Genetic Variant SERPINB12:p.Met243Thr (chr18-63565467-T-C) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_001307928.2(SERPINB12):c.728T>C(p.Met243Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,494 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

SERPINB12
NM_001307928.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.33

Publications

0 publications found

Variant links:

Genes affected

SERPINB12 (HGNC:14220): (serpin family B member 12) Enables serine-type endopeptidase inhibitor activity. Predicted to be involved in negative regulation of endopeptidase activity. Predicted to act upstream of or within hematopoietic progenitor cell differentiation. Part of collagen-containing extracellular matrix. [provided by Alliance of Genome Resources, Apr 2022]

SERPINB12 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.982

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001307928.2. 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
	SERPINB12	NM_001307928.2	MANE Select	c.728T>C	p.Met243Thr	missense	Exon 7 of 8	NP_001294857.1	Q96P63-2
	SERPINB12	NM_080474.2		c.668T>C	p.Met223Thr	missense	Exon 6 of 7	NP_536722.1	Q96P63-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SERPINB12	ENST00000382768.2	TSL:1 MANE Select	c.728T>C	p.Met243Thr	missense	Exon 7 of 8	ENSP00000372218.1	Q96P63-2
SERPINB12	ENST00000269491.6	TSL:1	c.668T>C	p.Met223Thr	missense	Exon 7 of 8	ENSP00000269491.1	Q96P63-1
SERPINB12	ENST00000680447.1		n.465T>C		non_coding_transcript_exon	Exon 3 of 4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461494

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727036

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33470

American (AMR)

AF:

0.00

AC:

AN:

44670

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26128

East Asian (EAS)

AF:

0.00

AC:

AN:

39686

South Asian (SAS)

AF:

0.00

AC:

AN:

86146

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111832

Other (OTH)

AF:

0.00

AC:

AN:

60378

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.71

BayesDel_addAF

Pathogenic

0.43

BayesDel_noAF

Pathogenic

0.38

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.37

Eigen

Uncertain

0.67

Eigen_PC

Uncertain

0.59

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.65

M_CAP

Uncertain

0.092

MetaRNN

Pathogenic

0.98

MetaSVM

Pathogenic

0.81

MutationAssessor

Uncertain

2.9

PhyloP100

7.3

PrimateAI

Uncertain

0.70

PROVEAN

Pathogenic

-5.8

REVEL

Pathogenic

0.91

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.95

MutPred

0.92

Gain of methylation at K242 (P = 0.028)

MVP

0.94

MPC

0.29

ClinPred

1.0

GERP RS

5.3

Varity_R

0.90

gMVP

0.73

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over