rs75926342

Variant names:

• chr17-7445171-C-A
• rs75926342
• NM_000747.3:c.44C>A

Your query was ambiguous. Multiple possible variants found:

• chr17-7445171-C-A
• chr17-7445171-C-G
• chr17-7445171-C-T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000747.3(CHRNB1):​c.44C>A​(p.Ala15Glu) 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. 14/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A15V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CHRNB1 NM_000747.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.387
• Publications: 2 publications found

Genes affected

CHRNB1 (HGNC:1961): (cholinergic receptor nicotinic beta 1 subunit) The muscle acetylcholine receptor is composed of five subunits: two alpha subunits and one beta, one gamma, and one delta subunit. This gene encodes the beta subunit of the acetylcholine receptor. The acetylcholine receptor changes conformation upon acetylcholine binding leading to the opening of an ion-conducting channel across the plasma membrane. Mutations in this gene are associated with slow-channel congenital myasthenic syndrome. [provided by RefSeq, Jul 2008]

ENSG00000272884 (HGNC:):

FGF11 (HGNC:3667): (fibroblast growth factor 11) The protein encoded by this gene is a member of the fibroblast growth factor (FGF) family. FGF family members possess broad mitogenic and cell survival activities, and are involved in a variety of biological processes, including embryonic development, cell growth, morphogenesis, tissue repair, tumor growth and invasion. The function of this gene has not yet been determined. The expression pattern of the mouse homolog implies a role in nervous system development. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2015]

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.15768269).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000747.3. 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
	CHRNB1	NM_000747.3	MANE Select	c.44C>A	p.Ala15Glu	missense	Exon 1 of 11	NP_000738.2
	FGF11	NM_004112.4	MANE Select	c.*2025C>A		downstream_gene	N/A	NP_004103.1	Q92914
	FGF11	NM_001303460.2		c.*2025C>A		downstream_gene	N/A	NP_001290389.1	B7Z1C3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHRNB1	ENST00000306071.7	TSL:1 MANE Select	c.44C>A	p.Ala15Glu	missense	Exon 1 of 11	ENSP00000304290.2	P11230-1
	ENSG00000272884	ENST00000575331.1	TSL:1	n.4758C>A		non_coding_transcript_exon	Exon 3 of 3
	CHRNB1	ENST00000572857.5	TSL:4	c.44C>A	p.Ala15Glu	missense	Exon 1 of 6	ENSP00000461402.1	I3L4N5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1457028 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 724744

African (AFR) AF: 0.00 AC: 0 AN: 33436

American (AMR) AF: 0.00 AC: 0 AN: 44578

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26066

East Asian (EAS) AF: 0.00 AC: 0 AN: 39660

South Asian (SAS) AF: 0.00 AC: 0 AN: 86074

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50560

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5266

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111240

Other (OTH) AF: 0.00 AC: 0 AN: 60148

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Benign	-0.022	T
BayesDel_noAF	Benign	-0.27
CADD	Benign	14
DANN	Benign	0.93
DEOGEN2	Benign	0.14	T
Eigen	Benign	-0.98
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.22	N
M_CAP	Benign	0.028	D
MetaRNN	Benign	0.16	T
MetaSVM	Benign	-0.88	T
MutationAssessor	Benign	1.6	L
PhyloP100		-0.39
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-1.5	N
REVEL	Uncertain	0.41
Sift	Benign	0.10	T
Sift4G	Benign	0.34	T
Polyphen		0.18	B
Vest4		0.38
MutPred		0.36		Gain of disorder (P = 0.0449)
MVP		0.74
MPC		0.47
ClinPred		0.33	T
GERP RS		-1.0
PromoterAI		-0.038	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.11
gMVP		0.53
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: rs75926342; hg19: chr17-7348490;