6-32396360-G-C

Variant summary

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

The NM_001304561.2(BTNL2):c.757C>G(p.Gln253Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000238 in 1,612,592 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00022 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00024 ( 0 hom. )

Consequence

BTNL2
NM_001304561.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.08

Variant links:

Genes affected

BTNL2 (HGNC:1142): (butyrophilin like 2) This gene encodes a major histocompatibility complex, class II associated, type I transmembrane protein which belongs to the butyrophilin-like B7 family of immunoregulators. It is thought to be involved in immune surveillance, serving as a negative T-cell regulator by decreasing T-cell proliferation and cytokine release. The encoded protein contains an N-terminal signal peptide, two pairs of immunoglobulin-like domains, separated by a heptad peptide sequence, and a C-terminal transmembrane domain. Naturally occurring mutations in this gene are associated with sarcoidosis, rheumatoid arthritis, ulcerative colitis, inflammatory bowel disease, myositis, type 1 diabetes, systemic lupus erythematosus, acute coronary syndrome, and prostate cancer. [provided by RefSeq, May 2017]

BTNL2 links:

TSBP1-AS1 (HGNC:39756): (TSBP1 and BTNL2 antisense RNA 1)

TSBP1-AS1 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=0.047248334).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BTNL2	NM_001304561.2 linkuse as main transcript	c.757C>G	p.Gln253Glu	missense_variant	5/8	ENST00000454136.8
TSBP1-AS1	NR_136245.1 linkuse as main transcript	n.303-9094G>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BTNL2	ENST00000454136.8 linkuse as main transcript	c.757C>G	p.Gln253Glu	missense_variant	5/8	5	NM_001304561.2	P1
TSBP1-AS1	ENST00000645134.1 linkuse as main transcript	n.627+5607G>C		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes

AF:

0.000217

AC:

AN:

152204

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

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:

0.000441

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000155

AC:

AN:

244606

Hom.:

AF XY:

0.000120

AC XY:

AN XY:

133454

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:

0.0000991

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000321

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000240

AC:

351

AN:

1460388

Hom.:

Cov.:

AF XY:

0.000226

AC XY:

164

AN XY:

726444

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:

0.0000580

Gnomad4 FIN exome

AF:

0.0000191

Gnomad4 NFE exome

AF:

0.000301

Gnomad4 OTH exome

AF:

0.000166

GnomAD4 genome

AF:

0.000217

AC:

AN:

152204

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

AN XY:

74362

show subpopulations

Gnomad4 AFR

AF:

0.0000483

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:

0.000441

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.000288

Hom.:

Bravo

AF:

0.000196

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.000162

AC:

EpiCase

AF:

0.000545

EpiControl

AF:

0.000237

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 14, 2022

The c.757C>G (p.Q253E) alteration is located in exon 5 (coding exon 5) of the BTNL2 gene. This alteration results from a C to G substitution at nucleotide position 757, causing the glutamine (Q) at amino acid position 253 to be replaced by a glutamic acid (E). 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

0.071

BayesDel_addAF

Benign

-0.41

BayesDel_noAF

Benign

-0.52

Cadd

Benign

8.5

Dann

Benign

0.48

DEOGEN2

Benign

0.0050

T;T

Eigen

Benign

-0.65

Eigen_PC

Benign

-0.54

FATHMM_MKL

Benign

0.16

M_CAP

Benign

0.014

MetaRNN

Benign

0.047

T;T

MetaSVM

Benign

-1.0

MutationTaster

Benign

1.0

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

PrimateAI

Benign

0.46

Sift4G

Benign

0.45

T;T

Polyphen

0.0080

.;B

Vest4

0.078

MVP

0.59

MPC

0.43

ClinPred

0.012

GERP RS

3.3

Varity_R

0.098

gMVP

0.22

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