Genetic Variant SPESP1:p.Thr91Ser (chr15-68945806-C-G) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_145658.4(SPESP1):c.272C>G(p.Thr91Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000415 in 1,613,772 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000027 ( 0 hom. )

Consequence

SPESP1
NM_145658.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.377

Variant links:

Genes affected

SPESP1 (HGNC:15570): (sperm equatorial segment protein 1) The encoded protein is a human alloantigen involved in sperm-egg binding and fusion. [provided by RefSeq, Apr 2010]

SPESP1 links:

NOX5 (HGNC:):

NOX5 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.022419125).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SPESP1	NM_145658.4 link	c.272C>G	p.Thr91Ser	missense_variant	Exon 2 of 2	ENST00000310673.4	NP_663633.1	Q6UW49
SPESP1-NOX5	NM_001184780.2 link	c.29+15089C>G		intron_variant	Intron 1 of 15		NP_001171709.1	Q96PH1-6A3QRJ0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SPESP1	ENST00000310673.4 link	c.272C>G	p.Thr91Ser	missense_variant	Exon 2 of 2	1	NM_145658.4	ENSP00000312284.3		Q6UW49
NOX5	ENST00000260364.9 link	c.-109+15089C>G		intron_variant	Intron 1 of 16	1		ENSP00000454143.1		Q96PH1-2

Frequencies

GnomAD3 genomes

AF:

0.000178

AC:

AN:

152036

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000531

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:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000439

AC:

AN:

250716

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135540

show subpopulations

Gnomad AFR exome

AF:

0.000616

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000883

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000274

AC:

AN:

1461736

Hom.:

Cov.:

AF XY:

0.0000234

AC XY:

AN XY:

727172

show subpopulations

Gnomad4 AFR exome

AF:

0.000628

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000135

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.000178

AC:

AN:

152036

Hom.:

Cov.:

AF XY:

0.000135

AC XY:

AN XY:

74274

show subpopulations

Gnomad4 AFR

AF:

0.000531

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000793

Hom.:

Bravo

AF:

0.000185

ExAC

AF:

0.0000412

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 06, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.272C>G (p.T91S) alteration is located in exon 2 (coding exon 2) of the SPESP1 gene. This alteration results from a C to G substitution at nucleotide position 272, causing the threonine (T) at amino acid position 91 to be replaced by a serine (S). 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

-0.63

BayesDel_noAF

Benign

-0.78

CADD

Benign

0.15

DANN

Benign

0.64

DEOGEN2

Benign

0.048

Eigen

Benign

-1.6

Eigen_PC

Benign

-1.7

FATHMM_MKL

Benign

0.0054

LIST_S2

Benign

0.30

M_CAP

Benign

0.0034

MetaRNN

Benign

0.022

MetaSVM

Benign

-0.95

MutationAssessor

Benign

-0.34

PrimateAI

Benign

0.30

PROVEAN

Benign

-1.3

REVEL

Benign

0.064

Sift

Benign

0.086

Sift4G

Uncertain

0.039

Polyphen

0.0030

Vest4

0.035

MutPred

0.14

Gain of phosphorylation at T91 (P = 0.0974);

MVP

0.048

MPC

0.039

ClinPred

0.039

GERP RS

-10

Varity_R

0.042

gMVP

0.073

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over