2-9279325-C-T

Position:

• chr2-9279325-C-T

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_003887.3(ASAP2):​c.135C>T​(p.Asp45=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00202 in 1,614,018 control chromosomes in the GnomAD database, including 39 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.010 (18 hom., cov: 33)
  • Exomes 𝑓: 0.0012 (21 hom.)
• Consequence: ASAP2 NM_003887.3 synonymous
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -1.06

Genes affected

ASAP2 (HGNC:2721): (ArfGAP with SH3 domain, ankyrin repeat and PH domain 2) This gene encodes a multidomain protein containing an N-terminal alpha-helical region with a coiled-coil motif, followed by a pleckstrin homology (PH) domain, an Arf-GAP domain, an ankyrin homology region, a proline-rich region, and a C-terminal Src homology 3 (SH3) domain. The protein localizes in the Golgi apparatus and at the plasma membrane, where it colocalizes with protein tyrosine kinase 2-beta (PYK2). The encoded protein forms a stable complex with PYK2 in vivo. This interaction appears to be mediated by binding of its SH3 domain to the C-terminal proline-rich domain of PYK2. The encoded protein is tyrosine phosphorylated by activated PYK2. It has catalytic activity for class I and II ArfGAPs in vitro, and can bind the class III Arf ARF6 without immediate GAP activity. The encoded protein is believed to function as an ARF GAP that controls ARF-mediated vesicle budding when recruited to Golgi membranes. In addition, it functions as a substrate and downstream target for PYK2 and SRC, a pathway that may be involved in the regulation of vesicular transport. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2008]

ACMG classification

Verdict is Benign. Variant got -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.57).
• BP6: Variant 2-9279325-C-T is Benign according to our data. Variant chr2-9279325-C-T is described in ClinVar as [Benign]. Clinvar id is 767782.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-1.06 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0102 (1559/152204) while in subpopulation AFR AF= 0.0358 (1486/41506). AF 95% confidence interval is 0.0343. There are 18 homozygotes in gnomad4. There are 746 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 18 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ASAP2	NM_003887.3	c.135C>T	p.Asp45=	synonymous_variant	2/28	ENST00000281419.8	NP_003878.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ASAP2	ENST00000281419.8	c.135C>T	p.Asp45=	synonymous_variant	2/28	1	NM_003887.3	ENSP00000281419	P3
ASAP2	ENST00000315273.4	c.135C>T	p.Asp45=	synonymous_variant	2/27	1		ENSP00000316404	A1

Frequencies

GnomAD3 genomes AF: 0.0102 AC: 1558 AN: 152086 Hom.: 18 Cov.: 33

Gnomad AFR AF: 0.0359

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00275

Gnomad ASJ AF: 0.00259

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000735

Gnomad OTH AF: 0.00813

GnomAD3 exomes AF: 0.00300 AC: 754 AN: 251462 Hom.: 8 AF XY: 0.00217 AC XY: 295 AN XY: 135902

Gnomad AFR exome AF: 0.0392

Gnomad AMR exome AF: 0.00194

Gnomad ASJ exome AF: 0.00218

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000653

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000106

Gnomad OTH exome AF: 0.00228

GnomAD4 exome AF: 0.00116 AC: 1703 AN: 1461814 Hom.: 21 Cov.: 32 AF XY: 0.000980 AC XY: 713 AN XY: 727218

Gnomad4 AFR exome AF: 0.0394

Gnomad4 AMR exome AF: 0.00206

Gnomad4 ASJ exome AF: 0.00165

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000580

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000657

Gnomad4 OTH exome AF: 0.00268

GnomAD4 genome AF: 0.0102 AC: 1559 AN: 152204 Hom.: 18 Cov.: 33 AF XY: 0.0100 AC XY: 746 AN XY: 74416

Gnomad4 AFR AF: 0.0358

Gnomad4 AMR AF: 0.00275

Gnomad4 ASJ AF: 0.00259

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000735

Gnomad4 OTH AF: 0.00805

Alfa AF: 0.00602 Hom.: 5

Bravo AF: 0.0120

Asia WGS AF: 0.000577 AC: 2 AN: 3478

EpiCase AF: 0.000109

EpiControl AF: 0.000296

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	May 08, 2018	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.57
CADD	Benign	5.7
DANN	Benign	0.62

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: rs35357758; hg19: chr2-9419454;