NM_033183.3:c.233A>G

Variant names:

• chr19-49047920-T-C
• rs1414372486
• NM_033183.3:c.233A>G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_033183.3(CGB8):​c.233A>G​(p.Asn78Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 24)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CGB8 NM_033183.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.30

Genes affected

CGB8 (HGNC:16453): (chorionic gonadotropin subunit beta 8) This gene is a member of the glycoprotein hormone beta chain family and encodes the beta 8 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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3029557).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CGB8	NM_033183.3	c.233A>G	p.Asn78Ser	missense_variant	Exon 3 of 3	ENST00000448456.4	NP_149439.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CGB8	ENST00000448456.4	c.233A>G	p.Asn78Ser	missense_variant	Exon 3 of 3	1	NM_033183.3	ENSP00000403649.2

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 1085840 Hom.: 0 Cov.: 14 AF XY: 0.00 AC XY: 0 AN XY: 549304

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 24

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.011	T
BayesDel_noAF	Benign	-0.25
CADD	Benign	12
DANN	Benign	0.94
Eigen	Benign	-0.26
Eigen_PC	Benign	-0.36
FATHMM_MKL	Benign	0.27	N
LIST_S2	Benign	0.77	T
M_CAP	Benign	0.067	D
MetaRNN	Benign	0.30	T
MetaSVM	Uncertain	-0.12	T
PrimateAI	Uncertain	0.74	T
PROVEAN	Benign	0.050	N
REVEL	Benign	0.29
Sift	Benign	0.050	D
Sift4G	Benign	0.092	T
Vest4		0.068
MutPred		0.61		Loss of stability (P = 0.075);
MVP		0.62
MPC		0.010
ClinPred		0.86	D
GERP RS		0.69
gMVP		0.022

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1414372486; hg19: chr19-49551177;