rs370616582

Variant names:

• chr15-78629066-C-G
• rs370616582
• NM_000750.5:c.1239G>C

Your query was ambiguous. Multiple possible variants found:

• chr15-78629066-C-G
• chr15-78629066-C-T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 0P and 3B. BP4_Moderate BS2_Supporting

The NM_000750.5(CHRNB4):​c.1239G>C​(p.Trp413Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000743 in 1,614,022 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000059 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: CHRNB4 NM_000750.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.160
• Publications: 0 publications found

Genes affected

CHRNB4 (HGNC:1964): (cholinergic receptor nicotinic beta 4 subunit) This gene is found within a conserved gene cluster and encodes one of the beta subunits of the nicotinic acetylcholine receptor (nAChRs) superfamily which form ligand-gated ion channels with a central pore that forms a cation channel. Neuronal nAChRs are pentameric structures that can be either homomeric or heteromeric, with heteromeric structures containing both alpha and beta subunits. Each subunit contains an extracellular amino terminus and four transmembrane domains. Nicotine is one of the agonists that binds to the receptor. Variants in this gene have been associated with nicotine dependence and lung cancer. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Sep 2017]

CHRNB4 Gene-Disease associations (from GenCC):

• lung cancer

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ENSG00000259555 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.22436997).
• BS2: High AC in GnomAd4 at 9 AD gene. Variant has AC lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000750.5. 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
	CHRNB4	NM_000750.5	MANE Select	c.1239G>C	p.Trp413Cys	missense	Exon 5 of 6	NP_000741.1	P30926-1
	CHRNB4	NM_001256567.3		c.359+2010G>C		intron	N/A	NP_001243496.1	P30926-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHRNB4	ENST00000261751.8	TSL:1 MANE Select	c.1239G>C	p.Trp413Cys	missense	Exon 5 of 6	ENSP00000261751.3	P30926-1
	CHRNB4	ENST00000412074.6	TSL:1	c.359+2010G>C		intron	N/A	ENSP00000416386.2	P30926-2
	CHRNB4	ENST00000929174.1		c.1239G>C	p.Trp413Cys	missense	Exon 6 of 7	ENSP00000599233.1

Frequencies

GnomAD3 genomes AF: 0.0000592 AC: 9 AN: 152128 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000193

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: 0.000479

GnomAD2 exomes AF: 0.00000795 AC: 2 AN: 251476 AF XY: 0.00000736

Gnomad AFR exome AF: 0.000123

Gnomad AMR exome AF: 0.00

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: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461894 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 727248

African (AFR) AF: 0.0000896 AC: 3 AN: 33480

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: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

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

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112012

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome AF: 0.0000592 AC: 9 AN: 152128 Hom.: 0 Cov.: 32 AF XY: 0.0000538 AC XY: 4 AN XY: 74306

African (AFR) AF: 0.000193 AC: 8 AN: 41420

American (AMR) AF: 0.00 AC: 0 AN: 15274

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5190

South Asian (SAS) AF: 0.00 AC: 0 AN: 4818

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10608

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

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68032

Other (OTH) AF: 0.000479 AC: 1 AN: 2088

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.0000604

ESP6500AA AF: 0.000228 AC: 1

ESP6500EA AF: 0.00 AC: 0

ExAC AF: 0.0000165 AC: 2

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	0.15
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.31
CADD	Benign	11
DANN	Benign	0.94
DEOGEN2	Benign	0.12	T
Eigen	Benign	-0.54
Eigen_PC	Benign	-0.60
FATHMM_MKL	Benign	0.30	N
LIST_S2	Benign	0.34	T
M_CAP	Uncertain	0.16	D
MetaRNN	Benign	0.22	T
MetaSVM	Benign	-0.43	T
MutationAssessor	Benign	0.72	N
PhyloP100		0.16
PrimateAI	Benign	0.34	T
PROVEAN	Benign	0.12	N
REVEL	Uncertain	0.34
Sift	Benign	0.18	T
Sift4G	Benign	0.18	T
Polyphen		0.52	P
Vest4		0.24
MutPred		0.66		Loss of MoRF binding (P = 0.0102)
MVP		0.77
MPC		0.98
ClinPred		0.22	T
GERP RS		2.1
Varity_R		0.089
gMVP		0.59
Mutation Taster		=88/12	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: rs370616582; hg19: chr15-78921408;