1-151666010-T-C

Position:

• chr1-151666010-T-C

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 0P and 19B. BP4_Moderate BP6_Very_Strong BP7 BS1 BS2

The NM_001330723.2(SNX27):​c.984T>C​(p.Phe328=) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000834 in 1,609,738 control chromosomes in the GnomAD database, including 8 homozygotes. In-silico tool predicts 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 Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0041 (2 hom., cov: 32)
  • Exomes 𝑓: 0.00049 (6 hom.)
• Consequence: SNX27 NM_001330723.2 splice_region, synonymous
• Scores: Splicing: ADA: 0.001161
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: 1.37

Genes affected

SNX27 (HGNC:20073): (sorting nexin 27) This gene encodes a member of the sorting nexin family, a diverse group of cytoplasmic and membrane-associated proteins involved in endocytosis of plasma membrane receptors and protein trafficking through these compartments. All members of this protein family contain a phosphoinositide binding domain (PX domain). A highly similar protein in mouse is responsible for the specific recruitment of an isoform of serotonin 5-hydroxytryptamine 4 receptor into early endosomes, suggesting the analogous role for the human protein. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -19 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.35).
• BP6: Variant 1-151666010-T-C is Benign according to our data. Variant chr1-151666010-T-C is described in ClinVar as [Benign]. Clinvar id is 462822.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=1.37 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00412 (628/152370) while in subpopulation AFR AF= 0.0134 (559/41592). AF 95% confidence interval is 0.0125. There are 2 homozygotes in gnomad4. There are 283 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 628 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SNX27	NM_001330723.2	c.984T>C	p.Phe328=	splice_region_variant, synonymous_variant	6/12	ENST00000458013.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SNX27	ENST00000458013.7	c.984T>C	p.Phe328=	splice_region_variant, synonymous_variant	6/12	5	NM_001330723.2	P1

Frequencies

GnomAD3 genomes AF: 0.00411 AC: 626 AN: 152252 Hom.: 2 Cov.: 32

Gnomad AFR AF: 0.0134

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00118

Gnomad ASJ AF: 0.0101

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000118

Gnomad OTH AF: 0.00382

GnomAD3 exomes AF: 0.00119 AC: 298 AN: 249520 Hom.: 3 AF XY: 0.000867 AC XY: 117 AN XY: 134902

Gnomad AFR exome AF: 0.0133

Gnomad AMR exome AF: 0.000444

Gnomad ASJ exome AF: 0.00536

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000706

Gnomad OTH exome AF: 0.000990

GnomAD4 exome AF: 0.000490 AC: 714 AN: 1457368 Hom.: 6 Cov.: 29 AF XY: 0.000466 AC XY: 338 AN XY: 725004

Gnomad4 AFR exome AF: 0.0131

Gnomad4 AMR exome AF: 0.000360

Gnomad4 ASJ exome AF: 0.00579

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000117

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000361

Gnomad4 OTH exome AF: 0.00106

GnomAD4 genome AF: 0.00412 AC: 628 AN: 152370 Hom.: 2 Cov.: 32 AF XY: 0.00380 AC XY: 283 AN XY: 74510

Gnomad4 AFR AF: 0.0134

Gnomad4 AMR AF: 0.00118

Gnomad4 ASJ AF: 0.0101

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000118

Gnomad4 OTH AF: 0.00378

Alfa AF: 0.00101 Hom.: 1

Bravo AF: 0.00420

Asia WGS AF: 0.000866 AC: 3 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

SNX27-related disorder Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 17, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

not provided Benign:1

Benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

-

- -

Severe myoclonic epilepsy in infancy Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 30, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.35
CADD	Benign	12
DANN	Benign	0.87

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.0012
dbscSNV1_RF	Benign	0.020
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: rs150091333; hg19: chr1-151638486;