Genetic Variant SMAP1:p.Ala2Val (chr6-70668028-C-T) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_001044305.3(SMAP1):c.5C>T(p.Ala2Val) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

SMAP1
NM_001044305.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.20

Publications

0 publications found

Variant links:

Genes affected

SMAP1 (HGNC:19651): (small ArfGAP 1) The protein encoded by this gene is similar to the mouse stromal membrane-associated protein-1. This similarity suggests that this human gene product is also a type II membrane glycoprotein involved in the erythropoietic stimulatory activity of stromal cells. Alternate splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]

SMAP1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.3886935).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMAP1	NM_001044305.3 link	c.5C>T	p.Ala2Val	missense_variant	Exon 1 of 11	ENST00000370455.8	NP_001037770.1	Q8IYB5-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SMAP1	ENST00000370455.8 link	c.5C>T	p.Ala2Val	missense_variant	Exon 1 of 11	1	NM_001044305.3	ENSP00000359484.3	Q8IYB5-1
SMAP1	ENST00000316999.9 link	c.5C>T	p.Ala2Val	missense_variant	Exon 1 of 10	1		ENSP00000313382.5	Q8IYB5-2
SMAP1	ENST00000370452.7 link	c.5C>T	p.Ala2Val	missense_variant	Exon 1 of 11	2		ENSP00000359481.3	Q8IYB5-3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0;AS_VQSR

AF:

0.00

AC:

AN:

1441776

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

716590

African (AFR)

AF:

0.00

AC:

AN:

31292

American (AMR)

AF:

0.00

AC:

AN:

42614

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25484

East Asian (EAS)

AF:

0.00

AC:

AN:

37728

South Asian (SAS)

AF:

0.00

AC:

AN:

84104

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51920

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5448

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1103680

Other (OTH)

AF:

0.00

AC:

AN:

59506

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 01, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.5C>T (p.A2V) alteration is located in exon 1 (coding exon 1) of the SMAP1 gene. This alteration results from a C to T substitution at nucleotide position 5, causing the alanine (A) at amino acid position 2 to be replaced by a valine (V). 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

Pathogenic

0.91

BayesDel_addAF

Benign

-0.10

BayesDel_noAF

Benign

-0.39

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.019

.;.;T

Eigen

Benign

0.13

Eigen_PC

Benign

0.15

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.87

D;D;D

M_CAP

Uncertain

0.27

MetaRNN

Benign

0.39

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.2

L;L;L

PhyloP100

7.2

PrimateAI

Pathogenic

0.80

PROVEAN

Benign

-0.79

N;N;N

REVEL

Benign

0.13

Sift

Benign

0.10

T;T;T

Sift4G

Benign

0.20

T;T;T

Polyphen

0.97

D;P;P

Vest4

0.31

MutPred

0.34

Loss of catalytic residue at A2 (P = 0.1381);Loss of catalytic residue at A2 (P = 0.1381);Loss of catalytic residue at A2 (P = 0.1381);

MVP

0.34

MPC

1.4

ClinPred

0.93

GERP RS

4.4

PromoterAI

-0.33

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.22

gMVP

0.60

Mutation Taster

=70/30

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over