T
PROVEAN	Pathogenic	-6.9	D
REVEL	Benign	0.20
Sift	Benign	0.21	T
Sift4G	Uncertain	0.0020	D
Polyphen		0.98	D
Vest4		0.69
MutPred		0.36		Gain of glycosylation at F103 (P = 0.0043)
MVP		0.33
MPC		0.33
ClinPred		0.91	D
GERP RS		5.6
Varity_R		0.12
gMVP		0.62
Mutation Taster		=87/13	polymorphism

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

Other links and lift over

dbSNP: rs768957112; hg19: chr1-186270832;