Genetic Variant BPIFB4:p.Pro73Arg (chr20-33083415-C-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_182519.3(BPIFB4):c.218C>G(p.Pro73Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,576 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. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P73Q) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

BPIFB4
NM_182519.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.265

Publications

0 publications found

Variant links:

Genes affected

BPIFB4 (HGNC:16179): (BPI fold containing family B member 4) Predicted to enable lipid binding activity. Predicted to be located in cytoplasm and extracellular region. [provided by Alliance of Genome Resources, Apr 2022]

BPIFB4 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.08654046).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BPIFB4	NM_182519.3 link	c.218C>G	p.Pro73Arg	missense_variant	Exon 5 of 18	ENST00000375483.4	NP_872325.2	P59827-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
BPIFB4	ENST00000375483.4 link	c.218C>G	p.Pro73Arg	missense_variant	Exon 5 of 18	5	NM_182519.3	ENSP00000364632.3	P59827-1
BPIFB4	ENST00000674031.1 link	c.584C>G	p.Pro195Arg	missense_variant	Exon 2 of 15			ENSP00000501266.1	A0A669KBJ0
BPIFB4	ENST00000445356.1 link	n.106+1783C>G		intron_variant	Intron 3 of 6	2		ENSP00000388423.1	F8WEG9

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000796

AC:

AN:

251384

AF XY:

0.0000147

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000342

AC:

AN:

1461576

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727120

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33474

American (AMR)

AF:

0.0000224

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26124

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.0000232

AC:

AN:

86248

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111738

Other (OTH)

AF:

0.00

AC:

AN:

60388

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.515

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 07, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.218C>G (p.P73R) alteration is located in exon 3 (coding exon 3) of the BPIFB4 gene. This alteration results from a C to G substitution at nucleotide position 218, causing the proline (P) at amino acid position 73 to be replaced by an arginine (R). 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

0.085

BayesDel_addAF

Benign

-0.24

BayesDel_noAF

Benign

-0.50

CADD

Benign

(source)

DANN

Benign

0.80

DEOGEN2

Benign

0.0048

Eigen

Benign

-0.92

Eigen_PC

Benign

-0.96

FATHMM_MKL

Benign

0.069

LIST_S2

Benign

0.55

M_CAP

Benign

0.0030

MetaRNN

Benign

0.087

MetaSVM

Benign

-0.91

MutationAssessor

Benign

0.90

PhyloP100

0.27

PrimateAI

Benign

0.44

PROVEAN

Benign

-0.94

REVEL

Benign

0.056

Sift

Uncertain

0.0070

Sift4G

Pathogenic

0.0

Polyphen

0.0030

Vest4

0.27

MutPred

0.39

Gain of sheet (P = 0.0125);

MVP

0.076

MPC

0.059

ClinPred

0.078

GERP RS

1.9

Varity_R

0.052

gMVP

0.30

Mutation Taster

=95/5

polymorphism

(source)

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

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chr20-33083415-C-G

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