rs115129687

chr3-165829857-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP5 BP4

The NM_000055.4(BCHE):c.1177G>C(p.Gly393Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000726 in 1,612,598 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G393V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000053 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000075 (0 hom.)
• Consequence: BCHE NM_000055.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2 U:1
• Conservation: PhyloP100: 2.16

Genes affected

BCHE (HGNC:983): (butyrylcholinesterase) This gene encodes a cholinesterase enzyme and member of the type-B carboxylesterase/lipase family of proteins. The encoded enzyme exhibits broad substrate specificity and is involved in the detoxification of poisons including organophosphate nerve agents and pesticides, and the metabolism of drugs including cocaine, heroin and aspirin. Humans homozygous for certain mutations in this gene exhibit prolonged apnea after administration of the muscle relaxant succinylcholine. [provided by RefSeq, Jul 2016]

LINC01322 (HGNC:50528): (long intergenic non-protein coding RNA 1322)

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 3-165829857-C-G is Pathogenic according to our data. Variant chr3-165829857-C-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 225301.We mark this variant Likely_pathogenic, oryginal submissions are: {Pathogenic=2, Uncertain_significance=1}.
• BP4: Computational evidence support a benign effect (MetaRNN=0.3460163).. Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BCHE	NM_000055.4	c.1177G>C	p.Gly393Arg	missense_variant	2/4	ENST00000264381.8
BCHE	NR_137636.2	n.1295G>C		non_coding_transcript_exon_variant	2/5
BCHE	NR_137635.2	n.110+7457G>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BCHE	ENST00000264381.8	c.1177G>C	p.Gly393Arg	missense_variant	2/4	1	NM_000055.4	P1
LINC01322	ENST00000651449.1	n.1008-16035C>G		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes AF: 0.0000526 AC: 8 AN: 152056 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00135

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

GnomAD3 exomes AF: 0.000116 AC: 29 AN: 249686 Hom.: 0 AF XY: 0.000126 AC XY: 17 AN XY: 134928

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00131

Gnomad SAS exome AF: 0.000131

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000886

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000746 AC: 109 AN: 1460424 Hom.: 0 Cov.: 31 AF XY: 0.0000771 AC XY: 56 AN XY: 726430

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00222

Gnomad4 SAS exome AF: 0.0000929

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000630

Gnomad4 OTH exome AF: 0.0000829

GnomAD4 genome AF: 0.0000526 AC: 8 AN: 152174 Hom.: 0 Cov.: 32 AF XY: 0.0000672 AC XY: 5 AN XY: 74412

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00135

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000434 Hom.: 0

Bravo AF: 0.0000416

ExAC AF: 0.000132 AC: 16

Asia WGS AF: 0.00115 AC: 4 AN: 3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2 Uncertain:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Deficiency of butyrylcholinesterase Pathogenic:2 Uncertain:1

Pathogenic, criteria provided, single submitter	clinical testing	Counsyl	Jun 16, 2017	- -
Uncertain significance, criteria provided, single submitter	reference population	Soonchunhyang University Bucheon Hospital, Soonchunhyang University Medical Center	Mar 18, 2016	- -
Pathogenic, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Apr 24, 2022	Variant summary: BCHE c.1177G>C (p.Gly393Arg) results in a non-conservative amino acid change located in the Carboxylesterase, type B domain (IPR002018) of the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.00012 in 249686 control chromosomes, predominantly at a frequency of 0.0013 within the East Asian subpopulation in the gnomAD database. This frequency is not significantly higher than estimated for a pathogenic variant in BCHE causing Deficiency Of Butyrylcholine Esterase (0.00012 vs 0.016), allowing no conclusion about variant significance. c.1177G>C has been reported in the literature as BCHE*365R (p.Gly365Arg) or silent allele in homozygous and compound heterozygous genotypes among multiple Japanese individuals affected with Deficiency Of Butyrylcholine Esterase (example, Hada_1992, Sakamoto_2001, Maekawa_1997). These data indicate that the variant is very likely to be associated with disease. At least two publications report experimental evidence evaluating an impact on protein function (example, Hada_1992, Sakamoto_2001). The most pronounced variant effect results in absence of normal serum Butyrylcholine Esterase enzyme activity. Two clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. One laboratory classified the variant as pathogenic and one laboratory classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.58
BayesDel_addAF	Benign	-0.013	T
BayesDel_noAF	Pathogenic	0.18
Cadd	Uncertain	26
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.57	D
Eigen	Uncertain	0.46
Eigen_PC	Uncertain	0.44
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.97	D
M_CAP	Uncertain	0.15	D
MetaRNN	Benign	0.35	T
MetaSVM	Pathogenic	0.91	D
MutationAssessor	Benign	1.8	L
MutationTaster	Benign	1.0	D;N
PrimateAI	Benign	0.39	T
PROVEAN	Uncertain	-3.2	D
REVEL	Pathogenic	0.65
Sift	Uncertain	0.0020	D
Sift4G	Benign	0.13	T
Polyphen		0.98	D
Vest4		0.79
MutPred		0.60		Gain of solvent accessibility (P = 0.0584);
MVP		1.0
MPC		0.11
ClinPred		0.19	T
GERP RS		5.5
Varity_R		0.89
gMVP		0.80

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: rs115129687; hg19: chr3-165547645;