6-32403058-T-G

Position:

• chr6-32403058-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001304561.2(BTNL2):​c.586A>C​(p.Lys196Gln) 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. 16/20 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. K196E) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: BTNL2 NM_001304561.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.137

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 (HGNC:):

ACMG classification

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=0.35241336).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BTNL2	NM_001304561.2	c.586A>C	p.Lys196Gln	missense_variant	3/8	ENST00000454136.8	NP_001291490.1
TSBP1-AS1	NR_136245.1	n.303-2396T>G		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BTNL2	ENST00000454136.8	c.586A>C	p.Lys196Gln	missense_variant	3/8	5	NM_001304561.2	ENSP00000390613.3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 61

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.091
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	7.1
DANN	Benign	0.92
DEOGEN2	Benign	0.013	T;T
Eigen	Benign	-0.99
Eigen_PC	Benign	-0.97
FATHMM_MKL	Benign	0.067	N
M_CAP	Benign	0.021	T
MetaRNN	Benign	0.35	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.69	.;N
PrimateAI	Benign	0.33	T
PROVEAN	Benign	0.28	.;N
REVEL	Benign	0.061
Sift	Benign	0.29	.;T
Sift4G	Benign	0.40	T;T
Polyphen		0.017	.;B
Vest4		0.032
MutPred		0.28		Loss of ubiquitination at K196 (P = 0.0098);Loss of ubiquitination at K196 (P = 0.0098);
MVP		0.54
MPC		0.45
ClinPred		0.081	T
GERP RS		2.6
Varity_R		0.050
gMVP		0.11

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

Other links and lift over

dbSNP: rs2076523; hg19: chr6-32370835;