chr17-1766983-C-A

Position:

• chr17-1766983-C-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_002615.7(SERPINF1):​c.73C>A​(p.Pro25Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000356 in 1,402,928 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 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: 0.0000036 (0 hom.)
• Consequence: SERPINF1 NM_002615.7 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.506

Genes affected

SERPINF1 (HGNC:8824): (serpin family F member 1) This gene encodes a member of the serpin family that does not display the serine protease inhibitory activity shown by many of the other serpin proteins. The encoded protein is secreted and strongly inhibits angiogenesis. In addition, this protein is a neurotrophic factor involved in neuronal differentiation in retinoblastoma cells. Mutations in this gene were found in individuals with osteogenesis imperfecta, type VI. [provided by RefSeq, Aug 2016]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.05766478).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SERPINF1	NM_002615.7	c.73C>A	p.Pro25Thr	missense_variant	2/8	ENST00000254722.9	NP_002606.3
SERPINF1	NM_001329903.2	c.73C>A	p.Pro25Thr	missense_variant	2/8		NP_001316832.1
SERPINF1	NM_001329904.2	c.-477-2869C>A		intron_variant			NP_001316833.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SERPINF1	ENST00000254722.9	c.73C>A	p.Pro25Thr	missense_variant	2/8	1	NM_002615.7	ENSP00000254722	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000356 AC: 5 AN: 1402928 Hom.: 0 Cov.: 30 AF XY: 0.00000578 AC XY: 4 AN XY: 692336

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000126

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000370

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 20, 2023

The c.73C>A (p.P25T) alteration is located in exon 2 (coding exon 1) of the SERPINF1 gene. This alteration results from a C to A substitution at nucleotide position 73, causing the proline (P) at amino acid position 25 to be replaced by a threonine (T). 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	0.052
BayesDel_addAF	Benign	-0.10	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	0.020
DANN	Benign	0.54
DEOGEN2	Benign	0.041	T;T;T;T;.
Eigen	Benign	-1.8
Eigen_PC	Benign	-1.9
FATHMM_MKL	Benign	0.00088	N
LIST_S2	Benign	0.35	T;T;T;T;T
M_CAP	Benign	0.056	D
MetaRNN	Benign	0.058	T;T;T;T;T
MetaSVM	Benign	-0.78	T
MutationAssessor	Benign	0.0	N;.;.;.;.
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.31	T
PROVEAN	Benign	0.080	N;.;.;.;.
REVEL	Benign	0.23
Sift	Benign	0.76	T;.;.;.;.
Sift4G	Benign	1.0	T;T;T;T;T
Polyphen		0.0	B;.;.;.;.
Vest4		0.11
MutPred		0.29		Loss of catalytic residue at P25 (P = 4e-04);Loss of catalytic residue at P25 (P = 4e-04);Loss of catalytic residue at P25 (P = 4e-04);Loss of catalytic residue at P25 (P = 4e-04);Loss of catalytic residue at P25 (P = 4e-04);
MVP		0.60
MPC		0.073
ClinPred		0.013	T
GERP RS		-5.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.041
gMVP		0.31

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

LitVar

Other links and lift over

dbSNP: rs1413487897; hg19: chr17-1670277;