Genetic Variant CGB7:p.Gly95Arg (chr19-49054506-C-G) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PP3_Strong

The NM_001385261.1(CGB7):c.283G>C(p.Gly95Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a pathogenic 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. G95D) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 19)

Exomes 𝑓: 7.2e-7 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

CGB7
NM_001385261.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.51

Publications

0 publications found

Variant links:

Genes affected

CGB7 (HGNC:16451): (chorionic gonadotropin subunit beta 7) This gene is a member of the glycoprotein hormone beta chain family and encodes the beta 7 subunit of chorionic gonadotropin (CG). Glycoprotein hormones are heterodimers consisting of a common alpha subunit and an unique beta subunit which confers biological specificity. CG is produced by the trophoblastic cells of the placenta and stimulates the ovaries to synthesize the steroids that are essential for the maintenance of pregnancy. The beta subunit of CG is encoded by 6 genes which are arranged in tandem and inverted pairs on chromosome 19q13.3 and contiguous with the luteinizing hormone beta subunit gene. [provided by RefSeq, Jul 2008]

CGB7 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.974

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CGB7	NM_001385261.1 link	c.283G>C	p.Gly95Arg	missense_variant	Exon 5 of 5	ENST00000684222.1	NP_001372190.1
CGB7	NM_033142.2 link	c.283G>C	p.Gly95Arg	missense_variant	Exon 5 of 5		NP_149133.1	P0DN87A0A0F7RQF0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CGB7	ENST00000684222.1 link	c.283G>C	p.Gly95Arg	missense_variant	Exon 5 of 5		NM_001385261.1	ENSP00000507822.1	P0DN87
CGB7	ENST00000596965.5 link	c.283G>C	p.Gly95Arg	missense_variant	Exon 5 of 5	2		ENSP00000469076.1	P0DN87
CGB7	ENST00000597853.5 link	c.283G>C	p.Gly95Arg	missense_variant	Exon 5 of 5	2		ENSP00000470813.1	P0DN87

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

7.24e-7

AC:

AN:

1381156

Hom.:

Cov.:

AF XY:

0.00000146

AC XY:

AN XY:

685762

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32548

American (AMR)

AF:

0.00

AC:

AN:

41520

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25084

East Asian (EAS)

AF:

0.00

AC:

AN:

38412

South Asian (SAS)

AF:

0.00

AC:

AN:

82788

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49678

Middle Eastern (MID)

AF:

0.00

AC:

AN:

3980

European-Non Finnish (NFE)

AF:

9.53e-7

AC:

AN:

1049828

Other (OTH)

AF:

0.00

AC:

AN:

57318

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 02, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.283G>C (p.G95R) alteration is located in exon 3 (coding exon 3) of the CGB7 gene. This alteration results from a G to C substitution at nucleotide position 283, causing the glycine (G) at amino acid position 95 to be replaced by an arginine (R). 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

Uncertain

0.43

BayesDel_addAF

Pathogenic

0.18

BayesDel_noAF

Uncertain

0.020

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.77

D;D;D

Eigen

Benign

0.17

Eigen_PC

Benign

0.0054

FATHMM_MKL

Uncertain

0.88

LIST_S2

Uncertain

0.89

D;.;.

M_CAP

Uncertain

0.26

MetaRNN

Pathogenic

0.97

D;D;D

MetaSVM

Pathogenic

0.81

PhyloP100

3.5

PROVEAN

Pathogenic

-7.1

D;.;.

REVEL

Uncertain

0.64

Sift

Uncertain

0.013

D;.;.

Sift4G

Uncertain

0.011

D;D;D

Vest4

0.73

MVP

0.84

MPC

2.4

ClinPred

0.96

GERP RS

1.8

Varity_R

0.52

gMVP

0.16

Mutation Taster

=84/16

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over