6-32405086-A-C

Variant names:

• chr6-32405086-A-C
• rs28362682
• NM_001304561.2:c.280T>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001304561.2(BTNL2):​c.280T>G​(p.Trp94Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 17/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: BTNL2 NM_001304561.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.244
• Publications: 21 publications found

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]

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.24190187).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BTNL2	NM_001304561.2	c.280T>G	p.Trp94Gly	missense_variant	Exon 2 of 8	ENST00000454136.8	NP_001291490.1
TSBP1-AS1	NR_136245.1	n.303-368A>C		intron_variant	Intron 2 of 3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BTNL2	ENST00000454136.8	c.280T>G	p.Trp94Gly	missense_variant	Exon 2 of 8	5	NM_001304561.2	ENSP00000390613.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 418

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.071
BayesDel_addAF	Benign	-0.058	T
BayesDel_noAF	Benign	-0.32
CADD	Benign	19
DANN	Benign	0.90
DEOGEN2	Benign	0.0086	T;T;.
Eigen	Benign	-0.87
Eigen_PC	Benign	-0.76
FATHMM_MKL	Benign	0.085	N
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.24	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.0	.;N;.
PhyloP100		0.24
PrimateAI	Benign	0.35	T
PROVEAN	Benign	0.35	.;N;N
REVEL	Benign	0.16
Sift	Uncertain	0.0020	.;D;D
Sift4G	Uncertain	0.017	D;D;.
Polyphen		0.0010	.;B;.
Vest4		0.18
MutPred		0.61		Gain of disorder (P = 0.0168);Gain of disorder (P = 0.0168);.;
MVP		0.36
MPC		0.69
ClinPred		0.76	D
GERP RS		3.0
Varity_R		0.13
gMVP		0.44
Mutation Taster		=99/1	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs28362682; hg19: chr6-32372863; COSMIC: COSV66631563;