22-20779777-C-T

Variant names:

• chr22-20779777-C-T
• rs1436702764
• NM_000185.4:c.465C>T

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_Strong BP6 BP7 BS2

The NM_000185.4(SERPIND1):​c.465C>T​(p.Pro155Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000149 in 1,614,092 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (no stars).

• Frequency:
  • Genomes: 𝑓 0.000026 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000014 (0 hom.)
• Consequence: SERPIND1 NM_000185.4 synonymous
• Clinical Significance: Likely benign no assertion criteria provided B:1
• Conservation: PhyloP100: -1.82
• Publications: 0 publications found

Genes affected

SERPIND1 (HGNC:4838): (serpin family D member 1) This gene belongs to the serpin gene superfamily. Serpins play roles in many processes including inflammation, blood clotting, and cancer metastasis. Members of this family have highly conserved secondary structures with a reactive center loop that interacts with the protease active site to inhibit protease activity. This gene encodes a plasma serine protease that functions as a thrombin and chymotrypsin inhibitor. The protein is activated by heparin, dermatan sulfate, and glycosaminoglycans. Allelic variations in this gene are associated with heparin cofactor II deficiency. [provided by RefSeq, Jul 2015]

PI4KA (HGNC:8983): (phosphatidylinositol 4-kinase alpha) This gene encodes a phosphatidylinositol (PI) 4-kinase which catalyzes the first committed step in the biosynthesis of phosphatidylinositol 4,5-bisphosphate. The mammalian PI 4-kinases have been classified into two types, II and III, based on their molecular mass, and modulation by detergent and adenosine. The protein encoded by this gene is a type III enzyme that is not inhibited by adenosine. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Apr 2018]

PI4KA Gene-Disease associations (from GenCC):

• polymicrogyria, perisylvian, with cerebellar hypoplasia and arthrogryposis

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.77).
• BP6: Variant 22-20779777-C-T is Benign according to our data. Variant chr22-20779777-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 3030144.Status of the report is no_assertion_criteria_provided, 0 stars.
• BP7: Synonymous conserved (PhyloP=-1.82 with no splicing effect.
• BS2: High AC in GnomAdExome4 at 20 Unknown,AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000185.4. 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
	SERPIND1	NM_000185.4	MANE Select	c.465C>T	p.Pro155Pro	synonymous	Exon 2 of 5	NP_000176.2	P05546-1
	PI4KA	NM_058004.4	MANE Select	c.2328+13416G>A		intron	N/A	NP_477352.3	P42356-1
	PI4KA	NM_001362863.2		c.2262+13416G>A		intron	N/A	NP_001349792.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SERPIND1	ENST00000215727.10	TSL:1 MANE Select	c.465C>T	p.Pro155Pro	synonymous	Exon 2 of 5	ENSP00000215727.5	P05546-1
	SERPIND1	ENST00000406799.1	TSL:1	c.465C>T	p.Pro155Pro	synonymous	Exon 1 of 4	ENSP00000384050.1	P05546-1
	PI4KA	ENST00000255882.11	TSL:1 MANE Select	c.2328+13416G>A		intron	N/A	ENSP00000255882.6	P42356-1

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152200 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000482

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000294

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.0000137 AC: 20 AN: 1461892 Hom.: 0 Cov.: 31 AF XY: 0.00000963 AC XY: 7 AN XY: 727248

African (AFR) AF: 0.0000299 AC: 1 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000162 AC: 18 AN: 1112012

Other (OTH) AF: 0.0000166 AC: 1 AN: 60396

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152200 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74354

African (AFR) AF: 0.0000482 AC: 2 AN: 41460

American (AMR) AF: 0.00 AC: 0 AN: 15268

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5200

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10616

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000294 AC: 2 AN: 68036

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.0000564 Hom.: 0

Bravo AF: 0.0000264

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	-	1	SERPIND1-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.77
CADD	Benign	0.11
DANN	Benign	0.90
PhyloP100		-1.8

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

Other links and lift over

dbSNP: rs1436702764; hg19: chr22-21134065;