NM_033377.2:c.124C>G

Variant names:

• chr19-49036189-G-C
• rs755513430
• NM_033377.2:c.124C>G

Variant summary

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

The NM_033377.2(CGB1):​c.124C>G​(p.Pro42Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 28)
  • Exomes 𝑓: 0.000012 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CGB1 NM_033377.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.14
• Publications: 0 publications found

Genes affected

CGB1 (HGNC:16721): (chorionic gonadotropin subunit beta 1) The beta subunit of chorionic gonadotropin (CGB) is encoded by six highly homologous and structurally similar genes that are arranged in tandem and inverted pairs on chromosome 19q13.3, and contiguous with the luteinizing hormone beta (LHB) subunit gene. The CGB genes are primarily distinguished by differences in the 5' untranscribed region. This gene was originally thought to be one of the two pseudogenes (CGB1 and CGB2) of CGB subunit, however, detection of CGB1 and CGB2 transcripts in vivo, and their presence on the polysomes, suggested that these transcripts are translated. To date, a protein product corresponding to CGB1 has not been isolated. The deduced sequence of the hypothetical protein of 132 aa does not share any similarity with that of functional CGB subunits (PMID:8954017). However, a 155 aa protein, translated from a different frame, is about the same size, and shares 98% identity with other CGB subunits. [provided by RefSeq, Jul 2008]

ENSG00000267335 (HGNC:):

ACMG classification

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_033377.2. 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
	CGB1	NM_033377.2	MANE Select	c.124C>G	p.Pro42Ala	missense	Exon 2 of 3	NP_203695.2	A6NKQ9-2
	CGB1	NM_001382421.1		c.88C>G	p.Pro30Ala	missense	Exon 2 of 3	NP_001369350.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CGB1	ENST00000301407.8	TSL:1 MANE Select	c.124C>G	p.Pro42Ala	missense	Exon 2 of 3	ENSP00000301407.6	A6NKQ9-2
	ENSG00000267335	ENST00000591656.1	TSL:2	c.-28+337C>G		intron	N/A	ENSP00000466140.1	K7ELM3
	ENSG00000267335	ENST00000604577.1	TSL:1	c.9+514C>G		intron	N/A	ENSP00000474022.1	S4R385

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 151982 Hom.: 0 Cov.: 28

Gnomad AFR AF: 0.0000242

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.0000514 AC: 12 AN: 233688 AF XY: 0.0000623

Gnomad AFR exome AF: 0.0000679

Gnomad AMR exome AF: 0.000267

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.000341

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.0000123 AC: 18 AN: 1457948 Hom.: 0 Cov.: 32 AF XY: 0.0000138 AC XY: 10 AN XY: 725376

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.0000299 AC: 1 AN: 33420

American (AMR) AF: 0.000201 AC: 9 AN: 44710

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26122

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86164

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51310

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4492

European-Non Finnish (NFE) AF: 0.00000540 AC: 6 AN: 1111814

Other (OTH) AF: 0.0000332 AC: 2 AN: 60216

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000000908488), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Data not reliable, filtered out with message: AS_VQSR AF: 0.00000658 AC: 1 AN: 151982 Hom.: 0 Cov.: 28 AF XY: 0.0000135 AC XY: 1 AN XY: 74188

African (AFR) AF: 0.0000242 AC: 1 AN: 41336

American (AMR) AF: 0.00 AC: 0 AN: 15268

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5180

South Asian (SAS) AF: 0.00 AC: 0 AN: 4822

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10600

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

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67990

Other (OTH) AF: 0.00 AC: 0 AN: 2088

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000151

ExAC AF: 0.0000662 AC: 8

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.34
CADD	Benign	21
DANN	Uncertain	0.98
Eigen	Benign	-0.088
Eigen_PC	Benign	-0.20
FATHMM_MKL	Uncertain	0.79	D
LIST_S2	Uncertain	0.86	D
M_CAP	Benign	0.022	T
MetaRNN	Uncertain	0.52	D
MetaSVM	Benign	-0.78	T
PhyloP100		1.1
PrimateAI	Uncertain	0.70	T
PROVEAN	Pathogenic	-7.2	D
REVEL	Benign	0.24
Sift	Benign	0.052	T
Sift4G	Benign	0.24	T
Polyphen		0.83	P
Vest4		0.39
MutPred		0.64		Loss of methylation at K38 (P = 0.0889)
MVP		0.44
MPC		1.8
ClinPred		0.27	T
GERP RS		1.8
gMVP		0.13
Mutation Taster		=95/5	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: rs755513430; hg19: chr19-49539446;