5-129905479-C-A

Variant names:

• chr5-129905479-C-A
• rs1196814206
• NM_175856.5:c.650C>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_175856.5(CHSY3):​c.650C>A​(p.Pro217His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,688 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 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. P217R) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CHSY3 NM_175856.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.78
• Publications: 0 publications found

Genes affected

CHSY3 (HGNC:24293): (chondroitin sulfate synthase 3) CSS3 is a glycosyltransferase that has both glucuronyltransferase and N-acetylgalactosaminyltransferase activities (Yada et al., 2003 [PubMed 12907687]).[supplied by OMIM, Mar 2008]

CHSY3-AS1 (HGNC:58253):

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.16404086).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_175856.5. 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
	CHSY3	NM_175856.5	MANE Select	c.650C>A	p.Pro217His	missense	Exon 1 of 3	NP_787052.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHSY3	ENST00000305031.5	TSL:1 MANE Select	c.650C>A	p.Pro217His	missense	Exon 1 of 3	ENSP00000302629.4	Q70JA7
	CHSY3-AS1	ENST00000503616.5	TSL:3	n.72+367G>T		intron	N/A
	CHSY3-AS1	ENST00000515569.1	TSL:2	n.82+101G>T		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460688 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 726668

African (AFR) AF: 0.0000299 AC: 1 AN: 33474

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

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: 52254

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

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111998

Other (OTH) AF: 0.00 AC: 0 AN: 60384

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.083
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.51
CADD	Benign	22
DANN	Benign	0.93
DEOGEN2	Benign	0.015	T
Eigen	Benign	0.082
Eigen_PC	Benign	0.11
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.40	T
M_CAP	Benign	0.039	D
MetaRNN	Benign	0.16	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.1	L
PhyloP100		1.8
PrimateAI	Benign	0.46	T
PROVEAN	Benign	-0.36	N
REVEL	Benign	0.047
Sift	Benign	0.37	T
Sift4G	Benign	0.56	T
Polyphen		0.85	P
Vest4		0.25
MutPred		0.29		Loss of glycosylation at P217 (P = 0.0125)
MVP		0.59
MPC		1.3
ClinPred		0.29	T
GERP RS		3.4
Varity_R		0.12
gMVP		0.24
Mutation Taster		=80/20	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: rs1196814206; hg19: chr5-129241172;