chr15-78590180-G-A

Variant names:

• chr15-78590180-G-A
• rs145794252
• NM_000745.4:c.789G>A

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_000745.4(CHRNA5):​c.789G>A​(p.Gly263Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000041 in 1,461,740 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. G263G) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (1 hom.)
• Consequence: CHRNA5 NM_000745.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0410
• Publications: 0 publications found

Genes affected

CHRNA5 (HGNC:1959): (cholinergic receptor nicotinic alpha 5 subunit) The protein encoded by this gene is a nicotinic acetylcholine receptor subunit and a member of a superfamily of ligand-gated ion channels that mediate fast signal transmission at synapses. These receptors are thought to be heteropentamers composed of separate but similar subunits. Defects in this gene have been linked to susceptibility to lung cancer type 2 (LNCR2).[provided by RefSeq, Jun 2010]

ENSG00000261762 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.42).
• BP7: Synonymous conserved (PhyloP=-0.041 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000745.4. 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
	CHRNA5	NM_000745.4	MANE Select	c.789G>A	p.Gly263Gly	synonymous	Exon 5 of 6	NP_000736.2
	CHRNA5	NM_001395171.1		c.789G>A	p.Gly263Gly	synonymous	Exon 5 of 6	NP_001382100.1
	CHRNA5	NM_001395172.1		c.591+198G>A		intron	N/A	NP_001382101.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHRNA5	ENST00000299565.9	TSL:1 MANE Select	c.789G>A	p.Gly263Gly	synonymous	Exon 5 of 6	ENSP00000299565.5	P30532
	CHRNA5	ENST00000913028.1		c.591+198G>A		intron	N/A	ENSP00000583087.1
	CHRNA5	ENST00000394802.4	TSL:3	c.521+82G>A		intron	N/A	ENSP00000378281.4	H7BYM0

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000410 AC: 6 AN: 1461740 Hom.: 1 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 727190

African (AFR) AF: 0.00 AC: 0 AN: 33466

American (AMR) AF: 0.00 AC: 0 AN: 44712

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.0000464 AC: 4 AN: 86252

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53324

Middle Eastern (MID) AF: 0.000347 AC: 2 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111990

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

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.42
CADD	Benign	12
DANN	Benign	0.72
PhyloP100		-0.041
PromoterAI		-0.016	Neutral

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: rs145794252; hg19: chr15-78882522;