chr9-76071897-T-C

Position:

• chr9-76071897-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001372043.1(PCSK5):​c.893T>C​(p.Met298Thr) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,162 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: PCSK5 NM_001372043.1 missense, splice_region
• Scores: Splicing: ADA: 0.01664
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.545

Genes affected

PCSK5 (HGNC:8747): (proprotein convertase subtilisin/kexin type 5) This gene encodes a member of the subtilisin-like proprotein convertase family, which includes proteases that process protein and peptide precursors trafficking through regulated or constitutive branches of the secretory pathway. The encoded protein undergoes an initial autocatalytic processing event in the ER to generate a heterodimer which exits the ER. It then sorts to the trans-Golgi network where a second autocatalytic event takes place and the catalytic activity is acquired. This encoded protein is widely expressed and one of the seven basic amino acid-specific members which cleave their substrates at single or paired basic residues. It mediates posttranslational endoproteolytic processing for several integrin alpha subunits and is thought to process prorenin, pro-membrane type-1 matrix metalloproteinase and HIV-1 glycoprotein gp160. Alternative splicing results in multiple transcript variants, some of which encode distinct isoforms, including a protease packaged into dense core granules (PC5A) and a type 1 membrane bound protease (PC5B). [provided by RefSeq, May 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.18362278).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PCSK5	NM_001372043.1	c.893T>C	p.Met298Thr	missense_variant, splice_region_variant	7/38	ENST00000674117.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PCSK5	ENST00000674117.1	c.893T>C	p.Met298Thr	missense_variant, splice_region_variant	7/38		NM_001372043.1	A2
PCSK5	ENST00000376752.9	c.893T>C	p.Met298Thr	missense_variant, splice_region_variant	7/21	1
PCSK5	ENST00000545128.5	c.893T>C	p.Met298Thr	missense_variant, splice_region_variant	7/37	5		P4
PCSK5	ENST00000376767.7	n.1405T>C		splice_region_variant, non_coding_transcript_exon_variant	7/14	2

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152162 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000192

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 30

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152162 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74322

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000192

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 22, 2023

The c.893T>C (p.M298T) alteration is located in exon 7 (coding exon 7) of the PCSK5 gene. This alteration results from a T to C substitution at nucleotide position 893, causing the methionine (M) at amino acid position 298 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	0.12
BayesDel_addAF	Benign	-0.032	T
BayesDel_noAF	Benign	-0.28
CADD	Benign	21
DANN	Benign	0.93
DEOGEN2	Benign	0.051	T;.;.
Eigen	Benign	-0.44
Eigen_PC	Benign	-0.14
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Benign	0.80	T;T;T
M_CAP	Benign	0.027	D
MetaRNN	Benign	0.18	T;T;T
MetaSVM	Benign	-0.78	T
MutationAssessor	Benign	-0.75	N;.;N
MutationTaster	Benign	0.81	N;N;N
PrimateAI	Uncertain	0.76	T
PROVEAN	Benign	-0.45	N;N;N
REVEL	Benign	0.26
Sift	Benign	1.0	T;T;T
Sift4G	Benign	1.0	T;T;T
Polyphen		0.0	.;B;B
Vest4		0.24
MutPred		0.47		Gain of phosphorylation at M298 (P = 0.0431);Gain of phosphorylation at M298 (P = 0.0431);Gain of phosphorylation at M298 (P = 0.0431);
MVP		0.77
MPC		1.0
ClinPred		0.22	T
GERP RS		5.7
Varity_R		0.081
gMVP		0.91

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.017
dbscSNV1_RF	Benign	0.17
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: rs1168241473; hg19: chr9-78686813;