Genetic Variant SERPINB2:p.Arg138Leu (chr18-63897215-G-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_002575.3(SERPINB2):c.413G>T(p.Arg138Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000206 in 1,454,836 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

SERPINB2
NM_002575.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.391

Publications

0 publications found

Variant links:

Genes affected

SERPINB2 (HGNC:8584): (serpin family B member 2) Predicted to enable serine-type endopeptidase inhibitor activity. Predicted to be involved in negative regulation of endopeptidase activity. Predicted to be located in extracellular region and plasma membrane. Predicted to be active in extracellular space. [provided by Alliance of Genome Resources, Apr 2022]

SERPINB2 links:

ENSG00000289724 (HGNC:):

ENSG00000289724 links:

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ACMG classification

Classification was made for transcript

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=0.028203428).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SERPINB2	NM_002575.3 link	c.413G>T	p.Arg138Leu	missense_variant	Exon 4 of 8	ENST00000299502.9	NP_002566.1	P05120
SERPINB2	NM_001143818.2 link	c.413G>T	p.Arg138Leu	missense_variant	Exon 5 of 9		NP_001137290.1	P05120
SERPINB2	XM_024451192.2 link	c.413G>T	p.Arg138Leu	missense_variant	Exon 4 of 8		XP_024306960.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SERPINB2	ENST00000299502.9 link	c.413G>T	p.Arg138Leu	missense_variant	Exon 4 of 8	1	NM_002575.3	ENSP00000299502.4		P05120
ENSG00000289724	ENST00000418725.1 link	c.41G>T	p.Arg14Leu	missense_variant	Exon 1 of 7	5		ENSP00000392381.1		H7C004

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000206

AC:

AN:

1454836

Hom.:

Cov.:

AF XY:

0.00000276

AC XY:

AN XY:

723648

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33042

American (AMR)

AF:

0.00

AC:

AN:

43076

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25918

East Asian (EAS)

AF:

0.00

AC:

AN:

39476

South Asian (SAS)

AF:

0.00

AC:

AN:

84922

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53314

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5734

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1109286

Other (OTH)

AF:

0.00

AC:

AN:

60068

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

EpiCase

AF:

0.0000547

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 29, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.413G>T (p.R138L) alteration is located in exon 5 (coding exon 3) of the SERPINB2 gene. This alteration results from a G to T substitution at nucleotide position 413, causing the arginine (R) at amino acid position 138 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.055

BayesDel_noAF

Benign

-0.32

CADD

Benign

9.3

(source)

DANN

Benign

0.83

DEOGEN2

Benign

0.093

T;T;T

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.14

LIST_S2

Benign

0.66

.;T;T

M_CAP

Benign

0.021

MetaRNN

Benign

0.028

T;T;T

MetaSVM

Benign

-0.91

MutationAssessor

Benign

-0.79

N;N;.

PhyloP100

-0.39

PrimateAI

Benign

0.28

PROVEAN

Benign

0.98

N;N;N

REVEL

Benign

0.22

Sift

Benign

1.0

T;T;T

Sift4G

Benign

1.0

T;T;T

Polyphen

0.0050

B;B;.

Vest4

0.11

MutPred

0.56

Loss of disorder (P = 0.066);Loss of disorder (P = 0.066);Loss of disorder (P = 0.066);

MVP

0.14

MPC

0.024

ClinPred

0.054

GERP RS

-2.3

PromoterAI

-0.062

Neutral

(source)

Varity_R

0.15

gMVP

0.37

Mutation Taster

=98/2

polymorphism

(source)

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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chr18-63897215-G-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over