10-100042522-C-G

Variant names:

• chr10-100042522-C-G
• rs147639368
• NM_001308.3:c.1282G>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001308.3(CPN1):​c.1282G>C​(p.Ala428Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,854 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 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. A428S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CPN1 NM_001308.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.176
• Publications: 0 publications found

Genes affected

CPN1 (HGNC:2312): (carboxypeptidase N subunit 1) Carboxypeptidase N is a plasma metallo-protease that cleaves basic amino acids from the C terminal of peptides and proteins. The enzyme is important in the regulation of peptides like kinins and anaphylatoxins, and has also been known as kininase-1 and anaphylatoxin inactivator. This enzyme is a tetramer comprised of two identical regulatory subunits and two identical catalytic subunits; this gene encodes the catalytic subunit. Mutations in this gene can be associated with angioedema or chronic urticaria resulting from carboxypeptidase N deficiency. [provided by RefSeq, Jul 2008]

CPN1 Gene-Disease associations (from GenCC):

• carboxypeptidase N deficiency

  Inheritance: AR Classification: LIMITED Submitted by: Illumina, G2P

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.04780516).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001308.3. 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
	CPN1	NM_001308.3	MANE Select	c.1282G>C	p.Ala428Pro	missense	Exon 9 of 9	NP_001299.1	P15169

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CPN1	ENST00000370418.8	TSL:1 MANE Select	c.1282G>C	p.Ala428Pro	missense	Exon 9 of 9	ENSP00000359446.3	P15169
	CPN1	ENST00000877015.1		c.1303G>C	p.Ala435Pro	missense	Exon 9 of 9	ENSP00000547074.1
	CPN1	ENST00000877014.1		c.1270G>C	p.Ala424Pro	missense	Exon 9 of 9	ENSP00000547073.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461854 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727234

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

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

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

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 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
AlphaMissense	Benign	0.072
BayesDel_addAF	Benign	-0.34	T
BayesDel_noAF	Benign	-0.73
CADD	Benign	9.0
DANN	Benign	0.84
DEOGEN2	Benign	0.30	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.031	N
LIST_S2	Benign	0.33	T
M_CAP	Benign	0.0066	T
MetaRNN	Benign	0.048	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.34	N
PhyloP100		-0.18
PrimateAI	Benign	0.29	T
PROVEAN	Benign	-0.61	N
REVEL	Benign	0.085
Sift	Benign	0.27	T
Sift4G	Benign	0.27	T
Polyphen		0.0010	B
Vest4		0.063
MutPred		0.34		Gain of glycosylation at A428 (P = 0.0051)
MVP		0.12
MPC		0.52
ClinPred		0.21	T
GERP RS		-0.28
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.12
gMVP		0.59
Mutation Taster		=92/8	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: rs147639368; hg19: chr10-101802279;