6-32403039-G-T

Variant names:

• chr6-32403039-G-T
• NM_001304561.2:c.605C>A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001304561.2(BTNL2):​c.605C>A​(p.Ala202Glu) 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. 15/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A202V) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: BTNL2 NM_001304561.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.36

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

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.18561724).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BTNL2	NM_001304561.2	c.605C>A	p.Ala202Glu	missense_variant	Exon 3 of 8	ENST00000454136.8	NP_001291490.1
TSBP1-AS1	NR_136245.1	n.303-2415G>T		intron_variant	Intron 2 of 3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BTNL2	ENST00000454136.8	c.605C>A	p.Ala202Glu	missense_variant	Exon 3 of 8	5	NM_001304561.2	ENSP00000390613.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 46

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.18
BayesDel_addAF	Benign	-0.087	T
BayesDel_noAF	Benign	-0.36
CADD	Benign	19
DANN	Uncertain	0.99
DEOGEN2	Benign	0.031	T;T
Eigen	Benign	-0.72
Eigen_PC	Benign	-0.63
FATHMM_MKL	Benign	0.22	N
M_CAP	Benign	0.074	D
MetaRNN	Benign	0.19	T;T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	0.81	.;L
PrimateAI	Benign	0.43	T
PROVEAN	Benign	-1.7	.;N
REVEL	Benign	0.20
Sift	Uncertain	0.0010	.;D
Sift4G	Uncertain	0.012	D;D
Polyphen		0.0010	.;B
Vest4		0.24
MutPred		0.56		Gain of sheet (P = 0.0827);Gain of sheet (P = 0.0827);
MVP		0.69
MPC		0.87
ClinPred		0.57	D
GERP RS		4.4
Varity_R		0.090
gMVP		0.59

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr6-32370816;