Genetic Variant CHPF:p.Ser741Gly (chr2-219539490-T-C) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_024536.6(CHPF):c.2221A>G(p.Ser741Gly) variant causes a missense change. The variant allele was found at a frequency of 0.0000124 in 1,613,570 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 0.000079 ( 0 hom., cov: 34)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

CHPF
NM_024536.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.25

Variant links:

Genes affected

CHPF (HGNC:24291): (chondroitin polymerizing factor) Enables N-acetylgalactosaminyl-proteoglycan 3-beta-glucuronosyltransferase activity and glucuronosyl-N-acetylgalactosaminyl-proteoglycan 4-beta-N-acetylgalactosaminyltransferase activity. Involved in chondroitin sulfate biosynthetic process. Predicted to be located in Golgi membrane. [provided by Alliance of Genome Resources, Apr 2022]

CHPF links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.20894071).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHPF	NM_024536.6 link	c.2221A>G	p.Ser741Gly	missense_variant	Exon 4 of 4	ENST00000243776.11	NP_078812.3	Q8IZ52-1
CHPF	NM_001195731.2 link	c.1735A>G	p.Ser579Gly	missense_variant	Exon 4 of 4		NP_001182660.2	Q8IZ52-4
CHPF	XM_011511838.4 link	c.1348A>G	p.Ser450Gly	missense_variant	Exon 3 of 3		XP_011510140.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHPF	ENST00000243776.11 link	c.2221A>G	p.Ser741Gly	missense_variant	Exon 4 of 4	1	NM_024536.6	ENSP00000243776.6		Q8IZ52-1

Frequencies

GnomAD3 genomes

AF:

0.0000788

AC:

AN:

152244

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000723

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

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

GnomAD3 exomes

AF:

0.0000160

AC:

AN:

250150

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

135470

show subpopulations

Gnomad AFR exome

AF:

0.000124

Gnomad AMR exome

AF:

0.0000579

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000547

AC:

AN:

1461326

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727000

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000788

AC:

AN:

152244

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74378

show subpopulations

Gnomad4 AFR

AF:

0.0000723

Gnomad4 AMR

AF:

0.000589

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000907

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jun 16, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2221A>G (p.S741G) alteration is located in exon 4 (coding exon 4) of the CHPF gene. This alteration results from a A to G substitution at nucleotide position 2221, causing the serine (S) at amino acid position 741 to be replaced by a glycine (G). 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

Benign

0.095

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.40

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.16

T;.

Eigen

Benign

-0.18

Eigen_PC

Benign

-0.083

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.81

T;T

M_CAP

Benign

0.010

MetaRNN

Benign

0.21

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.0

M;.

PrimateAI

Uncertain

0.54

PROVEAN

Benign

-1.5

N;N

REVEL

Benign

0.15

Sift

Benign

0.20

T;T

Sift4G

Benign

0.18

T;T

Polyphen

0.017

B;.

Vest4

0.16

MutPred

0.70

Loss of phosphorylation at S741 (P = 0.0536);.;

MVP

0.35

MPC

0.22

ClinPred

0.094

GERP RS

3.4

Varity_R

0.076

gMVP

0.55

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over