6-26444196-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_006994.5(BTN3A3):c.325G>C(p.Ala109Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000171 in 1,459,716 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 Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

BTN3A3
NM_006994.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.390

Variant links:

Genes affected

BTN3A3 (HGNC:1140): (butyrophilin subfamily 3 member A3) The butyrophilin (BTN) genes are a group of major histocompatibility complex (MHC)-associated genes that encode type I membrane proteins with 2 extracellular immunoglobulin (Ig) domains and an intracellular B30.2 (PRYSPRY) domain. Three subfamilies of human BTN genes are located in the MHC class I region: the single-copy BTN1A1 gene (MIM 601610) and the BTN2 (e.g., BTN2A1; MIM 613590) and BTN3 (e.g., BNT3A3) genes, which have undergone tandem duplication, resulting in 3 copies of each (summary by Smith et al., 2010 [PubMed 20208008]).[supplied by OMIM, Nov 2010]

BTN3A3 links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.28370202).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
BTN3A3	NM_006994.5 linkuse as main transcript	c.325G>C	p.Ala109Pro	missense_variant	4/11	ENST00000244519.7
BTN3A3	NM_197974.3 linkuse as main transcript	c.199G>C	p.Ala67Pro	missense_variant	4/10
BTN3A3	NM_001242803.2 linkuse as main transcript	c.199G>C	p.Ala67Pro	missense_variant	2/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BTN3A3	ENST00000244519.7 linkuse as main transcript	c.325G>C	p.Ala109Pro	missense_variant	4/11	1	NM_006994.5	P1	O00478-1
	ENST00000707189.1 linkuse as main transcript	n.1000-108991G>C		intron_variant, non_coding_transcript_variant
	ENST00000707191.1 linkuse as main transcript	n.1001-88509G>C		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000808

AC:

AN:

247438

Hom.:

AF XY:

0.00000746

AC XY:

AN XY:

134082

show subpopulations

Gnomad AFR exome

AF:

0.00

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:

0.0000181

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000171

AC:

AN:

1459716

Hom.:

Cov.:

AF XY:

0.0000165

AC XY:

AN XY:

726164

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000180

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000595

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 06, 2021

The c.325G>C (p.A109P) alteration is located in exon 4 (coding exon 2) of the BTN3A3 gene. This alteration results from a G to C substitution at nucleotide position 325, causing the alanine (A) at amino acid position 109 to be replaced by a proline (P). 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

0.83

BayesDel_addAF

Uncertain

0.086

BayesDel_noAF

Benign

-0.10

Cadd

Benign

Dann

Uncertain

0.99

Eigen

Benign

-0.26

Eigen_PC

Benign

-0.54

FATHMM_MKL

Benign

0.046

LIST_S2

Uncertain

0.92

D;D;D;T;D;D;D;D;D

M_CAP

Benign

0.015

MetaRNN

Benign

0.28

T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.80

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.33

PROVEAN

Uncertain

-3.2

D;D;D;D;D;D;D;N;D

REVEL

Uncertain

0.30

Sift

Uncertain

0.0030

D;D;D;D;D;D;D;D;D

Sift4G

Uncertain

0.046

D;D;D;T;D;D;T;D;D

Polyphen

1.0

.;.;D;.;.;.;.;.;.

Vest4

0.58, 0.57

MVP

0.73

MPC

4.2

ClinPred

0.67

GERP RS

0.66

Varity_R

0.67

gMVP

0.48

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

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